Estimate how pre-tax retirement contributions (401k/IRA) could affect your federal tax estimate.
Tax can feel hard to untangle, especially when income, pre-tax retirement contributions (401k/IRA), child benefit and investment gains all interact. Tax Relief helps you explore how further pre-tax retirement contributions (401k/IRA) may affect your estimated federal tax estimate for 2026/27.
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Guidance, not advice. Tax Relief estimates outcomes based on information entered. It does not replace tax advice, financial advice or pension advice. Tax rules can change. Always verify with IRS or a qualified adviser before acting.
What you will see inside
Sample data only — your actual results are based on the numbers you enter.
A pension contribution may affect more than your pension pot. Depending on your income and circumstances, it may also affect your estimated tax liability, personal allowance, Child Tax Credit phaseout and some chargeable gains from investment bonds.
When income sits in the $100,000 to $125,140 range, even a moderate pension contribution can restore personal allowance, creating an effective relief rate well above the headline tax rate. Understanding where you sit is a useful first step before speaking with an adviser.
See how the details you enter may affect an estimated income federal tax estimate for the 2026/27 tax year.
Explore how adjusted net income above $100,000 may reduce your personal allowance, and how pre-tax retirement contributions (401k/IRA) could help restore it.
If you claim Child Benefit and have income above $60,000, the tool estimates how pre-tax retirement contributions (401k/IRA) could reduce or eliminate the charge.
The tool can give an indication of how pre-tax retirement contributions (401k/IRA) may interact with certain chargeable gains, including top-slicing on investment bonds.
Add salary, self-employment, pension income, rental, dividends and savings interest.
Enter any pre-tax retirement contributions (401k/IRA) or Gift Aid already in place this year.
Enter a further gross pension contribution to see its estimated effect.
See an estimated before-and-after view of your federal tax estimate, including any Child Benefit charge and personal allowance impact.
This tool estimates your tax liability based on the information you enter. The results should not be considered tax advice, financial advice or pension advice. They are designed to help you understand possible areas to discuss with a qualified adviser or to check directly with IRS.
Results are based on current understanding of UK legislation and IRS practice as at March 2026. These can change without notice. The tool does not consider every circumstance that could affect your federal tax estimate, and does not account for National Insurance.
Always verify figures with a qualified tax adviser, financial adviser or with IRS before making any pension, tax or financial decisions.
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