What Is the 50/50 Rule for Appliances?
Last updated: October 18, 2026 · 6 min read
Something in the laundry room or kitchen has quit, a repair tech has handed you a number, and now you are stuck doing mental math: is this machine worth saving, or is that money better spent on a new one? There is a tidy rule of thumb built for exactly that moment, and it takes about a minute to apply.
The short answer
The 50/50 rule (sometimes called the 50 percent rule) says to replace an appliance rather than repair it when two things are both true: it is more than 50% through its expected lifespan, and the repair would cost more than 50% of a comparable new machine. If both are true, replace. If the unit is still young or the fix is cheap, repair it and carry on.
How the 50/50 Rule Works
The rule is really two simple tests, and you only replace when the answer to both is yes. The first is a lifespan test: is the appliance more than halfway through the years it is expected to last? A five-year-old washer passes with plenty of life left; a twelve-year-old one does not. The second is a cost test: does the repair quote come to more than half the price of buying a comparable new unit? A $90 fix on a $600 machine is easy to justify; a $350 fix is a different conversation.
When an appliance is both old and facing an expensive repair, the rule tells you to stop investing in it, because the next failure is probably not far behind. When it is young or the repair is minor, you fix it. The gray zone, an older machine with a cheap-ish repair, is exactly where the extra factors below earn their keep. If you want typical numbers to test against, our guide on how long washers and dryers last lays them out.
The Simpler "50% Rule"
You will also hear a stripped-down version called simply the 50 percent rule: if any single repair would cost more than half the price of a comparable new appliance, replace it. That is it, no age test. It is quick and works fine as a gut check, but it can steer you wrong on a nearly new machine, where a costly one-off repair may still be the cheaper path over the years ahead. The full 50/50 rule keeps the lifespan test precisely to catch that case.
A Quick Lifespan Cheat Sheet
The lifespan half of the rule only works if you know roughly how long each machine is built to last. These are ballpark figures, not guarantees, and hard water or heavy use pulls them down:
| Appliance | Typical lifespan |
|---|---|
| Washing machine | about 10-13 years |
| Clothes dryer | about 10-13 years |
| Refrigerator | around 13 years |
| Dishwasher | about 9-12 years |
| Electric range | about 13-15 years |
Where Your Electricity Rate Tips the Scale
The 50/50 rule is about the repair bill, but it quietly leaves out a cost that only shows up on your monthly statement: how much the machine costs to run. An old, worn appliance is usually a hungrier one, and every cycle it draws is billed at your effective rate per kilowatt-hour. A new ENERGY STAR replacement lowers that draw, and the saving compounds over years of loads. On a borderline call, that future running cost is the thumb on the scale that pushes you from repair toward replace.
The math on a close call
Say a new ENERGY STAR unit uses roughly 300 kWh a year less than your worn-out one. At about 14¢ per kWh, a typical Texas energy rate, that is around $42 a year, or over $200 across five years, arguing quietly for replace on top of whatever the repair would cost. The higher your rate, the louder that argument gets, which is exactly why it pays to know your real rate before you decide.
When to Just Fix It
None of this means repair is the wrong answer. A young machine with a small, cheap fault should almost always be repaired; replacing it would waste years of good life. The rule is there to stop the opposite mistake: sinking $300 into a twelve-year-old machine that is likely to fail again within the year. If you are weighing a specific laundry repair, our walk-through on whether to repair or replace a washer in Texas puts real numbers against the decision.
⚡ Know your real rate before you replace
A new appliance runs on the rate you are paying per kWh, every load, for years. Compare every plan in your ZIP at your real usage in under a minute so those savings are real.
Compare Plans Free →Common Questions
What is the 50/50 rule for appliances?
The 50/50 rule is a shortcut for deciding whether to repair or replace an appliance. Replace it if it is more than 50% through its expected lifespan AND the repair would cost more than 50% of a comparable new machine. If both are true, replace; if the appliance is still young or the repair is cheap, fix it. It is a rule of thumb, not a law, but it keeps you from pouring money into a machine that is near the end anyway.
What is the 50 percent rule for appliance repair?
The plain 50 percent rule is the simpler cousin of the 50/50 rule: if any single repair would cost more than half the price of a comparable new appliance, replace it instead. It ignores age and looks only at the repair bill. The fuller 50/50 version adds the lifespan test, so a pricey repair on a nearly new machine can still be worth doing.
When should you replace an appliance instead of repairing it?
Replace when the machine is well past the halfway point of its expected life and the quote to fix it is more than about half the cost of a new one, which is the 50/50 signal. Also lean toward replacing when repairs are becoming a pattern, parts are hard to find, or the unit is old and inefficient. Fix it when it is young, the fault is small and cheap, and the rest of the machine is sound.
Does energy efficiency factor into the repair-or-replace decision?
It should, especially on a borderline call. A new ENERGY STAR machine uses less electricity every cycle, and that saving is multiplied by your per-kWh rate over years of use. On an old, inefficient unit those running-cost savings can tip a coin-flip decision toward replacing. Knowing your real rate, what you actually pay per kilowatt-hour, is what lets you put a dollar figure on that gap.