Social Security benefits can be taxable income, depending on your total income and filing status

Whether you owe federal income tax on your Social Security benefits depends on how much other income you have. The IRS uses a formula called combined income to decide this. Combined income is your adjusted gross income plus nontaxable interest plus half of your Social Security benefits. If your combined income exceeds a certain threshold, you must include part of your benefits as taxable income on your federal return.

The thresholds vary by filing status and have not changed since 1984. For a single filer, the first threshold is $25,000; for married filing jointly, it is $32,000. If your combined income 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 ($34,000 for single filers, $44,000 for married filing jointly), you may owe tax on up to 85 percent of your benefits.

State and local taxes are separate. Some states do not tax Social Security at all. Others tax it the same way the federal government does, or tax it only if your income exceeds a higher threshold. You need to check your state's rules directly, because they vary widely.

Key Takeaways

  • Combined income — your regular income plus half your Social Security benefits — determines whether any of your benefits are taxable.
  • The federal thresholds are $25,000 for single filers and $32,000 for married filing jointly; these have not changed since 1984.
  • If you exceed the first threshold, up to 50 percent of your benefits become taxable; if you exceed the second threshold, up to 85 percent can be taxable.
  • State taxes on Social Security vary: some states tax it, some do not, and some use different thresholds than the federal government.
  • You do not have to pay Social Security tax (the 12.4 percent payroll tax) on benefits you receive; that tax applies only to wages you earn.

How the IRS calculates combined income

Combined income is not the same as your adjusted gross income (AGI). To find your combined income, start with your AGI, add back any tax-exempt interest (usually from municipal bonds), and add half of your Social Security benefits for the year. That total is what the IRS compares to the thresholds.

The reason the IRS includes half your benefits in the calculation is historical: when Social Security taxation began in 1984, Congress decided that only the portion of benefits that exceeded what you had paid in taxes should be taxable. Since you and your employer each paid half the payroll tax during your working years, half the benefit was considered a return of your own contribution.

If you are married and file jointly, you and your spouse's incomes are combined for this calculation. If you are married and file separately, the threshold drops to $0 — meaning any Social Security benefits are likely taxable. Divorced individuals who did not remarry use the single filer threshold.

What happens if your combined income crosses a threshold

If your combined income is below $25,000 (single) or $32,000 (married filing jointly), none of your Social Security benefits are taxable. You still report the benefits on your return, but you do not owe tax on them.

If your combined income is between $25,000 and $34,000 (single) or between $32,000 and $44,000 (married filing jointly), you calculate taxable benefits using IRS worksheets or software. The formula is complex, but the result is that up to 50 percent of your benefits become taxable income. For example, if your combined income is $30,000 and you are single, roughly half the amount over $25,000 becomes taxable — in this case, about $2,500 of your benefits.

If your combined income exceeds $34,000 (single) or $44,000 (married filing jointly), you use a second calculation. Up to 85 percent of your benefits can become taxable. This is the maximum; you will never owe tax on more than 85 percent of what you received, even if your income is very high.

Income sources that count toward the threshold

Combined income includes wages, self-employment income, pensions, interest, dividends, capital gains, and distributions from retirement accounts like IRAs and 401(k)s. It also includes rental income, royalties, and income from a business or farm.

Some income does not count. Supplemental Security Income (SSI) is not included. Veterans benefits are not included. Certain railroad retirement benefits are not included. Roth IRA conversions and may have access to distributions from Roth IRAs do not count, but non-may have access to distributions do.

If you are still working and receiving Social Security before full retirement age, your wages count toward combined income. There is also a separate earnings limit — if you earn more than a certain amount before reaching full retirement age, Social Security reduces your monthly benefit. That reduction is separate from taxation and is handled by Social Security, not the IRS.

State and local taxation of Social Security

Thirteen states currently tax Social Security benefits to some degree: Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, Vermont, and West Virginia. Illinois taxes benefits only if you are over 61 and have income above a threshold. Each state uses its own rules.

Some states use the same federal thresholds. Others use higher thresholds or exclude benefits entirely for residents over a certain age. A few states tax only the portion of benefits that the federal government taxes. You need to check your state's Department of Revenue website or consult a tax preparer familiar with your state's rules.

If you live in a state that does not tax Social Security, you still owe federal tax if your combined income exceeds the federal threshold. State and federal taxation are independent calculations.

How to report Social Security on your tax return

Social Security benefits appear on Form SSA-1099, which you receive by January 31 each year. The form shows the total benefits you received in the prior year. You report this amount on your federal return using Form 1040 and the Social Security benefits worksheet.

If none of your benefits are taxable, you still report the total on your return. The IRS uses this information to verify your income and cross-check with Social Security records. If some or all of your benefits are taxable, you calculate the taxable portion using IRS worksheets (in the Form 1040 instructions) or tax software, then enter the taxable amount on your return.

If you owe tax on your benefits, you can pay it with your return or arrange to have taxes withheld from your monthly benefit. To request withholding, contact Social Security directly or complete Form W-4V and send it to your local Social Security office. Withholding does not reduce the amount you receive; it simply sets aside money for taxes.

Planning to reduce taxable benefits

If your combined income is close to a threshold, you may be able to reduce taxable benefits by managing other income. Strategies include delaying retirement account withdrawals, timing the sale of investments, or bunching deductible expenses into a single year. These approaches work only if you have control over the timing of the income.

Roth conversions can affect your combined income in the year of conversion, so timing matters if you are near a threshold. may have access to charitable distributions from IRAs (available to people 70½ and older) do not count as income and do not increase your combined income, making them useful for charitable donors.

If you are still working, reducing your wages below the earnings limit can lower your combined income, though Social Security will also reduce your monthly benefit. A tax professional can model different scenarios to show you the trade-offs.

Frequently Asked Questions

Do I have to pay Social Security tax on my benefits?

No. Social Security tax (the 12.4 percent payroll tax) applies only to wages you earn from work. Once you start receiving benefits, you do not pay Social Security tax on them. You may owe federal income tax, depending on your other income, but that is different from Social Security tax.

What if I have very little income besides Social Security?

If your combined income is below the first threshold for your filing status, none of your benefits are taxable. For example, if you are single and have only Social Security income and no other earnings or investment income, you will not owe federal income tax on your benefits.

Can I reduce my taxable benefits by giving money to charity?

Charitable donations reduce your adjusted gross income only if you itemize deductions instead of taking the standard deduction. If you take the standard deduction (which most people do), charitable giving does not lower your combined income or your taxable benefits. A may have access to charitable distribution from an IRA is an exception — it does not count as income.

If I delay claiming Social Security, will fewer of my benefits be taxable?

Delaying does not change the tax treatment of benefits. The thresholds and percentages remain the same. However, delaying increases your monthly benefit amount, which increases your combined income, potentially making more of your benefits taxable. The trade-off depends on your other income sources.

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

Not necessarily. If your combined income is below the threshold and none of your benefits are taxable, you may not be required to file. However, you might want to file anyway if you are due a refund from taxes withheld or if you may have access to for the Earned Income Tax Credit or other refundable credits.