Home Warranty Cost Calculator
Total Annual Cost
Most people compare warranties by monthly premium. That is the wrong number. Total annual cost includes your premium, expected service fees, and expected out-of-pocket above coverage caps.
The Full Cost Formula
Annual premium + (Expected claims × Service fee) + Expected HVAC overage
Annual Premium
Monthly premium × 12. Get this from your quote.
Basic
$480-$600/yr
$40-$50/mo
Mid-tier
$600-$780/yr
$50-$65/mo
Premium
$780-$1,080/yr
$65-$90/mo
Expected Claims per Year
Select your home profile to see the expected claims range, then enter a number.
| Home Profile | Expected Claims/Year | Use this |
|---|---|---|
| New home (0-5 years) | 0.3-0.5 | |
| Mid-age home (6-15 years) | 0.8-1.2 | |
| Older home (16-25 years) | 1.2-2 | |
| Aging home (25+ years) | 1.5-3 |
Service Fee Cost
Multiply expected claims by your service fee. The result is your expected annual service fee spend.
Expected HVAC Out-of-Pocket Overage
Estimate the expected value of HVAC costs above your warranty's coverage cap.
| HVAC Age | Annual Failure Probability | Use midpoint |
|---|---|---|
| Under 10 years | 3-5% | |
| 10-15 years | 8-12% | |
| 15-20 years | 15-20% | |
| Over 20 years | 25-35% |
Example: 12% × ($9,000 replacement − $3,000 cap) = $720/year in Phoenix
Expected HVAC overage/yr
$—
Total Annual Cost
Annual premium
Expected service fees
$—
Expected HVAC overage
$—
Total annual cost
$—
Compare Two Plans
Run the calculation for both quotes. The cheaper monthly premium often produces the higher total annual cost once caps and fees are factored in.
| Plan A | Plan B | |
|---|---|---|
| Annual premium | $ | $ |
| Expected service fees | $ | $ |
| Expected HVAC overage | $ | $ |
| Total annual cost | $— | $— |
What this calculator does not include
- Non-HVAC out-of-pocket exposures (plumbing, electrical, appliance overages)
- The value of repair convenience (subjective)
- Claim denial probability - which varies significantly by company
For a complete picture, also check company BBB ratings and enforcement history - claim denial rates are the hidden variable in this math.