Choosing an Insurance Deductible: The Trade You Are Actually Making

Your deductible is the amount you pay out of pocket on a claim before the insurer pays anything. Your premium is what you pay to hold the policy. The two move in opposite directions, and choosing between them is one of the few insurance decisions genuinely within your control.

The relationship is straightforward

The lower your deductible, the higher your premium. Raise the deductible and the premium falls.

This makes sense from the insurer's side. A higher deductible means you absorb small losses yourself and file fewer claims, so they expect to pay out less and charge you less to reflect it.

What is less obvious is that the saving is rarely proportional. Doubling your deductible does not halve your premium. The reduction is usually meaningful but modest, which is exactly why the decision needs actual arithmetic rather than instinct.

Do the break-even calculation

Suppose raising your deductible from $500 to $1,500 saves you $220 a year.

You have taken on $1,000 more risk per claim
You save $220 per year
Break-even: $1,000 divided by $220 = about 4.5 years

So if you go longer than about four and a half years between claims, the higher deductible wins. If you claim more often than that, it loses.

For most people the honest answer is that claims are rare, which is why higher deductibles usually come out ahead over time. But "usually ahead over time" is not the whole question.

The question that actually decides it

Could you write a cheque for the deductible tomorrow, without borrowing?

If the answer is no, the higher deductible is the wrong choice regardless of what the break-even maths says. Insurance exists to stop a bad event becoming a financial catastrophe. A deductible you cannot pay defeats that purpose: you end up either not claiming, or funding the deductible on a credit card at an APR that erases years of premium savings.

This is why deductible choice and emergency savings are the same decision viewed from two angles. Raising your deductible is only a saving if the difference sits somewhere you can reach it.

A reasonable sequencing:

1. Build cash reserves to at least cover your deductibles

2. Then raise deductibles to reduce premiums

3. Keep the premium saving in the same reserve rather than absorbing it into spending

Watch for deductibles that are not flat amounts

Some policies express the deductible as a percentage of the insured value rather than a fixed sum. This is common for wind, hurricane and earthquake cover on homeowners policies in exposed regions.

On a home insured for $400,000, a 2% named-storm deductible is $8,000 - not the $1,000 flat deductible you may have in mind from the rest of the policy. These are frequently separate from, and much larger than, the standard deductible.

If you live somewhere these apply, find out what yours is before you need it.

Where a low deductible still makes sense

When cash reserves are thin, and a large out-of-pocket cost would force borrowing
On cover you expect to use, where the claim frequency is genuinely high
When the premium difference is small, meaning you are taking on real risk for very little saving

Run the break-even. If it comes out at fifteen years, the insurer is not paying you enough to take on that risk.

The general principle

Insurance is best used for losses you could not absorb, not losses you would rather not absorb. Raising deductibles moves small, survivable costs onto you - which is the efficient place for them - provided you have actually set aside the money to survive them.

Sources

Current as of August 2026. Figures are illustrative examples. Insurance is regulated at state level and terms vary - check your policy documents.