Understanding Fixed vs Variable Tariffs

The decision to fix your energy tariff is one of the most important financial choices UK households face each year. Before diving into whether now is the right time, it’s crucial to understand what you’re actually choosing between.

A fixed-rate tariff locks in your unit rates for electricity and gas for a set period—typically 12, 24, or 36 months. This means your price per kilowatt-hour remains unchanged, regardless of market fluctuations. A variable tariff, conversely, changes regularly based on wholesale energy prices and Ofgem’s price cap.

The appeal of fixing is straightforward: certainty and protection against price rises. However, if energy prices fall significantly, you’ll be stuck paying the higher fixed rate you agreed to.

What’s Happening with Energy Prices Right Now?

As we move through 2024, the energy market remains volatile. After the dramatic price spike in 2021-2023, prices have stabilised somewhat, but they remain considerably higher than pre-pandemic levels. Ofgem’s price cap—which sets the maximum unit rates for customers on default tariffs—continues to influence the broader market.

Current fixed-rate deals are generally priced between 22-28p per kilowatt-hour for electricity and 6-8p for gas, depending on your region and supplier. These rates reflect genuine market conditions, not predictions of future movement.

The key question is: are these rates likely to become more expensive or cheaper in the coming months? Energy market analysts remain cautious, with factors like global geopolitical tensions, renewable energy investment, and seasonal demand all playing a role.

Calculate Your Current Costs

Before making any decision, establish your baseline. Check your latest energy bill to find:

• Your current unit rates for electricity and gas
• Your annual usage in kWh
• Your standing charges
• Your total annual bill

Next, use comparison websites like MoneySuperMarket, uSwitch, or Confused.com to see what fixed-rate deals are available. Be precise about your usage—overestimating could lock you into paying for more energy than you need.

Calculate the difference between staying on your current tariff (whether that’s a variable rate or an existing fixed deal nearing its end) versus switching to a fixed rate. Remember that the cheapest deal isn’t always the best if it includes additional fees or less reliable customer service.

Why You Might Want to Fix Now

There are several compelling reasons to consider locking in a rate today:

Budget certainty: Fixed tariffs eliminate surprises. If you’re budgeting carefully or on a tight household income, knowing exactly what you’ll pay each month is invaluable. This psychological benefit shouldn’t be underestimated.

Protection against uncertainty: Global energy markets remain unpredictable. Winter weather, international conflicts, and supply chain issues can push prices higher unexpectedly. A fixed rate protects you from this risk.

Avoiding potential price cap increases: While Ofgem can’t predict the future, some analysts suggest the price cap could drift upward again in late 2024 and 2025. Fixed rates lock you in below current market prices if this occurs.

Your current deal is expiring: If you’re on a fixed rate that’s ending soon, switching now to another fixed deal ensures you don’t accidentally roll onto an expensive standard variable rate.

Why You Might Want to Wait

However, there are also reasons to hesitate:

Market uncertainty works both ways: If energy prices fall substantially, you’ll regret having fixed at a higher rate. Some predictions suggest renewable energy investment and reduced global demand could push prices lower.

Shorter-term fixes offer flexibility: Rather than committing to 36 months at one rate, 12-month fixes give you more frequent opportunities to reassess and potentially move to cheaper deals.

You’re on a particularly cheap variable rate: If your current supplier is offering genuinely competitive variable pricing, the savings from fixing might not be worth losing flexibility.

You expect to move house: Switching properties mid-contract can be expensive, as you may face early termination fees. If relocation is likely, a shorter deal or variable rate offers more flexibility.

Key Factors to Consider

Beyond price, evaluate other important elements:

Contract length: Longer fixes offer more certainty but less flexibility. Consider your circumstances over the next 1-3 years.

Supplier reputation: Check Ofgem complaint data. A slightly more expensive tariff from a reliable supplier beats saving £20 yearly with a company that’s difficult to contact.

Additional features: Some fixed tariffs include things like loyalty rewards, smart meter incentives, or renewable energy options. These can add value beyond the headline rate.

Early exit fees: Understand what you’d pay if circumstances change and you need to switch before your contract ends. These fees vary dramatically between suppliers.

Payment method discounts: Paying by direct debit typically saves 10-15% compared to other methods. Ensure you’re taking advantage of this.

Our Recommendation

For most UK households, locking in a fixed-rate tariff now represents sensible financial management. While energy prices might fall, the risk of further increases—particularly heading into winter—outweighs the potential savings. A 12-month or 24-month fixed deal balances certainty with periodic opportunities to reassess your options.

However, if you’re in a particularly cheap variable deal, expect to move house soon, or have strong reasons to believe prices will drop, waiting a few more months is defensible.

Taking Action Today

Ready to fix your tariff? Follow these steps: First, gather your latest energy bills and current tariff details. Second, visit 2-3 comparison websites and filter for fixed-rate deals matching your contract length preference. Third, read the full terms—not just the headline price. Finally, switch promptly, as some deals fill quickly or rates change frequently.

Don’t let this decision paralyse you through inaction. The worst choice is paying inflated rates on a standard variable tariff while debating whether to switch. Get quotes today, compare genuinely competitive options, and take control of your energy costs.

Your action: Spend 30 minutes right now comparing fixed-rate deals. You could save hundreds of pounds annually, and that’s time well spent for any UK household.