Estimate your 2025 federal income tax liability with full bracket-by-bracket breakdown, effective rate, marginal rate, and quarterly estimated payment amounts. Works for all four filing statuses.
Enter Your Information
All figures are for the 2025 tax year (filed in 2026)
Filing Information
Filing Status
Tax Year
Income
W-2 / Wages & Salary From employer(s)
$
Business / Self-Employment Income Net profit
$
Other Income Interest, dividends, rental, etc.
$
Deductions & Adjustments
Deduction Method
Itemized Total
$
Other Adjustments / Above-Line Deductions IRA, student loan interest, etc.
$
Credits
Total Tax Credits CTC, education, child care, etc.
$
Detailed Income Breakdown
W-2 Wages
$
Interest Income (taxable)
$
Qualified Dividends
$
Ordinary Dividends
$
Capital Gains (LT)
$
Rental / Passive Income
$
Itemized Deductions
Mortgage Interest
$
State & Local Taxes (SALT — max $10k)
$
Charitable Contributions
$
Self-Employment Income
Gross Business Revenue
$
Business Expenses
$
Home Office Deduction
$
Vehicle Deduction (mileage or actual)
$
Other W-2 Income (if any)
$
Filing Status
Estimated 2025 Federal Tax
$0
Based on your inputs above
Gross Income
—
Taxable Income
—
Effective Rate
—
of gross income
Marginal Rate
—
top bracket
SE Tax (if any)
—
After Credits
—
Bracket Breakdown
RateIncome RangeYour IncomeTax in Bracket
📆 Quarterly Estimated Payments (Safe Harbor)
Q1 2026Due Apr 15, 2026$0
Q2 2026Due Jun 16, 2026$0
Q3 2026Due Sep 15, 2026$0
Q4 2026Due Jan 15, 2027$0
How Federal Income Tax Is Calculated
Progressive Tax Brackets
The US uses a progressive tax system, meaning only the income within each bracket is taxed at that bracket's rate. If you're in the 22% bracket, you don't pay 22% on all your income — only on the portion that falls within that range. The lower portions are taxed at 10% and 12% respectively.
Marginal vs. Effective Rate
Your marginal rate is the rate applied to your last dollar of taxable income (your "top bracket"). Your effective rate is your total tax divided by your gross income — this is what you actually pay as a percentage of earnings, and is always lower than your marginal rate.
Standard vs. Itemized Deductions
The standard deduction for 2025 is $15,000 (Single), $30,000 (MFJ), $22,500 (HOH). You should itemize only if your allowable deductions — mortgage interest, SALT (capped at $10k), charitable contributions — exceed the standard deduction.
Self-Employment Tax
Self-employed individuals pay 15.3% SE tax (12.4% Social Security + 2.9% Medicare) on net self-employment income up to the SS wage base ($176,100 for 2025). Half of the SE tax is deductible as an above-the-line adjustment.
📊 2025 Tax Reference
Standard Ded. (Single)$15,000
Standard Ded. (MFJ)$30,000
Standard Ded. (HOH)$22,500
Top Bracket Rate37%
SS Wage Base (2025)$176,100
Medicare Add'l (>$200k)+0.9%
SALT Deduction Cap$10,000
AMT Exemption (Single)$88,100
💡 Tax-Saving Tips
🏦
Max your 401(k): Contributing $23,500 (2025 limit) reduces taxable income dollar-for-dollar.
📈
HSA contributions: Up to $4,300 (self) or $8,550 (family) — triple tax advantage.
💼
Self-employed? Consider an S-Corp election to reduce SE tax on net profit above ~$50k.
🎁
Bunch charitable gifts in alternating years to exceed the standard deduction threshold.
📉
Harvest capital losses before Dec 31 to offset capital gains and up to $3,000 of ordinary income.