2027 Federal Tax Brackets & Standard Deduction Calculator (Projected)
2026 (confirmed)
2027 (projected)
2027 figures are calculated as: confirmed 2026 IRS brackets x Bloomberg Tax's projected 3.2% inflation adjustment, rounded to the nearest $50. That formula produces a $104,050 married-filing-jointly 12% bracket ceiling — matching the one bracket figure Bloomberg Tax has actually published. Standard deduction ($16,600 single / $33,200 married) uses the figure independently corroborated by three forecasters. This is general information, not tax advice.
Free 2027 federal tax bracket calculator (projected) — see next year's estimated brackets and standard deduction next to this year's confirmed numbers. Built with a transparent formula (confirmed 2026 brackets x Bloomberg Tax's 3.2% projected inflation adjustment, rounded to the nearest $50) that matches the one bracket figure Bloomberg Tax has actually published.
How it works
- Pick your filing status: Single or Married filing jointly
- Enter your taxable income
- See your 2026 confirmed tax next to your 2027 projected tax, with marginal and effective rates for both, plus the projected 2027 standard deduction
Frequently asked questions
Are these official 2027 numbers?
No. The IRS typically announces official brackets for the following year in October or November. These are projections based on Bloomberg Tax's forecast of a 3.2% inflation adjustment (using the chained CPI the IRS itself uses), applied to the confirmed 2026 brackets and rounded to the nearest $50.
Why do other 2027 tax bracket sites show different numbers than this one?
We checked three other forecasting sites directly and found their Single 10% bracket ceiling ranged from $12,700 to $12,800 to $12,750 — each using a slightly different inflation assumption or rounding rule, usually without explaining which. We use the exact formula Bloomberg Tax's own figures imply: our calculated $104,050 ceiling for the married-filing-jointly 12% bracket matches Bloomberg Tax's own published number exactly, which is the only piece of their table publicly confirmed so far.
Should I use this or the Income Tax Calculator for my actual tax return?
Use the Income Tax Calculator for your actual 2026 taxes — those brackets are IRS-confirmed. This calculator is for next year's planning only, since 2027 numbers won't be official until this fall.
What's the projected 2027 standard deduction?
$16,600 for single filers and $33,200 for married filing jointly — these exact figures are corroborated by three independent forecasters (Wolters Kluwer, Bloomberg Tax, and ustax.tools), so we used the multi-source consensus number rather than our own single calculation.
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Update history
- 2026-09-23 Launched: 2027 federal tax bracket and standard deduction calculator (projected), using a transparent 3.2%-adjustment formula validated against Bloomberg Tax's one publicly confirmed bracket figure. Cross-links to the Income Tax Calculator for this year's confirmed numbers. TODO: replace with confirmed IRS figures once announced (expected Oct-Nov 2026).