How much do 401(k) and IRA contributions reduce my taxes in 2026 or 2027 planning?
Use this retirement contribution tax savings calculator to estimate how traditional 401(k), IRA, or similar pre-tax contributions may reduce federal taxable income. It applies your filing status, bracket, age-based limits, and applicable Roth catch-up treatment to estimate current-year tax savings.
401k tax savings calculator
Quick answer
Traditional retirement contributions can reduce current taxable income, so the tax savings usually depend on your marginal tax rate. For applicable higher-wage 401(k) participants, catch-up dollars may be Roth and may not reduce current taxable income.
Also answers
- IRA tax deduction calculator
- retirement contribution tax calculator
- pre-tax contribution calculator
- traditional 401k tax savings
Good fit when
- Estimating tax savings from pre-tax contributions
- Comparing Roth versus traditional planning
- Testing contribution changes before year end
Have ready
- Filing status and taxable income
- Contribution amount and account type
- Age and prior-year employer wages for catch-up treatment
- Deduction eligibility assumptions
Result you get
Estimated federal tax savings and after-tax cost of the contribution.
How this calculation works
- Applies IRS tax brackets for the selected year and filing status.
- Separates required Roth catch-up dollars from pre-tax savings for applicable higher-wage 401(k) participants.
- Estimates tax with and without the contribution to calculate savings.
- Shows an approximate take-home pay impact from the contribution.
Common mistakes and caveats
- Employer matches and state taxes are not included.
- Contribution limits and deduction rules can restrict savings.
- Results depend on accurate taxable income inputs.
FAQ
Do Roth contributions reduce current taxes?
No. Roth contributions are made after tax and generally do not reduce current taxable income.
Last updated & sources
Last updated June 4, 2026.
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