Social Security Benefits Taxability Calculator
Find out how much of your Social Security is subject to federal income tax. Enter your benefit amount and other income to see whether 0%, 50%, or 85% of your benefits are taxable — plus your state's treatment.
$2,000/month
Municipal bond interest — included in combined income but not taxed
54.2% of your Social Security is taxable
$13,000 of your $24,000 benefit is subject to federal income tax
- Other income (AGI excl. SS)
- $32,000
- + 50% of SS benefits
- $12,000
- Combined (provisional) income
- $44,000
Your combined income: $44,000
- Taxable SS amount
- $13,000
- Estimated federal tax on SS
- $1,560
- Effective rate on total SS benefit
- 6.5%
This is the additional federal tax caused by including your Social Security in taxable income, using 2025 brackets with standard deduction.
- Monthly SS benefit
- $2,000
- Monthly taxable portion
- $1,083
- Estimated monthly federal tax
- -$130
- Estimated monthly after federal tax
- $1,870
Your state does not tax Social Security benefits
No state income tax
- 1.Roth conversions before claiming — Convert traditional IRA/401(k) to Roth before you start Social Security. Roth withdrawals don't count toward combined income.
- 2.Manage withdrawal timing — Spread taxable retirement account withdrawals across years to stay below thresholds.
- 3.Use HSA funds for medical expenses — HSA withdrawals for qualified medical expenses are tax-free and don't add to combined income.
- 4.Consider tax-exempt bonds carefully — While municipal bond interest is income-tax-free, it still counts toward your combined income for SS taxation.
- 5.Qualified Charitable Distributions (QCDs) — If 70.5 or older, donate IRA funds directly to charity. QCDs satisfy RMDs without adding to combined income.
How Social Security Taxation Works
0% Threshold
If your combined income is below $25,000 (single) or $32,000 (MFJ), none of your Social Security is taxable.
50% Threshold
Between $25,000-$34,000 (single) or $32,000-$44,000 (MFJ), up to 50% of benefits may be taxable.
85% Maximum
Above $34,000 (single) or $44,000 (MFJ), up to 85% of your benefits can be taxed — never more than 85%.
State Varies
Most states exempt Social Security. Only 9 states may partially tax benefits, each with different rules and thresholds.
Frequently asked questions
How much of my Social Security is taxable?
It depends on your "combined income" — your AGI plus tax-exempt interest plus half of your SS benefits. For single filers, if combined income is under $25,000, none is taxable. Between $25,000 and $34,000, up to 50% may be taxable. Above $34,000, up to 85% may be taxable. For MFJ, the thresholds are $32,000 and $44,000.
What is "combined income" for SS taxation?
Combined income (provisional income) equals your AGI without Social Security, plus tax-exempt interest, plus 50% of your SS benefits. This formula from IRS Publication 915 determines how much of your benefits are federally taxable.
What are the income thresholds?
Single/HoH/QW: $25,000 (below = 0%) and $34,000 (above = up to 85%). MFJ: $32,000 and $44,000. MFS living together: 85% taxable at any income. These thresholds have not been inflation-adjusted since 1994.
Does my state tax Social Security benefits?
Most states don't tax SS. As of 2025, only Colorado, Connecticut, Minnesota, Montana, New Mexico, Rhode Island, Utah, Vermont, and West Virginia may partially tax benefits. Each has different income thresholds and exemptions.
How can I reduce taxes on my Social Security?
Key strategies: Roth conversions before claiming (Roth withdrawals don't count toward combined income), spreading taxable withdrawals across years, using HSA funds for medical expenses, and making Qualified Charitable Distributions (QCDs) from your IRA after age 70.5.