The single most important rule the 50% repair cost threshold
When a home appliance breaks down, the first question is usually whether to repair it or buy a new one. The answer depends on a few clear numbers. The most important rule is the 50% repair cost threshold.
Replace if the repair quote exceeds 50% of a new appliance's cost. For appliances under five years old, repair is often worth it even up to 60–70% of new. Check remaining value and energy savings before deciding.
- Replace if the repair quote exceeds 50% of a new appliance's price.
- Repair is usually worth it for appliances under five years old.
- For appliances over eight years old, replacement often saves more.
- Calculate remaining value: divide original price by expected lifespan.
- Modern models cut energy use by 10–30% vs older ones.
- The single most important rule the 50% repair cost threshold
- How to calculate your appliance's remaining value before deciding
- Quick numbers average lifespan, repair cost, and energy savings by appliance type
- The direct answer to "should I repair or replace my appliance?"
- Energy efficiency ratings and how they tip the balance toward replacement
- How to verify an installer or repair service (MCS, TrustMark, Gas Safe, and FENSA)
- When to repair for environmental reasons even if the cost is borderline
If the repair quote exceeds 50% of the price of a comparable new appliance, replacement is almost always the financially sensible choice. Energy Saving Trust data shows this rule applies for most standard household appliances (Energy Saving Trust, 2026).
For appliances under five years old, repair is usually worth it even if the cost is closer to 60–70% of new, because the remaining lifespan is longer. For appliances over eight years old, replacement often saves more in energy bills and future repair costs than repairing.
How to calculate your appliance’s remaining value before deciding
You can calculate the remaining value of your appliance using a simple method. Divide the original purchase price by the expected lifespan in years. For example, a £600 washing machine with a 10-year lifespan gives £60 per year of value.
Multiply that yearly value by the years the appliance has already served you. Subtract that figure from the original price to get the remaining value. Compare that remaining value against the repair cost. If the repair cost is higher, replacement is the logical step. Which? magazine provides lifespan data for common appliances (Which?, 2026).
This calculation helps you avoid spending more on repairs than the appliance is worth. It also accounts for the fact that older appliances are more likely to break down again soon after a repair.
Quick numbers average lifespan, repair cost, and energy savings by appliance type
| Appliance type | Average lifespan (years) | Typical repair cost range (£) | Typical new cost (£) | Annual energy savings from modern model (%) |
|---|---|---|---|---|
| Washing machine | 8–10 | 80–200 | 300–600 | 15–25% |
| Fridge-freezer | 10–15 | 100–250 | 400–900 | 20–30% |
| Dishwasher | 8–12 | 90–180 | 350–700 | 10–20% |
| Tumble dryer | 8–12 | 80–200 | 300–700 | 15–25% |
| Electric oven | 10–15 | 100–250 | 400–800 | 10–15% |
These figures come from Energy Saving Trust appliance efficiency data and Which? repair cost surveys (Energy Saving Trust, 2026; Which?, 2026). The energy savings shown are for upgrading from a 10-year-old model to a current A-rated model.
The direct answer to “should I repair or replace my appliance?”
Repair if the appliance is less than half its expected lifespan, the repair cost is under 50% of a new equivalent, and the part is readily available. Replace if the appliance is more than 75% through its expected lifespan, the repair cost exceeds 50% of new, or the model is over 10 years old.
Energy savings from a modern A-rated model can offset the replacement cost within 3–5 years for high-use appliances like fridges and washing machines. The Department for Energy Security and Net Zero (DESNZ) publishes analysis on this (DESNZ, 2026).
For example, a 10-year-old washing machine that uses 220 cycles per year may cost around £70 annually in electricity. A new A-rated model could cut that to roughly £40–£50. Over five years, the savings of £100–£150 help offset the purchase price. How to read energy labels on appliances
Energy efficiency ratings and how they tip the balance toward replacement
Appliances built before 2020 typically have older energy labels (A+++, A++, A+). A 2026 A-rated model uses 15–30% less energy than a 2015 A+++ model, according to GOV.UK energy label guidance (GOV.UK, 2026).
For a washing machine used 220 cycles per year, upgrading from a 2015 model to a 2026 A-rated model saves roughly £35–£55 annually on electricity. The EU/UK energy label rescaling means a 2026 “C” rated model may be as efficient as a 2015 “A+++” model. Always check the actual kWh/year figure on the label rather than relying solely on the letter grade.
DESNZ product energy efficiency standards confirm that modern appliances must meet stricter minimum requirements (DESNZ, 2026). This means replacement often pays for itself through lower running costs within a few years for frequently used appliances.
How to verify an installer or repair service (MCS, TrustMark, Gas Safe, and FENSA)
For gas appliances such as boilers, gas hobs, and gas tumble dryers, the engineer must be Gas Safe registered. Check their ID card on arrival or search the register online at GasSafeRegister.co.uk (Gas Safe Register, 2026).
For electrical repairs to washing machines, dishwashers, and ovens, look for TrustMark accreditation or membership in a competent person scheme like NICEIC or NAPIT. This ensures the work meets Part P building regulations (TrustMark, 2026).
For window or door appliances such as integrated fridge-freezer doors, FENSA certification applies to replacement glazing, not the appliance itself. If the repair involves door seals or glazing, FENSA-registered fitters are recommended (FENSA, 2026). MCS certification is not relevant for standard home appliance repair or replacement. It applies to renewable energy systems like heat pumps and solar panels (MCS, 2026). What is MCS certification and when do you need it
When to repair for environmental reasons even if the cost is borderline
The carbon footprint of manufacturing a new washing machine is roughly 200–300 kg CO₂e. Repairing extends the life and avoids that upfront carbon cost. DESNZ product carbon footprint data supports this figure (DESNZ, 2026).
If the repair cost is between 50% and 70% of new, and the appliance is less than 6 years old, repairing is often the greener choice. The UK’s “right to repair” legislation, effective from 2021, requires manufacturers to make spare parts available for 7–10 years (GOV.UK, 2026). Check part availability before deciding, as some manufacturers may not stock parts for older models.
For borderline cases where the repair cost is close to the replacement cost, consider the environmental impact. A repair that extends the appliance’s life by three or more years avoids the carbon cost of manufacturing a new unit. This makes repair the better environmental choice even when the financial case is less clear-cut.
Frequently Asked Questions
The 50% rule means if your repair quote is more than half the price of a comparable new appliance, replacement is the financially smarter choice. Energy Saving Trust endorses this rule for most standard household appliances (Energy Saving Trust, 2026).
Washing machines last 8–10 years, fridge-freezers 10–15 years, and dishwashers 8–12 years. Which? magazine provides detailed lifespan data for common appliances (Which?, 2026).
For washing machines over eight years old, replacement is often cheaper than repair. A typical repair costs £80–£200, while a new machine starts at £300, and modern models save 15–25% on energy annually.
Replacing a 15-year-old fridge-freezer with a new one can cut energy bills by 20–30% per year. Energy Saving Trust data shows newer models use much less electricity (Energy Saving Trust, 2026).
If your dishwasher is under warranty, repair is almost always the right choice as it's usually free or low-cost. Once the warranty expires, apply the 50% rule to decide.
