Every repair-or-replace debate comes down to two percentages. The 50/50 rule gives you a concrete formula instead of a gut feeling. Two calculations, one clear answer.
Two Percentages, One Answer
Percentage one: divide your appliance's current age by its expected lifespan. A 10-year-old refrigerator with a 15-year lifespan: 67%. Percentage two: divide the repair cost by the cost of a new equivalent model. A $400 repair on a $1,200 fridge: 33%. If BOTH percentages exceed 50%, replace it. If either falls below, repair it. The rule works because it accounts for both remaining useful life and financial proportionality.
Step-by-Step Calculation
Step 1: Find your appliance's expected lifespan (refrigerator 13-17 years, washer 10-14, dryer 10-13, dishwasher 9-12, oven 13-20). Step 2: Divide current age by lifespan. Step 3: Get a repair quote from a licensed technician. Step 4: Price a comparable new model. Step 5: Divide repair cost by new model price. Step 6: If both numbers exceed 50%, replace. If not, repair.
Three Real Calculations From Port St. Lucie
Example 1: 9-year-old GE dishwasher (lifespan 10-12 years). Motor pump failed. Repair: $275. New GE dishwasher: $650. Lifespan used: 75-90% (over 50%). Repair cost: 42% (under 50%). Only one number over 50%. Verdict: repair. Still running 8 months later. Example 2: 6-year-old LG dryer. Bad heating element. Repair: $195. New LG dryer: $700. Lifespan used: 46% (under 50%). Repair cost: 28%. Both under 50%. Verdict: repair. Example 3: 14-year-old Whirlpool fridge. Compressor dead. Repair: $700. New Whirlpool: $1,100. Lifespan used: 93%. Repair cost: 64%. Both over 50%. Verdict: replace.
When to Ignore the Rule
Three exceptions. First: the appliance has needed 3+ repairs in 2 years. Repeated failures signal systemic decline, not isolated component failure. Replace regardless. Second: the repair involves a sealed refrigerant system on a fridge over 10 years old. Other sealed-system components tend to fail within 12-18 months. Third: a new Energy Star model would cut your electricity bill by $15-$20/month. Over 10 years, that's $1,800-$2,400 in savings that offsets the purchase price.
Frequently Asked Questions
What is the 50/50 rule for appliance repair?
If an appliance has used more than 50% of its expected lifespan AND the repair costs more than 50% of a new replacement, replace it. If either number is below 50%, repair is the smarter financial choice.
How long do most household appliances last?
In Florida: refrigerators 13-17 years, washers 10-14 years, dryers 10-13 years, dishwashers 9-12 years, ovens 13-20 years. Humidity and heat shorten lifespans by 1-2 years compared to northern states.
Should I repair a 10-year-old dishwasher?
Depends on the repair cost. A 10-year-old dishwasher has used 80-100% of its lifespan. Repairs under $150 (spray arm, latch, door seal) still make sense. Repairs over $250 (motor pump, control board) usually don't.
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