What are the 2027 tax brackets for married filing jointly?+
For married couples filing jointly, the tax-year-2026 brackets — the confirmed figures that apply to the return filed in 2027 — are 10% up to $24,800, 12% up to $100,800, 22% up to $211,400, 24% up to $403,550, 32% up to $512,450, 35% up to $768,700, and 37% above that, according to IRS Revenue Procedure 2025-32. The IRS has not yet published official tax-year-2027 brackets; those are expected around October 2026 and will apply to income earned in 2027, filed in 2028. Until that release, the 2026 figures above are the correct, IRS-confirmed numbers for planning the return most married couples are filing in the current season. Each threshold typically rises by a modest inflation adjustment each year, so treat these as a close approximation, not a final figure, once the 2027 schedule is officially confirmed.
How much wider are married filing jointly brackets than single brackets?+
Married filing jointly brackets are almost exactly double the single-filer thresholds through the 32% bracket, then narrow relative to double above that point. For tax year 2026 (IRS Revenue Procedure 2025-32), the 22% bracket starts at $50,400 for single filers and $100,800 for married filing jointly — precisely double — but the 35% bracket runs from $512,450 to $768,700 for joint filers versus $256,225 to $640,600 for single filers, which is no longer a clean doubling. That narrowing at the top is the structural source of the so-called marriage penalty: two high-earning single people who marry can end up with more of their combined income taxed at 35% than they would have if each had filed separately as singles. Below the 32% bracket, marrying generally has a neutral or favorable effect on your combined bracket exposure.
What are the 2027 federal tax brackets?+
The IRS has not yet published official tax-year-2027 brackets — those figures are expected around October 2026. This calculator uses the latest IRS-confirmed schedule instead: the tax-year-2026 brackets from Revenue Procedure 2025-32, which govern the return most filers submit in early 2027. Those seven rates are 10%, 12%, 22%, 24%, 32%, 35%, and 37%, and for a single filer the 22% bracket begins at $50,400 of taxable income. Brackets shift upward by roughly 2-3% each year for inflation, so when the IRS releases the 2027 figures, expect each threshold to land slightly above its 2026 counterpart rather than change dramatically. Until that publication, treating the 2026 brackets as your working numbers for the return you file in 2027 is accurate — they are the same return, just described by the calendar year the income was earned in versus the year the paperwork is filed.
What is the difference between marginal and effective tax rate?+
Your marginal tax rate is the rate charged on your last dollar of taxable income — effectively your highest bracket — while your effective tax rate is the average rate you pay across all your income once every lower bracket is factored in. Under the progressive system the IRS uses (10% through 37% for tax year 2026, per Revenue Procedure 2025-32), only the income inside each bracket is taxed at that bracket's rate, so your effective rate is always lower than your marginal rate. For example, a single filer with $90,000 of taxable income sits in the 22% marginal bracket, but because the first $11,925 is taxed at 10%, the next portion at 12%, and so on, their actual effective rate lands closer to 15-16% of total taxable income. Use your marginal rate to judge the tax cost of one more dollar earned; use your effective rate to judge your overall burden.
