Pension + Social Security Income Tax Calculator (2026)

Most pension holders are surprised to discover that their pension income pushes most of their Social Security into the taxable column. Under IRS rules (IRC §86), up to 85% of your Social Security benefit can be taxable once your combined income exceeds a threshold set in 1993 and never adjusted for inflation. This calculator shows the exact tax impact using 2026 federal brackets.

How Social Security taxation works with pension income

The IRS uses a formula called provisional income to determine how much of your Social Security benefit is taxable. Provisional income is calculated as:

Provisional Income = Adjusted Gross Income (excluding SS) + Tax-Exempt Interest + 50% of annual SS benefits

Your provisional income falls into one of three zones:

Critical point: These thresholds were set in 1983 and 1993 and have never been adjusted for inflation. A retiree with a modest $2,000/month pension and $1,800/month SS has provisional income of roughly $34,800 — squarely in the 85% zone. In 1983, that retiree would have been wealthy. Today, it describes a typical middle-income retiree.

The SS tax torpedo — and how pension income makes it worse

The "tax torpedo" describes the elevated effective marginal rate that occurs while Social Security phases into taxable income. Here's why pension income is particularly problematic:

• Pension income counts fully toward provisional income — there's no 50% haircut like SS. Every dollar of pension income is a full dollar of provisional income.
• In the 85% zone, each additional $1 of income makes $0.85 more of SS taxable. Your taxable income increases by $1.85. In the 22% bracket, that's an effective rate of 40.7% on income in this zone.
• Pension annuities are a permanent floor — unlike IRA withdrawals you can defer, your monthly annuity keeps coming, keeping you in the high-provisional-income zone every year.

Planning strategies to reduce the torpedo effect

If you haven't yet elected your pension form, or if you're considering a lump-sum rollover, these strategies directly affect how much SS gets taxed:

1. Lump-sum rollover to IRA + withdrawal flexibility. If you take the lump sum and roll to an IRA, you control how much you withdraw each year. You can take less in high-SS-taxation years and more in years when Social Security hasn't started yet. A pension annuity offers no such flexibility.
2. Roth conversions during age 60–72. Converting IRA money to Roth before RMDs begin increases current-year income — but permanently reduces future IRA balances that would cause forced taxable income. The Roth conversion "burns down" the balance before it creates mandatory torpedo exposure. See the Roth conversion guide.
3. Delay Social Security to 70. A higher SS benefit at 70 means higher provisional income when you claim — but you may also have lower other income during ages 62–69 (using pension or IRA withdrawals strategically). A fee-only advisor can model the break-even.
4. OBBBA $6,000 senior bonus deduction. For 2025–2028, taxpayers 65+ may claim an additional $6,000 deduction per person, phasing out above $75,000 single / $150,000 MFJ in income. This reduces taxable income — but doesn't change provisional income (it's a deduction, not an income exclusion). SS taxability is calculated before deductions. The deduction still reduces your tax bill, but doesn't reduce how much SS is classified as taxable.
5. Qualified Longevity Annuity Contracts (QLACs). A QLAC (see the RMD guide) lets you shelter up to $210,000 of your IRA from RMDs until as late as age 85 — reducing forced taxable distributions that would raise provisional income. The 2026 limit is $210,000 per IRS Notice 2025-67.

Pension annuity vs. IRA rollover: the SS taxation angle

The lump-sum vs. annuity decision has a direct impact on lifetime SS taxation that most analysis ignores:

• If you keep the annuity, you have a permanent, guaranteed income floor that keeps provisional income elevated for life. Every year, 85% of your SS is probably taxable. You have no flexibility.
• If you roll over to an IRA, you have withdrawal flexibility. You can take less in years where you want to reduce provisional income, delay large withdrawals to low-income years, and use Roth conversions to shift future income to tax-free. You pay the same SS tax in the first few years, but you may be able to reduce it over a 20–30 year retirement.

The value of this flexibility is real but hard to quantify without modeling your specific longevity, investment return, and Roth conversion schedule — exactly what a fee-only pension specialist does.