Gross income split into taxable base and deduction
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Estimates only — not financial, tax, or professional advice.
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What it calculates: Taxable Income, Tax Saved by Deduction, Deduction Applied.
Updated 6 June 2026 · Transparent assumptions
$16,100 off taxable income saves $3,542 at a 22% rate
The deduction removes $16,100 from the $75,000 of income, leaving $58,900 to be taxed. The saving is not $16,100 — it is that amount multiplied by the rate it would otherwise have been taxed at: $3,542 at 22%.
That distinction is worth repeating because headline coverage rarely makes it. An increase in the standard deduction of $1,000 is reported as a $1,000 benefit; it is worth $220 to a taxpayer in a 22% band and $100 to one in a 10% band. The benefit rises with income, which is the opposite of how most people assume a flat allowance works.
No records, no receipts, and no risk of a disallowed claim
The standard deduction requires nothing but the claim itself. No receipts, no substantiation, no risk that a deduction is challenged. For the large majority of filers in systems that offer it, this is both simpler and larger than anything they could itemise.
That balance shifted sharply when several jurisdictions raised the standard deduction while capping itemised categories. The share of filers itemising fell dramatically as a result, and many households that itemised for years now do better taking the standard amount without realising it. It is worth recomputing whenever the rules change or a mortgage is paid off.
Filing status, age and blindness all change it
The standard deduction depends on filing status — single, married filing jointly, head of household — and most systems add an extra amount for taxpayers over a certain age or who are blind. Someone who qualifies for both additions can have a materially larger deduction than the headline figure.
It is also indexed, usually annually, so a figure from a previous year will understate the current one. Enter the amount that applies to your own status and year rather than the commonly quoted single-filer number, or the saving computed here will be too low.
One marginal rate, when a deduction can span two bands
The saving is computed at a single marginal rate, which is exact when the deduction sits entirely inside one band. Where the deduction spans a band boundary — removing income from both a 22% band and a 12% band — the true saving is a blend, and this calculation overstates it slightly.
The effect is largest for taxpayers whose income sits just above a threshold, where the deduction can drop them into a lower band entirely. For a precise figure, compute tax with and without the deduction using the full band table; the difference is the true saving.
Sources & References
Figures on this page are checked against primary, authoritative sources. Links open in a new tab.
Tax rules vary by country, state, tax year, filing status, income type, deductions, and exemptions. This calculator is educational and uses the values you enter. Always verify final tax treatment with official sources or a qualified tax professional.
Published the calculator with its formula, worked example, assumptions, limitations and a bespoke guide, and added an automated formula test suite covering it.
Verified that the saving is the deduction multiplied by the marginal rate rather than the deduction itself — the error that overstates what an allowance is worth.
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