How Much Does a Washing Machine at 40C Cost to Run?
Updated March 2026. Default rate effective 1 April 2026 (Ofgem Q2 2026). Figures are typical estimates rather than model-specific guarantees.
A 40C wash is a common default setting, but it usually costs more than 30C because more energy goes into heating the water.
Calculator24.5p/kWh
W
times
min
p/kWh
Per use
19.6p
Per day
14.0p
Per week
98.0p
Per month
£4.26
Annual cost
£51.10
Typical annual electricity use: 208.57 kWh
Based on typical washing machine at 40c usage at current rates.
Annual estimate
£51.10
Annual electricity use
208.57 kWh
Typical household bill context
About 8% of a typical home's annual variable electricity spend at the current default rate.
What Affects the Cost of Running a Washing Machine at 40C?
The wash temperature is the main cost difference. The appliance is the same type, but the hotter programme keeps the heating element working harder during the cycle.
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Assumptions and methodology
- Electricity rate: 24.5p/kWh (Ofgem Q2 2026)
- Default wattage is based on a typical appliance in this category
- Usage assumptions are meant to be a sensible starting point, not a fixed rule
- Costs vary with tariff, model, settings, load size, and household habits
Tips to Reduce Washing Machine at 40C Running Costs
Keep 40C for loads that genuinely need the extra heat. For everyday clothing, 30C often does the job with a lower electricity cost.