Many retirees are surprised to learn that Social Security benefits can be taxable. Whether you owe tax — and how much — depends on your total income from all sources. Understanding this before you retire can help you plan withdrawals and avoid an unexpected tax bill.
The Combined Income Formula
The IRS uses a figure called combined income (also called provisional income) to determine how much of your Social Security benefit is taxable. Combined income is calculated as:
- Your adjusted gross income (AGI)
- Plus any nontaxable interest (such as from municipal bonds)
- Plus 50 percent of your Social Security benefit
The result determines what portion of your benefit is subject to federal income tax.
The Three Thresholds
If your combined income is below $25,000 as a single filer (or $32,000 for married filing jointly), your Social Security benefit is not taxable at the federal level.
If your combined income is between $25,000 and $34,000 (single) or $32,000 and $44,000 (married), up to 50 percent of your benefit may be taxable.
If your combined income exceeds $34,000 (single) or $44,000 (married), up to 85 percent of your benefit may be subject to federal income tax. This does not mean you pay 85 percent in tax — it means 85 percent of the benefit is included in your taxable income and taxed at your ordinary rate.
These Thresholds Have Not Been Adjusted for Inflation
The income thresholds were set in 1983 and 1993 and have never been updated for inflation. Because of this, a growing share of retirees pay tax on their benefits each year, even those with modest incomes. If you receive a pension, IRA distributions, or part-time income alongside Social Security, you may cross these thresholds without realizing it.
State Taxes on Social Security
Most states do not tax Social Security income. However, a handful of states — including Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, Vermont, and West Virginia — do tax Social Security to varying degrees. Check your state’s rules, as they vary significantly and some states exempt lower-income retirees entirely.
How to Reduce the Tax on Your Benefits
Managing combined income is the main lever. Strategies include:
- Delaying IRA or 401(k) withdrawals until required minimum distributions begin
- Converting traditional IRA funds to a Roth IRA before Social Security begins — Roth withdrawals do not count as combined income
- Being mindful of when you realize capital gains
- Limiting taxable interest income
Even shifting a portion of your income to a Roth account in the years before you claim Social Security can reduce how much of your benefit is taxed.
Withholding Tax from Your Benefits
You can ask the Social Security Administration to withhold federal income tax from your monthly payments. Use Form W-4V to request withholding at 7, 10, 12, or 22 percent. This helps avoid a lump-sum tax bill when you file. Alternatively, you can make quarterly estimated tax payments.
Knowing how Social Security is taxed lets you plan more precisely — and keep more of what you’ve earned.
Money Instructor does not provide tax, legal, or investment advice. This material has been prepared for educational and informational purposes only. You should consult your own advisors regarding your own financial situation.