Whether you pay tax on Social Security depends on your other income

Not all Social Security recipients pay federal income tax on their benefits. The amount you owe depends on your combined income — a calculation that includes your Social Security, wages, interest, dividends, and certain other sources. If your combined income falls below a threshold set by the IRS, you owe nothing on your benefits. If it exceeds that threshold, you may owe tax on a portion of your benefits, not the whole amount.

The IRS uses two income thresholds. For single filers, the first threshold is $25,000; for married couples filing jointly, it is $32,000. These thresholds have not changed since 1984. If your combined income exceeds the first threshold but stays below a second threshold ($34,000 for single filers, $44,000 for married couples), you may owe tax on up to 50 percent of your benefits. If your combined income exceeds the second threshold, you may owe tax on up to 85 percent of your benefits.

Combined income is calculated as your adjusted gross income plus nontaxable interest plus half of your Social Security benefits. This formula means that even small amounts of other income can push you over a threshold and trigger taxation on your benefits.

Key Takeaways

  • You pay tax on Social Security only if your combined income — Social Security plus wages, interest, and other sources — exceeds $25,000 (single) or $32,000 (married filing jointly).
  • The IRS thresholds have remained the same since 1984 and are not adjusted for inflation each year.
  • Even if you owe tax, you typically owe it only on a portion of your benefits, not the full amount.
  • Withholding tax from your Social Security check or making estimated quarterly payments can reduce what you owe when you file.
  • Certain income sources, such as Roth IRA withdrawals and municipal bond interest, do not count toward the combined income calculation.

How the IRS calculates combined income

Combined income is not the same as your total income. The IRS starts with your adjusted gross income (AGI) — the number on line 11 of Form 1040 — then adds back nontaxable interest and half of your Social Security benefits. This three-part sum is what determines whether you owe tax on your benefits.

If you have a pension, wages, or self-employment income, all of those count toward combined income. If you have interest from a savings account or CD, that counts. Dividend income counts. Capital gains count. However, some income sources do not: Roth IRA withdrawals, municipal bond interest, and certain other nontaxable items are excluded from the calculation.

The reason half of your Social Security is added back is technical — it prevents the IRS from counting the same dollar twice — but the practical effect is that even a small amount of other income can push you over a threshold. For example, if you receive $20,000 in Social Security and $10,000 in pension income, your combined income is $10,000 plus half of $20,000, which equals $20,000. That is below the $25,000 threshold for single filers, so you owe no tax. But if your pension income is $15,000 instead, your combined income becomes $25,000, and you may owe tax on some of your benefits.

What to do if you will owe tax on your benefits

You have two main options: withhold tax from your Social Security check, or make estimated quarterly tax payments. Withholding is simpler and more common.

To withhold tax from your Social Security, you fill out Form W-4V and send it to your local Social Security office or submit it online through your my Social Security account. You can choose to withhold 7, 10, 12, or 22 percent of your monthly benefit. The IRS does not offer other withholding rates for Social Security, so you may need to choose the closest option to what you actually owe. The withheld amount is sent to the IRS and credited toward your annual tax bill.

If you prefer not to withhold from Social Security, you can make estimated quarterly tax payments directly to the IRS using Form 1040-ES. This route requires you to calculate what you expect to owe and pay it in four installments: April 15, June 15, September 15, and January 15. If you underpay, you may owe a penalty when you file your return.

Some people use both methods — withholding from Social Security and making estimated payments from other income — to cover their total tax bill. The goal is to pay enough throughout the year so that you do not owe a large amount when you file your return in April.

Income sources that do not count toward the threshold

Certain types of income are excluded from the combined income calculation, which means they do not push you over a threshold and do not trigger taxation on your benefits. Understanding which sources are excluded can help you plan your finances.

Withdrawals from a Roth IRA do not count. Withdrawals from a Roth 401(k) do not count. Municipal bond interest does not count. Veterans benefits do not count. Supplemental Security Income (SSI) does not count. Workers' compensation does not count. Some state and local government pensions do not count, though the rules are complex and depend on when you started receiving the pension.

This is why some people structure their retirement income to use these sources first — it can keep their combined income below a threshold and reduce or eliminate tax on their Social Security. For example, if you have both a traditional IRA and a Roth IRA, withdrawing from the Roth first means your combined income stays lower, which may reduce the amount of Social Security that is taxable.

The difference between federal and state tax on Social Security

Federal tax on Social Security is what the IRS collects. State tax on Social Security is separate and varies by state. Some states do not tax Social Security at all. Others tax it the same way the federal government does — using combined income thresholds. A few states have their own thresholds, which may be higher or lower than the federal thresholds.

States that do not tax Social Security include Florida, Illinois, Mississippi, South Carolina, Tennessee, and Wyoming, among others. States that tax Social Security using federal thresholds include Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont. A few states, such as Colorado and Connecticut, offer additional exemptions or deductions for Social Security income.

You will need to check your state's tax rules separately from the federal rules. Your state tax return may use a different form and different thresholds than your federal return. Some people find that moving to a state with no Social Security tax reduces their overall tax burden significantly, though this is only one factor in a move decision.

How to report Social Security on your tax return

Social Security income is reported on Form 1040, the main federal income tax return. You will receive a Form SSA-1099 from Social Security in January showing how much you received in the previous year. This form lists your benefits in box 5.

You enter the amount from box 5 on line 5b of Form 1040. If you are married filing jointly, both spouses' benefits go on the same line. The form then walks you through a worksheet to calculate how much of your benefits, if any, is taxable. This worksheet uses the combined income calculation described earlier.

If you withheld tax using Form W-4V, that amount will show on your Form 1040 as federal tax paid. If you made estimated quarterly payments, those also show as tax paid. When you file your return, the IRS compares what you paid throughout the year to what you actually owe. If you paid too much, you receive a refund. If you paid too little, you owe the difference.

Frequently Asked Questions

Can I reduce the tax I owe on Social Security by timing my withdrawals from retirement accounts?

Yes. Withdrawals from traditional IRAs and 401(k)s count toward combined income, but Roth withdrawals do not. If you have both types of accounts, taking money from your Roth first keeps your combined income lower and may reduce the portion of Social Security that is taxable. However, Roth withdrawals have their own rules about timing and penalties, so consult a tax professional before changing your withdrawal strategy.

What happens if I do not withhold tax and do not make estimated payments?

You will owe the full amount of tax due when you file your return in April. If the amount is large, you may also owe a penalty for underpayment of estimated tax. The IRS charges interest on unpaid taxes. Setting up withholding or making estimated payments avoids this penalty and spreads your tax bill throughout the year.

Do I have to file a tax return if I only receive Social Security?

Not necessarily. If Social Security is your only income and it is below a certain threshold, you do not have to file. However, if you have other income — wages, interest, dividends, or a pension — you may have to file even if you do not owe tax. Filing can also be beneficial if you withheld tax, because you may receive a refund. Check the IRS filing requirements for your specific situation.

If I move to a state with no Social Security tax, do I stop paying federal tax?

No. Federal tax on Social Security is separate from state tax. Moving to a state with no Social Security tax eliminates your state tax bill on benefits but does not change what you owe to the federal government. You will still owe federal tax if your combined income exceeds the IRS thresholds.

Can I change my withholding rate if my income changes?

Yes. You can submit a new Form W-4V to Social Security at any time to change your withholding rate. If your income increases or decreases, or if your tax situation changes, updating your withholding ensures you are paying the right amount throughout the year. You can also stop withholding entirely if your situation changes.