No Claim Bonus Calculator

Work out no claim bonus instantly with clear inputs, formula shown and shareable results.

About No Claim Bonus Calculator

No-claims discount builds roughly 8 percentage points a year to a cap near 60%. A claim typically steps the entitlement back two years, so the real cost of a small claim is several years of higher premiums — often more than the claim was worth.

Formula

No-claims discount

discount from the years scale; a claim steps entitlement back about two years unless protected

Worked example

With the default values below, No Claim Bonus Calculator returns Premium payable of $571.20. Change any input above and every figure here is recalculated in your browser.

Inputs used

Premium before discount: 840
Claim-free years: 6 years
Claims mademinimum 0 claims: 1 claims
Protected no-claims bonusone of Not protected, Protected: Not protected

Results

Premium payable: $571.20
Discount applied: 32.0% %
Effective years after claims: 4 years
Extra premium caused by claims: $134.40

Step by step

1Values used
2No-claims discount
3Premium payable= 571.20
4Discount applied= 32.0 %
5Effective years after claims= 4 years
6Extra premium caused by claims= 134.40

Assumptions and limits

The result is derived only from the 4 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 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

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

Frequently Asked Questions

Is protecting the bonus worth it?

It costs 5-10% of premium and preserves the discount after a claim. Worth it once the discount is large and the premium high.

Does a protected bonus mean the premium will not rise?

No. Protection preserves the discount percentage, but the underlying base premium can still be increased after a claim.