2026 Standard Deduction Calculator (Filed in 2027) vs 2026 Tax Bracket Calculator (Filed in 2027)

For tax year 2026 — the return most taxpayers file in 2027 — the standard deduction is $16,100 for single filers, $32,200 for married filing jointly, $16,100 for married filing separately, and $24,150 for head of household, according to IRS Revenue Procedure 2025-32. This is the amount subtracted from your gross income before your tax bracket is applied, and it's available to every filer regardless of actual expenses, unlike itemized deductions which require documentation. Filers who are 65 or older, or legally blind, qualify for an additional standard deduction on top of these base amounts — an extra $2,050 for single or head of household filers, and $1,600 per qualifying spouse for married filers. The IRS has not yet published tax-year-2027 figures; those are expected around October 2026 and will apply to the following year's return.

The standard deduction is the same for single filers and married filing separately — $16,100 each for tax year 2026, per IRS Revenue Procedure 2025-32 — because each spouse in a separate-filing marriage submits their own individual return and reports only their own income, exactly as a single filer does. If the married-filing-separately deduction were set higher, or if it attempted to split the joint $32,200 figure in half, the numbers would already match, since $32,200 divided by two is $16,100 anyway. Setting it equal to the single-filer amount keeps the system consistent: two spouses filing separately together claim the same total deduction, $32,200 combined, as one couple filing jointly, so there's no tax advantage or penalty purely from the deduction amount when choosing to file separately — the difference in total tax owed comes from bracket width and credit eligibility instead.

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.

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.