Energy specialist: what they do, when you need one, and how to choose

When you usually need one

• You’re unsure whether to fix, stay variable, or switch (especially with exit fees).
• You have a prepayment meter (smart or key/card) and want cheaper options.
• You’ve got a smart meter and want to use time-of-use tariffs safely.
• Your billing looks wrong (estimated reads, back-billing worries, debt, Direct Debit swings).
• You’ve moved in and don’t know your supplier/meter type, or you’re on a deemed tariff.

Key takeaways (UK-specific)

• Tariffs differ by region (distribution area), meter type and payment method — not just usage.
• Standing charges matter, especially for low-use homes and second homes.
• Some deals are meter-restricted (e.g., smart-only time-of-use; some prepay limitations).
• If you’re in debt, you may still be able to switch depending on circumstances — but there are rules and it’s case-by-case.
• Always check exit fees, tariff end dates and whether discounts are conditional.

Decision checklist: who a tariff specialist suits

This suits you if:

You want a clear shortlist of tariffs you’re actually eligible for, and you’re ready to switch (or at least see realistic options for your meter/payment type).

It may not be the best first step if:

Your main issue is a disputed bill, a metering fault, or a formal complaint — start with your supplier, then use independent advice if unresolved.

Two realistic scenarios (with estimated numbers)

These examples show how tariff features (standing charge, unit rate, exit fees) can change the outcome. Numbers are illustrative, not quotes.

Pitfall 1: Not checking meter type

Some tariffs are smart-meter only, some are credit only, and prepayment availability can vary. If you’re unsure, your bill often states “prepayment” or “pay as you go”, and smart meters are usually labelled SMETS1/SMETS2.

Pitfall 2: Focusing only on unit rate

A cheaper kWh rate can be offset by a higher standing charge. This is especially important for low-use homes, single occupants, and properties that are empty for part of the year.

Pitfall 3: Exit fees and fixed end dates

Fixed tariffs may charge exit fees if you leave early. A specialist will help you weigh the exit fee against the estimated difference in cost and your likely timescale (e.g., moving home soon).

Pitfall 4: Direct Debit changes after switching

Your monthly payment can change if your supplier reassesses usage or you’ve built up a credit/debit balance. Keep an eye on your first few statements and submit readings if you’re not on smart.

Pitfall 5: Moving home timing

If you’re moving, switching may not complete in time. Often the simplest route is to take readings on move-in day, then compare once the account is set up (you’ll initially be on a deemed tariff).

Pitfall 6: Assuming “no savings” means “don’t act”

Even if prices look similar, switching can still be worthwhile for stability (fixing), better customer service, or tariff features. Just avoid switching for small differences if there are fees or risks.

Is an energy specialist the same as an energy broker?

For home energy, you’ll more commonly see “comparison service” rather than broker. A specialist may help you compare tariffs and switch. Always check whether they cover whole-of-market or only a panel of suppliers, and what support they provide after you apply.

Can I switch supplier if I have a prepayment meter?

Often yes, but availability varies by supplier and meter setup. Some tariffs are limited for prepay. If you’re repaying debt through the meter, switching can be more complex and depends on your situation and supplier policies.

Do I need a smart meter to get the best tariff?

Not necessarily. Some of the more advanced tariffs (like time-of-use) can require a smart meter, but many fixed and variable tariffs do not. If you’re offered a smart-only deal, make sure you’re comfortable with how pricing changes by time period.

What details affect my quote the most?

Your postcode region (network charges), meter type (credit/prepay/smart), payment method (Direct Debit vs on receipt of bill), and your usage in kWh. Standing charges also vary by region, so the same supplier can be different prices across the UK.

Will switching interrupt my supply?

In normal circumstances, no — switching changes billing, not the physical supply. If there’s a metering issue or an account problem (e.g., incorrect address details), it can delay the switch, but you should still have energy.

What if my bill is wrong — should I switch first?

If you suspect a billing error, it’s usually best to raise it with your current supplier first (provide meter reads/photos). Switching doesn’t automatically fix a disputed balance and could complicate the timeline. If you’re stuck, independent advice can help you follow the right complaints route.

Are there any fees for using EnergyPlus to compare?

Energy comparison sites typically earn a commission from suppliers for successful switches. The right question is whether the service is transparent about coverage, how results are ranked, and any limitations. Your tariff price is set by the supplier’s offer and your eligibility.

I’m renting — can I still switch and what happens when I leave?

If you’re the bill payer, you can usually switch. When you leave, take meter readings on your move-out day, give them to the supplier, and close the account so the next occupier starts correctly. If your tenancy has a specific supplier clause (rare), follow the agreement.

Editorial trust signals

• Written by: EnergyPlus Editorial Team
• Reviewed by: Energy Specialist
• Last updated: February 2026

How we assess “best option” in this guide

We’ve written this page to help UK households choose the right kind of support (switching vs supplier resolution vs independent advice) and to understand the variables that typically change outcomes.

• Tariff comparisons: Focus on unit rate + standing charge + exit fees + eligibility (region, meter type, payment method).
• Assumptions in scenarios: Illustrative p/kWh and p/day figures, typical annual usage examples, and simple break-even maths. These are not live prices.
• What we don’t do here: We don’t predict market movements or guarantee savings. We also don’t provide legal advice on tenancy disputes or debt enforcement.
• Limitations: Supplier availability and tariff rules can change quickly; some offers may be time-limited, postcode-limited, or require certain meters.