How to Reduce Energy Bills at Home

Energy is one of those household costs that feels outside your control, yet a surprising amount of it is down to habits, settings and a few cheap fixes. If you want to reduce energy bills without sitting in the cold, the best approach is to tackle the biggest uses first, then work down the list.

Prices, tariffs, grants and building rules differ by country and by supplier, so treat this as a general framework. Where figures matter, check your own bills and local official sources.

Step 1: Understand your bill

You can’t cut what you can’t see. Pull out your latest bills, or log in to your supplier’s online account, and look for:

• Unit price (for each kWh of electricity or gas, or the equivalent where you live)
• Standing charge, if there is one, which you pay regardless of use
• Your usage over the last year, ideally month by month
• Contract end date and any exit fees

If you have a smart meter or an in-home display, watch how usage changes through the day. A quick experiment: note the reading just before bed and again in the morning. If the overnight use is high, something is running that shouldn’t be.

Most homes find that heating is the biggest piece, followed by hot water, then appliances and lighting. Prioritise accordingly.

Step 2: Check your tariff and supplier

A tariff check is free and can be the easiest saving. Compare:

• Whether you are on a standard variable or default plan, which is often more expensive than fixed deals
• Fixed-rate plans, which protect against price rises but may carry exit fees if you leave early
• Time-of-use tariffs, which charge less at off-peak hours and may suit homes that can shift usage, such as those with electric vehicles or batteries
• Any green tariffs, if that matters to you

Use independent, regulator-approved comparison tools where available, and read the small print. Prices change often, so don’t rely on figures in articles. If your usage is low, a plan with a low standing charge may suit you better; if it is high, the unit rate matters more.

Step 3: Turn down the biggest user, heating

Adjust the thermostat sensibly

Lowering your thermostat by a small amount can reduce heating use, though the exact saving depends on your home and climate. Find the lowest temperature that you are comfortable at, and wear a jumper or use a blanket before reaching for the dial.

Use timers and zones

Heat rooms when you are using them. Programmable thermostats, timers and smart heating controls can help, as can thermostatic radiator valves that let you set different temperatures in different rooms. Avoid heating empty rooms.

Maintain the system

• Bleed radiators if they have cold spots at the top
• Have boilers serviced as recommended by the manufacturer
• Keep radiators clear of furniture and heavy curtains
• Place reflective foil behind radiators on external walls if suited to your home

Don’t blast it

Turning the thermostat way up does not heat the house faster. It simply runs the system for longer or leads to overshoot.

Step 4: Stop heat escaping

A home that loses heat quickly makes every other saving harder.

Draughts

Check around windows, doors, letterboxes, loft hatches, pipework entries and unused chimneys. Cheap solutions include draught excluders, brush strips, sealant and chimney balloons or caps. Do not block ventilation that is needed for safety, such as vents for gas appliances or ventilation in kitchens and bathrooms. If in doubt, ask a qualified professional.

Windows and curtains

Close curtains at dusk to keep heat in and open them on sunny days to let warmth in. Thick or lined curtains help. Secondary glazing film is a budget option where double glazing is not possible.

Insulation

Loft and wall insulation are among the more effective upgrades in many homes, though they cost more upfront. Look for grants or low-cost schemes offered by governments or utilities in your area. Use a reputable, accredited installer, and get more than one quote.

Step 5: Cut hot water costs

• Shorter showers. Reducing shower time by a minute or two lowers the water heated.
• Efficient showerheads. Low-flow models can reduce use if you still like the pressure.
• Lower the cylinder or boiler temperature. Check what is safe and suitable for your system; some set-ups need a minimum temperature to guard against bacteria. Ask a qualified plumber or heating engineer before changing anything.
• Insulate the tank and pipes. A jacket on a hot water cylinder is cheap and effective.
• Wash clothes at lower temperatures. Modern detergents work well at 30 degrees Celsius for most loads.

Step 6: Appliances and electronics

Know the big users

Fridges and freezers run all day, electric ovens, tumble dryers and immersion heaters use a lot when on, and standby loads add up across a house full of devices.

• Dry washing on a rack or line where possible, rather than using a tumble dryer
• Use the oven efficiently. Batch cook, avoid preheating for long, and use a microwave, air fryer or slow cooker for smaller meals if they are more efficient for your tasks
• Defrost the freezer regularly if it is not frost-free, and keep fridge seals clean
• Set the fridge to a recommended temperature instead of colder than necessary
• Run full loads in dishwashers and washing machines, and use eco settings
• Switch off standby devices. A power strip with a switch makes this easier
• Unplug chargers that are not in use

Lighting

Replace remaining old bulbs with LEDs, which use far less electricity and last longer. Start with the lights you use most.

Step 7: Small habits that add up

• Put a lid on pans, and use the right size ring or burner
• Use a kettle to heat only the water you need
• Close doors to keep heat in the rooms you are using
• Use natural light during the day
• Cook with leftover heat by switching off a little early
• Share rooms in winter evenings if that is practical for your household

None of these is dramatic alone, but together they matter.

Step 8: Get help if you are struggling

If bills are unaffordable, contact your supplier early. Many offer payment plans, hardship funds or priority support for vulnerable households. Independent advice services and local councils may also help, and there are often schemes for low-income households or those with medical needs. Check official government websites to avoid paying for something that is free.

A short action plan

1. Read your bill and note your tariff and contract end date
2. Compare tariffs and switch if it makes sense
3. Fix draughts and adjust heating schedules
4. Lower the hot water and washing temperatures where safe
5. Replace the most-used bulbs with LEDs
6. Review bigger upgrades once the cheap ones are done

For the wider picture of saving, see How to Save Money: A Practical Guide for 2026, and to see how much your energy fits into your overall spending, try How to Track Spending with a Simple Spreadsheet.

Frequently Asked Questions

What uses the most energy in a typical home?
In many homes, heating is the largest use, followed by hot water and then appliances. Your own pattern may differ, so check your bills.

Is it cheaper to leave the heating on low all day?
It depends on the home and system. In a well-insulated house, steady low heat can work, while in a draughty one it may waste energy. Use timers and test what suits your home.

Do energy-saving gadgets really work?
Some do, such as LED bulbs, draught-proofing and smart thermostats. Be sceptical of devices that claim big savings with no changes in how you use energy.

Should I switch to a fixed tariff?
It depends on your tolerance for risk and the prices on offer. Compare the terms, including exit fees.

Summary

Know your bill, check your tariff, control heating, stop heat escaping and tackle the largest users first. Start with free changes, then plan bigger upgrades as you can afford them.