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Arrears Tax Relief Calculator

Work out arrears tax relief instantly with clear inputs, formula shown and shareable results.

About Arrears Tax Relief Calculator

Receiving several years of arrears in one year can push income into a higher band. Relief recomputes the tax as if the arrears had been received in the years they related to, and refunds the difference.

Formula

Arrears relief

Relief = tax at this year's marginal rate - tax at the rates of the years the arrears relate to

Worked example

With the default values below, Arrears Tax Relief Calculator returns Relief Available of $60,000.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Arrears Receivedminimum 0
600,000
Marginal Rate This Yearaccepts 0–60 %
30 %
Marginal Rate In The Earlier Yearsaccepts 0–60 %
20 %

Results

Relief Available
$60,000.00
Tax If Taxed Entirely This Year
$180,000.00
Tax After Relief
$120,000.00
Share Of Tax Relieved
33.333%

Step by step

  1. 1Values used
  2. 2Arrears relief
  3. 3Relief Available= 60,000.00
  4. 4Tax If Taxed Entirely This Year= 180,000.00
  5. 5Tax After Relief= 120,000.00
  6. 6Share Of Tax Relieved= 33.333

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Tax figures are estimates based on the rates, caps and thresholds you enter. Real rules differ by jurisdiction and change every year, and personal circumstances alter the outcome. This is not tax or financial advice — confirm with a qualified adviser.
  • This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Tax figures are estimates based on the rates, caps and thresholds you enter. Real rules differ by jurisdiction and change every year, and personal circumstances alter the outcome. This is not tax or financial advice — confirm with a qualified adviser.

Frequently Asked Questions

Is a form or election required?

Usually yes — relief must be claimed with a prescribed computation showing the year-wise spread.

Does relief apply to bonuses?

Only if they relate to earlier years' service. Discretionary current-year bonuses do not qualify.

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Arrears Tax Relief Calculator – Calculate Relief Available