Prepayment tariffs: how do they work?

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Some of us who struggle with direct debit tariffs may find prepayment tariffs much more transparent and easier to manage. But while these prepayment tariffs can have their advantages, they also have their caveats. Here, we’ll explain how prepayment tariffs work, go over their pros and cons, and answer some commonly asked questions about prepayment tariffs and prepayment meters.
Last updated: March 2021

Nobody wants to pay over the odds for their household energy. Yet, as a nation, we’re spending too much for our gas and electricity, no matter our payment methods. Far too much. In fact, between us, we’re spending over £800 million more for our energy than we should be, according to a 2020 report by the National Audit Office (NAO). There are a number of reasons for this. Many of us are on the wrong tariff or with the wrong energy supplier for our needs. But often, we pay too much for our energy usage because we’ve lost control of our energy use and spend. Prepayment tariffs can be a useful way to regain that control.

What is prepayment? How is it different from other tariffs?

For most energy consumers today, energy is paid for by a monthly direct debit. The exact figure that is taken out is calculated based on your average usage or spend. If meter readings are taken regularly, consumers can be sure of fair and accurate billing. The figure you pay every month may be lowered or increased if your usage changes significantly.
Prepayment Tariffs

However, if consumers fail to report their meter readings on a monthly basis, direct debits will be based on estimated usage.

And this can prove problematic.

Estimated usage can be based on the historic usage of similar properties in your area, and may not necessarily be based on your usage. This can give rise to all kinds of billing errors and inaccuracies. Look on virtually any energy supplier’s Trustpilot page and you’ll see a slew of angry reviews from customers who have received inaccurate bills and been financially inconvenienced as a result.

A prepayment meter eschews direct debits and the potential inaccuracies and unpleasant surprises that can come with them. Prepayment tariffs use a special prepayment meter which can be topped up whenever credit needs a boost. Making managing energy much like managing a mobile phone on a Pay As You Go tariff. Except that if you forget to top up your credit, you could find yourself in the cold and the dark as the meter will shut down your supply.

The good news is that there are lots of ways to top up your account on a prepayment tariff. You can top up while out and about at your local corner shop, newsagents, garage or anywhere else you see the Pay Point logo. You can see a map of Pay Point locations here. It is also possible to top up over the phone, online or via your supplier’s mobile app (if they have one).

Is prepayment cheaper?

Is a prepayment tariff cheaper than a direct debit tariff with a credit meter? It really depends on the tariff. If you have previously been on a “deemed contract” with your supplier after moving into a new home, or are on a standard or default tariff, you’re probably not getting the best rate, and switching to a prepayment tariff may well be cheaper.

For most, however, prepayment tariffs are actually more expensive.

Below there are two tables. The first contains 5 of the most reasonable prepayment tariffs based on national average energy costs and moderate consumption. Your own experience, of course, may vary depending on where you live and how much energy you typically use:

Supplier Name Tariff Name Price
Bulb Vari-Fair £1024
EDF Prepay Total Service May22 £1041
SSE Standard Pay As You Go £1065
E.ON E.On Energy Plan with Prepayment £1069
SSE Standard (Variable) Prepayment £1069

The second contains equivalent direct debit tariffs using a conventional credit meter.

Supplier Tariff Name Tariff Type Price
E.ON Fix Online Exclusive v51 Fixed for 12 months £875
Green Network Energy GNE Summer Sizzler V9 Fixed for 12 months £876
Avro Energy Simple and USelect12M Fixed for 12 months £883
OVO Energy Better Smart Fixed for 12 months £889
Shell Energy Energy January 2022 v3 Fixed until 31 Jan 2022 £890

As we can see, even the cheapest of the 5 tariffs on the top table doesn’t quite compare to the most expensive direct debit tariff.

Why are prepayment tariffs more expensive?

The simple truth is that energy suppliers benefit more when customers take out direct debit. It ensures that they’ll get a regular and predictable payment from every customer. And if that customer is paying too much, they can always be credited back. Some suppliers even let their customers earn interest on their credit.

Prepayment tariffs, on the other hand, are a riskier prospect for energy suppliers. Because they don’t know how much money they’ll get from each customer per month, it can be harder for them to make accurate cash flow projections.

That said, prepayment tariffs are safer for energy suppliers (and consumers) in other ways. For instance, they have a usage cap, so customers are unable to run up big bills that they can’t afford to pay.

Prepayment energy suppliers

Pros and Cons of prepayment tariffs

Prepayment Tariff Pros Prepayment Tariff Cons
Meters have a usage cap, so there are usually no unpleasant surprises. Most will pay more per kWh.
Billing errors and inaccuracies are less likely. Fewer tariff options.
Some may find topping up easier than sending monthly meter readings. Many prepayment tariffs are close to the prepayment energy price cap.
You only ever pay for what you use. Some (such as older customers) may not find it easy or convenient to keep topping up.
It can be easier to budget and help you feel in control. Running out of credit means a loss of service.

How to switch to prepayment: What you need to know

Switching to a prepayment tariff is relatively simple. All you need to do is either reach out to your current supplier and see what prepayment tariffs they offer. However, you should also check the market to see if an alternative supplier has a prepayment tariff that would be more cost advantageous to you. Your supplier (or new supplier) will arrange for a prepayment meter to be installed. You will also receive a key or card in the post that enables you to top up your meter. Most suppliers will not charge you for the meter installation. However, it’s always recommended that you check before committing to a new supplier.

Before switching to a prepayment meter, we recommend double checking that:

  • Your meter is accessible to you 24 hours a day.
  • Your meter is not above head height.
  • There are no issues that might prevent you from topping up.

Remember, failing to top up could leave you in the cold and the dark. A scary prospect in the winter months.

Can my supplier force me to switch to prepayment?

Technically, your supplier may be able to install a prepayment meter on your property whether you want one or not. However, this is a relatively rare occurrence as Ofgem typically frowns upon this practice with forced installations banned for vulnerable energy consumers. Suppliers only do this when customers are in considerable debt and need a helping hand in managing their energy usage and costs.


More than ever, our team of experts remain on deck to help you make savings on your energy. We understand how deeply the lives of many are affected by these trying times and we want to support you the best we can. More on your energy supply during COVID-19 in our article.

If your supplier intends to install a prepayment meter against your will, you may find this information from the Citizens Advice Bureau useful.

Which suppliers have prepayment tariffs?

There are many prepayment providers. All of the “Big 6” energy suppliers have at least one prepayment tariff. So if you’re one of the 70% of UK energy consumers that is serviced by one of these suppliers, you can switch to a prepayment tariff easily and without additional cost. The “Big 6” are:

However, these larger suppliers are by no means the only ones that offer prepayment tariffs. Indeed, there are suppliers like Boost Energy that deal exclusively in prepayment tariffs. You’ll also find that many smaller and / or green energy suppliers also offer prepayment tariffs including:

And many, many more.

Looking for the best prepayment tariffs? We’re here to help!

While prepayment tariffs are generally a little more expensive in terms of kWh charges, that doesn’t mean you can’t make great savings while also making your account easier to manage. We can scour the market on your behalf to find the best value prepayment tariffs for your needs.

What’s more, we’ll even manage your switch from end-to-end to ensure that there are no headaches and no unpleasant surprises. Just cheaper, more manageable energy.

Want to know more?

Contact us today on 0330 054 0017.

We’re available from 9am to 7pm.

Call us to switch your energy supplier for free!

0330 054 0017



Do I need to change my meter to start on a prepayment tariff?

Yes. Your supplier will need to install a new prepayment meter. However, most suppliers (including all of the "Big 6") will not charge you for this.

How do you top up on a prepayment tariff?

There are lots of ways in which you can top up on a prepayment tariff. You can take your meter card or key into any store that has the Pay Point logo. Alternatively, you can top up online, over the phone or via your suppliers’ smartphone app if they have one.

Is a credit meter cheaper than prepayment?

Generally, a direct debit tariff with a credit meter is cheaper than a prepayment tariff in terms of kWh. However, many energy consumers with credit meters experience billing inaccuracies because their direct debits are based on estimated usage rather than accurate usage. As such, you may find that you save money with a prepayment tariff.

Can I change from a prepayment tariff to a direct debit?

If you decide that your prepayment tariff isn’t working out for you, you can always switch back to a direct debit tariff with a credit meter. However, some suppliers may charge you for this.


Written by eleanor

Updated on 31 Mar, 2021


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