When Is the Right Time to Switch Energy Supplier?

If you’re a business owner in the UK, you’ve probably wondered whether you’re paying too much for energy. The answer, more often than not, is yes. But the question that really matters is: when should you actually do something about it?

The contract end date is everything

Your energy contract has a fixed end date. This is the single most important date in your energy calendar, and most businesses don’t know what theirs is.

Here’s why it matters: if you don’t act before your contract ends, your supplier will roll you onto what’s called a “deemed” or “out of contract” rate. These rates are significantly higher — sometimes 40-60% more than what you’d get on a negotiated contract. It’s essentially a penalty for not paying attention.

The sweet spot for switching is 3-6 months before your contract ends. This gives you enough time to compare the market properly without rushing into a bad deal.

What about market conditions?

Energy prices fluctuate constantly. Wholesale gas and electricity prices shift based on global supply, weather, geopolitical events, and seasonal demand. You can’t time the market perfectly, but you can be smart about it.

A few things to watch for:

• Summer months (May-August) tend to see lower gas prices because demand drops. This can be a good window for locking in rates.
• Winter (October-March) typically sees higher prices as heating demand spikes.
• Global events — conflicts, supply disruptions, extreme weather — can push prices up quickly and unpredictably.

The reality is that waiting for the “perfect” price is a bit like waiting for the perfect time to invest. It rarely comes. What matters more is making sure you’re not overpaying right now.

Signs you should switch sooner rather than later

There are a few situations where you shouldn’t wait:

1. You’re on a rollover or deemed rate. If your contract expired and you didn’t renew, you’re almost certainly overpaying. Switch immediately.
2. Your broker hasn’t been in touch. A good broker should be proactively managing your renewals. If you haven’t heard from yours, that’s a red flag.
3. You don’t know what you’re paying. If you can’t quickly tell someone your unit rate for gas and electricity, it’s time to get clarity.
4. Your business has changed significantly. If your energy consumption has gone up or down substantially, your current contract might not be the right fit anymore.

What happens when you switch?

Switching supplier doesn’t mean any disruption to your supply. The physical infrastructure stays the same — the pipes and wires don’t change. What changes is who bills you and at what rate.

The process typically takes 2-6 weeks from signing a new contract to the switch completing. During that time, your existing supply continues as normal. There’s no gap, no interruption, no engineer visit needed.

The bottom line

Don’t wait until your contract expires. Don’t assume your current deal is competitive just because it was competitive when you signed it. And don’t let inertia cost you money.

If your contract ends in the next six months — or if you’re not sure when it ends — that’s your signal. Get in touch and we’ll tell you exactly where you stand.