How the IRS taxes your Social Security benefits
Whether your Social Security is taxed depends on your combined income — not just what you receive from Social Security. The IRS uses a formula that adds half your Social Security benefit to your other income (wages, pensions, interest, dividends) and compares that total to a threshold. If you cross the threshold, a portion of your benefits becomes taxable income on your federal return.
The thresholds are the same in 2023 as they have been since 1984: $25,000 for single filers and $32,000 for married couples filing jointly. These thresholds do not adjust for inflation, which means more people pay tax on their benefits each year. If your combined income falls below the threshold, none of your Social Security is taxed.
The tax applies only to your federal return. Social Security itself is not withheld — you pay the tax when you file, or you can ask Social Security to withhold a flat amount from your monthly check to cover estimated tax.
Key Takeaways
- Combined income is half your Social Security benefit plus all other income; if it exceeds $25,000 (single) or $32,000 (married filing jointly), some benefits are taxable.
- Up to 50 percent of your benefits can be taxed if your combined income is between the first threshold and a second threshold ($34,000 for single, $44,000 for married).
- Up to 85 percent of your benefits can be taxed if your combined income exceeds the second threshold.
- The IRS worksheets in Publication 915 walk through the calculation step by step, and most tax software handles it automatically.
The two-tier tax formula: 50 percent and 85 percent
The tax on Social Security benefits works in two tiers. The first tier taxes up to 50 percent of your benefits. The second tier taxes up to 85 percent. Most people fall into the first tier; fewer reach the second.
First tier (50 percent): If your combined income is above $25,000 (single) or $32,000 (married filing jointly) but below $34,000 (single) or $44,000 (married filing jointly), the IRS taxes the lesser of two amounts: either half the amount you are over the first threshold, or half your total Social Security benefit. Whichever is smaller is what gets taxed.
Second tier (85 percent): If your combined income exceeds $34,000 (single) or $44,000 (married filing jointly), you pay tax on the greater of two amounts: either 85 percent of the amount over the second threshold, plus any tax from the first tier, or 85 percent of your total Social Security benefit. Again, whichever is smaller applies. The maximum taxable amount is 85 percent of what you received.
The reason for two tiers is historical: Congress added the second tier in 1993 to fund part of Medicare. The thresholds have not changed since then, even though wages and benefits have risen significantly.
Step-by-step calculation for 2023
Here is how to work through the formula yourself. You will need your 2023 Social Security statement (Form SSA-1099), your W-2 or 1099 forms, and a record of any other income.
| Step | What to do |
|---|---|
| 1 | Add up all income: wages, self-employment income, pensions, interest, dividends, capital gains, and any other taxable income. Do not include Social Security yet. |
| 2 | Take half your total Social Security benefit for the year and add it to the income from Step 1. This is your combined income. |
| 3 | Compare combined income to the first threshold ($25,000 single / $32,000 married filing jointly). If it is below, stop — no tax on benefits. |
| 4 | If combined income exceeds the first threshold, subtract the threshold from combined income. Take half that result, or half your total benefit — whichever is smaller. This is your taxable amount from tier one (maximum 50 percent of benefits). |
| 5 | Compare combined income to the second threshold ($34,000 single / $44,000 married filing jointly). If it does not exceed the second threshold, stop — your taxable amount is what you calculated in Step 4. |
| 6 | If combined income exceeds the second threshold, subtract the second threshold from combined income. Take 85 percent of that result. Add the amount from Step 4. Compare this total to 85 percent of your total benefit. Use whichever is smaller. This is your total taxable amount. |
The IRS provides a detailed worksheet in Publication 915 (Social Security Benefits) that walks through each step with lines to fill in. Most tax software (TurboTax, H&R Block, TaxAct) calculates this automatically once you enter your Social Security and other income.
Real example: Single filer with $30,000 combined income
Suppose you are single, received $18,000 in Social Security in 2023, and have $21,000 in pension income. Your combined income is $21,000 + (half of $18,000) = $21,000 + $9,000 = $30,000.
Your combined income of $30,000 exceeds the first threshold of $25,000 by $5,000. Half of $5,000 is $2,500. Half your total benefit is $9,000. The smaller amount is $2,500, so $2,500 of your Social Security is taxable. You do not reach the second threshold, so the calculation stops here.
If your tax bracket is 12 percent, you would owe approximately $300 in federal tax on that $2,500 of benefits. The remaining $15,500 of your Social Security stays tax-free.
Real example: Married couple filing jointly with $50,000 combined income
Suppose you and your spouse are married filing jointly. Together you received $24,000 in Social Security, and you have $26,000 in combined wages and interest. Your combined income is $26,000 + (half of $24,000) = $26,000 + $12,000 = $38,000.
Your combined income of $38,000 exceeds the first threshold of $32,000 by $6,000. Half of $6,000 is $3,000. Half your total benefit is $12,000. The smaller amount is $3,000, so you calculate $3,000 from tier one.
Your combined income of $38,000 also exceeds the second threshold of $44,000 — wait, it does not. $38,000 is below $44,000, so you stop here. Your taxable amount is $3,000. At a 12 percent bracket, that is roughly $360 in tax.
What counts as income for this calculation
The IRS includes most forms of income in the combined income total. Wages from work count. Pensions count. Interest and dividends count. Capital gains count. Rental income counts. Self-employment income counts. Distributions from IRAs and 401(k)s count.
Some income does not count. Municipal bond interest (interest from bonds issued by states and cities) is excluded. Roth IRA conversions are a gray area — the rules changed in 2022, and you should check Publication 915 or speak with a tax professional if you did a conversion. Supplemental Security Income (SSI) does not count because it is a separate program.
If you are married filing separately, the thresholds are $0 — meaning any combined income at all can trigger taxation of benefits. This is why married couples almost always file jointly if one or both receive Social Security.
Withholding and estimated tax payments
Social Security does not automatically withhold federal tax from your monthly benefit. If you expect to owe tax, you have two options.
Option 1: Request withholding from Social Security. You can ask Social Security to withhold a flat amount each month — $10, $25, $50, or $100. You do this by completing Form W-4V and sending it to your local Social Security office or mailing it to Social Security. The withholding is not calculated based on your actual tax; it is a fixed amount you choose. This is straightforward but may not match what you actually owe.
Option 2: Make estimated tax payments. If you have other income (wages, pensions, interest), your employer or financial institution may already be withholding enough tax to cover your Social Security tax as well. If not, you can make quarterly estimated tax payments to the IRS using Form 1040-ES. This is more precise but requires you to calculate and pay four times a year.
If you do not withhold or pay estimated tax and end up owing a large amount, you may owe penalties and interest when you file your return. Withholding a modest amount from Social Security is often the easiest way to avoid that surprise.
Frequently Asked Questions
Does my state tax Social Security benefits?
Most states do not tax Social Security. However, Colorado, Connecticut, Kansas, Minnesota, Missouri, Montana, Nebraska, New Mexico, Rhode Island, Utah, and Vermont do tax some or all benefits, usually based on income thresholds similar to the federal ones. Check your state's tax agency website or ask a tax professional if you live in one of these states.
If I work and receive Social Security, does my wage income count toward the combined income threshold?
Yes. Wages count as income in the combined income calculation. If you are still working and receiving Social Security, your combined income will likely be higher, which means more of your benefits may be taxed. This is separate from the earnings test, which reduces your benefit if you earn above a certain amount before your full retirement age.
Can I reduce my combined income to avoid taxation of benefits?
You can reduce taxable income by contributing to a traditional IRA (if you are not covered by a workplace retirement plan) or by timing capital gains and losses. However, the thresholds are low and have not changed since 1984, so most people with moderate income will have some benefits taxed. A tax professional can review your specific situation.
What if I received Social Security for only part of 2023?
You report only the Social Security you actually received on your tax return. If you started benefits mid-year, your annual total will be lower, which may lower your combined income and reduce the tax on benefits. Use the amount shown on your Form SSA-1099.
Do I have to file a tax return if my only income is Social Security?
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 have other income or if some of your benefits are taxable, you must file. The IRS filing thresholds are higher than the Social Security tax thresholds, so it is possible to owe tax on benefits without owing income tax overall.