The Cost Comparison: Showers vs Baths

One of the most common questions we hear from UK households trying to reduce their energy bills is whether it’s cheaper to shower or take a bath. The answer is straightforward: showers are almost always cheaper than baths, but the savings depend on several factors including your boiler type, water temperature, and shower duration.

According to Ofgem’s latest data, the average UK household spends around £1,100 annually on heating water. By making smart choices about how you wash, you could shave hundreds of pounds off this figure each year.

How Much Does a Bath Cost?

A typical bath requires approximately 80-100 litres of hot water. At current energy rates (around 24p per kWh for electricity and 6p per kWh for gas, as per Ofgem’s price cap), running a bath costs roughly £0.80 to £1.20 per bath using a gas boiler. If you have an electric shower or immersion heater, expect to pay £1.50 to £2.00 per bath.

If your household takes just one bath daily, that’s £292 to £438 annually on baths alone. For families with multiple bath-takers, these costs escalate quickly.

How Much Does a Shower Cost?

The cost of showering depends significantly on how long you stay under the spray. A modern, water-efficient shower head (delivering 9 litres per minute) used for a 5-minute shower costs approximately £0.15 to £0.30 using a gas boiler. An electric shower typically costs £0.40 to £0.60 for the same duration.

Even if someone in your household enjoys longer showers, say 10-15 minutes, the cost remains substantially lower than a bath. A 15-minute shower with a standard shower head would cost around £0.45 to £0.90 with gas heating—still roughly half the cost of a single bath.

The Real Savings: Annual Impact

Let’s look at realistic scenarios. Consider a family of four where everyone currently takes one bath every other day:

• Current cost (baths): Approximately £584 annually
• If they switched to 5-minute showers: Approximately £219 annually
• Annual saving: Around £365

Over a five-year period, that’s £1,825 saved before any energy price increases. These figures make the case for showers quite compelling, especially when you consider that Ofgem’s price cap continues to fluctuate.

Why Are Showers Cheaper?

The mathematics is simple: showers use less water than baths. You’re heating less water overall, which means lower energy consumption. Even if you shower for longer than the recommended five minutes, you’ll generally use less water and less energy than filling a bathtub.

Additionally, shower water is heated on-demand (especially with combi boilers), whereas bath water sits in a tub, allowing some heat to dissipate before you even get in. This inefficiency makes baths inherently more wasteful.

Types of Heating Systems and Their Impact

Your heating system affects how much you’ll spend. Gas boilers are typically the most economical for heating water, which is why most UK households use them. However, if you have an electric shower or immersion heater, expect higher costs per unit of water heated.

Heat pump systems and renewable energy installations may offer different cost profiles. If you’re using solar thermal panels or a heat pump, marginal water heating costs are considerably lower, making both baths and showers more affordable options generally.

Regardless of your system, showers remain the more cost-effective choice.

Practical Ways to Reduce Shower Costs Further

Simply switching from baths to showers gets you most of the way there, but you can do more:

• Install a water-efficient shower head: These cost £15-40 and can reduce water flow by 20-30% without noticeably affecting pressure. The payback period is typically just a few months.
• Limit shower time: A 5-minute shower is the recommended duration. Use a timer or playlist to keep yourself on track.
• Fix leaks promptly: A dripping hot tap can waste over £100 per year in wasted water and energy.
• Lower your boiler thermostat: Set it to 60°C instead of 65°C. You’ll barely notice the difference when mixing with cold water, but energy savings are significant.
• Insulate pipes: Hot water pipes, especially in unheated spaces like lofts, lose heat. Pipe insulation costs £5-15 and reduces heat loss substantially.

The Occasional Bath Dilemma

We’re not suggesting you never take a bath again. Occasional baths are part of life and can be wonderful for relaxation or for bathing young children more safely. The key is making them the exception rather than the rule.

If you do take the occasional bath, try filling it only three-quarters full rather than to the brim. This simple step can reduce your bath cost by 25% and uses less water overall—beneficial for both your bills and the environment.

Don’t Forget to Check Your Energy Tariff

While you’re optimising your shower and bath habits, it’s equally important to ensure you’re on the best energy tariff. If you haven’t switched suppliers or reviewed your deal in the past six months, you could be overpaying significantly.

Use Ofgem-approved comparison tools to check whether a different supplier or tariff could save you money on top of these water heating efficiencies. Many households discover they could save £100+ annually simply by switching providers.

The Bottom Line

Showers are definitively cheaper than baths for UK households. A typical family could save £300-500 annually by primarily showering instead of bathing, depending on their current habits and heating system. Combine this with a water-efficient shower head, shorter shower times, and a competitive energy tariff, and you’re looking at substantial savings that benefit both your wallet and the environment.

Take Action Today

Start your savings journey now. First, replace shower heads with efficient models and establish a household shower time limit of five minutes. Second, review your energy tariff to ensure you’re paying a fair price for the gas or electricity powering your heating system. If you haven’t switched suppliers recently, visit Ofgem’s comparison guidelines and check what deals are available in your postcode. Small changes compound into significant savings—why wait? Switch to showers, upgrade your shower head, and review your energy supplier this week. Every pound saved on heating water is a pound staying in your pocket.