2026 Tax Bracket Calculator: Marginal vs. Effective Rate

The calculator above uses the actual 2026 federal brackets from IRS Rev. Proc. 2025-32. Enter taxable income and filing status and it walks your income through each band, showing the tax generated inside each bracket, your marginal rate, and your effective rate.

Two different questions get confused on every bracket page. "What rate applies to my next dollar?" drives planning decisions: whether a Roth conversion, a bonus deferral, or an extra 401(k) dollar is worth it. "What share of my income goes to federal tax?" is your effective rate, and it is always lower because the first dollars run through the 10% and 12% bands no matter how much you earn.

One caution on inputs: the brackets apply to taxable income, which is income after the standard deduction ($16,100 single, $32,200 married filing jointly for 2026) or itemized deductions. If you enter gross salary, the calculator will overstate your tax.

These are the official 2026 tax year brackets, the return you will file in early 2027. The One Big Beautiful Bill Act made the seven TCJA rates permanent and gave the 10% and 12% bracket tops an extra inflation bump for 2026.

Here is a single filer with $250,000 of 2026 taxable income walked through every band. The top rate touched is 32%, but only $48,225 of income is taxed there.

Bracket position is not fixed by your salary. Pre-tax 401(k) and HSA contributions, self-employed retirement plans, and above-the-line deductions all reduce the income the brackets apply to. For 2026 an employee can defer $24,500 into a 401(k), which for a filer at the 32% margin is roughly $7,840 of federal tax deferred in one move.

Income character matters as much as income amount. Long-term capital gains and qualified dividends never touch this table; they use their own 0%, 15%, and 20% brackets. A household with $250,000 of total income that includes $60,000 of long-term gains pays far less than this table suggests.

Filing status is the other lever people forget. The same $250,000 of taxable income is taxed at a 32% margin for a single filer but only 24% for a married couple filing jointly, because the joint 24% band runs to $403,550.

For owners of S-corps and partnerships, the character question extends further. Pass-through profit lands on the personal return and may carry a QBI deduction of up to 20%, which for 2026 begins phasing in limits at $201,750 of taxable income for single filers and $403,500 for joint filers. That deduction effectively discounts the bracket rate on qualified business income, which is why an S-corp owner and a W-2 employee with identical taxable income can face different true marginal rates.

The published rate understates the true marginal rate whenever an extra dollar of income also phases out a benefit. The 3.8% net investment income tax starts at $200,000 of MAGI for single filers ($250,000 joint), the 0.9% additional Medicare tax starts at the same wage thresholds, and QBI deduction phase-outs can push an S-corp owner’s effective marginal rate well above the table.

This is where a calculator stops and planning starts. The bracket table tells you the base rate; your return tells you the stack. High earners routinely discover their true marginal rate is 3 to 8 points above the printed bracket once surtaxes and phase-outs are counted.

Long-term capital gains and qualified dividends use their own 0%, 15%, and 20% brackets, but the two systems are not independent. Gains stack on top of ordinary income when the return measures which capital gains rate applies: ordinary income fills the ladder first, and the gains occupy the space above it. For 2026 the 0% capital gains band runs to $49,450 of taxable income for single filers and $98,900 for joint filers, and the 15% band runs to $545,500 and $613,700 respectively.

Take a single filer with $150,000 of ordinary taxable income and $50,000 of long-term gains. The ordinary tax is computed on the $150,000 alone, about $28,598 under the 2026 single brackets. The gains then occupy the layer from $150,000 to $200,000 of taxable income. That entire layer sits above the $49,450 0% breakpoint and far below the $545,500 line where 20% begins, so all $50,000 is taxed at 15%, another $7,500. Total federal tax: roughly $36,098.

The stacking order cuts both ways. Every extra dollar of ordinary income (a bonus, a Roth conversion, side-business profit) pushes the gain layer upward and can shove gains across a breakpoint, so an income event can raise the tax on gains you realized months earlier. In the other direction, deductions that reduce ordinary income pull the gain layer down, and in low-income years can drop gains into the 0% band entirely.

High earners add one more layer: the 3.8% net investment income tax applies to gains once MAGI exceeds $200,000 single or $250,000 joint, thresholds that are fixed by statute and never indexed. The all-in top federal rate on long-term gains is 23.8%.

The seven rates are identical to 2025; only the thresholds moved. Annual inflation indexing shifted every bracket edge upward, and OBBBA added an extra one-time bump to the tops of the 10% and 12% brackets for 2026, a modest tilt in favor of the lower bands.

The headline moves: the single 37% bracket now starts at $640,600, up from $626,350 in 2025. For joint filers it starts at $768,700, up from $751,600. The standard deduction rose from $15,750 to $16,100 for single filers and from $31,500 to $32,200 for joint filers. Every band widened by roughly the same indexing factor.

Two practical consequences. First, indexing is what prevents bracket creep: a raise that merely matches inflation should not push you into a higher real tax position, and the annual threshold moves are the mechanism. Second, match the year to the return. The return you file in early 2027 uses these 2026 thresholds; the 2025 return filed in early 2026 uses the 2025 thresholds. Mixing years is the most common error in DIY projections, and it always shows up right at a bracket edge where the decision was closest.