Social Security Tax Calculator 2026
How much of your Social Security is taxable in 2026 — provisional income against the $25,000 / $32,000 and $34,000 / $44,000 thresholds, the 50% and 85% tiers, the $6,000 senior deduction, federal tax owed and the effective rate on your next IRA dollar.
| Provisional (combined) income | — |
|---|---|
| Thresholds for your status | — |
| Taxable share | — |
| Standard deduction incl. age/blind additions | — |
| Senior deduction (2025–2028) | — |
| Taxable income | — |
| Federal tax | — |
| Tax attributable to Social Security | — |
| Marginal rate on the next $1,000 of IRA withdrawal | — |
In short
Up to 50% of Social Security is taxable when provisional income (AGI + tax-exempt interest + half of benefits) exceeds $25,000 single / $32,000 joint, and up to 85% above $34,000 / $44,000. The 2026 $6,000 senior deduction (per person 65+, phasing out above $75,000 / $150,000 MAGI) offsets much of that tax for moderate incomes, but benefits remain technically taxable.
Who this is for: US retirees working out how much of their Social Security is taxable and what IRA withdrawals cost.
How Social Security benefits are taxed
| Provisional income* | Single / HoH | Married filing jointly | Taxable share |
|---|---|---|---|
| Below | $25,000 | $32,000 | 0% |
| Between | $25,000 – $34,000 | $32,000 – $44,000 | up to 50% |
| Above | $34,000 | $44,000 | up to 85% |
* Provisional (combined) income = AGI excluding benefits + tax-exempt interest + half of benefits.
- The tax torpedo: in the phase-in range each extra dollar of IRA withdrawal makes up to 85 cents of benefits taxable too, so the effective marginal rate can reach 40%+ even in the 22% bracket.
- Senior deduction: $6,000 per person aged 65+ for 2025–2028, phasing out at 6% of MAGI above $75,000 (single) / $150,000 (joint) — on top of the age-65 addition to the standard deduction.
- Withholding: you can ask SSA to withhold 7, 10, 12 or 22% (Form W-4V) to avoid estimated payments.
See also: Roth Conversion Calculator 2026, US Federal Income Tax Calculator 2026.
Assumptions
- Provisional income = other income + tax-exempt interest + 50% of benefits; taxable share = lesser of 50%/85% tiers per IRC §86.
- Standard deduction plus $1,650 / $2,050 per aged or blind addition; $6,000 senior deduction per person 65+, phased out at 6% of MAGI above $75,000 / $150,000.
- Federal tax from the 2026 brackets; no state tax.
Worked example
Provisional income $55,000 — above $34,000, so $22,350 (74.5%) of benefits is taxable; AGI $62,350. Standard deduction $18,150 ($16,100 + $2,050), senior deduction $6,000 (no phase-out at this MAGI) → taxable income $38,200, federal tax about $4,336. The benefits add about $2,682 of tax, and the next $1,000 of IRA withdrawal is taxed at an effective 22.2%.
Frequently asked questions
Is Social Security taxable in 2026?
Up to 85% of it, once provisional income exceeds $25,000 (single) or $32,000 (joint); below those thresholds none is taxed. The new $6,000 senior deduction reduces the tax for many retirees from 2025 to 2028.
What is the $6,000 senior deduction?
An extra deduction for each person aged 65+ on the return for 2025–2028, phasing out at 6% of MAGI above $75,000 (single) / $150,000 (joint); it is in addition to the standard deduction and its age-65 supplement.
How can I reduce tax on Social Security?
Draw from Roth accounts, use qualified charitable distributions from IRAs, spread large withdrawals across years, and consider Roth conversions before claiming benefits.
Do states tax Social Security?
Most do not; a minority tax it with income-based exemptions — check your state.
Are the $25,000 / $32,000 thresholds indexed?
No — they have been fixed since 1984 and 1993, so inflation pushes more retirees into the taxable tiers every year.
Does the senior deduction make benefits tax-free?
Not literally: the deduction reduces taxable income for everyone 65+, which for many moderate-income retirees removes the tax their benefits would have generated.
Related calculators
See all United States calculators → · All free online calculators
Found an error? Report it — tell us the inputs, the result you got, what you expected and the rule or source. Confirmed corrections are published within a week.
Ready to build your next digital solution?
Send the brief and you get a scoped response with approach, milestones and a fixed price range. Not a sales call.
A 30-minute call with the engineer who would run your project
Within 2 business daysA written scope: approach, module breakdown, milestones, fixed price range
Within 5 business daysYou decide. No retainer, no obligation, and the scope document is yours to keep either way
Your timelineSend your brief
Three fields to start. Add project details if you have them.