Deductible vs. Premium Tradeoff Calculator

How the deductible vs. premium tradeoff actually works

An insurance deductible is the amount you pay out of pocket before your coverage kicks in on a claim. Raising it lowers your premium, because you are taking on more of the small-claim risk yourself and leaving the insurer exposed to fewer, larger payouts.

The tradeoff is straightforward in theory: pay less every year, or pay less if something happens. The part most people skip is figuring out which one actually saves them money given how often they realistically file claims.

For auto insurance, the deductible only applies to collision and comprehensive coverage, the parts of your policy that cover damage to your own car. Liability coverage, which pays for damage you cause to others, is unaffected by your deductible choice.

According to the Insurance Information Institute, raising a collision and comprehensive deductible from $200 to $500 can cut that portion of your premium by 15 to 30 percent, and reaching a $1,000 deductible can save 40 percent or more.

This calculator applies that discount only to the share of your premium you tell it is collision and comprehensive, not your full bill.

Homeowners insurance works a little differently: the deductible usually applies to the whole policy, not just one coverage type. Insurers do not publish a single standard percentage for how much a homeowners deductible increase saves, so this calculator uses a wider, clearly-labeled estimate range drawn from multiple consumer finance sources, scaled to how large your deductible increase is.

The number that actually matters is the break-even point: how many years you need to go between claims for the higher deductible to have been worth it. If your estimated annual savings is $150 and the deductible increase is $500, you need roughly three and a half claim-free years to come out ahead.

File a claim sooner than that, and you would have been better off with the lower deductible. This calculator shows that break-even range so you can weigh it against your own claim history, not a generic rule of thumb.

A quick worked example: say your current auto premium is $1,200 a year, and about 45 percent of that, $540, covers collision and comprehensive. Raising your deductible from $200 to $500 could save you roughly $81 to $162 a year on that portion, depending on your insurer.

Against a $300 larger deductible, that puts your break-even somewhere between about two and four claim-free years. If your driving history suggests you file a comprehensive or collision claim less often than that, the higher deductible is likely a net win over time.

If you tend to file more often, for example because of a long commute in a high-traffic area, the lower deductible may actually cost you less in the long run despite the higher premium.

One more thing worth sitting with before you raise a deductible: only raise it to an amount you could actually pay out of pocket without financial strain. A lower premium is not a win if a claim next month leaves you unable to cover your own deductible.