Whether your Social Security is taxed depends on your other income

Social Security benefits themselves are never taxed by the federal government at the source — the SSA does not withhold income tax when you receive your check. But you may owe federal income tax on part or all of your benefits when you file your tax return, depending on how much other income you have that year. The IRS uses a formula based on your "combined income," which includes wages, interest, dividends, and half of your Social Security benefits.

Most people who receive only Social Security and have no other income pay no federal tax on their benefits. The problem arises when you also have earnings from work, a pension, investment income, or retirement account withdrawals. Even a modest amount of other income can push you into a tax bracket where some of your Social Security becomes taxable.

State taxes are a separate question. About a dozen states tax Social Security benefits under their own rules, even if the federal government does not. If you live in one of those states and owe federal tax on your benefits, you will likely owe state tax as well.

Key Takeaways

  • Your Social Security is taxable only if your combined income (wages, pensions, investments, plus half your benefits) exceeds a threshold set by the IRS, which varies by filing status.
  • If you are single and your combined income is between $25,000 and $34,000, you may owe tax on up to 50 percent of your benefits; above $34,000, up to 85 percent becomes taxable.
  • If you are married filing jointly, the thresholds are $32,000 and $44,000, with the same 50 and 85 percent brackets.
  • About 12 states also tax Social Security benefits under their own rules, so check your state's tax code if you live outside the majority that do not.
  • You can ask the SSA to withhold federal income tax from your benefits each month to avoid a large tax bill at filing time.

How the IRS calculates whether your benefits are taxable

The IRS does not simply add your Social Security to your other income and apply the standard tax rate. Instead, it uses a two-step formula that looks at your "combined income," which is your adjusted gross income plus non-taxable interest plus half of your Social Security benefits.

Once the IRS calculates your combined income, it compares that number to two thresholds. If you are single and your combined income is $25,000 or less, none of your Social Security is taxable. If it is between $25,000 and $34,000, up to 50 percent of your benefits may be taxable. If it exceeds $34,000, up to 85 percent of your benefits may be taxable.

For married couples filing jointly, the thresholds are higher: $32,000 and $44,000. The same 50 and 85 percent brackets apply. Married couples filing separately face much stricter rules and should consult a tax professional.

These thresholds have not changed since 1984 and 1993, so they do not adjust for inflation. That means more people cross into the taxable range each year, even if their actual spending power has not increased.

What counts toward your combined income

Combined income includes wages from employment, self-employment income, interest and dividends (even tax-exempt municipal bond interest counts), capital gains, rental income, and distributions from retirement accounts like IRAs and 401(k)s. It also includes half of your Social Security benefits.

Some income does not count. Supplemental Security Income (SSI) is not included in the combined income calculation. Neither are veterans' benefits, workers' compensation, or certain other government payments. If you receive a Roth IRA distribution, the distribution itself does not count, but any earnings within the Roth do.

Withdrawals from a traditional IRA or 401(k) are included in full, even if you do not need the money. This is a common surprise for people who delay taking Social Security until age 70 but then take a large retirement account withdrawal in the same year — the withdrawal can push them into a higher tax bracket on their benefits.

Withholding tax from your Social Security check

If you expect to owe federal income tax on your benefits, you can ask the SSA to withhold money from your check each month. This works the same way as withholding from a paycheck — you fill out a form, specify an amount or percentage, and the SSA deducts it before sending you your payment.

To set up withholding, you need to complete Form W-4V (Voluntary Withholding Request) and send it to your local Social Security office or mail it to the SSA. You can also request withholding when you first claim benefits. The SSA will not withhold automatically; you have to ask.

Withholding does not reduce the amount of tax you owe — it just spreads the payment across the year so you do not face a large bill in April. If you withhold too little, you will still owe the difference when you file. If you withhold too much, you will receive a refund.

State taxes on Social Security benefits

Most states do not tax Social Security benefits at all. However, about a dozen states do: Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, Vermont, and West Virginia. Each state has its own rules about which benefits are taxable and at what income level.

Some of these states exempt benefits for lower-income retirees or those over a certain age. For example, Colorado taxes benefits only for people with income above a threshold, and New Mexico exempts all Social Security benefits for residents over 55. You need to check your specific state's tax code or contact your state revenue department to know whether you owe state tax.

If you moved to a new state after you started receiving benefits, you may need to file a return in both your old state and your new state for the year you moved, depending on when the move occurred and each state's rules.

Planning ahead to reduce taxes on your benefits

If you are still working and considering when to claim Social Security, the timing of your claim affects how much of your benefits will be taxed. Claiming at 62 means lower monthly payments but also potentially lower combined income in those early years. Waiting until 70 means higher monthly payments but also higher combined income, which can push more of your benefits into the taxable range.

If you have flexibility in when you take retirement account withdrawals, consider spacing them across multiple years rather than taking a large lump sum in one year. A $50,000 withdrawal in a single year might push you into the 85 percent taxable bracket on your Social Security, but spreading it across two years at $25,000 each might keep you in the 50 percent bracket or lower.

Roth conversions (converting a traditional IRA to a Roth) increase your taxable income in the year of conversion, which can affect your Social Security taxation that year. If you are considering a conversion, do the math first to see whether the long-term tax savings outweigh the short-term hit to your Social Security taxation.

What to do if you receive a tax bill on your benefits

If you file your tax return and discover you owe tax on your Social Security benefits, you can pay it with your return or set up a payment plan with the IRS. You can also adjust your withholding going forward so that less tax is owed next year.

If you did not withhold any tax during the year and now owe a large amount, you may want to start withholding immediately using Form W-4V. You can also make estimated tax payments to the IRS if you prefer to pay in quarterly installments rather than waiting until next April.

Keep in mind that if your income situation changes — for example, you stop working or you receive a large inheritance — your tax situation may change too. It is worth reviewing your withholding each year, especially if your income is variable.

Frequently Asked Questions

Do I have to pay taxes on my Social Security if I am still working?

Only if your combined income (wages plus half your Social Security plus other income) exceeds the IRS threshold for your filing status. Many people who work part-time while receiving Social Security do not cross that threshold. Use the IRS worksheet or a tax professional to calculate your combined income for the year.

What if I did not withhold taxes and now owe money?

You can pay the full amount with your tax return, set up a payment plan with the IRS, or start withholding from your benefits going forward to reduce next year's bill. You can also make estimated tax payments to the IRS in quarterly installments if you prefer.

Can I reduce the amount of my Social Security that is taxed?

You cannot reduce the tax calculation itself, but you can reduce your combined income by spacing out retirement account withdrawals, delaying a Roth conversion to a lower-income year, or managing other sources of income. A tax professional can help you plan withdrawals to minimize taxation on your benefits.

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

If you file jointly, your combined incomes are added together for the purpose of calculating whether your benefits are taxable. If you file separately, each spouse's income is calculated individually, but the thresholds are much lower and the rules are stricter.

Are my benefits taxed if I live outside the United States?

Federal taxation rules apply the same way regardless of where you live. However, some countries have tax treaties with the United States that may affect your situation. If you live abroad, consult a tax professional familiar with expatriate taxation.