Whether Your Benefits Are Taxed Depends on Your Other Income

Social Security benefits may or may not be taxed, depending on how much other income you have. The IRS uses a formula called "combined income" to decide. If your combined income stays below a certain threshold, your benefits are not taxed at all. If it goes above that threshold, you may owe federal income tax on part of your benefits — but never on all of them.

Combined income means your adjusted gross income, plus any non-taxable interest, plus half of your Social Security benefits. This is the number that determines your tax situation, not your total benefits alone.

Key Takeaways

  • Combined income — not just your Social Security amount — determines whether benefits are taxed, and combined income includes half your benefits plus your other income.
  • Single filers with combined income under $25,000 and married filers filing jointly under $32,000 pay no federal tax on benefits.
  • Between those thresholds and a higher limit, up to 50 percent of your benefits may be taxed; above the higher limit, up to 85 percent may be taxed.
  • State income tax on Social Security varies by state — some states do not tax benefits at all, while others follow federal rules or have their own thresholds.
  • You can ask the Social Security Administration to withhold federal income tax from your monthly payment if you expect to owe tax.

The Income Thresholds That Trigger Taxation

The IRS sets two combined income thresholds. If you are single and your combined income is under $25,000, none of your benefits are taxed. If it is between $25,000 and $34,000, up to 50 percent of your benefits may be taxed. If it is $34,000 or more, up to 85 percent may be taxed.

If you are married filing jointly, the thresholds are higher: $32,000 and $44,000. Married filing separately uses $0 and $9,000, which means nearly all married couples filing separately will have some benefits taxed.

These thresholds have not changed since 1984, so they affect more people now than they did when they were first set. A modest pension, part-time work, or investment income can push you over the first threshold even if your Social Security benefit is small.

How Much of Your Benefits Gets Taxed

The tax calculation is not straightforward because it uses a two-tier system. Between the first and second threshold, you pay tax on the lesser of two amounts: either 50 percent of your benefits, or 50 percent of the amount your combined income exceeds the first threshold.

Above the second threshold, the calculation adds a second tier. You pay tax on the lesser of two amounts: either 85 percent of your benefits, or the sum of (1) 85 percent of the amount your combined income exceeds the second threshold, plus (2) the amount already taxed under the first tier. This means the maximum percentage of your benefits that can be taxed is 85 percent, never 100 percent.

Because the math is complex, the IRS provides a worksheet in Publication 915 to help you calculate the taxable amount. Many tax software programs also include this calculation.

State Income Tax on Social Security

Federal taxation and state taxation are separate. 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 other states do not tax Social Security at all.

Of the states that do tax benefits, most follow the federal thresholds and rules, though some have their own income limits or exclude certain types of income. A few states tax only the portion that is taxable under federal law. If you live in one of these states and your benefits are taxed federally, you should check your state's rules or contact your state tax authority to see whether you owe state tax as well.

How to Handle Taxes on Your Benefits

You have three options. First, you can do nothing and pay the tax when you file your annual return. Second, you can request that the Social Security Administration withhold federal income tax from your monthly payment. Third, you can make quarterly estimated tax payments to the IRS if you prefer to pay throughout the year rather than in a lump sum at tax time.

To request withholding, you fill out Form W-4V and send it to your local Social Security office or mail it to the Social Security Administration. You can choose to have 7, 10, 12, or 22 percent of your monthly benefit withheld. This withholding is not mandatory — it is a convenience if you want to avoid a large tax bill in April.

If you have other income sources, such as a pension or part-time wages, you may already be having tax withheld from those payments. In that case, you might not need additional withholding from Social Security.

What Counts as Income for the Combined Income Test

Combined income includes your adjusted gross income (wages, self-employment income, pensions, annuities, capital gains, and other taxable income), plus tax-exempt interest (such as interest from municipal bonds), plus half your Social Security benefits. It does not include certain types of income, such as Supplemental Security Income (SSI) or Medicaid payments.

If you are still working, your wages count toward combined income. If you have a pension from a job where you did not pay Social Security tax, that pension counts too. If you have investment income, dividends, or rental income, those all count. The key is that almost any income you report on your tax return, plus tax-exempt interest, goes into the combined income calculation.

Planning Ahead to Reduce Taxes on Benefits

If you know you will have a year with high income — for example, if you sell a rental property or take a large distribution from a retirement account — you might want to delay claiming Social Security until the following year, when your income may be lower. Conversely, if you have a year with unusually low income, that might be a good year to claim.

Some people coordinate the timing of retirement account withdrawals with Social Security claiming to keep combined income below the first threshold. Others use tax-exempt bonds or other strategies to reduce taxable income. A tax professional or financial planner can help you model different scenarios based on your specific situation.

Keep in mind that delaying Social Security increases your monthly benefit amount, so the trade-off is not just about taxes in one year — it affects your lifetime benefits as well.

Frequently Asked Questions

Can I avoid taxes on my benefits by not claiming them?

No. Once you start receiving Social Security, the IRS considers you to have received the income, whether or not you spend it. The only way to avoid taxation is to keep your combined income below the first threshold, which means reducing other income sources or delaying your claim.

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

Not necessarily. If Social Security is your only income and none of it is taxed, you generally do not have to file. However, if you have other income or if some of your benefits are taxed, you may need to file. The IRS provides a worksheet to determine whether you must file.

What if I receive both Social Security and SSI?

SSI (Supplemental Security Income) does not count toward combined income for the taxation test. Only your Social Security benefits count. However, SSI and Social Security are separate programs with different rules, so contact the Social Security Administration if you receive both.

Can I change my withholding amount after I request it?

Yes. You can submit a new Form W-4V at any time to change the percentage withheld, or to stop withholding altogether. Changes usually take effect within one or two months.

Does my spouse's income affect whether my benefits are taxed?

Only if you file jointly. If you file jointly, your combined income includes both your income and your spouse's income. If you file separately, each person's combined income is calculated individually, though married filing separately triggers taxation at much lower thresholds.