Insurance Deductible Calculator

Raising a deductible is the fastest way to cut a premium, and the easiest way to create a bill you cannot pay. The decision comes down to two numbers: how much the higher deductible saves each year, and how much extra you would owe if you claimed.

This calculator compares two quotes side by side and reports the break-even point - the number of claim-free years needed before the saving covers the extra exposure.

Result

Claim-free years to break even

2.6 years

Annual premium saving

$195

Extra amount at risk per claim: $500
Total saving over the horizon: $975
Net position with no claims: $975
Net position after one claim: $475
Net position after two claims: -$25
Saving as share of premium: 13.45%

This is an estimate based on the values you entered. Actual premiums, coverage, eligibility and pricing vary by provider and by individual circumstances.

The higher deductible pays for itself in 2.6 claim-free years. Choosing it only makes sense if you can pay the extra 500 out of pocket on short notice.

How to use the insurance deductible calculator

Enter the annual premium quoted for the lower deductible, and the deductible amount.
Enter the annual premium quoted for the higher deductible, and that deductible amount.
Set the horizon in years over which you want to evaluate the choice.
Read the break-even years, then check the scenarios showing what happens with zero, one or two claims.

What people use this for

Choosing between deductible options presented on the same quote.
Deciding whether a deductible increase is worth it given how much cash you keep on hand.
Explaining the trade-off to a partner or family member with concrete numbers.
Reviewing an existing policy at renewal rather than accepting last year’s choice by default.

Worked examples

Every figure below is produced by running this calculator against the example inputs, so the numbers always match the tool.

$500 to $1,000 deductible

$1,450 a year at a $500 deductible versus $1,255 at $1,000, evaluated over five years.

Claim-free years to break even: 2.6 years
Annual premium saving: $195
Net position after one claim: $475

Jumping to a $2,500 deductible

The same $500 baseline against $1,050 a year at a $2,500 deductible over the same five years.

Claim-free years to break even: 5 years
Annual premium saving: $400
Net position after one claim: $0

What the break-even really tells you

The break-even year is when accumulated premium savings equal the extra amount you would pay on a single claim. Before that point, one claim leaves you worse off. After it, you are ahead even if a claim arrives.

A break-even under about three years is usually a comfortable trade for anyone who claims rarely. A break-even beyond five or six years means the carrier is not paying you much for the risk you are absorbing.

The question the maths cannot answer

Expected value says take the higher deductible whenever the break-even is short. Liquidity says something different: can you write a cheque for the deductible tomorrow, without borrowing, in the same week your car was written off or your roof failed?

If the answer is no, the lower deductible is the right choice regardless of what the break-even calculation says. Insurance exists to convert an unpredictable large loss into a predictable small one - a deductible you cannot fund defeats that.

Methodology and assumptions

What this calculator does, and what it deliberately does not do.

Annual saving = lower-deductible premium − higher-deductible premium. Extra risk = higher deductible − lower deductible.
Break-even years = extra risk ÷ annual saving. Claim scenarios subtract the extra risk once or twice from the accumulated saving over the horizon.
Claim frequency is not predicted. The scenarios show outcomes, not probabilities.
All figures are estimates produced from the values you enter. This site has no rate feed and no carrier data, so it cannot quote or price a policy.
Nothing you type is transmitted or stored - the calculation runs entirely inside your browser.

This calculator provides an estimate based on the information you enter. Actual insurance premiums, coverage, eligibility and pricing vary by provider and individual circumstances.

This website is not an insurance company, an insurance agency or a licensed broker. It does not sell insurance, does not provide insurance quotes, and is not authorised to give advice about which policy you should buy.

No result produced here is an offer of insurance or a guarantee of coverage. Only a licensed insurer or agent, working from your verified details, can quote or bind a policy.

Frequently asked questions

What is an insurance deductible?

It is the amount you pay yourself on a covered claim before the insurer pays anything. A $1,000 deductible on a $6,000 claim means you pay $1,000 and the insurer considers the remaining $5,000.

Does a higher deductible always save money?

It always lowers the premium, but not always by enough to be worth it. If moving from $500 to $2,500 saves only $60 a year, you are absorbing $2,000 of risk for very little.

Do all deductibles work the same way?

No. Some apply per claim, some per policy year, and some - particularly for wind, hail and earthquake - are a percentage of the insured value rather than a flat amount. Check which type your policy uses.

Should I keep the deductible amount in savings?

It is the most practical rule available. If the deductible sits in an accessible account, raising it is a reasonable trade. If it does not, raising it converts an insurance problem into a debt problem.

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