How Much Does a Washing Machine at 30C 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 30C wash is usually the cheaper everyday option for clothing because far less energy is spent heating water than on hotter programmes.
Calculator24.5p/kWh
W
times
min
p/kWh
Per use
12.3p
Per day
8.8p
Per week
61.3p
Per month
£2.66
Annual cost
£31.94
Typical annual electricity use: 130.36 kWh
Based on typical washing machine at 30c usage at current rates.
Annual estimate
£31.94
Annual electricity use
130.36 kWh
Typical household bill context
About 5% of a typical home's annual variable electricity spend at the current default rate.
What Affects the Cost of Running a Washing Machine at 30C?
Most of the electricity cost comes from heating water. Lowering the wash temperature can cut the energy used per cycle without changing how often the machine is used.
Helpful guides
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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 30C Running Costs
Use 30C for everyday laundry when the fabric and detergent allow it. Save hotter washes for hygiene-critical loads or stubborn dirt.