Single Filers — 2027 Tax Brackets (Projected)
| Taxable Income | Tax Rate | 2026 Upper Limit |
|---|---|---|
| $1 – $12,750 | 10% | $12,400 |
| $12,751 – $51,900 | 12% | $50,400 |
| $51,901 – $108,850 | 22% | $105,700 |
| $108,851 – $207,850 | 24% | $201,775 |
| $207,851 – $263,900 | 32% | $256,225 |
| $263,901 – $659,800 | 35% | $640,600 |
| $659,801+ | 37% | — |
Married Filing Jointly — 2027 Tax Brackets (Projected)
| Taxable Income | Tax Rate | 2026 Upper Limit |
|---|---|---|
| $1 – $25,550 | 10% | $24,800 |
| $25,551 – $103,800 | 12% | $100,800 |
| $103,801 – $217,750 | 22% | $211,400 |
| $217,751 – $415,650 | 24% | $403,550 |
| $415,651 – $527,800 | 32% | $512,450 |
| $527,801 – $791,750 | 35% | $768,700 |
| $791,751+ | 37% | — |
Head of Household — 2027 Tax Brackets (Projected)
| Taxable Income | Tax Rate | 2026 Upper Limit |
|---|---|---|
| $1 – $18,250 | 10% | $17,700 |
| $18,251 – $69,450 | 12% | $67,450 |
| $69,451 – $108,850 | 22% | $105,700 |
| $108,851 – $207,800 | 24% | $201,750 |
| $207,801 – $263,900 | 32% | $256,200 |
| $263,901 – $659,800 | 35% | $640,600 |
| $659,801+ | 37% | — |
2027 Standard Deduction (Projected)
| Filing Status | 2027 Projected | 2026 Confirmed |
|---|---|---|
| Single | ~$16,600 | $16,100 |
| Married Filing Jointly | ~$33,150 | $32,200 |
| Married Filing Separately | ~$16,600 | $16,100 |
| Head of Household | ~$24,850 | $24,150 |
Key 2027 Numbers (Projected)
| Item | 2027 Projected | 2026 Confirmed |
|---|---|---|
| Social Security Wage Base | ~$190,000 | $184,500 |
| 401(k) Employee Limit (Under 50) | ~$25,000 | $24,500 |
| 401(k) Employee Limit (50+) | ~$33,000 | $32,500 |
| Roth IRA Contribution Limit (Under 50) | $7,500 (likely unchanged) | $7,500 |
| Roth IRA Contribution Limit (50+) | $8,600 (likely unchanged) | $8,600 |
Calculate your exact tax liability with our free Income Tax Calculator
Open Tax Calculator →How the Inflation Adjustment Works
Each year, the IRS adjusts tax bracket thresholds, standard deductions, and contribution limits for inflation using the Chained Consumer Price Index (C-CPI-U). The adjustments prevent "bracket creep" — the phenomenon where wage increases push taxpayers into higher brackets even though their real purchasing power has not changed.
For 2027, we have applied an estimated 3% adjustment to confirmed 2026 limits and rounded to the nearest $50 or $100 as the IRS typically does. Actual 2027 adjustments will depend on the C-CPI-U data from July–September 2026, which is used to calculate the official adjustment factor.
Worked example — how marginal brackets actually apply: Brackets are marginal, not flat — only the income that falls inside a given bracket is taxed at that bracket's rate. A single filer with $80,000 of projected 2027 taxable income does not pay 22% on the full $80,000. Instead: the first $12,750 is taxed at 10% ($1,275), the next $39,150 (up to $51,900) at 12% ($4,698), and the remaining $28,100 (from $51,901 to $80,000) at 22% ($6,182) — a total of roughly $12,155, or an effective rate of about 15.2%, well below the 22% marginal bracket the last dollar fell into.
See Also: Confirmed 2026 Limits
For confirmed IRS-published figures, see our 2026 Federal Tax Brackets page.
Source: IRS Rev. Proc. 2025-32 Tables 1–4 (rate schedules) and § 4.14 (standard deduction); retirement limits from IRS Notice 2025-67; wage base from the SSA 2026 COLA fact sheet. These 2027 figures are projections computed from those confirmed 2026 amounts; the IRS, SSA and CMS publish official 2027 numbers in October–November 2026.
Frequently Asked Questions
When will official 2027 tax brackets be announced?
The IRS typically announces inflation-adjusted tax figures for the upcoming year in October or November. For 2027 tax year brackets, expect the official announcement in October or November 2026. These will be published in an IRS Revenue Procedure document.
How were these 2027 projections calculated?
These projections apply an estimated 3% inflation adjustment to confirmed 2026 IRS limits, then round to the nearest $50 (for bracket thresholds) or $100 (for larger numbers). This mirrors the methodology the IRS uses, though the actual adjustment will depend on C-CPI-U data from mid-2026.
Will the 7-bracket structure change in 2027?
Barring new legislation, the seven-bracket structure (10%, 12%, 22%, 24%, 32%, 35%, 37%) will remain in place for 2027. The TCJA brackets are permanent provisions — only the thresholds adjust for inflation each year.
How this page is reviewed
See methodology, assumptions & sources
| Risk tier | High YMYL |
|---|---|
| Author | Calculover Editorial Team Finance and legal education |
| Editorial owner | Calculover Tax & Payroll Desk Tax and wage methodology owner |
| Reviewer | Calculover Editorial Review High-risk source and limitation review |
| Last reviewed | 2026-07-31 |
| Last verified | 2026-07-31 |
| Data effective date | 2026-01-01 |
Methodology
2027 Federal Income Tax Brackets & Rates (Projected) applies the tax-rate, threshold, and taxable-base logic documented in the calculator formula section, then separates user-entered assumptions from statutory or source-linked rate inputs.
Assumptions
- 2027 Federal Income Tax Brackets & Rates (Projected) relies on the values the user enters and does not independently verify income, balances, legal status, policy terms, or market quotes.
- Taxable income, deductions, credits, filing status, jurisdiction, and timing are simplified to the fields available in the calculator.
- Federal, state, local, and international tax rules can change after the listed last-verified date.
Limitations
- 2027 Federal Income Tax Brackets & Rates (Projected) does not prepare a tax return, determine final liability, apply every credit or deduction, or account for all state, local, foreign, penalty, or surtax rules.
- Confirm current forms, thresholds, and filing obligations with the IRS, the relevant tax authority, or a qualified tax professional before filing or paying tax.
Sources
- Federal Income Tax Rates and Brackets, Internal Revenue Service
- Estimated Taxes, Internal Revenue Service
Professional guidance: 2027 Federal Income Tax Brackets & Rates (Projected) is for tax education and planning only and is not tax, legal, accounting, or filing advice. Verify current rules with the relevant tax authority or a qualified tax professional.