The label in one minute
Since 1 March 2021, washing machines in the UK carry an energy label rated from A (most efficient) to G. The old A+++ scale is gone, and the old label’s annual figure based on 260 cycles a year was replaced with consumption per 100 cycles. The rating comes from how much energy the machine uses over 100 cycles of the Eco 40-60 programme.
| Label item | What it tells you |
|---|---|
| Energy class (A-G) | Efficiency on the Eco 40-60 programme, adjusted for drum size |
| kWh per 100 cycles | The energy figure behind the class: lower is better |
| Rated capacity (kg) | Maximum load for the Eco 40-60 programme |
| Water per cycle (litres) | Weighted water use per Eco 40-60 cycle; useful if you have a meter |
| Programme duration | How long a full-load Eco 40-60 cycle takes |
| Spin-drying efficiency class (A-G) | How much water the spin removes |
| Noise (dB) and class (A-D) | Airborne noise during the spin |
| QR code | Links to the full product record in the EU/UK database |
Example
The Samsung WW11DB8B95GBU1 (11kg) is class A, uses 32 kWh per 100 cycles and 54 litres per cycle, has spin class B and a spin noise of 72dB (class A).
What the label does not tell you
- How well it cleans. Which? warns that some of the most energy-efficient machines it tested were poor at cleaning.
- Your real use. Research from Delft University of Technology found Eco settings were used for only about 15% of washes. Quick and hot washes use more energy.
- Washer dryers show two classes: one for washing only and one for the full wash-and-dry cycle, which is usually much lower.
How much will it cost me?
Under the October 2026 energy price cap, Which? estimates a washing machine costs from about £27 to almost £120 a year to run. Drum size is the biggest factor. Use the calculator below with the kWh figure from any label and your own tariff.
Running cost calculator
Estimate based on Eco 40-60 use. Hotter and longer programmes cost more.
Does an A rating pay off?
The difference between classes on the same drum size is often a few kWh per cycle. Use the calculator with two labels side by side: if a cheaper B-rated machine costs only a few pounds more a year, it may still be the better buy. Balance efficiency with cleaning, noise and reliability, as we do in our best washing machines list.
Tips to cut running costs
- Use the Eco 40-60 or 30C programmes for everyday loads.
- Run full loads, but do not overload the drum.
- Use delay start with an off-peak or time-of-use tariff.
- Do not overdose detergent: it can mean extra rinses. Auto-dosing machines help.
- Keep the filter clean, as explained in our problems and care guide.
Choosing a new machine? Our buying guide covers everything else to check.