Electric Shower Running Cost: Price Per Shower in 2026

How much does an electric shower cost to run?

At Ofgem’s Great Britain Direct Debit comparison rate of 26.32p per kWh for 1 October to 31 December 2026, a 10-minute shower costs about 37p with an 8.5 kW unit, 42p with a 9.5 kW unit or 46p with a 10.5 kW unit. These are electricity costs only. Water charges may also matter if your home has a water meter.

Ofgem’s figure is an average price-cap rate for England, Scotland and Wales, not a universal tariff. Regional rates, payment methods, fixed deals and time-of-use tariffs vary. Northern Ireland has a separate electricity market. Use the pence-per-kWh figure on your own bill or supplier app for a personal result.

• 8.5 kW for 10 minutes: 1.42 kWh; about 37p at 26.32p/kWh.
• 9.5 kW for 10 minutes: 1.58 kWh; about 42p at 26.32p/kWh.
• 10.5 kW for 10 minutes: 1.75 kWh; about 46p at 26.32p/kWh.
• 9.5 kW for five minutes: 0.79 kWh; about 21p at 26.32p/kWh.

Use this electric shower cost formula

The formula is: cost = shower power in kW × shower time in hours × electricity unit rate in pounds. Divide minutes by 60 to convert them to hours. If your tariff is shown in pence per kWh, you can keep the calculation in pence or divide the rate by 100 to use pounds.

Worked example: a 9.5 kW shower runs for eight minutes on a tariff charging 26.32p per kWh. Eight minutes is 8 ÷ 60 = 0.1333 hours. Energy use is 9.5 × 0.1333 = 1.27 kWh. Cost is 1.27 × 26.32p = 33.34p, rounded to 33p.

Find the rating on the shower casing, installation guide or manufacturer’s product information. Do not remove the cover. Current ranges include several ratings, so guessing from appearance is unreliable. Unless the instructions explain the power settings, treat the nameplate rating as a cautious full-power estimate.

Daily, monthly and annual electric shower costs

For one 10-minute 9.5 kW shower every day, the estimate is about 42p a day, £12.50 over 30 days and £152.11 over 365 days at 26.32p per kWh. Citizens Advice gives a broad average of about £137 a year for a daily 10-minute electric shower using its own assumptions. Your rating, duration and rate are the better inputs.

Four eight-minute showers in one day on a 9.5 kW unit use about 5.07 kWh and cost about £1.33 at the same rate. Repeated every day, that is about £486.74 a year. Real household totals vary with shower frequency, duration, power setting and tariff.

What changes the cost per shower?

Time has the clearest effect. At the same power and tariff, a five-minute shower uses half the electricity of a 10-minute shower. The unit’s electrical rating also matters: a 10.5 kW model can heat more water per minute or achieve a stronger flow at a given temperature, but at full power it costs more per minute than an 8.5 kW model.

Incoming water is colder in winter, so a shower may need a lower flow to reach the same outlet temperature. The temperature control can change water flow as well as electrical operation. Do not assume a hotter dial position causes a proportional rise in kWh; check the model instructions.

The standing charge does not change with shower use. Include it once in a whole-bill estimate, but leave it out when comparing the extra cost of a five-, eight- or 10-minute shower.

How much could a shorter shower save?

Reducing a daily 9.5 kW shower from 10 minutes to eight minutes saves about 0.32 kWh and 8.3p each day at 26.32p per kWh. Over a year, the simple saving is about 115.6 kWh and £30.42. For two people making the same change every day, double those figures.

Energy Saving Trust recommends shorter showers and suggests a four-minute timer. Its published savings are broad averages across different hot-water systems, so use the electric-shower calculation above for your unit. A timer or clock can make the change easy to repeat.

Use the right shower head and maintain the unit

Do not fit a generic low-flow or water-efficient shower head to an electric shower unless the shower manufacturer confirms compatibility. nidirect warns that flow regulators and water-efficient heads should not be fitted to electric showers because restricting flow can cause the water to overheat. Advice written for mixer showers is not automatically suitable for an instantaneous electric unit.

Use only compatible heads and hoses, keep spray holes clear as directed, and do not obstruct the outlet. If flow weakens or temperature fluctuates, check the user guide and arrange qualified help rather than dismantling the unit.

Electrical safety comes before savings

An electric shower is a high-power fixed appliance in a wet room. Electrical Safety First says it must be installed by a registered competent electrician on its own circuit, and that bathroom circuits are now required to have residual-current-device protection. Do not connect a shower through an extension lead or attempt to open, rewire or uprate it yourself.

Stop using the shower and seek competent help if a breaker trips repeatedly, you notice burning smells or unusual noises, the casing is damaged, or water appears where it should not. A higher-rated replacement requires professional assessment of the cable, protective device, circuit and water supply.

A practical way to check your household figure

First, record the shower’s kW rating and your actual unit rate. Second, time a few normal showers rather than relying on a guess. Third, calculate each person’s weekly kWh and add the results. Finally, compare this estimate with meter readings taken at similar times on comparable days, remembering that fridges, heating and other appliances may be running too.

A plug-in energy monitor is not suitable for a fixed electric shower. Ask a qualified electrician if you need circuit measurement. For most households, the rating-and-time formula is enough to compare shower routines.