2025 Tax Brackets Married Filing Separately. 2025 tax bracket for married filing separately. For 2025, inflation adjustments increased the size of tax brackets by about 2.8%.

Irs tax brackets for tax year 2025 (will be filed in 2026). Taxpayers can file as single, married, jointly filed, married, separately filed, or head of household, each category having its income limits that define which tax rate applies.