Social Security benefits are taxable income in some cases, but not in others

Whether you owe federal income tax on your Social Security depends on your total income for the year. If Social Security is your only income, you typically will not owe tax. But if you have other income — from a job, a pension, investments, or retirement account withdrawals — some of your Social Security may become taxable.

The IRS uses a formula based on what they call combined income. This is your adjusted gross income plus nontaxable interest plus half of your Social Security benefits. If your combined income exceeds a certain threshold, you may owe tax on up to 50% or 85% of your benefits, depending on how much you earn.

State taxes are separate. Most states do not tax Social Security at all. A few states — Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, Rhode Island, and Utah — tax Social Security under certain conditions, usually only if your income is above a threshold they set. You will need to check your own state's rules.

Key Takeaways

  • Social Security becomes taxable only if your combined income (Social Security plus other income) exceeds $25,000 for a single filer or $32,000 for a married couple filing jointly.
  • If you are taxed, the IRS taxes either 50% or 85% of your benefits, never 100%, and the amount depends on how much your combined income exceeds the threshold.
  • You can reduce the amount of tax owed by managing when you take retirement account withdrawals or by working with a tax preparer to time income across years.
  • Most states do not tax Social Security; only nine states tax it, and each has its own income threshold and rules.
  • The IRS does not automatically withhold tax from Social Security, so you may need to make quarterly estimated tax payments or request withholding if you expect to owe.

How the IRS calculates whether your benefits are taxable

The calculation starts with your combined income. Add together your adjusted gross income (wages, self-employment income, taxable interest, taxable dividends, taxable pensions, and taxable retirement account withdrawals), plus any nontaxable interest (such as from municipal bonds), plus half of your Social Security benefits for the year.

If you file as single and your combined income is $25,000 or less, none of your Social Security is taxable. If you file as married filing jointly and your combined income is $32,000 or less, none is taxable. If you file as married filing separately, the threshold is $0 — meaning almost any combined income will result in some taxation.

If your combined income exceeds the threshold, the taxable portion is the smaller of (1) half of your Social Security benefits, or (2) half of the amount by which your combined income exceeds the threshold. If your combined income is high enough, up to 85% of your benefits can become taxable.

The IRS publishes a worksheet each year to calculate this. Many tax software programs do this calculation automatically. If you prepare your own return, you can find the worksheet in IRS Publication 915, which is free on the IRS website.

Examples of how taxation works in practice

Suppose you are single and receive $20,000 in Social Security for the year. You have no other income. Your combined income is $10,000 (half of $20,000). Since $10,000 is below $25,000, you owe no tax on your Social Security.

Now suppose you are single, receive $20,000 in Social Security, and withdraw $15,000 from a traditional IRA. Your combined income is now $25,000 (your $15,000 IRA withdrawal plus half of your $20,000 Social Security). You are exactly at the threshold, so none of your Social Security is taxable.

If instead you withdraw $20,000 from your IRA, your combined income becomes $30,000. You are $5,000 over the threshold. Half of that overage is $2,500. Since half of your Social Security is $10,000, the taxable amount is the smaller of these two: $2,500. You would owe tax on $2,500 of your $20,000 benefit.

If you are married filing jointly and your combined income is $50,000, you are $18,000 over the $32,000 threshold. Half of that is $9,000. Since half of your combined Social Security is less than $9,000 in this example, up to 50% of your benefits would be taxable. If your combined income reaches $44,000 or higher, up to 85% of your benefits can be taxed.

Ways to reduce the tax you owe on Social Security

One strategy is to manage the timing of retirement account withdrawals. If you have a choice about when to take money from an IRA, 401(k), or other retirement account, taking it in a year when your Social Security is lower (or when you have no other income) can keep your combined income below the taxable threshold.

Roth conversions can sometimes help. When you convert a traditional IRA to a Roth, the conversion counts as income in that year, which raises your combined income and may increase Social Security taxation. But in future years, Roth withdrawals do not count as income, so they do not affect whether your Social Security is taxed. A tax preparer can model whether a conversion makes sense for your situation.

Tax-deductible contributions to a traditional IRA can lower your adjusted gross income, which lowers your combined income. If you are still working and under age 73, you may be able to contribute to a traditional IRA and deduct the contribution, though income limits explore if you have a workplace retirement plan.

Delaying Social Security can also help. If you are not yet at full retirement age and you are still working, you can choose not to claim benefits yet. This keeps your combined income lower in the current year and may reduce taxation. Once you do claim, your monthly benefit will be higher because you waited.

How to handle tax withholding on Social Security

Social Security does not automatically withhold federal income tax from your benefits the way an employer does from a paycheck. If you expect to owe tax, you have two options: make quarterly estimated tax payments to the IRS, or request that Social Security withhold a flat amount from your monthly benefit.

To request withholding, you fill out Form W-4V and send it to your local Social Security office or mail it to Social Security. You can choose to have 7%, 10%, 12%, or 22% of your monthly benefit withheld. This is simpler than making quarterly payments, and it spreads the tax across the year instead of paying it all at once.

You can change your withholding at any time by submitting a new Form W-4V. If you did not withhold enough during the year and owe tax when you file your return, you will owe the balance then. If you withheld too much, you will receive a refund.

Some people choose not to withhold and instead file a return and pay any tax owed when they file. This works if you have the money set aside. Others make quarterly estimated payments using Form 1040-ES. Your tax preparer can help you decide which approach fits your situation.

State income tax on Social Security

Nine states tax Social Security benefits: Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, Rhode Island, and Utah. Each state has its own rules about income thresholds and how much of your benefit is taxable.

Colorado, Kansas, and Missouri tax Social Security the same way the federal government does — based on combined income and thresholds. Connecticut, Minnesota, Montana, Nebraska, and Utah use different formulas or thresholds. Rhode Island taxes Social Security like ordinary income if your total income exceeds a certain amount.

If you live in one of these nine states, contact your state tax authority or a tax preparer familiar with your state's rules. The amount of state tax is usually smaller than federal tax, but it is still worth understanding so you can plan ahead.

What to ask your tax preparer or the IRS

If you prepare your own taxes, the IRS Publication 915 walks through the calculation step by step. You can also call the IRS at 1-800-829-1040 to ask about your specific situation, though wait times can be long during tax season.

If you work with a tax preparer, ask them to show you the combined income calculation and explain which of your income sources pushed your Social Security into taxable territory. Ask whether any changes to your withdrawal timing or Roth conversions would lower your tax bill. Ask also about your state's rules if you live in one of the nine states that tax Social Security.

If you are not yet claiming Social Security, ask your preparer or a financial planner whether delaying your claim would reduce taxation once you do claim. The answer depends on your health, your other income sources, and your life expectancy — there is no one-size-fits-all answer.

Frequently Asked Questions

Can I avoid paying tax on Social Security by not claiming it?

Yes. If you do not claim Social Security, you have no Social Security income and no combined income from it, so there is no tax to owe on benefits. However, delaying your claim means a smaller monthly benefit in the years you do not claim. The trade-off is worth it for some people and not for others, depending on your health and other income.

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

Not usually. If Social Security is your only income and it is below the filing threshold for your age and filing status, you do not have to file. However, if you had taxes withheld from your Social Security, filing a return may get you a refund. Check the IRS filing requirements for your age and status.

What if I live abroad and receive Social Security?

You still owe U.S. federal income tax on your Social Security if your combined income exceeds the threshold, even if you live outside the United States. However, you may be able to exclude foreign earned income from taxation under the Foreign Earned Income Exclusion. Consult a tax preparer who handles expatriate returns.

Does my spouse's Social Security count toward my combined income?

No. Each person calculates combined income separately, even if you file a joint return. Your spouse's Social Security and income are used only in their calculation. However, if you file jointly, the threshold is higher ($32,000 instead of $25,000), which can reduce taxation for both of you.

If I owe tax on Social Security, can I pay it when I file my return instead of withholding?

Yes. You can let tax accrue throughout the year and pay it all when you file your return in April, or you can make quarterly estimated payments. Some people prefer this if they want to keep their full monthly Social Security payment. Just make sure you have the money set aside to pay the bill when it is due.