How Social Security Benefits Are Taxed in 2026

Published August 11, 2026 · 9 min read

Most retirees are surprised to learn that their Social Security benefits can be taxable. You spent decades paying into the system — and now the IRS wants a cut of what you get back? It feels counterintuitive. But up to 85% of your Social Security benefits can be counted as taxable income, depending on your total income from all sources.

The good news: many retirees with modest incomes pay no tax on their Social Security at all. The threshold structure is designed so that only those with significant income beyond Social Security get taxed on their benefits. Here is exactly how it works.

The Three-Tier System: 0%, 50%, and 85%

The IRS determines how much of your Social Security is taxable using a concept called combined income (also called provisional income). Based on your combined income, your benefits fall into one of three tiers:

Source: IRS Topic 423 — Social Security and Equivalent Railroad Retirement Benefits

Note that “up to 85% taxable” does not mean you owe a tax rate of 85%. It means that up to 85% of your Social Security benefit amount gets added to your taxable income, and then your regular income tax rates apply to that amount. The maximum any individual can ever be taxed on is 85% of their benefits — never 100%.

What Is “Combined Income”?

Combined income (provisional income) is the key number. The formula is:

Adjusted Gross Income (AGI) is your total income before the standard deduction — it includes wages, pension income, 401(k) or IRA withdrawals, dividends, capital gains, rental income, and any other taxable income. It does not include your Social Security benefits themselves (those are handled separately).

Nontaxable interest is interest from municipal bonds and similar tax-exempt investments. Even though it is not directly taxable, the IRS counts it toward combined income for the Social Security calculation.

Notice that only half of your Social Security benefits count toward combined income. This is a built-in benefit — it reduces the calculation and keeps more of your benefits tax-free than if the full amount were counted.

Worked Example 1: Within the 50% Tier

Maria is a single retiree in 2026. She receives:

• Social Security benefits: $18,000/year
• Pension income: $20,000/year
• Bank interest: $0

Step 1 — Calculate combined income:

Step 2 — Determine the tier: $29,000 falls between $25,000 and $34,000 → up to 50% of benefits may be taxable.

Step 3 — Calculate the taxable amount:

Maria includes $2,000 of her $18,000 Social Security benefit as taxable income. The other $16,000 is tax-free. She pays income tax on a total of $22,000 ($20,000 pension + $2,000 SS) — minus her $15,000 standard deduction, her taxable income is just $7,000, and she pays just $700 in federal income tax.

Worked Example 2: In the 85% Tier

David is also a single retiree with more income sources:

• Social Security benefits: $24,000/year
• Traditional IRA withdrawals: $30,000/year
• Dividend income: $5,000/year

$47,000 exceeds $34,000 → up to 85% of benefits may be taxable. The exact calculation (per IRS Publication 915 Worksheet 1):

David includes $15,550 of his $24,000 Social Security benefit as taxable income — about 65% in this case, even though the maximum tier is 85%. His total taxable income before deductions is $35,000 + $15,550 = $50,550. After his $15,000 standard deduction, he pays tax on $35,550.

Why IRA and 401(k) Withdrawals Are the Biggest Factor

The single biggest driver of Social Security taxation for most retirees is withdrawals from traditional IRAs and 401(k)s. These are counted as ordinary income (AGI), which directly raises your combined income.

Once you turn 73, the IRS requires you to take Required Minimum Distributions (RMDs) from traditional accounts each year. (IRS — RMD FAQs) As your account balances grow, RMDs can push your combined income well above the $34,000 threshold, causing up to 85% of your Social Security to become taxable.

In contrast, Roth IRA withdrawals do not count toward AGI because you already paid taxes on those contributions. This is a key reason many financial planners recommend converting traditional IRA funds to a Roth IRA before retirement — qualified Roth distributions reduce your combined income and keep more of your Social Security benefit tax-free. (IRS — Roth IRAs)

How Other Income Sources Affect Your SS Tax (Single Filer, $20,000 in Benefits)

Assumes $20,000 in annual Social Security benefits, single filer, no nontaxable interest. Taxable amounts are approximate.

Do States Tax Social Security Benefits?

At the federal level, the rules above apply uniformly. At the state level, the picture varies significantly. As of 2026, the majority of states — including Florida, Texas, Illinois, Pennsylvania, and about two dozen others — do not tax Social Security benefits at all.

However, roughly a dozen states do tax Social Security to some extent, including Colorado, Connecticut, Kansas, Minnesota, Montana, New Mexico, North Dakota, Rhode Island, Utah, Vermont, and West Virginia. Each state has its own income thresholds, phase-outs, and rules. Some follow the federal formula; others use their own.

If you live in a state that taxes Social Security, check your state’s department of revenue website for the exact rules — many states have income thresholds above which the benefits become taxable, and some offer partial exemptions that reduce the impact significantly.

Strategies to Reduce Tax on Your Social Security

Since the amount of taxable SS depends on your combined income, anything that reduces your other income can reduce — or eliminate — the tax on your benefits:

1. Roth Conversions Before Retirement

Converting a traditional IRA to a Roth IRA during lower-income years (say, between retirement and age 70 when you start Social Security) can reduce your future RMDs and keep combined income lower throughout retirement. Yes, you pay taxes on the conversion — but you do so at a time you can control, potentially at lower rates.

2. Qualified Charitable Distributions (QCDs)

If you are 70½ or older, you can donate up to $105,000 per year (2026 limit) directly from your IRA to a qualified charity as a Qualified Charitable Distribution. This satisfies your RMD without adding the withdrawal to your AGI — directly reducing your combined income. (IRS — QCD FAQs)

3. Delay Social Security to Reduce Annual Benefit Taxation

Waiting until age 70 to claim Social Security increases your monthly benefit by about 8% per year past full retirement age. A higher monthly benefit with the same other income means a smaller proportion of benefits is taxable, and you get more total dollars. This only helps if combined income stays relatively constant. (SSA.gov — Delayed Retirement Credits)

4. Mind Your Muni Bonds

Municipal bond interest is tax-exempt at the federal level, but it is still counted in your combined income calculation. Retirees who hold large amounts of muni bonds may be surprised to find their “tax-free” interest is making their Social Security more taxable. This does not mean munis are a bad choice — just factor this into the overall calculation.

How to Have Taxes Withheld From Social Security

Social Security does not automatically withhold taxes from your benefit unless you request it. To avoid a large tax bill at filing time, you can choose to have federal income tax withheld from your monthly benefit using Form W-4V (Voluntary Withholding Request).

You can choose to have 7%, 10%, 12%, or 22% of your monthly Social Security withheld. Submit Form W-4V directly to your local Social Security office. (IRS — About Form W-4V)

Alternatively, you can make quarterly estimated tax payments using Form 1040-ES. The IRS has an online withholding estimator that can help you figure out the right amount. (IRS Tax Withholding Estimator)

Where Social Security Tax Appears on Your Tax Return

Each January, the Social Security Administration sends you a Social Security Benefit Statement (Form SSA-1099) showing how much you received during the year. You use this form to calculate the taxable portion on your tax return.

The taxable amount is entered on Line 6b of Form 1040 (Line 6a shows your total benefit, 6b shows the taxable portion). Tax software and the IRS worksheet in Publication 915 will walk you through the exact calculation based on your specific numbers.

The Bottom Line

Social Security benefits become taxable when your combined income — your AGI plus nontaxable interest plus half your SS benefits — exceeds $25,000 for single filers or $32,000 for married filing jointly. Once combined income exceeds $34,000 ($44,000 for couples), up to 85% of your benefits can be counted as taxable income.

The good news: only the portion you add to taxable income gets taxed at your ordinary income rates — and you still have your standard deduction working for you. Most retirees with modest total income pay little or no federal tax on their Social Security.

Planning matters. Managing IRA withdrawals, considering Roth conversions, and using Qualified Charitable Distributions can significantly reduce — or eliminate — the tax on your Social Security benefits. If you are approaching retirement, it is worth running the numbers a few years in advance.

Sources

• IRS — Topic 423: Social Security and Equivalent Railroad Retirement Benefits
• IRS — Publication 915: Social Security and Equivalent Railroad Retirement Benefits
• SSA.gov — Benefits Planner: Income Taxes And Your Social Security Benefits
• SSA.gov — Delayed Retirement Credits
• IRS — Required Minimum Distributions FAQs
• IRS — Qualified Charitable Distributions (QCDs)
• IRS — About Form W-4V, Voluntary Withholding Request
• IRS — Tax Withholding Estimator