Appliance Warranty Value Calculator
Determine whether an appliance warranty is worth purchasing by comparing the expected value of coverage against the warranty premium cost.
Formulas Used
Expected Annual Benefit
E(Benefit/year) = p × max(RepairCost − Deductible, 0)
where p = annual probability of a breakdown.
Present Value of Expected Benefits
PV = E(Benefit/year) × [(1 − (1+r)^−n) / r]
where r = annual discount rate, n = warranty years.
(When r = 0: PV = E(Benefit/year) × n)
Net Warranty Value (NPV)
NWV = PV of Expected Benefits − Warranty Premium
A positive NWV means the warranty is financially advantageous.
Probability of At Least One Breakdown
P(≥1) = 1 − (1 − p)^n
Breakeven Average Repair Cost
Breakeven Repair = (Premium / (p × PV Factor)) + Deductible
The repair cost at which the warranty exactly pays for itself.
Assumptions & References
- At most one repair claim per year is assumed for simplicity; multiple failures in a year would increase expected benefits.
- The annual breakdown probability is assumed constant across all years of coverage (no age-related degradation curve).
- The warranty covers the full repair cost minus any per-claim deductible; labor and parts are included.
- The discount rate reflects the opportunity cost of the premium paid upfront (e.g., investment return foregone).
- Industry data (Consumer Reports, NBER) suggests typical major appliance annual failure rates of 8–20% depending on appliance type and age.
- Average appliance repair costs range from $150–$500 (AHAM, HomeAdvisor 2023 data).
- Warranty premiums typically represent 10–25% of appliance purchase price over a 3–5 year term.
- This calculator does not account for inflation of repair costs, manufacturer defect coverage already included in standard warranties, or non-monetary benefits (peace of mind).