Skip to main content
Salary, Payroll & Tax

Marginal Tax Rate Illustration Calculator

See how much of a raise or bonus you keep under progressive brackets, and how marginal and effective rates change.

Your inputs

Format: upper limit:rate %, separated by commas, ending with *:rate for the top bracket. The defaults are illustrative only — replace them with the current official brackets for your jurisdiction and tax year.

Results

You keep from the extra income

$7,000.00

Extra tax on it
$3,000.00
Average rate on the extra income
30%
Marginal rate before
25%
Marginal rate after
35%
Effective rate before
19.706%
Effective rate after
20.789%

✓Exact calculation — rounded only for display

Notes for this result

  • Under progressive brackets only the income inside a higher bracket is taxed at that bracket’s rate, so a raise never lowers your after-tax income on its own (benefit phase-outs are a separate matter).

Inputs are never added to links for financial, salary or health calculators.

What this calculator does

A common worry is that a raise into a higher bracket reduces take-home pay. Under progressive brackets it does not: only the income inside the higher bracket is taxed at the higher rate.

Formula and method

Extra tax = tax(income + extra) − tax(income); You keep = extra − extra tax

Worked example

Calculated by this tool with its default inputs:

Inputs

  • Current taxable income: 85000 (any currency)
  • Additional income (raise, bonus, side work): 10000 (any currency)
  • Tax brackets (upper limit:rate %): 10000:10, 40000:15, 90000:25, *:35

Results

  • You keep from the extra income: 7,000
  • Extra tax on it: 3,000
  • Average rate on the extra income: 30%
  • Marginal rate before: 25%
  • Marginal rate after: 35%
  • Effective rate before: 19.706%

How to read the results

The average rate on the extra income is often between your old and new marginal rates.

Assumptions and limitations

  • Tax rules differ by country, region and year. Enter the official rates and brackets that apply to you; the defaults are illustrative and do not represent any jurisdiction. This is not tax advice.
  • Benefit phase-outs and means-tested programmes can create high effective marginal rates; they are not modelled.

Tax and payroll figures depend on rules that differ by country, region and year and change often. Enter official current rates, and consult the tax authority or a qualified adviser — nothing here is tax advice.

Questions

Can earning more ever leave me worse off?

Not from brackets alone. Loss of income-tested benefits or credits can, in some systems.

Methodology and verification

Result type
Exact mathematical calculation (rounded only for display)
Formula version
1.0
Automated verification
3 reference and validation test cases, checked against independently computed values. The site cannot be built if any of them fail.
Editorial review
Awaiting human editorial review. The explanation was drafted with AI assistance; the formula and examples are verified by the automated tests above.

Privacy

Everything you enter is calculated in this browser and is not sent to Numerith or anyone else. Because this calculator can involve personal financial or health details, your inputs are never added to share links or saved to history. Privacy policy