How Often Should You Switch Energy Provider? Expert Advice (2026)

Here’s the short answer: you should review your energy deal at least once a year, and switch whenever you find a better offer. If you’re on a fixed tariff, start comparing deals 6–8 weeks before your contract ends. If you’re on the standard variable tariff (SVT), you’re almost certainly overpaying right now and can switch immediately with no exit fees.

The energy market rewards disloyalty. Suppliers reserve their best prices for new customers, while existing customers who do nothing get rolled onto the SVT — which is pegged to the energy price cap and is nearly always the most expensive option available. This means that every year you don’t switch, you’re likely paying hundreds of pounds more than you need to.

In practice, the most cost-effective approach is to switch every 12 to 18 months when your fixed deal expires, or sooner if a significantly cheaper tariff becomes available. Some particularly engaged households check for deals quarterly, timed around Ofgem’s price cap announcements.

Not sure what tariff you’re actually on? Our savings calculator can help you check in seconds.

Staying with the same energy supplier year after year is one of the most expensive habits in the UK. Unlike a loyalty programme at your local coffee shop, energy suppliers do not reward you for sticking around. In fact, the opposite is true.

When your fixed tariff expires, your supplier automatically moves you onto their standard variable tariff. This is the default rate — and it’s designed to be expensive. The SVT is capped by Ofgem, but the cap is set at a level that represents the maximum a supplier can charge, not the minimum you should pay.

Figures based on typical dual-fuel consumption of 2,700 kWh electricity and 11,500 kWh gas. Actual savings vary by region and usage.

The numbers are clear: doing nothing is the most expensive option. Over five years, a household that never switches could overpay by £900 or more compared to one that switches annually. And that’s a conservative estimate — during periods of high price volatility, the gap can be even wider.

While you can switch at any time, certain periods tend to offer better deals than others. Understanding the market’s rhythm can help you time your switch for maximum savings.

After price cap announcements

Ofgem updates the energy price cap every quarter (January, April, July and October). Suppliers typically launch their most competitive fixed deals in the weeks following a cap announcement, especially if the cap has increased. This is when they’re most aggressively competing for new customers.

Late spring and early summer (April–June)

Energy demand drops as the weather warms up, and suppliers often release attractive deals to maintain customer numbers. Historically, some of the cheapest tariffs of the year appear during this window.

When your fixed deal is ending

Regardless of time of year, the most important moment to switch is 6–8 weeks before your current fixed tariff expires. Your supplier is required to notify you at least 42 days before your deal ends. When you receive that letter or email, treat it as an alarm bell — start comparing immediately.

When wholesale prices drop

If you see news reports about falling wholesale energy prices, that’s a signal that cheaper fixed deals may be coming. Suppliers don’t always pass on wholesale savings immediately, but competitive pressure usually forces the cheaper tariffs to appear within a few weeks.

The worst time to switch? Never. Even switching at a less-than-ideal time is almost always better than staying on the SVT.

Not sure whether now is the right time? Here are the clear signs that you should start comparing energy deals immediately:

• Your fixed deal has expired. If you received a “tariff ending” letter and did nothing, you’re now on the SVT and overpaying. Switch as soon as possible.
• You’ve been on the same tariff for over 12 months. Even if you’re on a fixed deal, it’s worth checking whether a cheaper one has appeared since you signed up.
• Your bills have gone up unexpectedly. If your usage hasn’t changed but your costs have increased, your tariff may have been repriced or you may have rolled onto the SVT. Our guide on why your electricity bill is so high covers this in detail.
• You’ve just moved house. When you move, you inherit the previous occupant’s supplier on a deemed tariff — which is usually the most expensive option. Switch within the first week.
• A price cap change has been announced. Each quarterly adjustment creates a window where new deals appear. Check within two weeks of the announcement.
• You don’t know what tariff you’re on. If you can’t name your tariff, you’re almost certainly on the SVT. Log into your supplier’s website or call them to check — then compare alternatives.

If any of these apply to you, the next step is simple: follow our step-by-step switching guide or request a free bill audit and we’ll do the comparison for you.

Auto-switch services promise to monitor the energy market for you and automatically switch you to a cheaper deal when one becomes available. It sounds convenient, but there are some important caveats to consider.

How they work

You sign up, provide your energy details, and give the service permission to switch suppliers on your behalf. When their algorithm finds a cheaper tariff, they initiate the switch automatically. Some notify you first and let you approve; others switch without asking.

The pros

• Hands-off approach — you don’t have to remember to compare deals yourself
• Consistent savings — you’re less likely to end up on the SVT through inaction
• Market monitoring — the service watches for deals you might miss

The cons

• Limited supplier panel — most auto-switch services only compare a subset of the market, so they may not find the absolute cheapest deal
• Fees — some charge a flat fee or take a percentage of your savings, reducing the benefit
• Loss of control — you may not want to switch to a supplier you’ve never heard of, especially if you value customer service
• No holistic view — they only look at energy, missing potential savings on other household bills

Our recommendation: auto-switch services are better than doing nothing, but a personalised bill audit from an independent service like SaveFirst can usually find better savings because we look at your entire household spending — not just energy. And it’s completely free, with no ongoing fees.

The easiest way to make sure you never overpay is to build a simple reminder system. Here’s exactly what to do:

Step 1: Find your contract end date

Log into your energy account or check your latest bill. Note the date your current fixed tariff expires. If you’re on the SVT, there is no end date — you can switch right now.

Step 2: Set a calendar reminder

Add a reminder 8 weeks before your deal ends. This gives you enough time to compare deals, choose a new tariff and complete the switch before you roll onto the SVT. Set it as a recurring annual event so it fires every year.

Step 3: Keep your details handy

Save the following in a note on your phone so you’re ready to compare deals quickly when the reminder fires:

• Your current supplier and tariff name
• Your annual electricity usage in kWh
• Your annual gas usage in kWh
• Your MPAN (electricity) and MPRN (gas) — found on your bills

Step 4: Check your bills quarterly

After each Ofgem price cap announcement (January, April, July, October), spend 5 minutes checking whether a better deal has appeared. This is especially important if the cap has gone up and your fixed deal is competitive — or if the cap has dropped and cheaper deals are now available.

Step 5: Consider a free bill audit

If you don’t want to manage all of this yourself, request a free bill audit from SaveFirst. We’ll review your current spending, find the best available deals, and tell you exactly how much you could save — with no obligation and no cost.

If you want to explore whether switching your gas supplier separately could help, see our guide on whether it’s worth switching gas supplier.