us-ct/form/drs/ty2026

(ct-1040es)Form CT-1040ES 2026 Estimated Connecticut Income Tax Payment Coupon for Individuals#

(ct-1040es)(document-1)#

Completing the Payment Coupon Complete the attached payment coupons in blue or black ink only. You must enter all the required taxpayer identification information. Enter the payment amount below. In determining your payment amount, you may subtract from your installment amount any available overpayment of 2025 income tax. Department of Revenue Services State of Connecticut PO Box 2932 Hartford CT 06104-2932 1040ES 0126W 01 9999 Form CT-1040ES Estimated Connecticut Income Tax Payment Coupon for Individuals    Your first name Middle initial Last name Your Social Security Number Spouse’s first name Middle initial Last name Spouse’s Social Security Number Mailing address (number and street), Apartment number, PO Box Due date City, town, or post office State ZIP code Payment amount .00 See coupon instructions on back. (MM-DD-YYYY) Department of Revenue Services State of Connecticut Form CT-1040ES 2026 Estimated Connecticut Income Tax Payment Coupon for Individuals Form CT-1040ES can be filed and paid electronically using myconneCT at portal.ct.gov/DRS-myconneCT. Who Should File This Coupon: Use this coupon if you are required to make estimated income tax payments for the 2026 taxable year. Please note that each form is year specific. To prevent any delay in processing your return, the correct year’s form must be submitted to DRS. General Instructions Nonresidents and Part‑Year Residents: Nonresident individuals are subject to Connecticut income tax on their Connecticut‑sourced income. Part‑year residents are taxed on all income received while a resident of Connecticut and on income received from Connecticut sources while a nonresident. Connecticut‑sourced income includes but is not limited to income from a business, profession, occupation, or trade conducted in this state as well as income from the rental or sale of real or tangible property located in Connecticut. Convenience of the Employer: Residents of states with a “convenience of the employer” test will be subject to similar rules for work performed for a Connecticut employer. Who Is Required to Make Estimated Payments: You must make estimated income tax payments if: 1. Your Connecticut income tax, after taking into account your Connecticut tax withheld, and any Pass-Through Entity Tax Credit (PE Tax Credit) you are allowed to claim, is $1,000 or more; and 2. You expect your Connecticut income tax withheld (including any PE Tax Credit) to be less than your required annual payment for the 2026 taxable year. Your required annual payment is the lesser of: • 90% of the income tax shown on your 2026 Connecticut income tax return; or • 100% of the income tax shown on your 2025 Connecticut income tax return if you filed a 2025 Connecticut income tax return that covered a 12‑month period. You do not have to make estimated income tax payments if you were a: • Connecticut resident during the 2025 taxable year and you did not file a 2025 income tax return because you had no Connecticut income tax liability; or • Nonresident or part‑year resident with Connecticut‑sourced income during the 2025 taxable year and you did not file a 2025 income tax return because you had no Connecticut income tax liability. If you were a nonresident or part‑year resident and you did not have Connecticut‑sourced income during the 2025 taxable year, then you must use 90% of the income tax shown on your 2026 Connecticut income tax return as your required annual payment. When to File: Estimated payments for the 2026 taxable year are due on or before April 15, June 15, September 15, 2026, and January 15, 2027. Fiscal year filers should follow federal filing dates. If the due date falls on a Saturday, Sunday, or legal holiday, your estimated payment will be considered timely if filed on the next business day. An estimate will be considered timely if received, or if the date shown by the U.S. Postal Service cancellation mark, is on or before the due date. Visit the DRS website at portal.ct.gov/DRS-myconneCT to make your estimated payments online and receive immediate confirmation that your payment was timely remitted. How Much Should I Pay: Complete the 2026 Estimated Connecticut Income Tax Worksheet on Page 3 to calculate your required annual payment. Special Rules for Farmers and Fishermen: If you are a farmer or fisherman (as defined in Internal Revenue Code § 6654(i)(2)), see Informational Publication 2021(2), Farmer’s Guide to Sales and Use Taxes, Motor Vehicle Fuels Tax, Estimated Income Tax, and Withholding Tax. Pension or Annuity Income Recipients: If your filing status is single, married filing separately, or head of household with federal adjusted gross income (AGI) for the taxable year of less than $100,000 or married filing jointly with federal AGI of less than $150,000, and you receive distributions from certain pensions and annuities, such as from a defined benefit plan, 401(k), 403(b) or 457(b) plans, or from an IRA (other than a Roth IRA), you may be able to deduct all or a portion of such pension or annuity income in determining your Connecticut adjusted gross income (AGI). For assistance in determining whether you are eligible to deduct all or a portion of your pension or annuity, see Pension and Annuity Worksheet on Page 4. 2026 (Rev. 01/26) 2026 (Rev. 01/26) Visit us at portal.ct.gov/DRS for more information.

Form CT‑1040ES (Rev. 01/26) Page 2 of 8 • See Payment Options, on Page 8. • Print all information. Include your spouse’s SSN, if married filing jointly. • Cut along dotted line and mail coupon and payment to the address below. • Make your check payable to Commissioner of Revenue Services. • Do not use staples. • DRS may submit your check to your bank electronically. • To ensure proper posting, write your SSN(s) (optional) and “2026 Form CT‑1040ES” on your check. Send completed coupon and payment to:

Department of Revenue Services

PO Box 2932

Hartford CT 06104-2932 Form CT-1040ES - Tax Payment Coupon Instructions Instructions continue on Page 8 Members of Partnerships and Shareholders of S corporations: If you are a partner in a partnership or shareholder of an S corporation, you must continue to include your distributive or pro-rata share of income when determining your estimated payments. However, in determining your estimated payments, you take into account any PE Tax Credit you expect to claim for the 2026 taxable year. In general, you are required to make estimated payments based upon 100% of your prior year tax or 90% of your current year tax. Because of the potential variability in your income and credits, you may prefer to pay 100% of the tax shown on your 2025 return to avoid underpayment interest (2210 interest). You are required to pay the full amount of your 2026 tax liability by April 15, 2027, either with a timely filed return or with an extension request. Otherwise, you may incur late payment penalties. Annualized Income Installment Method: If your income varies throughout the year, you may be able to reduce or eliminate the amount of your estimated tax payment for one or more periods by using the annualized income installment method. See Informational Publication 2018(11), A Guide to Calculating Your Annualized Estimated Income Tax Installments and Worksheet CT‑1040 AES. Interest: You may be charged interest if you did not pay enough tax through withholding, estimated payments, or both, by the installment due date, or if any PE Tax Credit reported to you on Schedule CT K‑1, Part 4, Line 1, or Schedule CT‑1041 K‑1, Part 4, Line 1, is not sufficient to cover your tax liability by the installment due date. This is true even if you are due a refund when you file your tax return. Interest is calculated separately for each installment. Therefore, you may owe interest for an earlier installment even if you paid enough tax later to make up for the underpayment. Interest at 1% per month or fraction of a month will be added to the tax due until the earlier of April 15, 2027, or the date on which the underpayment is paid. If you file your income tax return for the 2026 taxable year on or before January 31, 2027, and pay in full the amount computed on the return as payable on or before that date, you will not be charged interest for failing to make the estimated payment due January 15, 2027. A farmer or fisherman who files a 2026 Connecticut income tax return on or before March 1, 2027, and pays in full the amount computed on the return as payable on or before that date, will not be charged interest for underpayment of estimated tax. See Payment Options, on Page 8. Worksheet Instructions Line 2: Enter the total of your estimated allowable Connecticut modifications. See instructions for Schedule 1 - Modifications to Federal Adjusted Gross Income (AGI) of Form CT‑1040 or Form CT‑1040NR/PY for information about allowable modifications. Social Security Benefit Adjustment: If your required Connecticut income tax return filing status is single or married filing separately, and you expect your 2026 federal adjusted gross income will be less than $75,000, enter as a subtraction the amount of federally taxable Social Security benefits you expect to report on your 2026 federal Form 1040, Line 6b, or federal Form 1040‑SR, Line 6b. If your required Connecticut income tax return filing status is married filing jointly, qualifying surviving spouse, or head of household, and you expect your federal adjusted gross income will be less than $100,000, enter as a subtraction the amount of federally taxable Social Security benefits you expect to report on your 2026 federal Form 1040, Line 6b, or federal Form 1040‑SR, Line 6b. If you expect your federal adjusted gross income will be above the threshold for your filing status, complete the Social Security Benefit Adjustment Worksheet on Page 4 and include the amount from Line F on Line 2. Line 3: Nonresidents and Part-Year Residents Only: If your Connecticut‑sourced income is greater than your Connecticut adjusted gross income, enter your Connecticut‑sourced income on this line. Line 5: Apportionment Factor: Nonresidents and part‑year residents, if your Connecticut‑sourced income is greater than or equal to your Connecticut adjusted gross income, enter 1.0000. If your Connecticut‑sourced income is less than your Connecticut adjusted gross income, complete the following calculation and enter the result on Line 5. = Line 5

Connecticut-Sourced Income Connecticut Adjusted Gross Income (Line 3) Do not enter a number that is less than zero or greater than 1. If the result is less than zero, enter “0”; if greater than 1 enter 1.0000. Round to four decimal places. Line 7: Residents and Part-Year Residents Only: Enter the estimated allowable credit for income taxes paid to qualifying jurisdictions. Enter “0,” if not applicable. See instructions for Schedule 2 - Credit for Income Taxes Paid to Qualifying Jurisdictions on Form CT‑1040 or Form CT‑1040NR/PY. Line 9: If you expect to owe federal alternative minimum tax for the 2026 taxable year, you may also owe Connecticut alternative minimum tax. Enter your estimated Connecticut alternative minimum tax liability. See instructions for Form CT‑6251, Connecticut Alternative Minimum Tax Return - Individuals. Line 11: Enter estimated allowable Connecticut income tax credit(s). Enter “0” if you are not entitled to a credit. (Credit for a prior year alternative minimum tax is not allowed if you entered an amount on Line 9.) See instructions for Schedule CT‑IT Credit, Income Tax Credit Summary. Do not include any PE Tax Credit on this line.

Tax Calculation Schedule 1. Enter Connecticut AGI from 2026 Estimated Connecticut Income Tax Worksheet, Line 3.......................1. .00 2. Enter the exemption amount from Table A, Personal Exemptions. If zero, enter “0.”...............................2. .00 3. Connecticut Taxable Income: Subtract Line 2 from Line 1. If less than zero, enter “0.”........................3. .00 4. Enter amount from Table B, Initial Tax Calculation....................................................................................4. .00 5. Enter the phase-out amount from Table C, 2% Phase-Out Add-Back. If zero, enter “0.”..........................5. .00 6. Enter the recapture amount from Table D, Tax Recapture. If zero, enter “0.”...........................................6. .00 7. Add Lines 4, 5, and 6..................................................................................................................................7. .00 8. Enter the decimal amount from Table E, Personal Tax Credits. If zero, enter “0.”....................................8. 9. Multiply the amount on Line 7 by the decimal amount on Line 8...............................................................9. .00 10. Connecticut Income Tax: Subtract Line 9 from Line 7. Enter here and on 2026 Estimated

Connecticut Income Tax Worksheet, Line 4.............................................................................................10. .00 1. Federal adjusted gross income you expect in the 2026 taxable year

(from 2026 federal Form 1040ES, 2026 Estimated Tax Worksheet, Line 1). ..........................................1. 2. Allowable Connecticut modifications: Additions or subtractions (to your AGI). See instructions. ............2. 3. Connecticut adjusted gross income: Combine Line 1 and Line 2. ..........................................................3. Nonresidents and part-year residents: Enter your Connecticut‑sourced income if greater than your Connecticut adjusted gross income. 4. Connecticut income tax: Complete the Tax Calculation Schedule below. ...............................................4. 5. Apportionment factor: Connecticut residents enter 1.0000. Nonresidents and part‑year residents,

see Page 2. ..............................................................................................................................................5. 6. Multiply Line 5 by Line 4. .........................................................................................................................6. 7. Credit for income taxes paid to qualifying jurisdictions: See instructions. ...............................................7. 8. Subtract Line 7 from Line 6. ....................................................................................................................8. 9. Estimated Connecticut alternative minimum tax: See instructions. .........................................................9. 10. Add Line 8 and Line 9. ..........................................................................................................................10. 11. Estimated allowable credit(s) from Schedule CT‑IT Credit: See instructions. .......................................11. 12. Total estimated income tax: Subtract Line 11 from Line 10. ..................................................................12. 13. Multiply Line 12 by 90% (662/3% for farmers and fishermen). ...............................................................13. 14. Enter 100% of the income tax shown on your 2025 Connecticut income tax return. See instructions. ........14. 15. Enter the lesser of Line 13 or Line 14. If Line 14 is blank, enter the amount from Line 13.

This is your required annual payment. See caution below. ..............................................................15. Caution: Generally, you may owe interest if you do not prepay (through timely estimates, withholding, pass-through entity tax credit, or all) the lesser of 100% of the income tax shown on your 2025 Connecticut income tax return or 90% of the income tax shown on your 2026 Connecticut income tax return. To avoid interest charges, make sure your estimate is as accurate as possible. You may prefer to pay 100% of the income tax shown on your 2025 Connecticut income tax return. 16. Connecticut income tax withheld or expected to be withheld during the 2026 taxable year. ................16. 16a. Estimated PE Tax Credit for taxable year 2026. ..................................................................................16a. 17. Subtract Lines 16 and 16a from Line 15. If zero (“0”) or less, no estimated payment is required. Or,

Subtract Lines 16 and 16a from Line 12. If less than $1,000, no estimated payment is required. .................17. 18. Installment amount. ...............................................................................................................................18. 19. Multiply Line 17 by Line 18. Pay this amount for each installment. .......................................................19. 2026 Estimated Connecticut Income Tax Worksheet 25 Form CT-1040ES (Rev. 01/26) Page 3 of 8 . .

Social Security Benefit Adjustment Worksheet ** To obtain federal Publication 505, visit the IRS website at www.irs.gov or call the IRS at 800‑829‑3676. Enter the amount you expect to enter on Form CT‑1040 or Form CT‑1040NR/PY, Line 1............................. .00 If your filing status is single or married filing separately, is the amount on Line 1 $75,000 or more?

Yes: Complete this worksheet.

No: Do not complete this worksheet. * If your filing status is married filing jointly, qualifying surviving spouse, or head of household, is the amount on Line 1 $100,000 or more?

Yes: Complete this worksheet.

No: Do not complete this worksheet. * *If you answered No to either question, enter as a subtraction modification on the 2026 Estimated Connecticut Income Tax Worksheet, Line 2, the amount of federally taxable Social Security benefits you expect to report on federal Form 1040, Line 6b, or federal Form 1040-SR, Line 6b. A. Enter the amount you reported on federal Publication 505 **, Tax Withholding and Estimated

Tax, Worksheet 2‑2, Line 1. If Line A is zero or less, stop here. Otherwise, go to Line B. ................. A. B. Enter the amount you reported on federal Publication 505 **, Tax Withholding and Estimated

Tax, Worksheet 2‑2, Line 10. If Line B is zero or less, stop here. Otherwise, go to Line C. ............... B. C. Enter the lesser of Line A or Line B. ................................................................................................... C. D. Multiply Line C by 25% (.25). .............................................................................................................. D. E. Expected taxable amount of Social Security benefits you reported on federal

Publication 505 **, Tax Withholding and Estimated Tax, Worksheet 2‑2, Line 19. ............................. E. F. Social Security benefit adjustment: Subtract Line D from Line E. Enter the amount here

and as a subtraction on the 2026 Estimated Connecticut Income Tax Worksheet, Line 2. If

Line D is greater than or equal to Line E, enter “0.” ............................................................................ F. Form CT-1040ES (Rev. 01/26) Page 4 of 8 Pension and Annuity Worksheet Line 1: Enter the amount you expect to enter on Form CT-1040 or Form CT-1040NR/PY. ............. Line 1. .00 If your filing status is single, married filing separately or head of household, is the amount on Line 1 $75,000 or more?

Yes: Complete this worksheet.

No: Do not complete this worksheet. * If your filing status is married filing jointly, is the amount on Line 1 $100,000 or more?

Yes: Complete this worksheet.

No: Do not complete this worksheet. * * If you answered No to either question and you are an IRA recipient (other than a Roth IRA), enter as a subtraction modification 100% of the amount of such distribution on the 2026 Estimated Connecticut Income Tax Worksheet, Line 2, the amount of IRA distribution reported on federal Form 1040, or federal Form 1040 SR, Line 4b. * If you answered No to either question and you are a pension or annuity recipient (other than an IRA recipient), enter as a subtraction modification on the 2026 Estimated Connecticut Income Tax Worksheet, Line 2, the amount of pension and annuity reported on federal Form 1040 or federal Form 1040 SR, Line 5b. From the amount on Line 5b, subtract military retirement pay, Tier 1 and Tier 2 railroad retirement benefits, and Connecticut teachers' retirement pay. Line 2: Enter 100% of the amount of IRA (other than a Roth IRA), reported on federal Form 1040 or federal Form 1040 SR, Line 4b. Enter 100% of the amount of pensions and annuities reported on federal Form 1040 or federal Form 1040-SR, Line 5b. From the amount on Line 5b, subtract military retirement pay, Tier 1 and Tier 2 railroad retirement benefits, and Connecticut teachers' retirement pay, as applicable. .00 Line 3: Enter the decimal amount from the Pension and Annuity Phase-Out Table on Page 5. Line 4: Multiply Line 2 by Line 3. Enter the amount here and as a subtraction on the 2026 Estimated Connecticut Income Tax Worksheet, Line 2. ................................................................................................................................ Line 2. .................................................................... Line 4. ........ Line 3. .00 .

Form CT-1040ES (Rev. 01/26) Page 5 of 8 Table A - Personal Exemptions for 2026 Taxable Year Enter the exemption amount on the Tax Calculation Schedule, Line 2. Use the filing status you expect to report on your 2026 Connecticut income tax return and your Connecticut AGI* (from Tax Calculation Schedule, Line 1) to determine your exemption. Head of Household $ 0 $30,000 $15,000 $ 0 $48,000 $24,000 $ 0 $24,000 $12,000 $ 0 $38,000 $19,000 $30,000 $31,000 $14,000 $48,000 $49,000 $23,000 $24,000 $25,000 $11,000 $38,000 $39,000 $18,000 $31,000 $32,000 $13,000 $49,000 $50,000 $22,000 $25,000 $26,000 $10,000 $39,000 $40,000 $17,000 $32,000 $33,000 $12,000 $50,000 $51,000 $21,000 $26,000 $27,000 $ 9,000 $40,000 $41,000 $16,000 $33,000 $34,000 $11,000 $51,000 $52,000 $20,000 $27,000 $28,000 $ 8,000 $41,000 $42,000 $15,000 $34,000 $35,000 $10,000 $52,000 $53,000 $19,000 $28,000 $29,000 $ 7,000 $42,000 $43,000 $14,000 $35,000 $36,000 $ 9,000 $53,000 $54,000 $18,000 $29,000 $30,000 $ 6,000 $43,000 $44,000 $13,000 $36,000 $37,000 $ 8,000 $54,000 $55,000 $17,000 $30,000 $31,000 $ 5,000 $44,000 $45,000 $12,000 $37,000 $38,000 $ 7,000 $55,000 $56,000 $16,000 $31,000 $32,000 $ 4,000 $45,000 $46,000 $11,000 $38,000 $39,000 $ 6,000 $56,000 $57,000 $15,000 $32,000 $33,000 $ 3,000 $46,000 $47,000 $10,000 $39,000 $40,000 $ 5,000 $57,000 $58,000 $14,000 $33,000 $34,000 $ 2,000 $47,000 $48,000 $ 9,000 $40,000 $41,000 $ 4,000 $58,000 $59,000 $13,000 $34,000 $35,000 $ 1,000 $48,000 $49,000 $ 8,000 $41,000 $42,000 $ 3,000 $59,000 $60,000 $12,000 $35,000 and up $ 0 $49,000 $50,000 $ 7,000 $42,000 $43,000 $ 2,000 $60,000 $61,000 $11,000

$50,000 $51,000 $ 6,000 $43,000 $44,000 $ 1,000 $61,000 $62,000 $10,000

$51,000 $52,000 $ 5,000 $44,000 and up $ 0 $62,000 $63,000 $ 9,000

$52,000 $53,000 $ 4,000

$63,000 $64,000 $ 8,000

$53,000 $54,000 $ 3,000

$64,000 $65,000 $ 7,000

$54,000 $55,000 $ 2,000

$65,000 $66,000 $ 6,000

$55,000 $56,000 $ 1,000

$66,000 $67,000 $ 5,000

$56,000 and up $ 0

$67,000 $68,000 $ 4,000

$68,000 $69,000 $ 3,000

$69,000 $70,000 $ 2,000

$70,000 $71,000 $ 1,000

$71,000 and up $ 0 Connecticut AGI * Exemption Connecticut AGI * Exemption Connecticut AGI * Exemption Connecticut AGI * Exemption More Than Less Than

More Than Less Than

or Equal To

or Equal To Single Married Filing Jointly or Qualifying Surviving Spouse Married Filing Separately

* Form CT-1040NR/PY filers must use income from Connecticut sources if it exceeds Connecticut adjusted gross income. Single, Married Filing Separately or Head of Household Married Filing Jointly Federal AGI Federal AGI Greater Than or Equal to Less Than or Equal To Greater Than or Equal to Less Than or Equal To $0 $74,999 $75,000 $77,499 $77,500 $79,999 $80,000 $82,499 $82,500 $84,999 $85,000 $87,499 $87,500 $89,999 $90,000 $94,999 $95,000 $99,999 $100,000 and up 1 .85 .70 .55 .40 .25 .10 .05 .025 0 $0 $ 99,999 $100,000 $104,999 $105,000 $109,999 $110,000 $114,999 $115,000 $119,999 $120,000 $124,999 $125,000 $129,999 $130,000 $139,999 $140,000 $149,999 $150,000 and up 1 .85 .70 .55 .40 .25 .10 .05 .025 0 Pension and Annuity Phase-Out Table Phase- Out Phase- Out

Table C - 2% Phase-Out Add-Back Enter the phase-out amount on the Tax Calculation Schedule, Line 5. Use the filing status you expect to report on your 2026 Connecticut income tax return and your Connecticut AGI * (Tax Calculation Schedule, Line 1) to determine your phase-out amount. Form CT-1040ES (Rev. 01/26) Page 6 of 8 Table B - Initial Tax Calculation for 2026 Taxable Year Enter the tax calculation amount on the Tax Calculation Schedule, Line 4 and continue to Line 5. Use the filing status you expect to report on your 2026 Connecticut income tax return. This is the initial tax calculation of your tax liability. It does not include personal tax credits, the 2% phase-out or tax recapture. Single or Married Filing Separately If the amount on Line 3 of the Tax Calculation Schedule is: Less than or equal to:................................................................. $ 10,000.............................. 2.00% More than $10,000, but less than or equal to............................. $ 50,000.............................. $200 plus 4.5% of the excess over $10,000 More than $50,000, but less than or equal to............................. $100,000............................. $2,000 plus 5.5% of the excess over $50,000 More than $100,000, but less than or equal to........................... $200,000............................. $4,750 plus 6.0% of the excess over $100,000 More than $200,000, but less than or equal to........................... $250,000............................. $10,750 plus 6.5% of the excess over $200,000 More than $250,000, but less than or equal to........................... $500,000............................. $14,000 plus 6.9% of the excess over $250,000 More than $500,000................................................................................................................. $31,250 plus 6.99% of the excess over $500,000 Married Filing Jointly/Qualifying Surviving Spouse If the amount on Line 3 of the Tax Calculation Schedule is: Less than or equal to:................................................................. $ 20,000.............................. 2.00% More than $20,000, but less than or equal to............................. $100,000............................. $400 plus 4.5% of the excess over $20,000 More than $100,000, but less than or equal to........................... $200,000............................. $4,000 plus 5.5% of the excess over $100,000 More than $200,000, but less than or equal to........................... $400,000............................. $9,500 plus 6.0% of the excess over $200,000 More than $400,000, but less than or equal to........................... $500,000............................. $21,500 plus 6.5% of the excess over $400,000 More than $500,000, but less than or equal to........................... $1,000,000.......................... $28,000 plus 6.9% of the excess over $500,000 More than $1,000,000.............................................................................................................. $62,500 plus 6.99% of the excess over $1,000,000 Head of Household If the amount on Line 3 of the Tax Calculation Schedule is: Less than or equal to:................................................................. $ 16,000.............................. 2.00% More than $16,000, but less than or equal to............................. $ 80,000.............................. $320 plus 4.5% of the excess over $16,000 More than $80,000, but less than or equal to............................. $160,000............................. $3,200 plus 5.5% of the excess over $80,000 More than $160,000, but less than or equal to........................... $320,000............................. $7,600 plus 6.0% of the excess over $160,000 More than $320,000, but less than or equal to........................... $400,000............................. $17,200 plus 6.5% of the excess over $320,000 More than $400,000, but less than or equal to........................... $800,000............................. $22,400 plus 6.9% of the excess over $400,000 More than $800,000................................................................................................................. $50,000 plus 6.99% of the excess over $800,000

Line 3 is $13,000, Line 4 is $335

$13,000 - $10,000 = $3,000

$3,000 X .045 = $135

$200 + $135 = $335

Line 3 is $525,000, Line 4 is $32,998

$525,000 - $500,000 = $25,000

$25,000 x .0699 = $1,748

$31,250 + $1,748 = $32,998 Single or Married Filing Separately Examples:

Line 3 is $22,500, Line 4 is $513

$22,500 - $20,000 = $2,500

$2,500 x .045 = $113

$400 + $113 = $513

Line 3 is $1,100,000, Line 4 is $69,490

$1,100,000 - $1,000,000 = $100,000

$100,000 x .0699 = $6,990

$62,500 + $6,990 = $69,490 Married Filing Jointly/Qualifying Surviving Spouse Examples:

Line 3 is $20,000, Line 4 is $500

$20,000 - $16,000 = $4,000

$4,000 x .045 = $180

$320 + $180 = $500

Line 3 is $825,000, Line 4 is $51,748

$825,000 - $800,000 = $25,000

$25,000 x .0699 = $1,748

$50,000 + $1,748 = $51,748 Head of Household Examples: $ 0 $ 56,500 $ 0 $ 0 $100,500 $ 0 $ 0 $50,250 $ 0 $ 0 $ 78,500 $ 0 $ 56,500 $ 61,500 $ 25 $100,500 $105,500 $ 50 $50,250 $52,750 $ 25 $ 78,500 $ 82,500 $ 40 $ 61,500 $ 66,500 $ 50 $105,500 $110,500 $100 $52,750 $55,250 $ 50 $ 82,500 $ 86,500 $ 80 $ 66,500 $ 71,500 $ 75 $110,500 $115,500 $150 $55,250 $57,750 $ 75 $ 86,500 $ 90,500 $120 $ 71,500 $ 76,500 $100 $115,500 $120,500 $200 $57,750 $60,250 $100 $ 90,500 $ 94,500 $160 $ 76,500 $ 81,500 $125 $120,500 $125,500 $250 $60,250 $62,750 $125 $ 94,500 $ 98,500 $200 $ 81,500 $ 86,500 $150 $125,500 $130,500 $300 $62,750 $65,250 $150 $ 98,500 $102,500 $240 $ 86,500 $ 91,500 $175 $130,500 $135,500 $350 $65,250 $67,750 $175 $102,500 $106,500 $280 $ 91,500 $ 96,500 $200 $135,500 $140,500 $400 $67,750 $70,250 $200 $106,500 $110,500 $320 $ 96,500 $101,500 $225 $140,500 $145,500 $450 $70,250 $72,750 $225 $110,500 $114,500 $360 $101,500 and up $250 $145,500 and up $500 $72,750 and up $250 $114,500 and up $400

Connecticut AGI * 2% Connecticut AGI * 2% Connecticut AGI * 2% Connecticut AGI * 2% More Than Less Than Phase-Out More Than Less Than Phase-Out More Than Less Than Phase-Out More Than Less Than Phase-Out

or Equal To Add-Back

or Equal To Add-Back Married Filing Jointly or Qualifying Surviving Spouse * Form CT-1040NR/PY filers must use income from Connecticut sources if it exceeds Connecticut adjusted gross income. Married Filing Separately Head of Household Single

Form CT-1040ES (Rev. 01/26) Page 7 of 8 Single or Married Filing Separately Married Filing Jointly or Qualifying Surviving Spouse Head of Household Connecticut AGI * Connecticut AGI * Connecticut AGI * Recapture Amount Recapture Amount Recapture Amount More Than Less Than or Equal To More Than Less Than or Equal To More Than Less Than or Equal To Table D - Tax Recapture Enter the recapture amount on the Tax Calculation Schedule, Line 6. Use the filing status you expect to report on your 2026 Connecticut income tax return and your Connecticut AGI * (Tax Calculation Schedule, Line 1) to determine your recapture amount.

$ 0 $105,000 $ 0 $ 0 $210,000 $ 0 $ 0 $168,000 $ 0 $105,000 $110,000 $ 25 $210,000 $220,000 $ 50 $168,000 $176,000 $ 40 $110,000 $115,000 $ 50 $220,000 $230,000 $ 100 $176,000 $184,000 $ 80 $115,000 $120,000 $ 75 $230,000 $240,000 $ 150 $184,000 $192,000 $ 120 $120,000 $125,000 $ 100 $240,000 $250,000 $ 200 $192,000 $200,000 $ 160 $125,000 $130,000 $ 125 $250,000 $260,000 $ 250 $200,000 $208,000 $ 200 $130,000 $135,000 $ 150 $260,000 $270,000 $ 300 $208,000 $216,000 $ 240 $135,000 $140,000 $ 175 $270,000 $280,000 $ 350 $216,000 $224,000 $ 280 $140,000 $145,000 $ 200 $280,000 $290,000 $ 400 $224,000 $232,000 $ 320 $145,000 $150,000 $ 225 $290,000 $300,000 $ 450 $232,000 $240,000 $ 360 $150,000 $200,000 $ 250 $300,000 $400,000 $ 500 $240,000 $320,000 $ 400 $200,000 $205,000 $ 340 $400,000 $410,000 $ 680 $320,000 $328,000 $ 540 $205,000 $210,000 $ 430 $410,000 $420,000 $ 860 $328,000 $336,000 $ 680 $210,000 $215,000 $ 520 $420,000 $430,000 $1,040 $336,000 $344,000 $ 820 $215,000 $220,000 $ 610 $430,000 $440,000 $1,220 $344,000 $352,000 $ 960 $220,000 $225,000 $ 700 $440,000 $450,000 $1,400 $352,000 $360,000 $1,100 $225,000 $230,000 $ 790 $450,000 $460,000 $1,580 $360,000 $368,000 $1,240 $230,000 $235,000 $ 880 $460,000 $470,000 $1,760 $368,000 $376,000 $1,380 $235,000 $240,000 $ 970 $470,000 $480,000 $1,940 $376,000 $384,000 $1,520 $240,000 $245,000 $1,060 $480,000 $490,000 $2,120 $384,000 $392,000 $1,660 $245,000 $250,000 $1,150 $490,000 $500,000 $2,300 $392,000 $400,000 $1,800 $250,000 $255,000 $1,240 $500,000 $510,000 $2,480 $400,000 $408,000 $1,940 $255,000 $260,000 $1,330 $510,000 $520,000 $2,660 $408,000 $416,000 $2,080 $260,000 $265,000 $1,420 $520,000 $530,000 $2,840 $416,000 $424,000 $2,220 $265,000 $270,000 $1,510 $530,000 $540,000 $3,020 $424,000 $432,000 $2,360 $270,000 $275,000 $1,600 $540,000 $550,000 $3,200 $432,000 $440,000 $2,500 $275,000 $280,000 $1,690 $550,000 $560,000 $3,380 $440,000 $448,000 $2,640 $280,000 $285,000 $1,780 $560,000 $570,000 $3,560 $448,000 $456,000 $2,780 $285,000 $290,000 $1,870 $570,000 $580,000 $3,740 $456,000 $464,000 $2,920 $290,000 $295,000 $1,960 $580,000 $590,000 $3,920 $464,000 $472,000 $3,060 $295,000 $300,000 $2,050 $590,000 $600,000 $4,100 $472,000 $480,000 $3,200 $300,000 $305,000 $2,140 $600,000 $610,000 $4,280 $480,000 $488,000 $3,340 $305,000 $310,000 $2,230 $610,000 $620,000 $4,460 $488,000 $496,000 $3,480 $310,000 $315,000 $2,320 $620,000 $630,000 $4,640 $496,000 $504,000 $3,620 $315,000 $320,000 $2,410 $630,000 $640,000 $4,820 $504,000 $512,000 $3,760 $320,000 $325,000 $2,500 $640,000 $650,000 $5,000 $512,000 $520,000 $3,900 $325,000 $330,000 $2,590 $650,000 $660,000 $5,180 $520,000 $528,000 $4,040 $330,000 $335,000 $2,680 $660,000 $670,000 $5,360 $528,000 $536,000 $4,180 $335,000 $340,000 $2,770 $670,000 $680,000 $5,540 $536,000 $544,000 $4,320 $340,000 $345,000 $2,860 $680,000 $690,000 $5,720 $544,000 $552,000 $4,460 $345,000 $500,000 $2,950 $690,000 $1,000,000 $5,900 $552,000 $800,000 $4,600 $500,000 $505,000 $3,000 $1,000,000 $1,010,000 $6,000 $800,000 $808,000 $4,680 $505,000 $510,000 $3,050 $1,010,000 $1,020,000 $6,100 $808,000 $816,000 $4,760 $510,000 $515,000 $3,100 $1,020,000 $1,030,000 $6,200 $816,000 $824,000 $4,840 $515,000 $520,000 $3,150 $1,030,000 $1,040,000 $6,300 $824,000 $832,000 $4,920 $520,000 $525,000 $3,200 $1,040,000 $1,050,000 $6,400 $832,000 $840,000 $5,000 $525,000 $530,000 $3,250 $1,050,000 $1,060,000 $6,500 $840,000 $848,000 $5,080 $530,000 $535,000 $3,300 $1,060,000 $1,070,000 $6,600 $848,000 $856,000 $5,160 $535,000 $540,000 $3,350 $1,070,000 $1,080,000 $6,700 $856,000 $864,000 $5,240 $540,000 and up $3,400 $1,080,000 and up $6,800 $864,000 and up $5,320 * Form CT-1040NR/PY filers must use income from Connecticut sources if it exceeds Connecticut adjusted gross income.

Table E - Personal Tax Credits for 2026 Taxable Year Enter the decimal amount on the Tax Calculation Schedule, Line 8. Use the filing status you expect to report on your 2026 Connecticut income tax return and your Connecticut AGI * (Tax Calculation Schedule, Line 1) to determine your decimal amount. * Form CT-1040NR/PY filers must use income from Connecticut sources if it exceeds Connecticut adjusted gross income. Head of Household Single Married Filing Jointly or Qualifying Surviving Spouse Married Filing Separately

Connecticut AGI* Decimal Connecticut AGI* Decimal Connecticut AGI* Decimal Connecticut AGI* Decimal More Than Less Than Amount More Than Less Than Amount More Than Less Than Amount More Than Less Than Amount

or Equal To

$15,000 $18,800 .75 $24,000 $30,000 .75 $12,000 $15,000 .75 $19,000 $24,000 .75

$18,800 $19,300 .70 $30,000 $30,500 .70 $15,000 $15,500 .70 $24,000 $24,500 .70

$19,300 $19,800 .65 $30,500 $31,000 .65 $15,500 $16,000 .65 $24,500 $25,000 .65

$19,800 $20,300 .60 $31,000 $31,500 .60 $16,000 $16,500 .60 $25,000 $25,500 .60

$20,300 $20,800 .55 $31,500 $32,000 .55 $16,500 $17,000 .55 $25,500 $26,000 .55

$20,800 $21,300 .50 $32,000 $32,500 .50 $17,000 $17,500 .50 $26,000 $26,500 .50

$21,300 $21,800 .45 $32,500 $33,000 .45 $17,500 $18,000 .45 $26,500 $27,000 .45

$21,800 $22,300 .40 $33,000 $33,500 .40 $18,000 $18,500 .40 $27,000 $27,500 .40

$22,300 $25,000 .35 $33,500 $40,000 .35 $18,500 $20,000 .35 $27,500 $34,000 .35

$25,000 $25,500 .30 $40,000 $40,500 .30 $20,000 $20,500 .30 $34,000 $34,500 .30

$25,500 $26,000 .25 $40,500 $41,000 .25 $20,500 $21,000 .25 $34,500 $35,000 .25

$26,000 $26,500 .20 $41,000 $41,500 .20 $21,000 $21,500 .20 $35,000 $35,500 .20

$26,500 $31,300 .15 $41,500 $50,000 .15 $21,500 $25,000 .15 $35,500 $44,000 .15

$31,300 $31,800 .14 $50,000 $50,500 .14 $25,000 $25,500 .14 $44,000 $44,500 .14

$31,800 $32,300 .13 $50,500 $51,000 .13 $25,500 $26,000 .13 $44,500 $45,000 .13

$32,300 $32,800 .12 $51,000 $51,500 .12 $26,000 $26,500 .12 $45,000 $45,500 .12

$32,800 $33,300 .11 $51,500 $52,000 .11 $26,500 $27,000 .11 $45,500 $46,000 .11

$33,300 $60,000 .10 $52,000 $96,000 .10 $27,000 $48,000 .10 $46,000 $74,000 .10

$60,000 $60,500 .09 $96,000 $96,500 .09 $48,000 $48,500 .09 $74,000 $74,500 .09

$60,500 $61,000 .08 $96,500 $97,000 .08 $48,500 $49,000 .08 $74,500 $75,000 .08

$61,000 $61,500 .07 $97,000 $97,500 .07 $49,000 $49,500 .07 $75,000 $75,500 .07

$61,500 $62,000 .06 $97,500 $98,000 .06 $49,500 $50,000 .06 $75,500 $76,000 .06

$62,000 $62,500 .05 $98,000 $98,500 .05 $50,000 $50,500 .05 $76,000 $76,500 .05

$62,500 $63,000 .04 $98,500 $99,000 .04 $50,500 $51,000 .04 $76,500 $77,000 .04

$63,000 $63,500 .03 $99,000 $99,500 .03 $51,000 $51,500 .03 $77,000 $77,500 .03

$63,500 $64,000 .02 $99,500 $100,000 .02 $51,500 $52,000 .02 $77,500 $78,000 .02

$64,000 $64,500 .01 $100,000 $100 ,500 .01 $52,000 $52,500 .01 $78,000 $78,500 .01

$64,500 and up .00 $100,500 and up .00 $52,500 and up .00 $78,500 and up .00 Form CT-1040ES (Rev. 01/26) Page 8 of 8 Line 14: If your 2025 Connecticut income tax return covered a 12‑month period, enter 100% of the income tax shown on your return (from Form CT‑1040, Line 14, or Form CT‑1040NR/PY, Line 16). If you were a resident during the 2025 taxable year and you did not file a 2025 Connecticut income tax return because you had no Connecticut income tax liability, enter “0.” If you were a nonresident or part‑year resident during the 2025 taxable year with Connecticut‑sourced income and you did not file a 2025 Connecticut income tax return because you had no Connecticut income tax liability, enter “0.” All other taxpayers must leave Line 14 blank. Line 16a: Enter the estimated PE Tax Credit. You may receive a PE Tax Credit if you are a member or a shareholder of a pass‑through entity subject to the Connecticut Pass‑Through Entity Tax, or if you are a beneficiary of a trust or estate that is a member or a shareholder of a pass‑through entity subject to the Connecticut Pass‑Through Entity Tax. The PE Tax Credit will be reported to you on Schedule CT K‑1 or on Schedule CT‑1041 K‑1. Payment Options Visit the DRS website at portal.ct.gov/DRS-myconneCT to pay your Connecticut estimated taxes electronically. Pay by Credit Card

or Debit Card Pay Electronically: Electronic payments can be made through our online portal called myconneCT at portal.ct.gov/DRS-myconneCT. 1. Pay by ACH Debit/Direct Payment: Using this option authorizes DRS to electronically withdraw a payment from your bank account (checking or savings) on a date you select up to the due date. There is no fee to pay by ACH debit. 2. Pay by Credit Card or Debit Card: You may elect to pay your tax liability using a credit card (American Express®, Discover®, Master Card®, Visa®) or comparable debit card. A convenience fee will be charged by the credit card service provider. You will be informed of the amount of the fee and may elect to cancel the transaction. Your payment will be effective on the date that you make the charge. At the end of the transaction, you will receive a confirmation number for your records. As a reminder, even if you pay electronically, you must still file your return by the due date. Tax not paid on or before the due date will be subject to penalty and interest. Do not mail Form CT‑1040ES if you make your payment by credit card or debit card. Pay by Mail Make your check payable to Commissioner of Revenue Services. To ensure your payment is applied to your account, write “2026 Form CT‑1040ES” and your Social Security Number (SSN), optional, on the front of your check. Be sure to sign your check and paper clip it to the front of the coupon. Do not send cash. DRS may submit your check to your bank electronically. Completing the Payment Coupon: Complete all required taxpayer identification information in blue or black ink only. Enter the payment amount where indicated on the coupon. In determining your payment amount, you may subtract from your installment amount any available overpayment of 2025 income tax. If you file this coupon, DRS will mail you personalized, preprinted coupons for the remaining quarters of the 2026 taxable year.