Refrigerators, Dishwashers, and the Real Math of Repair vs. Replace

A repair technician standing in a kitchen, quoting a price to fix a failing dishwasher, is describing a decision that most homeowners make on instinct rather than arithmetic. The instinct usually goes one of two directions: either "it's not that old, just fix it" or "it's been nothing but trouble, replace it." Both instincts are right often enough to feel reliable and wrong often enough to cost real money. There's a more useful way to make this call, and it isn't complicated — it just requires slowing down for five minutes before agreeing to anything.

Start with expected lifespan, not actual age

Every major appliance category has a rough expected lifespan based on typical usage and manufacturing standards. Refrigerators generally run ten to eighteen years depending on type and usage. Dishwashers tend toward a shorter window, often nine to twelve years. Washing machines and dryers sit somewhere in between. These are ranges, not guarantees, but they're useful anchors because they tell you where an appliance sits on its own timeline, which matters more than its age in isolation.

A four-year-old dishwasher and a fourteen-year-old dishwasher facing an identical repair are not facing an identical decision. The four-year-old unit likely has most of its useful life still ahead of it; a repair is very probably worth the money because there's a long runway left to recover that investment through continued use. The fourteen-year-old unit is likely near or past the point where the manufacturer, and the market broadly, expects it to still be running well. The same repair, on that older unit, is buying a much shorter remaining runway — sometimes just enough time to break down again in a different way within a year or two.

The 50% rule, and why it's a starting point rather than a law

A commonly cited rule of thumb says: if a repair costs more than roughly 50% of the price of a new comparable unit, lean toward replacement; if it's meaningfully less, lean toward repair. This isn't a precise formula and it shouldn't be treated as one, but it's a genuinely useful gut-check because it forces a direct comparison that most people skip. Homeowners often evaluate a repair quote in isolation — "is $380 a lot to fix a dishwasher?" — without ever pricing out what a comparable new unit costs. Once you know a decent new dishwasher runs somewhere in the $600–$900 range, that $380 repair on a six-year-old unit reads very differently than it does floating on its own.

The rule gets more useful when combined with the lifespan context from above. A repair at 40% of replacement cost on an appliance already past its expected lifespan is a worse deal than the raw percentage suggests, because you're not just buying a repair — you're buying a repair on borrowed time. The same 40% repair on a unit still comfortably within its expected lifespan is a genuinely good deal.

Count the repairs, not just this one

A single repair quote tells you about one failure. A pattern of repairs tells you about the whole appliance, and it's the pattern that should carry more weight in the decision. An appliance that has needed two or three service calls in the past eighteen months is signaling something a single repair estimate can't: that its components are aging together, and whatever gets fixed this time is likely to be followed by a different failure in a different part before long.

This is worth tracking loosely even if it's just a mental note or a note in your phone — date, appliance, what broke, roughly what it cost. When a third call comes in within two years for the same refrigerator, that history is often more decisive than any single repair-cost percentage, because it's telling you the appliance's overall reliability has shifted, not just that one part wore out.