What does a washing machine actually cost to run?
A typical wash costs somewhere between 8p and 27p, and the temperature setting is almost the whole story. A 30°C cycle uses around 0.3 to 0.5kWh, a 40°C cycle around 0.6 to 1kWh, and a 60°C cycle can use 1.2kWh or more. At today’s Ofgem price cap rate of 26.11p per kWh, that washing machine cost works out at roughly 8p to 13p for a cool wash, 16p to 26p at 40°C, and 31p or more at 60°C.
Run a family’s laundry most days and those pennies genuinely add up. Five washes a week at 40°C comes to somewhere around £50 to £70 a year on the machine alone, before you even factor in a tumble dryer. The washing machine cost is small per cycle and easy to ignore, which is exactly why it’s worth a proper look.
Temperature is what really drives the washing machine cost
Heating the water is where nearly all the electricity goes. Somewhere around 80% to 90% of a wash’s total energy use is spent warming water to temperature, not spinning the drum. Drop from 40°C to 30°C and you can cut the washing machine cost by roughly a third without changing anything else about the cycle.
Modern detergents are built for cooler washes, so the drop in temperature rarely means a worse clean for everyday laundry. The exception is genuinely soiled loads, bedding, or anything that needs a proper hygiene wash, where a higher temperature still earns its keep.
Key takeaways
- A 30°C wash costs roughly 8p to 13p, a 40°C wash 16p to 26p, and a 60°C wash 31p or more.
- Around 80% to 90% of the washing machine cost comes from heating the water, not the spin cycle.
- An eco cycle takes longer but can cut the washing machine cost by 30% to 40% compared with a standard cycle.
- Full loads are more efficient per item than two half-full washes.
- A colder cycle now runs about as clean as a warmer one did a decade ago, thanks to detergent changes.
The eco cycle: genuinely cheaper, just slower
The eco programme runs at a lower temperature for longer, which sounds like it should cost more, but the extended time is mostly gentle tumbling rather than active heating, so the washing machine cost still comes down. Manufacturers generally quote a 30% to 40% saving for eco versus a standard cycle at the same temperature.
The catch is genuinely the time. An eco cycle can run two to four hours, against roughly an hour for a standard 40°C wash, so it suits a load you can leave running overnight rather than one you need back in twenty minutes.
Three easy ways to cut the washing machine cost
First, wash at 30°C as your default, and save 40°C or above for the loads that genuinely need it. This single change does more for the washing machine cost than almost anything else on this list.
Second, wait for a full load rather than running the machine half empty twice. A full 30°C wash almost always beats two half-full washes on cost per item, even though the total cycle uses a bit more energy.
Third, skip the pre-wash option unless the load is genuinely filthy. It adds an extra fill and heat cycle for very little extra cleaning on ordinary laundry, which quietly inflates the washing machine cost for no real benefit.
Does a limescale build-up push up the washing machine cost?
In a hard water area, yes, gradually. Limescale coats the heating element inside the machine over time, and a coated element takes longer to heat the same amount of water to the same temperature. That extra time is extra electricity, quietly nudging up the washing machine cost cycle after cycle without anything actually breaking.
A machine descaler run every couple of months in a hard water area, or an in-line water softener for the household generally, keeps the element working as it should. It’s a small, occasional job that mostly pays for itself in a shorter, cheaper heating time rather than in any dramatic saving.
Frequently asked questions about washing machine running costs
- Does a bigger washing machine cost more to run?
- A larger drum can cost slightly more per full cycle, but it usually costs less per item washed, since you need fewer cycles overall for the same amount of laundry.
- Is a cold wash actually enough to clean clothes properly?
- For everyday laundry, generally yes, thanks to modern detergents built for lower temperatures. Genuinely soiled loads or anything needing a hygiene wash still benefit from higher heat.
- Does spin speed affect the washing machine cost much?
- Only slightly. A higher spin speed uses a little more electricity but can shorten tumble dryer time afterwards, which usually saves more overall than it costs.
- Are newer washing machines cheaper to run than older ones?
- Usually, yes. A modern A-rated machine can use noticeably less water and electricity per cycle than a machine from a decade or more ago.
- Will the October price cap change affect my washing machine cost?
- Only slightly. The electricity unit rate due to apply from 1 October 2026 is close to today’s rate, so a typical wash won’t move much in price either way.
None of this calls for a new machine or a laundry schedule spreadsheet. Knowing the washing machine cost by temperature just makes the choice at the dial an informed one instead of a guess. Roo’s version of laundry advice is refreshingly short: cooler, fuller, less often. If you want the full ranking of what else in the house is quietly expensive to run, our appliance running costs guide covers it, and the same logic behind cheaper overnight washes applies to Economy 7 and off-peak tariffs if you’re often running the machine after dark anyway. The rates used throughout come from Ofgem’s published price cap unit rates.
