- Enter the two annual premiums. Use premiums for otherwise comparable coverage periods.
- Enter each deductible. Use the deductible that would apply to the type of loss you are modeling.
- Estimate annual claim probability. Choose a scenario rate between 0% and 100%.
- Enter a covered loss amount. The model caps deductible cost at the loss amount for the representative claim.
- Review the expected costs. Compare both options and the annual dollar difference.
- Use the break-even point. This shows the modeled claim probability at which the two expected annual costs are equal, when such a point exists between 0% and 100%.
Home Insurance Deductible Tradeoff Calculator
Compare two home insurance deductible options by combining each annual premium with the probability-weighted deductible cost of a modeled covered loss. The calculator helps evaluate the familiar tradeoff between paying more every year for a lower deductible and accepting a higher deductible in exchange for premium savings. Because homeowners can face very different claim frequencies and loss sizes, the model lets you supply both assumptions directly. The result identifies the option with the lower expected annual cost and calculates a break-even claim probability when the entered values produce one within the feasible 0%–100% range.
Enter your assumptions
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Result
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Estimated annual cost of the cheaper option
Lower-deductible expected cost—
Higher-deductible expected cost—
Estimated annual difference—
Break-even claim probability—
Expected annual cost = Annual premium + p × min(Deductible, Covered loss amount)Break-even p = Premium difference ÷ Out-of-pocket difference
Where:
- p = assumed annual probability of the modeled covered loss
- Deductible = amount paid by the policyholder before applicable insurance payment
- Covered loss amount = representative insured loss used in the scenario
- Out-of-pocket difference = difference between the two capped deductible amounts
Assumptions: The calculator models one representative covered claim and does not include claim surcharges, separate deductibles for specific perils, coinsurance, policy limits, uncovered damage, or premium changes after a claim.
What the result means
The cheaper expected-cost option has the lower premium-plus-probability-weighted deductible cost under the assumptions entered.
Home insurance deductibles may differ by peril or be stated as a percentage. Convert any percentage deductible to a dollar amount appropriate to the scenario before entering it.
Given: Option A has a $2,600 annual premium and $1,000 deductible. Option B has a $2,200 premium and $2,500 deductible. The modeled annual claim probability is 7%, with a $15,000 covered loss.
Calculation: Option A expected cost = $2,600 + 0.07 × $1,000 = $2,670. Option B expected cost = $2,200 + 0.07 × $2,500 = $2,375. Difference = $295. Break-even probability = ($2,600 − $2,200) ÷ ($2,500 − $1,000) = 26.67%.
Result: The higher-deductible option has the lower modeled annual cost by $295.
Interpretation: With a 7% claim assumption, the $400 premium savings outweigh the additional expected deductible exposure. The lower deductible becomes cheaper in this model above roughly 26.7% annual claim probability.
Which deductible should I enter if my policy has several?
Use the deductible that applies to the peril or claim scenario you are comparing. Wind, hurricane, earthquake, or other deductibles may differ from the standard deductible.
Why does claim size matter if the deductible is fixed?
For a modeled loss smaller than the deductible, the model limits out-of-pocket claim cost to the loss amount rather than assuming the full deductible is paid.
Does the calculation include premium increases after a claim?
No. Future pricing changes are uncertain and insurer-specific, so the model uses the annual premiums you enter.
What if the higher-deductible policy also has different coverage limits?
Then the expected-cost comparison is incomplete. Review limits, exclusions, endorsements, and settlement terms before comparing the policies primarily on premium and deductible.
How should I interpret a very high break-even probability?
It means the lower premium has a strong cost advantage in this simplified model unless claims are assumed to be frequent enough for the lower deductible to offset that premium difference.