Prepayment Meters: Disadvantages, Rights and How to Switch to Credit

Around 4.5 million UK households have a prepayment energy meter, paying for gas or electricity before they use it rather than receiving a bill afterwards. While prepayment meters can help some people budget, the prepayment meter disadvantages in the UK are significant — higher costs, the risk of self-disconnection, and limited tariff choice being just the beginning. This guide explains the full picture, covers your rights under current Ofgem regulations, and shows you how to switch to a cheaper credit meter.

What are the disadvantages of a prepayment meter?

• Higher unit rates – prepayment tariffs are often 5–10% more expensive than equivalent direct debit rates.
• Risk of self-disconnection – if your credit runs out, your supply cuts off, leaving you without heating or power.
• Fewer tariff choices – many of the cheapest fixed deals and green tariffs are only available to credit meter customers.
• Inconvenience – older key or card meters require regular trips to a top-up point, though smart prepayment meters can be topped up online.
• Standing charges still apply – you pay the daily standing charge even on days you use no energy.
• Debt recovery – suppliers can set meters to recoup debt from each top-up, reducing the energy you receive.

You have the right to switch from a prepayment meter to a credit meter free of charge, provided you have no outstanding debt (or the debt is below £500, depending on the supplier). If you have a smart meter, your supplier can often switch the mode remotely within 24 hours without replacing the meter. Contact your supplier directly or use a comparison site to find the best credit tariff for your usage.

How Prepayment Meters Work

A prepayment meter requires you to add credit before you can use energy. There are three main types:

• Traditional key/card meters — you top up a key (gas) or card (electricity) at a PayPoint, Post Office, or Payzone outlet, then insert it into the meter to load the credit.
• Token meters — older style using coins or tokens. Very few remain in service.
• Smart prepayment meters (SMETS2) — modern smart meters operating in prepayment mode. You top up online, via an app, or by text message, and the credit is applied remotely within minutes.

When your credit runs out, the meter stops supplying energy. Most meters include a small emergency credit allowance (typically GBP 5-15) and a “friendly hours” feature that prevents disconnection overnight or on public holidays. But these are temporary measures, not solutions.

Prepayment Meter Disadvantages: The Full List

1. Higher unit rates and standing charges

Historically, prepayment customers paid more per unit of energy than credit customers. The Ofgem price cap now applies equally to prepayment and credit tariffs, eliminating the worst of the price premium. However, prepayment customers still face disadvantages:

• They cannot access the cheapest fixed-rate deals, which are only available to credit meter customers
• Time-of-use tariffs (such as Octopus Go or Agile) that offer off-peak rates as low as 12p/kWh are largely unavailable on prepayment meters
• The inability to spread costs over quarterly or monthly bills can make budgeting harder during high-use winter months

The result is that a prepayment household typically pays GBP 50-150 more per year than a credit meter household with the same usage, simply because of reduced tariff choice.

2. Risk of self-disconnection

Self-disconnection is the term for when a prepayment customer runs out of credit and loses their energy supply. It is the single most serious disadvantage of prepayment meters. National Energy Action estimates that 3.2 million prepayment customers self-disconnect at least once a year.

Self-disconnection means:

• No heating in winter, posing health risks especially for elderly, disabled, or young household members
• No hot water for washing or cooking
• No lighting
• Loss of refrigerated and frozen food
• Inability to charge phones or access the internet

The consequences fall disproportionately on the most vulnerable households — the same people who are most likely to be on prepayment meters in the first place.

3. Debt recovery through the meter

If you owe money to your energy supplier, a prepayment meter automatically deducts a portion of each top-up to repay the debt. This is typically set at a rate of GBP 0.50-2.00 per day in addition to any standing charge and energy consumption. On a GBP 10 top-up, you might find that GBP 2-4 goes straight to debt repayment, leaving less for actual energy use.

While debt recovery rates are supposed to be set at an affordable level, many customers find they cannot top up enough to cover debt, standing charges, and usage, leading to a cycle of self-disconnection.

4. Inconvenience of topping up

Traditional prepayment meters require physical top-ups at a shop or outlet. If you run out of credit at 11pm on a Sunday, you may have no way to restore supply until a shop opens. Smart prepayment meters have largely solved this issue with remote top-up via apps, but not all households have been upgraded to smart meters yet.

5. Limited supplier choice

Not all energy suppliers offer prepayment tariffs, and those that do typically offer fewer options. This limits your ability to switch to the cheapest deal. The smart meter rollout is gradually improving this, as SMETS2 smart meters can be switched between prepayment and credit mode remotely, but the process is not always smooth.

6. Impact on energy efficiency investments

Prepayment customers are less likely to invest in energy efficiency improvements because they tend to be on lower incomes and because the fragmented nature of their energy spending makes it harder to see the return on investment. Ironically, these are often the households that would benefit most from better insulation, a more efficient boiler, or even solar panels.

Ofgem’s Rules on Forced Installation of Prepayment Meters

In 2023, a major scandal erupted when it was revealed that energy suppliers were forcibly installing prepayment meters in the homes of vulnerable customers who had fallen into debt — including elderly and disabled people. Ofgem responded by introducing strict new rules:

• Forced installations are banned for households that include anyone over 75, disabled or chronically ill, or dependent on powered medical equipment
• Suppliers must carry out a vulnerability assessment before any forced installation
• Warrant-based forced installations require court approval, with the supplier demonstrating that all reasonable alternatives have been exhausted
• Suppliers must attempt to contact the customer at least 10 times through multiple channels before applying for a warrant
• Smart meters cannot be remotely switched to prepayment mode without customer consent in most circumstances

These rules have significantly reduced forced installations, but they have not eliminated the problem entirely. If you are being threatened with a prepayment meter and believe you are vulnerable, contact your supplier’s vulnerability team, Citizens Advice (0808 223 1133), or the Energy Ombudsman.

Your Rights as a Prepayment Meter Customer

You have several important rights under Ofgem’s licence conditions:

• Right to switch to a credit meter. You can request a switch to a credit meter at any time. Your supplier cannot unreasonably refuse, though they may require you to clear any outstanding debt or pass a credit check first.
• Right to emergency credit. Your meter must provide emergency credit to prevent disconnection, particularly outside normal shopping hours.
• Right to affordable debt repayment. If debt is being recovered through your meter, you can ask for the repayment rate to be reduced if it is causing hardship. Suppliers must take your ability to pay into account.
• Right to a smart meter. You can request a smart meter upgrade from your supplier at no cost. A SMETS2 smart meter in prepayment mode offers remote top-up, usage monitoring, and the ability to switch to credit mode more easily.
• Right to switch suppliers. You can switch energy suppliers even if you have a prepayment meter, though options are more limited.
• Right to the Warm Home Discount. Eligible prepayment customers receive the GBP 150 Warm Home Discount as an automatic credit to their account.

How to Switch from a Prepayment Meter to Credit

Switching from prepayment to credit is usually straightforward, but the process depends on your circumstances:

If you have no outstanding debt

Contact your supplier and request a switch to a credit meter. If you have a SMETS2 smart meter, the switch can often be done remotely within 24-48 hours — no engineer visit needed. For older meters, an engineer will need to visit to replace or reconfigure the meter, which may take 1-4 weeks to arrange. There should be no charge for the switch.

If you have outstanding debt

Suppliers may require you to repay the debt (or agree a repayment plan) before switching to credit. The debt threshold above which a supplier can refuse the switch varies, but Ofgem expects suppliers to be reasonable. Options include:

• Agreeing a repayment plan that adds a fixed monthly amount to your credit meter bill
• Repaying the debt in full if you are able to
• Requesting a reduction in the debt if you believe it has been calculated incorrectly (for example, based on estimated rather than actual readings)

If your supplier refuses to switch you and you believe the refusal is unreasonable, complain through their formal complaints process and then escalate to the Energy Ombudsman if necessary.

If the prepayment meter was installed by a previous tenant

If you have moved into a property with a prepayment meter and have no debt with the supplier, you have an immediate right to switch to a credit meter. Contact the supplier, register as the new occupant, and request the switch. You should not be asked to pay any debt accumulated by the previous tenant.

Saving Money on a Prepayment Meter

If you cannot switch to a credit meter immediately, there are still steps you can take to reduce your energy costs:

• Request a smart meter. Smart prepayment meters allow remote top-up, better usage tracking, and easier switching in the future.
• Check you are on the cheapest prepayment tariff. Use a comparison site that includes prepayment options.
• Reduce your energy use. Improving your home’s insulation, draught-proofing windows and doors, and switching to LED lighting can cut consumption without any change to your meter type.
• Apply for the Warm Home Discount. If eligible, you receive GBP 150 automatically credited to your account.
• Check eligibility for ECO4. The Energy Company Obligation scheme can fund insulation and heating improvements for eligible households, regardless of meter type.
• Use emergency credit wisely. Know how much emergency credit your meter provides and save it for genuine emergencies rather than relying on it routinely.

For longer-term savings, investing in energy efficiency improvements delivers the biggest reduction in bills. Even modest measures like loft insulation and draught-proofing can save GBP 100-250 per year. You can get a free quote for improvements to your property.

The Future of Prepayment Meters in the UK

The smart meter rollout is gradually transforming the prepayment landscape. As SMETS2 meters become universal, the distinction between prepayment and credit meters becomes a software setting rather than a hardware difference. This has several implications:

• Switching between prepay and credit becomes instant and free
• More tariff options become available to prepayment customers
• Real-time usage data helps customers manage their consumption
• Remote top-up eliminates the inconvenience of physical top-ups

However, the fundamental issue remains: prepayment meters exist primarily because customers have debt or are deemed a credit risk. Until the root causes of energy debt — high prices, low incomes, and inefficient housing — are addressed, the disadvantages of prepayment will persist.

Frequently Asked Questions

Can my energy supplier force me onto a prepayment meter?

Only in limited circumstances. If you have an outstanding energy debt and have not engaged with the supplier to agree a repayment plan, they can apply to a court for a warrant to install a prepayment meter or switch a smart meter to prepayment mode. However, Ofgem’s rules prohibit forced installation for vulnerable customers, and suppliers must exhaust all other options first. If you are being threatened with a prepayment meter, contact Citizens Advice immediately.

Will switching to a credit meter affect my credit score?

Having a prepayment meter does not directly appear on your credit file. However, energy debt that leads to a prepayment meter installation may be recorded. Switching to a credit meter and maintaining regular payments can demonstrate financial responsibility, but the switch itself does not have a direct positive or negative impact on your credit score.

What happens to my energy supply if I cannot afford to top up?

When your standard credit runs out, the meter switches to emergency credit (if available). Once emergency credit is used, the supply stops. If you are struggling to afford energy, contact your supplier immediately — they are required to offer support, which may include extending emergency credit, reducing debt repayment rates, applying the Warm Home Discount, or connecting you with local hardship funds. You can also contact the Energy Saving Trust for advice on reducing your bills through efficiency improvements.

Can I get solar panels with a prepayment meter?

Yes. Solar panels can be installed regardless of your meter type. They reduce the amount of electricity you draw from the grid, which means less money spent on top-ups. However, receiving payment for electricity you export to the grid (the Smart Export Guarantee) may be more complex with some prepayment meter setups. A SMETS2 smart meter in prepayment mode can typically handle export payments, but check with your supplier and installer before proceeding.