To pay no federal tax on Social Security benefits, your provisional income has to stay at or below $25,000 if you file single, or $32,000 if you file jointly.1Office of the Law Revision Counsel. 26 USC 86 – Social Security and Tier 1 Railroad Retirement Benefits Above those lines, up to 50% and then up to 85% of your benefits become taxable. Every strategy for zero tax comes down to keeping the number that feeds this formula below the threshold.
These dollar amounts have not been adjusted for inflation since they were set in the 1980s and 1990s, so the target has effectively tightened over time. A retiree with modest pension and investment income today can cross the line much more easily than one in the same position decades ago.
What Counts as Provisional Income
Provisional income is not your adjusted gross income, and the difference is where most retirees miscalculate. The IRS walks through the formula in Publication 915:2Internal Revenue Service. Publication 915 (2025), Social Security and Equivalent Railroad Retirement Benefits
- All your taxable income except Social Security: pensions, wages, interest, dividends, capital gains, rental income, and any other taxable source.
- All your tax-exempt interest, including interest from municipal bonds.
- Half of your annual Social Security benefits.
Add those three, and that sum is your provisional income. The tax-exempt interest line is the one that catches people. Municipal bond interest is exempt from regular income tax, but it still counts here in full. Retirees who load up on munis expecting to stay invisible to the IRS often find those bonds are exactly what pushes them into taxation.
A concrete example: $18,000 in pension income, $4,000 in municipal bond interest, and $20,000 in Social Security benefits produces $18,000 + $4,000 + $10,000 = $32,000 in provisional income. A joint filer at that number sits right at the edge of the zero-tax zone. A single filer at the same number is already in the 50% tier.
If you claim the foreign earned income exclusion (up to $132,900 for 2026), the excluded amount is also added back into provisional income.3Internal Revenue Service. Foreign Earned Income Exclusion
Draw From Sources That Do Not Feed the Formula
The core move is to fund your retirement spending from sources that never show up in the provisional income calculation. That means Roth accounts and the principal side of taxable investments.
Roth Withdrawals
Qualified withdrawals from Roth IRAs and Roth 401(k)s do not appear in adjusted gross income and do not count toward provisional income.4Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs This is the single most powerful lever for retirees aiming at zero tax on benefits. If you need $40,000 a year to live and $25,000 of it comes from a Roth, only the remaining $15,000 has to fit under the threshold along with half your benefits.
Principal From a Brokerage Account
Spending down the original cost basis in a taxable brokerage account is not income. Only the realized gains from selling appreciated positions add to your AGI. Selling deliberately, and leaving unrealized gains alone, gives you a way to fund spending without adding to the formula.
Front-Load Withdrawals Before Benefits Start
If you retire at 62 but delay Social Security until 67 or 70, those in-between years have no benefits to protect. You can take larger distributions from traditional IRAs and 401(k)s during that window, pay the income tax, and shrink the traditional balance that would otherwise generate taxable required minimum distributions later. Smaller balances mean smaller future RMDs, which means lower future provisional income once benefits begin.
Roth Conversions in the Gap Years
The same window works for Roth conversions. Converting traditional IRA or 401(k) money to Roth is taxable in the conversion year, but it permanently moves that money out of accounts that will generate mandatory distributions. RMDs generally begin at age 73 (rising to 75 in 2033 under SECURE 2.0), and they are fully taxable and fully counted in provisional income.4Internal Revenue Service. Retirement Plan and IRA Required Minimum Distributions FAQs
The ideal conversion window is often the years between retirement and age 73, when you may be in a lower bracket and haven’t yet claimed benefits. Converting too aggressively in a single year can push you into a higher bracket and, as discussed below, trigger Medicare surcharges. Spreading conversions across several years usually works better than one large one.
Qualified Charitable Distributions
If you are at least 70½ and give to charity anyway, a qualified charitable distribution routes money directly from your IRA to a qualified charity, up to $111,000 in 2026.5Congressional Research Service. Qualified Charitable Distributions from Individual Retirement Arrangements The money never hits your tax return as income, so it stays out of provisional income entirely.
A QCD can also satisfy your RMD for the year. An $8,000 RMD paid out as an $8,000 QCD meets the distribution requirement without adding a dollar to the formula.6Internal Revenue Service. Seniors Can Reduce Their Tax Burden by Donating to Charity Through Their IRA For charitably inclined retirees near the threshold, this is one of the cleanest tools available.
Reconsider Municipal Bonds
Because muni bond interest counts toward provisional income even though it’s federally tax-exempt, a heavy muni allocation can quietly push benefits into the taxable zone. For retirees near the threshold, investments producing qualified dividends and long-term capital gains often offer a better profile. Those income types are taxed at 0% for taxpayers in the lower brackets, and you control the timing of gains by choosing when to sell. Bond interest arrives on its own schedule.
The Married Filing Separately Trap
Married couples who file separately and lived together at any point during the year face a base amount of $0.1Office of the Law Revision Counsel. 26 USC 86 – Social Security and Tier 1 Railroad Retirement Benefits Up to 85% of Social Security benefits become taxable on essentially the first dollar of other income. There is no path to zero tax on your benefits with a separate return in this situation.
Couples who lived apart for the entire year get treated as single filers with the $25,000 base amount, but the IRS interprets “at any time” broadly. Separate filing is sometimes attractive for reasons like limiting exposure to a spouse’s tax debt or managing student loan payments, but on Social Security taxation the trade-off is severe.
Watch the Medicare Side Effect
The strategies that keep provisional income low also help you avoid Medicare’s Income-Related Monthly Adjustment Amounts. IRMAA surcharges are based on your modified adjusted gross income from two years prior, so your 2024 return sets your 2026 premiums.7Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles
For 2026, the standard Part B premium is $202.90 per month. Single filers with MAGI above $109,000, and joint filers above $218,000, start paying surcharges on Part B and Part D. The first tier above those thresholds adds roughly $1,148 per person per year. At the highest income levels, the extra cost can approach $7,000 per person annually.7Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles
This is the specific danger of a big one-year Roth conversion. Even if the conversion ultimately helps your Social Security tax picture, a spike in a single year can trigger IRMAA two years later. Spreading conversions across multiple years is usually the safer path.
State Tax Still May Apply
Zeroing out federal tax on your benefits doesn’t automatically mean your state agrees. Most states with an income tax exempt Social Security entirely, but as of 2026 eight still tax it to some degree: Colorado, Connecticut, Minnesota, Montana, New Mexico, Rhode Island, Utah, and Vermont. Kansas, Missouri, and Nebraska eliminated their Social Security taxes in 2024, and West Virginia completed its phaseout to full exemption in 2026.
Rules in the remaining eight vary. Some mirror the federal provisional income thresholds; others use their own income-based exemptions. Colorado lets retirees 65 and older deduct all of their federally taxed Social Security income. Connecticut exempts benefits entirely for single filers with AGI below $75,000 and joint filers below $100,000. If you live in one of these states, look up the specific thresholds and deductions before assuming any state liability follows from your federal picture.