How Much Electricity
Does a Dishwasher Use?
A dishwasher is one of the easier appliances to budget for because cycle behaviour is consistent. The honest UK 2026 figure is roughly 1 to 1.8 kWh per cycle plus a clear ladder of cost savings if you switch from intensive to eco mode.
A typical UK domestic dishwasher uses 1 to 1.8 kWh of electricity per cycle depending on programme plus model age. At the current Q2 2026 Ofgem unit rate of 24.7p per kWh, that means 25p to 44p per cycle. Eco programmes use 0.8 to 1.2 kWh (20p to 30p per cycle). Intensive cycles use 1.5 to 2.2 kWh (37p to 54p). For daily users, annual cost runs roughly £90 to £160. For 4 cycles per week, annual cost is £52 to £92 depending on programme choice.
The figures that matter
Eco cycle
Lower temperature plus longer wash. Most efficient programme on modern dishwashers.
Normal cycle
Standard daily cycle. Balance of cleaning power plus efficiency.
Intensive cycle
Higher temperature plus longer wash. Used for heavily soiled loads.
Worst case
Older intensive cycle on a G-rated machine at 24.7p per kWh.
Four things to consider
Eco saves 30%+
Eco mode uses lower temperature plus longer wash. Counterintuitively the longer wash uses less energy than the higher temperature would.
Full loads only
A half-empty dishwasher uses the same electricity as a full one. Wait until full before running a cycle.
Old models cost more
Pre-2015 dishwashers can use 50 percent more electricity per cycle than current A-rated models.
Skip pre-rinse
Modern detergents handle food residue. Pre-rinsing in the sink wastes hot water that has to be heated.
Where the electricity goes inside a dishwasher cycle
A dishwasher uses electricity for three things: heating water, running the pumps plus the drying phase at the end. Heating water is by far the largest draw, accounting for roughly 80 percent of the cycle's total energy use.
Real numbers at 24.7p per kWh (Q2 2026 Ofgem cap):
- Eco programme (0.8 to 1.2 kWh). 20p to 30p per cycle. £73 to £110 per year at daily use.
- Normal programme (1 to 1.5 kWh). 25p to 37p per cycle. £91 to £135 per year at daily use.
- Intensive programme (1.5 to 2.2 kWh). 37p to 54p per cycle. £135 to £198 per year at daily use.
- Older D-rated dishwasher. Roughly 50 percent higher than the figures above on every programme.
Why eco mode is cheaper despite running longer. Eco programmes wash at a lower temperature (typically 50°C versus 65°C on normal). Heating water from cold to 50°C uses substantially less energy than heating it to 65°C. The longer wash time compensates for the lower temperature so cleaning results match. Net energy use drops by 30 to 40 percent versus the equivalent normal cycle.
What pushes dishwasher running costs higher:
- Half loads. A half-empty machine uses the same electricity as a full one. Wait until full or use the half-load setting if available.
- Pre-rinsing in hot water. Wastes the energy used to heat that water. Modern detergents need food residue to work properly.
- Hard water without salt. Limescale builds up on the heating element making heating less efficient.
- Dirty filter. Reduces water flow which forces the pump to work harder for longer.
- Heated drying. Many dishwashers offer a no-heat air-dry option which saves 0.2 to 0.4 kWh per cycle.
Real number ranges
Dishwasher cost per cycle (UK 2026)
Inside a typical 90-minute dishwasher cycle
Pre-wash
Cold rinse to remove loose debris. Pump runs at low draw. Energy use minimal.
Main wash
Water heated to 50 to 65°C. The heating element pulls 1.8 to 2.2 kW during this phase. Bulk of cycle energy.
Rinse cycles
Two or three rinses with warm water. Element cycles on briefly between rinses.
Drying
Heat dry adds 0.2 to 0.4 kWh. Air dry option costs nothing. Total cycle 1 to 1.8 kWh depending on programme.
Four ways to cut dishwasher running costs
Use eco mode by default
Eco saves 30 to 40 percent versus normal cycle. Switch to normal only when eco is genuinely insufficient.
Always run a full load
Half-loads waste roughly 50 percent of the energy per dish washed. Wait until the dishwasher is full.
Skip the heated dry
Open the door at the end of the cycle plus let dishes air dry. Saves 0.2 to 0.4 kWh per cycle.
Add salt plus check the filter
Salt prevents limescale on the heating element. Clean the filter monthly to maintain water flow.
Compare the options
Modern dishwasher (A-rated, eco mode)
- ✓0.8 to 1.2 kWh per cycle on eco mode.
- ✓20p to 30p per cycle at 24.7p per kWh.
- ✓Uses 9 to 12 litres of water per full load.
- ✓Heats water once to the optimal temperature.
- ✓£73 to £110 per year at daily use.
Hand washing in hot water
- ✗Equivalent to 1.5 to 2 kWh when factoring in hot water heating.
- ✗Roughly 37p to 49p per equivalent load when hand washing in continuously running hot water.
- ✗Uses 30 to 60 litres of water for the same number of dishes.
- ✗Constantly reheating water as the tap runs.
- ✗£135+ per year for typical daily dish washing in hot water.
Dishwashers are one of the more efficient kitchen appliances when used correctly. Our full Appliances hub covers running costs across every major UK household appliance.
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This article is one chapter inside our complete Appliances knowledge base. The hub covers running costs across every major household appliance from kettles to heat pumps.
More on appliance running costs
Three further kitchen appliance articles in the same hub group cover related running costs. The first is how much electric does a washing machine use for the partner kitchen appliance. The second covers how much electricity does a kettle use for one of the most-used UK kitchen items. The third is how much electricity does an air fryer use for cooking comparison.