How to use this calculator

How to Use This Calculator

Our Form 1040 SR 2026 tax forecast tool is based on the IRS draft version of the 2025 Form 1040-SR. While major changes are unlikely, the IRS sometimes updates line numbers or instructions when the final forms are released each January. Please download the newest version after mid-January to ensure no line items or amounts have been revised.

Important: If the IRS updates Form 1040-SR or its related worksheets, we will revise this calculator to match the final version.

What This Calculator Helps You Do

The primary purpose of this calculator is to help you determine how much money you can withdraw from tax-advantaged retirement accounts (IRA, 401(k), 403(b), TSP, etc.) before you trigger any federal income tax liability.

Even if you do owe some tax, the first two tax brackets remain relatively low thanks to the 2017 Tax Cuts and Jobs Act and the later “Big Beautiful Bill” that extended those benefits.

Includes Social Security Taxation

Up to 85% of your Social Security benefits may be taxable depending on your total income. This calculator includes the official worksheet— Social Security Taxable Benefits Calculation—to determine how much of your benefits are taxable.

You will need figures from:
  • Form 1040 or 1040-SR
  • Schedule 1 (adjustments and additional income)
  • Your SSA-1099 (Social Security benefits)
  • Pension or annuity income
  • IRA distributions
  • Interest, dividends, capital gains, and other income

If You’re Over 65

You may also qualify for a large additional deduction from Schedule 1-A, one of the biggest senior benefits preserved in the Big Beautiful Bill.

– The amount from Schedule 1-A, line 38 goes into Form 1040-SR, line 13b.
– Your main standard deduction appears on line 12e.

How to Use This Calculator

  • Enter your estimated income numbers into each field.
  • The calculator will automatically compute:
    • Total income
    • Adjusted gross income (AGI)
    • Total deductions
    • Taxable income
    • Credits and payments
    • Refund or amount owed
    • Taxable portion of Social Security benefits
  • Adjust your planned retirement withdrawals and see how the tax result changes.
  • Use this to determine how much you can take from tax-deferred accounts without triggering unnecessary tax.

Federal 1040-SR Style Summary (Estimate)

Adjusted Gross Income (AGI)
$0
Taxable Income
$0
Total Tax
$0
Total Payments & Credits
$0
Refund (if any)
$0
Amount You Owe (if any)
$0
This tool is for planning only. It is not official IRS software and does not file your return.

Income & Adjusted Gross Income (Lines 1–11)

1a
Wages, salaries, tips (Form W-2, box 1)
1b
Household employee wages not on a W-2
1c
Taxable tips not reported in 1a
1d
Medicaid waiver payments
1e
Taxable dependent care benefits
1f
Employer adoption benefits
1g
Wages from Form 8919
1h
Other earned income
1z
Total wages and other income (add lines 1a–1h)
2b
Taxable interest income
3b
Ordinary dividends
4b
Taxable IRA distributions
5b
Taxable pensions and annuities
6b
Taxable Social Security benefits
7a
Capital gain or (loss)
8
Other income (Schedule 1, line 10)
9
Total income (add 1z, 2b, 3b, 4b, 5b, 6b, 7a, 8)
10
Adjustments to income (Schedule 1, line 26)
11a
Adjusted gross income (AGI) (line 9 − line 10)
11b
Same as line 11a (for reference)

Deductions, Tax & Total Tax (Lines 12–24)

12e
Standard or itemized deductions
13a
Qualified business income (QBI) deduction
13b
Other deductions
14
Total deductions (12e + 13a + 13b)
15
Taxable income (11b − 14, not below 0)
16
Tax from tables/worksheets
17
Schedule 2, line 3
18
Tax before credits (16 + 17)
19
Child tax credit & credit for other dependents
20
Other nonrefundable credits
21
Total nonrefundable credits (19 + 20)
22
Tax after credits (18 − 21, not below 0)
23
Other taxes (Schedule 2, line 21)
24
Total tax (22 + 23)

Payments, Refund & Amount You Owe (Lines 25–38)

25a
Federal income tax withheld (Forms W-2)
25b
Federal income tax withheld (Forms 1099)
25c
Other federal withholding
25d
Total withholding (25a + 25b + 25c)
26
2025 estimated tax payments & amount applied
27a
Earned income credit (EIC)
28
Additional child tax credit
29
American opportunity credit
30
Refundable adoption credit
31
Other refundable credits
32
Total other payments & refundable credits (27a + 28 + 29 + 30 + 31)
33
Total payments (25d + 26 + 32)
34
Overpayment (if line 33 > line 24)
35a
Amount of line 34 to be refunded
36
Amount of line 34 applied to 2026 estimated tax
37
Amount you owe (if line 24 > line 33)
38
Estimated tax penalty (if any)

Social Security Taxable Benefits Workout

Worksheet 1. Figuring Your Taxable Social Security Benefits

This tool is for planning only. It is not official IRS software and does not file or store your tax return.
Threshold amounts used in lines 9 and 11 are based on your selection above.
Line Description Amount
1. Enter the total amount from box 5 of all your Forms SSA-1099 and RRB-1099.
2. Multiply line 1 by 50% (0.50).
3. Combine the amounts from Form 1040 or 1040-SR, income lines (wages, interest, dividends, etc.).
4. Enter the amount, if any, from Form 1040 or 1040-SR, line 2a (tax-exempt interest).
5. Enter the total of any exclusions/adjustments (for example, adoption benefits, foreign earned income, or income of bona fide residents of certain U.S. territories).
6. Combine lines 2, 3, 4, and 5.
7. Enter the total of the amounts from Schedule 1 (Form 1040), lines 11 through 20, and 23 and 25.
8. Is the amount on line 7 less than the amount on line 6? If Yes, subtract line 7 from line 6 and enter the result here. If No, none of your social security benefits are taxable.
9. Threshold amount based on your filing status (generally $32,000 for married filing jointly, or $25,000 for the other statuses shown above).
10. Is the amount on line 9 less than the amount on line 8? If Yes, subtract line 9 from line 8 and enter the result here. If No, none of your benefits are taxable.
11. Threshold #2 based on your filing status (generally $12,000 if married filing jointly, or $9,000 for the other statuses shown above).
12. Subtract line 11 from line 10. If zero or less, enter 0.
13. Enter the smaller of line 10 or line 11.
14. Multiply line 13 by 50% (0.50).
15. Enter the smaller of line 2 or line 14.
16. Multiply line 12 by 85% (0.85). If line 12 is zero, enter 0.
17. Add lines 15 and 16.
18. Multiply line 1 by 85% (0.85).
19. Taxable benefits. Enter the smaller of line 17 or line 18.
For married filing separately and lived with your spouse at any time during the year, special rules apply. This worksheet follows the IRS percentages (50% and 85%) but does not replace the official instructions.

Enter the amount on line 19 above on line 6A in the 1040 SR worksheet at the top of the page

Schedule 1A for form 1040 2026

2025 schedule A for Senior deduction

Complete this part of Schedule 1-A above to determine if you qualify for the new Enhanced Deduction just for Seniors. Most seniors do not need to complete more than this part of the form. Attached is a draft of the entire form. If you do, copy the amount in box 38 and paste it into box 6a in the 1040 SR above.

If you want to see the entire Schedule 1-A form you can download it below by clicking the button.

2025 Schedule A 1040Schedule 1A 2025 1040

IRS Form 1040 SR 2025 Draft

Click on this button to download the full form 1040 SR to compare with the data entry version above.

1040 SR 2025

IRS Form Schedule A

Click on the button below to see the full IRS Schedule A form for 2025.

Schedule A 2025
Disclaimer ▶

This calculator and all related tools provided on RetireCoast are for informational and educational purposes only. They are not intended to replace professional tax, legal, or financial advice.

While we make every effort to provide accurate and up-to-date calculations, RetireCoast does not guarantee the accuracy, completeness, or timeliness of any results, estimates, or tax projections shown above. Tax laws, IRS forms, and instructions can change without notice, and mistakes can happen.

Users are fully responsible for verifying all numbers and results before filing any federal or state tax returns. You should confirm your entries using the official IRS forms and instructions, or by working with a qualified tax professional, CPA, or financial advisor.

By using this tool, you acknowledge and agree that RetireCoast is not responsible for any errors, omissions, penalties, interest, additional tax, financial loss, or other consequences arising from the use of this calculator or reliance on its output.

You further agree that you accept full responsibility for how you use these tools and the data they generate, including any tax filings, financial planning decisions, or withdrawal strategies based on the results.

This is not official IRS software and does not file or transmit your tax return.

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