YOUR HOUSEHOLD. ON TRACK.
Owed Too Much Last Year?
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2026 Federal Tax Withholding Calculator
Estimate your household tax gap. Compare extra withholding from wages and pensions.
1 Choose your starting point
Help with last year’s numbers
Use last year’s full-year amounts from your return or income statements, separately for each source. Enter taxable wages and pension amounts; use gross Social Security-equivalent benefits. Do not enter total AGI again as another income source.
Add or subtract expected changes for raises, retirement, a new job, or benefits. Then enter this year’s income and federal withholding so far, remaining payment count, and current withholding per future payment. The calculator spreads the remaining expected income evenly over those payments.
Use 0 for last year’s income when adding a new source. Recheck this year’s deductions, credits, filing status, and ages. Last year’s refund, balance due, and withholding are not copied into this year. No tax-return upload is needed.
New here? See an example household with one working spouse and one retiree receiving pension income and benefits. Sample figures replace your current entries.
Sample figures loaded — these are fictional, not your personal estimate. Explore the split options, then choose Reset everything to enter your own figures.
2 Add your household income
Include your spouse if you file together.
Available tax years: 2025 and 2026. Additional years will appear after their rules are reviewed and tested. This calculator supports single and joint filers with ordinary income.
Income & tax taken out
Use your latest statements. Enter income before tax, not your bank deposit. Count only payments still expected after that statement.
Deductions, credits & other payments Optional
Enter eligible annual amounts only. Don’t repeat payroll deductions already excluded from taxable wages. Standard and eligible senior deductions are calculated automatically. Credit eligibility and other deductions require your own calculation.
Use a tax estimate from your preparer
For business income, capital gains, refundable credits, AMT or other complex situations, enter a complete annual federal tax estimate. This replaces our income-tax calculation; the withholding comparison still works.
How to use the withholding calculator
Start with your latest pay stubs and retirement statements. For married filing jointly, include both spouses.
A quick walkthrough
- Add each income source. Enter federal taxable wages or taxable pension income, federal income tax already withheld, and payments still expected. Enter gross Social Security-equivalent benefits separately.
- Review your projected balance. Compare estimated federal tax with payments already made and expected for the rest of the selected year.
- Choose your extra withholding split. Use one eligible source, equal shares, annual-income shares, custom percentages, or extra dollars per payment.
- Check the next statement. The result is extra withholding above the amount you entered. Allow time for changes to take effect and recalculate with updated figures.
A simple example: closing a $1,200 gap
Imagine a household has a projected $1,200 shortfall and two eligible income sources, each with six payments remaining. An equal split adds $100 to each source per payment. A 70% / 30% split adds $140 to one and $60 to the other.
Both choices collect $1,200 in total. Different remaining payment counts change the amount needed per payment. This illustration explains allocation only; it is not a tax-liability calculation.
Common withholding questions
Why might we owe tax when both spouses have withholding?
Separate withholding elections may not fully account for your combined household income. Compare both spouses’ income and federal withholding together when planning a joint return. For official guidance, use the IRS Tax Withholding Estimator.
Can I compare extra withholding from wages and pensions?
Yes. Add separate income rows, then choose how to allocate additional withholding across eligible wage and pension payments. Percentages here split your projected gap; they are not withholding rates to enter on a tax form.
Can I enter last year’s information?
Yes. Select 2025 to review last year using full-year income and withholding totals. This is a limited estimate, not a recreation of your filed return; IRS tax-table rounding and unsupported items can produce differences. To plan this year using last year’s income as a baseline, choose the current tax year and “Use last year’s tax return or income statements.” Update expected changes and current withholding. State/local taxes and underpayment penalties are not calculated. See the full calculation limits.
Can I use this calculator in future tax years?
Only use it for the tax year shown. Choose the year your income belongs to, not the year you file your return. The selector currently offers 2025 and 2026. Future years require updated, verified tax rules; changing the calendar does not update the calculation. Revisit your withholding when a verified version for the new year is available.
What this estimate includes
Year-specific federal ordinary income brackets, standard deductions, age-65 additions, enhanced senior deduction phaseouts, and basic Social Security-equivalent benefit taxability. Pension rows use the taxable amount you supply. No state tax, self-employment tax, preferential capital-gains rates, AMT, investment surtaxes, Additional Medicare Tax, credit eligibility, lump-sum benefit adjustments, or underpayment penalty calculation is included. This is a planning estimate, not a filed return. Unsupported situations need a complete preparer estimate above.
Railroad: enter SSEB from RRB-1099 as a benefit row and taxable pension-type components from RRB-1099-R separately. Do not assume all Tier I is SSEB. Use current statements if the split has changed. W-4V uses permitted percentages; this version allocates extra dollars only to wages or pension-type payments.
Rules checked October 10, 2026. Income figures are not saved or submitted by this calculator. Closing or reloading clears them.