Most Social Security income is not taxed, but some of it may be depending on your other income

You do not automatically pay federal income tax on Social Security benefits. Whether you owe tax depends on how much other income you have — wages, pensions, interest, or retirement account withdrawals. If your total income stays below a certain threshold, your Social Security is completely tax-free. If you cross that threshold, you may owe tax on up to 85 percent of your benefits, not the full amount.

The threshold is low and has not changed since 1984, which means more people hit it each year even though their actual income has not grown much. This is called "taxation of benefits," and it affects roughly 10 to 15 percent of people who receive Social Security. The rules are the same whether you are retired, disabled, or receiving survivor benefits.

Key Takeaways

  • If your combined income (Social Security plus other income) is below $25,000 as a single filer or $32,000 as a married couple filing jointly, you owe no federal tax on Social Security.
  • Combined income is calculated using a specific formula that includes half your Social Security benefits plus all other income, including tax-exempt interest.
  • If you cross the threshold, you may owe tax on 50 to 85 percent of your benefits, depending on how far over you go.
  • You can reduce the amount of tax withheld from your benefits by filing Form W-4V with Social Security, or you can make quarterly estimated tax payments instead.

How the IRS calculates whether your Social Security is taxed

The IRS uses a number called combined income to decide whether you owe tax on benefits. Combined income is not the same as your total income. It is calculated this way: take half of your Social Security benefits, add all your other income (wages, pensions, interest, dividends, rental income), and add any tax-exempt interest from municipal bonds. That total is your combined income.

The thresholds are $25,000 for single filers and $32,000 for married couples filing jointly. If your combined income is at or below that number, you owe no federal tax on Social Security. If it is above that number, you may owe tax on some of your benefits.

Example: You receive $20,000 in Social Security and have $10,000 in pension income. Your combined income is ($20,000 ÷ 2) + $10,000 = $20,000. You are below the $25,000 threshold, so none of your Social Security is taxed.

Another example: You receive $20,000 in Social Security and have $15,000 in pension income. Your combined income is ($20,000 ÷ 2) + $15,000 = $25,000. You are at the threshold, so none of your Social Security is taxed. If your pension were $16,000 instead, your combined income would be $26,000, and some of your benefits would be taxed.

How much of your benefits can be taxed

If your combined income exceeds the threshold, the amount of your benefits that is taxed depends on how far over you go. The IRS taxes benefits in two tiers.

In the first tier, if your combined income is between the threshold and $9,000 more than the threshold (so $34,000 to $43,000 for single filers), up to 50 percent of your benefits may be taxed. In the second tier, if your combined income exceeds that second threshold, up to 85 percent of your benefits may be taxed. You never pay tax on more than 85 percent of your benefits, even if your combined income is very high.

The actual calculation is complex and involves multiple steps. The IRS provides a worksheet in the instructions to Form 1040 that walks you through it. If you use tax software or work with a tax preparer, they will calculate this for you.

Whether you need to file a tax return at all

You may not need to file a federal tax return even if you receive Social Security. The IRS sets a filing threshold each year based on your age and filing status. For 2024, a single person under 65 with only Social Security income does not have to file unless their benefits exceeded $14,600. A single person 65 or older does not have to file unless their benefits exceeded $18,350.

These thresholds apply only if Social Security is your only income. If you have wages, pensions, interest, or other income, you may need to file even if your total is below the threshold. The rule is: if your gross income (before any deductions) is above the threshold for your age and filing status, you must file.

Even if you are not required to file, you may want to file anyway. If you had taxes withheld from your benefits or from other income, filing a return may get you a refund. If you have a child or other dependent, you may be able to claim the Earned Income Tax Credit or Child Tax Credit, which requires filing.

How to control how much tax is withheld from your benefits

Social Security can withhold federal income tax from your monthly benefit payment if you ask them to. You do this by filing Form W-4V with the Social Security Administration. You can choose to have 7, 10, 12, or 22 percent of your benefit withheld each month, or you can request a flat dollar amount.

To file Form W-4V, you can download it from ssa.gov, fill it out, and mail it to your local Social Security office. You can also bring it in person or call Social Security to request a form. Changes usually take effect within one or two months.

If you do not want to have tax withheld from your benefits, you can make quarterly estimated tax payments to the IRS instead. This is useful if you have other income that is not subject to withholding, such as interest or rental income. You file Form 1040-ES with the IRS four times a year.

State income tax on Social Security

Most states do not tax Social Security benefits. However, 13 states tax some or all of your benefits under certain conditions. These states are Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, Vermont, and West Virginia.

The rules vary by state. Some states use the same federal thresholds; others use different ones. Some states exempt benefits for people over a certain age. If you live in one of these states, contact your state tax authority or a tax preparer to find out whether you owe state tax on your benefits.

What to do if you think you were taxed incorrectly

If you filed a tax return and believe the calculation of taxable benefits was wrong, you can file an amended return using Form 1040-X. You have generally three years from the date you filed the original return to file an amended return and claim a refund.

If you are not sure whether you need to file or whether you calculated your tax correctly, the IRS offers free tax help through the Volunteer Income Tax Assistance (VITA) program. VITA sites are run by nonprofits and operate in most communities during tax season. You can find a site near you at irs.gov/vita. You can also call the IRS at 1-800-829-1040 to ask questions about your specific situation.

Frequently Asked Questions

Can I reduce my combined income to avoid taxation of benefits?

You cannot reduce your actual income, but you can structure certain income to lower your combined income calculation. For example, if you have not yet claimed Social Security, delaying your claim increases your monthly benefit but does not increase your combined income in years when you have no benefits. Withdrawals from a Roth IRA do not count as income. A tax professional can review your situation and suggest strategies.

If I am married and file separately, how does that affect the threshold?

If you are married and file a separate return, the threshold is $0 — meaning any combined income at all may trigger taxation of benefits. This is why married couples almost always file jointly when one or both receive Social Security. Filing separately is rarely advantageous.

Does the taxation of benefits affect my Medicare premiums?

No. Medicare premiums are based on your modified adjusted gross income (MAGI), which is calculated differently than combined income for Social Security taxation. However, higher income can increase your Medicare Part B and Part D premiums through a process called Income-Related Monthly Adjustment Amounts (IRMAA). This is a separate calculation from Social Security taxation.

What if I worked while receiving Social Security before full retirement age?

Earnings do not affect whether your benefits are taxed federally. However, if you are under full retirement age and earn above a certain amount, Social Security will reduce your monthly benefit payment. That reduction is separate from federal income tax. Once you reach full retirement age, earnings do not reduce your benefit, and the taxation rules described here apply normally.

Do I have to pay tax on my spouse's Social Security if we file jointly?

Your spouse's benefits are included in the combined income calculation for the household. If your household combined income is above the threshold, some of both your benefits and your spouse's benefits may be taxed. The tax is calculated on the household level, not individually.