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Repair or replace? The 50 percent rule
A simple rule of thumb for water heaters, furnaces, appliances and roofs.
When something old breaks, the question is whether to fix it or put the money toward a replacement. A common rule of thumb: if the repair costs more than half the price of replacing it, and it's past half its expected life, replacement is usually the better deal.
Typical lifespans (rough guides)
- Tank water heater: about 8 to 12 years
- Gas furnace: about 15 to 20 years
- Central air conditioner: about 12 to 15 years
- Asphalt shingle roof: about 20 to 25 years
- Dishwasher, washer or dryer: about 10 to 13 years
- Refrigerator: about 10 to 15 years
Beyond the rule
- Energy use: a much more efficient replacement can lower monthly bills
- Safety: a cracked furnace heat exchanger or a leaking water heater tank means replace
- Parts: if parts are discontinued, the next repair may be impossible
- Your plans: if you're moving in a year or two, a repair often makes more sense
Try the calculator
Our Repair or replace calculator does the math for you: enter the age, the repair quote and the replacement quote.
General information, not legal, financial or construction advice. Prices and rules vary by state and city. Affordable Home Assistance doesn't take referral fees or payments from any contractor, lender or brand.