How Social Security Benefits Are Taxed
Social Security taxation is determined by your "combined income," which equals your adjusted gross income + nontaxable interest + half of your Social Security benefits. The IRS uses this combined income to determine what percentage of your benefits is taxable.
| Filing Status | Combined Income | % of SS Taxable |
|---|---|---|
| Single | Below $25,000 | 0% |
| Single | $25,000 – $34,000 | Up to 50% |
| Single | Above $34,000 | Up to 85% |
| Married (Joint) | Below $32,000 | 0% |
| Married (Joint) | $32,000 – $44,000 | Up to 50% |
| Married (Joint) | Above $44,000 | Up to 85% |
For example, a single retiree with $20,000 in Social Security and $15,000 in pension income has a combined income of $20,000 (pension + other income) + $10,000 (half of SS) = $30,000. Since this falls between $25,000 and $34,000, up to 50% of their Social Security ($10,000) may be taxable.
Deductions for Senior Taxpayers
The 2025 tax year provides exceptionally generous deductions for taxpayers aged 65 and older, thanks to the combination of the regular standard deduction, the existing additional senior deduction, and the new senior bonus deduction.
| Filing Status | Standard Deduction | Additional (65+) | Senior Bonus (OBBBA) | Total |
|---|---|---|---|---|
| Single, age 65+ | $15,000 | $2,000 | $4,000 | $21,000 |
| MFJ, both 65+ | $30,000 | $3,200 | $8,000 | $41,200 |
| MFJ, one 65+ | $30,000 | $1,600 | $4,000 | $35,600 |
| HOH, age 65+ | $22,500 | $2,000 | $4,000 | $28,500 |
A single retiree with $21,000 or less in total income would owe zero federal income tax. A married couple both 65+ with up to $41,200 in total income would owe zero. These are the highest effective tax-free thresholds in recent tax history for seniors.
How Different Retirement Income Is Taxed
| Income Source | Federal Tax Treatment |
|---|---|
| Social Security | 0%, 50%, or 85% taxable based on combined income |
| Traditional 401(k)/IRA | Fully taxable as ordinary income |
| Roth IRA/401(k) | Tax-free (qualified distributions) |
| Pension/Annuity | Generally fully taxable (unless after-tax contributions made) |
| Required Minimum Distributions | Fully taxable as ordinary income |
| Capital gains (investments) | 0%, 15%, or 20% depending on income level |
| Municipal bond interest | Tax-free at federal level |
The order in which you withdraw from different accounts significantly affects your total tax bill. A common strategy is to withdraw from taxable accounts first (capital gains receive preferential rates), then tax-deferred accounts (traditional IRA/401k), and finally tax-free accounts (Roth IRA) last. This allows tax-free accounts to grow the longest. However, Roth conversions during low-income early retirement years can shift the optimal strategy.
Required Minimum Distributions (RMDs)
Under the SECURE 2.0 Act, required minimum distributions from traditional IRAs and 401(k) plans begin at age 73. RMDs are calculated by dividing your account balance as of December 31 of the prior year by an IRS life expectancy factor. Failure to take RMDs results in a 25% penalty on the amount not withdrawn (reduced from the previous 50% penalty).
RMDs are fully taxable as ordinary income and can push retirees into higher tax brackets and increase Social Security taxation. Planning ahead by considering Roth conversions before age 73, taking slightly larger distributions in low-income years to smooth out the tax burden, and using qualified charitable distributions (QCDs) to satisfy RMDs tax-free can all reduce the lifetime tax impact of RMDs.
Frequently Asked Questions
Up to 85% of your Social Security benefits may be taxable at the federal level, depending on your combined income (AGI + nontaxable interest + half of SS benefits). If combined income is below $25,000 (single) or $32,000 (MFJ), benefits are not taxed. Between $25,000-$34,000 (single), up to 50% is taxable. Above $34,000 (single), up to 85% is taxable.
Under the One Big Beautiful Bill Act, taxpayers aged 65 and older can claim an additional $4,000 deduction ($8,000 for married couples both 65+). This is on top of the regular standard deduction and the existing additional standard deduction for seniors. A single senior's total standard deduction could reach $21,000.
Yes, most pension distributions are fully taxable at the federal level because contributions were typically made with pre-tax dollars. However, if you made after-tax contributions to your pension, a portion of each distribution may be tax-free (the return of your basis).
Traditional IRA withdrawals are taxable as ordinary income. Roth IRA qualified withdrawals are completely tax-free. Required minimum distributions from traditional IRAs begin at age 73 (under the SECURE 2.0 Act) and are taxable.
States that do not tax Social Security include all 43 income-tax states except a handful. States that exempt most retirement income include Pennsylvania (fully exempt), Illinois (fully exempt), Mississippi (fully exempt), and Iowa (largely exempt for those 55+). Visit our state calculators for specific details.
Taxpayers aged 65 or older receive an additional standard deduction of $2,000 (single/HOH) or $1,600 per qualifying spouse (married filing jointly), on top of the regular standard deduction and the new $4,000 senior bonus deduction.
Roth conversions can be beneficial in low-income years during early retirement. You pay income tax on the converted amount now, but future withdrawals (including growth) are tax-free. This strategy works best when you expect to be in a higher tax bracket later or want to reduce required minimum distributions.
The Saver's Credit provides up to $1,000 ($2,000 MFJ) for qualifying retirement contributions if your AGI is below $38,250 (single) or $76,500 (MFJ). While primarily aimed at workers, retirees who are still contributing to IRAs may qualify.