Start With the Tariff, Not the Thermostat

Before you turn anything down or start wearing two jumpers indoors, check what you're actually paying for each unit of energy. It sounds dull, but it's the highest-return half-hour you'll spend on your household bills all year. Plenty of households are still sitting on a default or standard variable tariff simply because nobody ever moved them off it, and the difference between that and the best available deal can be hundreds of pounds a year.

• Find your unit rates and standing charge on your latest bill or in your online account. Write the two numbers down next to each other: pence per kilowatt-hour for electricity and gas, plus the daily standing charge.
• Compare like with like. A cheaper unit rate with a high standing charge can work out worse in a small flat, and better in a large family home. Estimate your annual usage from a year's worth of bills if you can.
• Check exit fees before you switch, and note whether the deal is fixed or variable. A slightly higher fixed rate can be worth it for the certainty alone.
• Submit a meter reading every month. If you have a smart meter, check the in-home display now and then rather than letting it gather dust. Estimated bills hide overpayment for months.

It's also worth a quick check on whether you qualify for any support your supplier or the government offers — cold weather payments, warm home discounts and similar schemes are sometimes claimed by fewer people than you'd expect.

Run Your Heating on a Schedule, Not on Impulse

Heating and hot water are typically the largest slice of a household energy bill, so small adjustments here do the heavy lifting. The trick isn't to be cold; it's to stop paying for heat you're not using.

• Set a schedule that matches your week. Warm the house for the hour before you get up and the hour before you're home, then let it drop. Constant heating with the windows open is the most expensive way to live.
• Turn the thermostat down by one degree. Most homes don't notice it, and it can trim roughly a tenth off heating costs. Eighteen to twenty degrees suits most living rooms.
• Turn down the boiler flow temperature if you have a combi boiler — often to around 55–60°C for heating. It runs longer at a lower temperature, which is more efficient.
• Use thermostatic radiator valves. Turn off or down the radiators in bedrooms and spare rooms you barely use, and keep doors closed so heat stays where you want it.
• Bleed radiators once a year and don't hang laundry or drape curtains directly over them.

Cheap draught-proofing pays back fast: a brush strip on the front door, a chimney balloon, a letterbox flap and a sausage-dog draught excluder are all under a tenner and all make a difference.

Hunt Down the Standby Load

Anything with a little light on, a screen waiting, or a warm plug is quietly drawing power. Individually it's pennies; added up across a house it's often £50–£70 a year for nothing at all.

• Walk around at night with the lights off and look for glowing LEDs. Games consoles, set-top boxes, printers, soundbars and old chargers are the usual suspects.
• Put the entertainment cluster on a switched extension lead and flick it off at the wall before bed. One switch, five devices.
• Use timer plugs for things you forget — a router doesn't need switching off, but a printer or a spare TV in a guest room probably does.
• Turn off at the wall rather than leaving items on standby, and unplug chargers once devices are full.

Make Your Appliances Work Harder

How you use appliances matters as much as how efficient they are. A tumble dryer is the hungriest thing in most kitchens, costing somewhere around 60–90p a load, so it deserves the most attention.

• Wash at 30°C and use full loads. Modern detergents cope fine, and heating the water is most of the cost.
• Air-dry whenever possible. If you must tumble, spin clothes faster first — they'll dry in less time.
• Keep the fridge at 3–5°C and the freezer at -18°C. Colder than that costs money and doesn't keep food better. Check door seals with the paper test and keep the fridge out of direct sun.
• Only boil the water you need, and descale the kettle — limescale makes it work harder.
• Fit an aerated shower head and shorten showers by a minute or two. On a water meter, that saves twice.

Trim the Recurring Costs Nobody Audits

Energy gets the attention, but subscriptions, broadband and insurance quietly creep upwards every year. Set aside twenty minutes with your bank statement and list every regular payment.

• Cancel anything you haven't used in three months. Be honest.
• Check whether annual payments beat monthly ones for anything you do keep.
• At renewal, ask for the current customer price rather than accepting the automatic increase. It's a two-minute phone call.

Make It Stick Without Willpower

None of this requires a spreadsheet or a hair shirt. Pick two things this week — usually the tariff check and the heating schedule — and leave the rest for later. Then set a monthly reminder to submit meter readings, glance at your usage and skim your subscriptions. Four small reviews a year will keep you ahead of the slow drift that pushes bills up, and you'll barely notice you've changed anything at all.