Quick answer

A prepayment electricity meter charges you for electricity before you use it. You add credit to a key, card or token, and the meter deducts that credit as electricity is consumed. If the balance reaches zero, the supply normally stops unless emergency credit is available.

Prepayment meters can make budgeting easier, but they require regular top-ups, daily standing charges continue to apply, and unit rates have historically been higher than comparable credit-meter tariffs. In Northern Ireland, many customers still top up through PayPoint or Payzone outlets because smart prepayment options are less widely available.

At a glance

Feature	Prepayment meter	What to expect
Payment	Before electricity is used	Top up by key, card, token or online where available
Budget control	High	You can only use the credit available
Supply	Stops when credit runs out	Emergency credit may provide a short buffer
Charges	Unit rate plus daily standing charge	Standing charges continue even when usage is low
Switching	Usually possible	Debt limits and supplier support may affect eligibility

What is a prepayment electricity meter?

A prepayment electricity meter, sometimes called a pay-as-you-go meter, requires you to pay for electricity before using it. You add credit to a key, card or token, insert or apply it to the meter, and the balance reduces as electricity is consumed.

Prepayment meters are used for several reasons. Some households choose them for tighter budget control, while others inherit them in rented properties or use them as part of a supplier debt-repayment arrangement.

Key takeaway

A prepayment meter lets you pay as you go instead of receiving a bill after using electricity.

How does a prepayment electricity meter work?

You purchase credit through a PayPoint or Payzone outlet, or online if your supplier offers that option. The credit is loaded onto your key, card or account and transferred to the meter.

The meter deducts credit as electricity is used. When the available balance reaches zero, the electricity supply normally stops. Most meters provide a small emergency credit reserve to give you time to top up.

Any emergency credit used is normally repaid automatically from your next top-up before the remaining amount is added to your available balance.

Key takeaway

The meter counts down your prepaid balance and may disconnect the supply when no credit remains.

How do you top up a prepayment meter?

Top-up points are commonly available at convenience stores, supermarkets, post offices and other PayPoint or Payzone locations. Some suppliers also allow customers to top up through an app or website.

Minimum top-up amounts vary by supplier and may start from around £1 to £5. After purchasing credit, follow your supplier’s instructions to transfer it to the meter.

Key takeaway

You can usually top up in person, while some suppliers also support online or app-based payments.

What charges apply to a prepayment meter?

Prepayment customers pay for the electricity they use and usually pay a daily standing charge. The standing charge is deducted automatically from the meter balance, even when little or no electricity is being used.

If the meter is being used to recover an existing energy debt, part of each top-up may also be deducted before the remaining credit is made available for electricity usage.

Key takeaway

Your top-up may cover electricity use, standing charges and, where applicable, debt repayments.

Why do people have prepayment meters?

There are several reasons why a household may use a prepayment meter:

Budget control: paying in advance can make it easier to limit energy spending.

Debt management: a supplier may use the meter to recover arrears gradually.

Landlord or previous-tenant installation: rented homes may already have one fitted.

Personal preference: some customers prefer pay-as-you-go payments to monthly or quarterly bills.

Key takeaway

Prepayment meters may be chosen for budgeting or inherited through a property or supplier arrangement.

Are prepayment electricity meters more expensive?

Prepayment tariffs have historically had higher unit rates than comparable direct-debit or standard credit tariffs. Regulatory pressure has narrowed this difference in some markets, but customers should still compare current rates rather than assume the costs are the same.

Other practical costs and disadvantages can include:

losing power if credit runs out before you can top up

starting a new top-up with less available credit after using emergency credit

continuing to pay standing charges when the property is empty or usage is low

the time and travel involved in visiting a top-up outlet where online payments are unavailable

Key takeaway

Compare both the tariff and the practical cost of topping up before deciding whether prepayment offers good value.

How do prepayment meters compare with credit meters?

Feature	Prepayment meter	Credit meter
Payment timing	Before use	After use, usually monthly or quarterly
Budget control	High	Requires ongoing monitoring
Risk of unpaid bills	Lower because usage is prepaid	Higher if bills are not paid
Unit rates	Often higher historically	Often lower, particularly by direct debit
Convenience	Requires regular top-ups	Usually one regular payment
Loss of supply	Automatic when credit runs out	Requires a formal disconnection process

Neither option is universally better. The right choice depends on the tariff, your household circumstances and how you prefer to manage payments.

Key takeaway

Prepayment offers stronger spending control, while credit meters are generally more convenient and may provide lower rates.

How do smart meters change prepayment?

Smart prepayment meters can allow customers to top up online and monitor usage through an app without using a physical key or card. This can reduce the risk of running out of credit because a top-up outlet is closed or inaccessible.

Smart-meter availability varies by region. Northern Ireland has progressed more slowly than Great Britain, so many customers still use traditional keys, cards and physical top-up locations.

Key takeaway

Smart prepayment can make topping up easier, but availability depends on your supplier and location.

Can you switch electricity suppliers with a prepayment meter?

Yes, in most cases. Prepayment customers can usually switch suppliers, although outstanding debt and the new supplier’s meter or tariff requirements may affect eligibility.

Your new supplier may send a replacement key or card programmed for its system. Any unused credit with the previous supplier should normally be refunded, although the process and timing vary.

Key takeaway

Prepayment customers can usually switch, but should check debt limits, tariff availability and how remaining credit will be handled.

What should you expect when using a prepayment meter?

Day-to-day use normally involves a few regular tasks:

Top up regularly: how often depends on household usage and the season.

Check the balance: most meters display remaining credit and emergency-credit use.

Plan ahead: setting a reminder can reduce the risk of losing supply.

Use emergency credit carefully: it is deducted from the next top-up.

Allow for standing charges: they continue to reduce the balance even when usage is low.

Key takeaway

Regular balance checks and planned top-ups make prepayment meters easier to manage.

Should you switch from a prepayment meter?

A different payment arrangement may suit you if you want fewer top-ups, access to different tariffs or a regular monthly payment. Before changing, compare unit rates, standing charges, payment terms and any meter-exchange fees.

Share Energy offers a standard unit rate with no long-term contracts and gives customers an opportunity to share in the company’s annual profits. More information is available at share-energy.com.

Key takeaway

Compare the full cost and convenience of available tariffs before deciding whether to keep or replace a prepayment meter.

Frequently asked questions

What happens when a prepayment meter runs out of credit?

Short answer: The electricity supply normally stops.

Most meters provide a small emergency credit reserve that can delay disconnection and give you time to top up. Any emergency credit used is usually repaid from the next top-up.

Can I switch from a prepayment meter to a credit meter?

Short answer: Yes, in many cases.

You can ask your supplier about changing the meter or tariff. A credit check, account review or meter-exchange charge may apply.

Are prepayment meters more expensive than credit meters?

Short answer: They have often been more expensive historically.

Prepayment tariffs have commonly carried higher unit rates than comparable credit-meter tariffs. The gap has narrowed in some markets, but customers should compare current rates and standing charges.

How do I top up a prepayment meter in Northern Ireland?

Short answer: Use a PayPoint or Payzone outlet, or an online service where available.

Top-up locations include many convenience stores, supermarkets and post offices. Some suppliers also support top-ups through an app or website.

What is emergency credit on a prepayment meter?

Short answer: It is a small reserve used when your balance reaches zero.

Emergency credit helps prevent an immediate loss of supply. It is normally repaid automatically from your next top-up before new credit becomes available.

Can I have a prepayment meter if I rent my home?

Short answer: Yes.

Many rented properties already have prepayment meters. Tenants can generally switch suppliers, subject to debt rules, tariff availability and any relevant tenancy conditions.

Do prepayment meters record electricity use?

Short answer: Yes.

Prepayment meters record consumption in kilowatt-hours. The display may also show your available balance, emergency credit and recent usage information.

Key points

·       A prepayment meter requires you to buy electricity credit before using it.

·       Credit can usually be purchased through a key, card, token, app or website, depending on the supplier.

·       The supply normally stops when credit runs out, although emergency credit may provide a temporary buffer.

·       Daily standing charges continue to apply even when electricity use is low.

·       Prepayment tariffs have historically been more expensive than many credit-meter tariffs.

·       Customers can usually switch suppliers or request a credit meter, subject to eligibility and account conditions.

·       Regular balance checks and planned top-ups reduce the risk of an unexpected loss of supply.