Social Security is taxable income for some people, not others

Whether you owe federal income tax on your Social Security depends on your total income for the year. If your combined income stays below a certain threshold, you pay no tax on Social Security. If it rises above that threshold, you may owe tax on a portion of your benefits — not all of it, just the amount over the line.

The threshold is low enough that many people who receive Social Security do cross it. The IRS counts not just your Social Security but also wages, interest, dividends, and other income toward this total. Some states also tax Social Security, though most do not.

Key Takeaways

  • You calculate whether Social Security is taxable by adding half your benefits to all your other income; if that total exceeds $25,000 (single) or $32,000 (married filing jointly), some of your benefits are taxable.
  • The IRS taxes up to 50 percent of your benefits if you are slightly over the threshold, or up to 85 percent if you are well over it.
  • Most states do not tax Social Security, but a handful do — check your state's rules if you live in Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, or Vermont.
  • You can ask the Social Security Administration to withhold federal income tax from your monthly payment so you do not owe a large bill at tax time.
  • If you work while receiving Social Security before full retirement age, your benefits may be reduced, which also affects your tax calculation.

How the IRS calculates your taxable Social Security

The IRS uses a formula called combined income to determine whether your Social Security is taxable. Combined income is half of your Social Security benefits plus all your other income — wages, self-employment income, interest, dividends, rental income, pensions, and distributions from retirement accounts.

Once you know your combined income, compare it to your base amount. For a single filer, the base amount is $25,000. For married couples filing jointly, it is $32,000. For married couples filing separately, it is $0 — meaning almost all of your Social Security will be taxable if you file this way.

If your combined income is below your base amount, none of your Social Security is taxable. If it exceeds your base amount, the IRS taxes up to 50 percent of your benefits. If your combined income exceeds a second threshold — $34,000 for single filers, $44,000 for married filing jointly — the IRS can tax up to 85 percent of your benefits.

The actual amount taxed is calculated in two tiers. The first tier covers the amount between your base amount and the second threshold; the second tier covers anything above the second threshold. This means you never pay tax on more than 85 percent of your benefits, even if your income is very high.

Example: calculating your tax on Social Security

Suppose you are single and receive $18,000 in Social Security for the year. You also have $15,000 in pension income. Your combined income is ($18,000 ÷ 2) + $15,000 = $24,000. Since $24,000 is below your base amount of $25,000, none of your Social Security is taxable.

Now suppose you have $20,000 in pension income instead. Your combined income is ($18,000 ÷ 2) + $20,000 = $29,000. This exceeds your base amount by $4,000. The IRS taxes the lesser of (a) half of the excess ($2,000) or (b) half of your benefits ($9,000). You owe tax on $2,000 of your Social Security.

If your pension income were $40,000, your combined income would be ($18,000 ÷ 2) + $40,000 = $49,000. This exceeds the second threshold of $34,000 by $15,000. The calculation becomes more complex: you pay tax on the lesser of (a) 85 percent of your benefits ($15,300) or (b) the sum of half the first-tier excess plus 85 percent of the second-tier excess. In this case, you would owe tax on $15,300 of your Social Security.

Which states tax Social Security

Most states do not tax Social Security benefits at all. However, Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont do tax some or all of it. The rules vary by state — some tax it the same way the federal government does, others use different thresholds or exclude certain types of recipients.

If you live in one of these states, you will need to check your state's tax code or contact your state tax authority to understand how much of your benefits are taxable. Some states exempt people over a certain age or with income below a certain level. A few states tax only the portion that is also taxable at the federal level.

How to avoid a large tax bill at tax time

If you know your Social Security will be taxable, you can ask the Social Security Administration to withhold federal income tax from your monthly payment. This way, you pay the tax gradually throughout the year instead of owing a lump sum when you file your return.

To set up withholding, contact Social Security by phone at 1-800-772-1213, by mail, or through your online account at ssa.gov. You will need to complete Form W-4V, which lets you choose how much to withhold — either a flat dollar amount or a percentage of your benefit. You can change your withholding at any time if your income changes.

Withholding is optional, but it is a practical way to manage your tax liability. Without it, you may owe a large payment in April, or you may need to make quarterly estimated tax payments if you have other income.

What happens if you work while receiving Social Security

If you have not yet reached your full retirement age and you work, the Social Security Administration will reduce your benefits by $1 for every $2 you earn above an annual limit. For 2024, that limit is $23,400. In the year you reach full retirement age, the limit is higher ($62,160), and the reduction applies only to earnings before the month you reach full retirement age.

This earnings test affects your combined income calculation. If your benefits are reduced because you are working, your combined income is lower, which may mean less of your remaining benefits are taxable. However, your wages themselves are still counted as income, so the overall effect depends on how much you earn.

Frequently Asked Questions

Do I have to file a tax return if my only income is Social Security?

Not necessarily. If your combined income is below your base amount, your Social Security is not taxable, and you may not need to file a return. However, if you have other income or if you had taxes withheld, filing a return may allow you to claim a refund. The IRS publishes income thresholds for filing requirements each year.

Can I reduce my taxable Social Security by taking less income?

Yes. If you have control over when you receive other income — such as distributions from an IRA or the sale of an investment — timing those withdrawals or sales to stay below your base amount can reduce or eliminate the tax on your Social Security. This is a common strategy for people in the years just after they start receiving benefits.

What if I made a mistake on my tax return and paid too much tax on Social Security?

You can file an amended return using Form 1040-X to correct the error and request a refund. You generally have three years from the date you filed the original return to file an amended return and claim a refund.

Does the tax on Social Security explore to Supplemental Security Income (SSI)?

No. Supplemental Security Income is not taxable income. Only Social Security retirement, survivor, and disability benefits are subject to the tax rules described here. SSI is a separate program with different rules.

If I am married and file separately, is there any way to avoid the $0 base amount?

No. The IRS treats married couples filing separately as having a $0 base amount, meaning nearly all of your Social Security is taxable. Filing jointly, if you are able to, results in a much higher base amount and typically lower overall tax. Consult a tax professional if you are in this situation.