Decision framework

The 50% rule for appliance repair, explained — and where it breaks

Nov 16, 2026 · 8 min read

"If the repair costs more than half the price of a new one, replace it." You've heard it from neighbors, forums and half the home-improvement internet. It's the standard opening move in appliance decisions — and it earns that status because it's a genuinely good first filter. This article covers where the rule comes from, how to apply it correctly, and the five situations where following it blindly costs you money. It's also the framework behind our repair-or-replace calculator, which pairs it with a per-year check.

Key takeaways

The rule: repair quote over 50% of the out-the-door price of a comparable new unit → lean replace; under → lean repair.
Provenance: a widely cited consumer heuristic, commonly attributed to Consumer Reports' product-repair guidance; CR's own tool is member-gated, so treat the attribution as folklore-adjacent — the published consensus (Angi, Oct 2026; repair-industry sources) is what we verify against.
Its blind spot is age: the rule says nothing about whether the machine has 6 years or 6 months of expected life left — pair it with the sourced lifespan table.
It's a rule of thumb, not gospel: energy costs, repeat failures, parts availability and your time can all overturn it.

Where the rule comes from

The 50% rule is usually described as Consumer Reports guidance: don't spend more than half a new product's price repairing an old one. We tried to verify that attribution directly — Consumer Reports' current repair-or-replace tool (consumerreports.org/repair-replace) sits behind a membership wall, so an exact verbatim quote isn't honestly fetchable, and we won't invent one. What is verifiable: the rule is repeated as standard guidance across credible consumer and industry sources. Angi's repair-cost guides (updated Oct 2026) state that when a unit is under roughly eight years old "and the repair cost is under 50% of the price of a new unit, repair is often the better choice." Mr. Appliance's guidance pairs the cost test with an age test — past half the expected lifespan, replacement becomes the smarter choice. The rule behaves like what it is: a consumer-advocacy heuristic that calcified into industry convention.

Applying it correctly

Three refinements make the rule work. First, use the out-the-door replacement price: a like-for-like unit plus tax, delivery, installation and haul-away — not the sticker on the showroom floor model. Second, include the diagnostic fee: if you paid $75 to learn the repair is $280, the decision number is $355. Third, run the age test in the same breath: a 40%-of-new repair on a machine that's used up 90% of its expected life is a very different proposition than the same repair at 40% of life. That pairing — cost over half, and past half its years, then replace — is how published sources actually state the guidance.

Where it breaks: five known limits

1. It ignores remaining life. This is the big one. The per-year view (repair cost ÷ years left vs. new price ÷ full lifespan) can contradict the 50% verdict — our calculator surfaces both and flags disagreements as judgment calls rather than pretending one number settles it. 2. It ignores energy. An aging refrigerator can quietly cost ~$95/year more to run than a new certified model (ENERGY STAR) — a "cheap" repair that keeps a power-hungry unit alive isn't always cheap. Method: energy payback thinking. 3. It ignores the cascade. Appliances near end-of-life often fail in sequence; the 50% rule evaluates each repair in isolation, so you can "pass" it four times in two years. A second major repair in a year is the practical override. 4. It ignores parts reality. If the control board is discontinued or back-ordered for six weeks, "repair" isn't really on the menu at any price. 5. It ignores you. Shopping days, delivery windows, installation logistics and the annoyance of a dead machine during a holiday week are real costs the rule will never see.

When to overrule the rule outright

Safety recalls or repeated smoke/gas symptoms: the decision leaves economics entirely.
Any fault touching gas lines, burners or venting: that's licensed-technician work regardless of price — see the safety lines.
Free or warranty-covered repairs: a $0 fix beats the rule before it starts; enter 0 in the calculator and it says exactly that.
A move or remodel within the year: repairing a machine you won't take with you changes the horizon the rule assumes.

Used honestly, the 50% rule is the fastest sanity check in home economics: fifteen seconds, one division, usually the right lean. Just remember what it is — a screening heuristic with a known blind spot for age, backed by decades of consumer-guidance consensus rather than a law of physics.

Sources

Angi, dishwasher repair guide (updated Oct 2026, fetched 2026-11-16) — the under-8-years / under-50% formulation and new-unit pricing.
Mr. Appliance, repair-or-replace and life-expectancy guidance — mrappliance.com.
ENERGY STAR refrigerators (fetched 2026-11-16) — ~$95/yr figure for 15+ year-old fridges — energystar.gov.
Consumer Reports repair-or-replace tool (member-gated; existence verified, content not quoted) — consumerreports.org.