The rule: the 50% Rule.
If the repair quote is half or more of what a new dishwasher costs, replace it. Under half, repair it.
Dishwashers are relatively cheap appliances, which is why the math is so clear-cut. A $120 pump or latch on a 4-year-old dishwasher is an easy yes. But a $300 control board on a machine that costs $500 new is just bad money — you’re paying most of the price of new for a machine with no warranty and aging parts.
Dishwashers last about 9 years. Past that point, even a modest repair is a gamble — racks rust, seals dry out, and efficiency drops, so the next failure is usually close behind.
Quick answer
Repair under half the cost of new, and dishwasher under ~9 years old → repair it. Repair at half or more of new, or dishwasher 9+ years old → replace it.
Educational estimate only. Based on YOUR repair quote, cost of a comparable new dishwasher, and age of your dishwasher in years you enter. Uses 50% Rule: if repair is half or more of what a new dishwasher costs, replace it. Under half and under about 9 years old, repair it. 9+ years old, replace it. Ignores warranty, brand, install costs, efficiency.
Disclaimer: Educational only, not professional advice. Get quotes from licensed, reputable contractors.
Frequently Asked Questions
What is the 50% rule for dishwashers?
If the repair quote is half or more of what a new dishwasher costs, replace it. Under half, repair it.
When should I replace instead of repairing?
If repair is at half or more of new, or the dishwasher is 9+ years old, replace it. Dishwashers last about 9 years — past that, even a modest repair is a gamble.
When is a repair worth it?
If repair is under half the cost of new and the dishwasher is under ~9 years old, repair it — a $120 pump on a 4-year-old dishwasher is an easy yes.
When should I ignore this rule and talk to a professional?
This is educational only, not professional advice — get quotes from licensed, reputable contractors.
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