Whether your Social Security is taxed depends on your other income

The federal government taxes some or all of your Social Security benefits if your combined income exceeds a certain threshold. Combined income is not just your wages—it includes half of your Social Security benefits plus any interest, dividends, pensions, or other income you receive. The threshold is the same whether you're single or married filing jointly, but married couples filing separately face a much lower threshold.

If your combined income stays below the threshold for your filing status, you pay no federal tax on your Social Security. If it exceeds the threshold, you may owe tax on up to 50 percent or up to 85 percent of your benefits, depending on how far over the threshold you go. State taxes are separate—some states tax Social Security, others don't, and the rules vary.

Key Takeaways

  • Combined income (half your Social Security plus all other income) determines whether your benefits are taxed; the threshold is $25,000 for single filers and $32,000 for married couples filing jointly.
  • If your combined income exceeds the threshold, you may owe federal tax on 50 to 85 percent of your benefits, calculated using a worksheet or tax software.
  • Some states tax Social Security benefits and others don't; check your state's rules separately from federal rules.
  • You can reduce your combined income by earning less, taking distributions from traditional IRAs or 401(k)s strategically, or delaying Social Security if you haven't started yet.

The income thresholds that trigger taxation

The IRS uses two thresholds. If your combined income is below the first threshold, you owe no federal tax on your Social Security. If it falls between the first and second threshold, you may owe tax on up to 50 percent of your benefits. If it exceeds the second threshold, you may owe tax on up to 85 percent of your benefits.

For single filers, the first threshold is $25,000 and the second is $34,000. For married couples filing jointly, the first threshold is $32,000 and the second is $44,000. Married couples filing separately face thresholds of $0 and $9,000—meaning almost any income will trigger taxation. These thresholds have not changed since 1984, so they affect more people each year as wages and benefits rise.

Combined income is calculated as your adjusted gross income (AGI) plus nontaxable interest plus half your Social Security benefits. If you have a pension from work not covered by Social Security, you may also add back certain deductions. The IRS provides a worksheet in Publication 915 to calculate the exact amount.

How to calculate the tax you owe on benefits

The calculation has two steps. First, you determine how much of your benefits are taxable—the amount subject to tax. Second, you include that taxable amount in your income and calculate your total tax bill.

The taxable portion depends on how far your combined income exceeds the threshold. If you're single and your combined income is $30,000, you're $5,000 over the first threshold of $25,000. You take the smaller of (a) half the amount over the threshold ($2,500) or (b) half your total Social Security benefits. That smaller amount is taxable. If your combined income exceeds the second threshold, the calculation is more complex and can result in up to 85 percent of your benefits being taxable.

Most people use tax software or a tax professional to run these numbers because the worksheet is tedious and straightforward to get wrong. The IRS Publication 915 walks through the calculation step by step if you want to do it by hand. Your Social Security statement (available at ssa.gov) shows your annual benefit amount, which you'll need for the calculation.

State taxes on Social Security benefits

Thirteen states tax Social Security benefits to some degree: Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, Vermont, and West Virginia. The rules vary widely—some states follow the federal thresholds, others use their own, and some tax only a portion of benefits.

Colorado, Kansas, and Missouri have phased out their taxes on Social Security, so they currently tax very little or none. Connecticut, Minnesota, and Utah tax benefits above a certain income level but exempt lower-income retirees. Nebraska and Vermont tax benefits as ordinary income. West Virginia and New Mexico have their own thresholds and percentages.

If you live in a state that taxes Social Security, you'll need to file a state return and calculate state tax separately from federal tax. Your tax software will usually handle this if you enter your state correctly. If you moved to a new state in retirement, check that state's rules—you may have moved to a state with lower or no Social Security tax.

Ways to reduce the amount of your benefits that get taxed

If your combined income is close to a threshold, small changes can make a difference. One common strategy is to delay taking Social Security if you haven't started yet. Delaying increases your monthly benefit and gives you time to reduce other income sources, which may lower your combined income when you do claim.

If you're still working, earning less in a given year lowers your combined income directly. If you have a traditional IRA or 401(k), you can time withdrawals to spread income across years rather than taking a large lump sum. Roth conversions (moving money from a traditional IRA to a Roth) increase your income in the conversion year but may lower it in future years, so the timing matters.

Some people use may have access to charitable distributions if they're over 70½ and have an IRA. A QCD lets you transfer money directly from your IRA to a charity without counting it as income, which lowers your combined income without reducing your charitable giving. You must work with your IRA custodian to set this up correctly.

If you have significant nontaxable interest (from municipal bonds, for example), that still counts toward your combined income for Social Security tax purposes, so it can't be avoided. But understanding what counts helps you see where you have room to maneuver.

What happens if you owe tax on your benefits

You report the taxable portion of your Social Security on your federal tax return using Form 1040 and Schedule 1. The IRS does not withhold tax from your Social Security check automatically unless you request it. If you know you'll owe tax, you can ask Social Security to withhold a percentage of your monthly benefit, which reduces the check you receive but covers some or all of your tax bill.

To request withholding, 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, 15, or 25 percent of your benefit. If you don't request withholding and owe tax at the end of the year, you'll owe it when you file your return.

If you owe a large amount, you may also make quarterly estimated tax payments to the IRS. This is common for people with pensions, investment income, or other sources of income in addition to Social Security. Your tax software or a tax professional can tell you whether you need to make estimated payments.

Frequently Asked Questions

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

No. The tax is based on the total amount of benefits you receive in a year, not how you receive them. If you're may have access to to $24,000 a year, that's your combined income figure whether you take it monthly or in a lump sum. However, delaying when you start Social Security altogether can help, because you'll have fewer years of benefits and more time to reduce other income.

Does my spouse's income count toward my Social Security tax threshold?

Only if you file jointly. If you're married and file separately, you use your own income only, but your threshold drops to nearly zero, so you'll almost certainly owe tax. Filing jointly is almost always better for couples in this situation.

What if I worked for a government employer and have a pension but no Social Security?

You may still owe tax on Social Security if you have a spouse who receives benefits and you file jointly. You'll also add back certain deductions related to your government pension when calculating combined income. Publication 915 has a separate worksheet for this situation.

Do I have to pay tax on Social Security if I'm still working?

Yes, if your combined income exceeds the threshold. Your wages count as part of combined income. However, if you're under full retirement age and still working, Social Security reduces your benefit by $1 for every $2 you earn above an annual limit (the limit changes yearly). That reduction happens before tax is calculated.

Will the Social Security tax thresholds ever increase?

Congress would have to pass new legislation to raise them. The thresholds have been frozen since 1984, so they affect more people each year as incomes rise. There's no set schedule for an increase, so you should plan based on current thresholds.