How Does Prepaid (Pay As You Go) Electricity Work?

Prepaid electricity — also called pay as you go (PAYG) electricity — lets you pay for your power before you use it, instead of receiving a monthly or bimonthly bill. You top up a prepayment meter with credit, and usage is deducted from that balance in real time. This model is often favoured by renters, those with variable income, or anyone who wants to actively monitor and reduce their energy consumption.

The total cost of your PAYG electricity is made up of several components:

  • Unit Rate (c/kWh): The price you pay for each unit of electricity you consume. This is the most significant factor in your overall cost.
  • Standing Charge: A fixed daily or annual charge that covers the costs of providing a supply to your home.
  • Prepayment Service Charge: A daily charge specific to PAYG customers that covers the cost of maintaining the prepayment system and meter. This charge is unique to this type of plan and is a key reason PAYG can be more expensive than bill-pay.
  • Government Levies: The PSO levy is a government-mandated levy that all electricity customers must pay to support renewable energy.
When searching for the cheapest prepaid electricity, it's important to compare all these charges, not just the unit rate. A provider with a low unit rate might have a high standing or service charge, which could negate any potential savings.

For more detail on how the prepayment meter itself works day to day — including top-up methods and what happens during a power cut — see our full guide to pay-as-you-go electricity meters.

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Who Has the Cheapest Prepaid Electricity?

PrepayPower is currently the cheapest prepaid electricity supplier in Ireland, with Pinergy a close second and Electric Ireland's Smarter Pay As You Go plan the most expensive of the three. The table below compares every prepaid and pay as you go electricity plan available, ranked by estimated annual cost.

Who Has the Cheapest Prepaid Electricity comparison table
Supplier Best Offer Price per Year
Pinergy Standard, 24hr €2,392.00
PrepayPower Standard, 24hr €2,556.00

Illustrative figures for August 2026, based on average consumption for an urban home with a prepaid meter. All discounts and cashback have been applied.

Is Prepaid Electricity Cheaper Than Metered Electricity?

In general, prepaid electricity is more expensive than a traditional metered (bill-pay) plan, especially one paid by Direct Debit. This is due to a Prepayment Service Charge that is added on top of the usual unit rate and standing charge, and to fewer discretionary discounts being offered on prepaid tariffs.

Traditional Metered (Bill-Pay)

Unit Rate
Often includes significant discounts for new customers or Direct Debit.
Standing Charge
A fixed daily or annual charge.
Additional Charges
No extra charges beyond unit rate, standing charge, and PSO Levy.
Payment Method
Monthly or bi-monthly bills, often by Direct Debit.
Budgeting Control
Less direct control; bills are a total sum of past usage.

Prepaid (Pay-As-You-Go)

Unit Rate
Typically higher and less likely to offer large discounts.
Standing Charge
A fixed daily or annual charge, sometimes slightly higher.
Additional Charges
Includes a specific "Prepayment Service Charge" adding over €100 annually.
Payment Method
Top-up as you go, online, via app, or at a physical outlet.
Budgeting Control
Complete control; you see credit being deducted in real time.

Which Suppliers Offer Prepaid Electricity?

Three suppliers offer a dedicated prepaid or pay-as-you-go electricity meter in Ireland: PrepayPower, Pinergy, and Electric Ireland. Bord Gáis Energy also offers a PAYG option on request. Each has a different balance of price, technology, and customer support — outlined below.

PrepayPower

PrepayPower is one of the most established and dedicated prepaid electricity providers in the country, with around 180,000 customers. It offers a straightforward pay-as-you-go model that lets customers top up credit through its app, online, or at Payzone outlets, with account balances updating every 30 minutes. A major selling point is the mobile app and in-home display, which give real-time energy usage and spending views. PrepayPower is also the only prepaid supplier offering both electricity and gas on a PAYG meter.

Pinergy

Pinergy is a dedicated prepaid electricity provider with a strong emphasis on smart energy and sustainability, serving around 27,000 customers. It is known for supplying 100% renewable electricity and focusing on technology that helps customers actively reduce their consumption. For environmentally conscious customers, Pinergy is the cheapest green prepaid option, though its emergency credit allowance (€10) is lower than PrepayPower's or Electric Ireland's (€20 each).

Electric Ireland

Electric Ireland is a major player in the Irish energy market that also offers a prepaid electricity option for customers with a smart meter, branded "Smarter Pay As You Go". The plan is designed to offer the convenience of PAYG with the backing of a large, established supplier, though it is currently the most expensive of the three dedicated prepaid options.

Bord Gais Energy

Bord Gáis Energy also offers a pay-as-you-go option, catering to both traditional and smart meter customers. It is not a dedicated prepaid specialist like the three suppliers above, but the flexibility of being with a large, full-service supplier — offering gas, dual fuel, and boiler services alongside prepaid electricity — can be a benefit for some customers.

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What Happens If My Prepaid Electricity Runs Out of Credit?

All three suppliers offer an emergency credit feature so you are never left without power. When your credit runs low, your meter will alert you with a warning sound. You can then activate a small amount of emergency credit (typically €10 - €20, depending on supplier) to give you time to top up. This emergency credit is deducted from your next top-up.

Suppliers are legally required to provide a 'safe period' during which they cannot disconnect your supply. This typically includes:

  • Weekends
  • Public holidays
  • Specific hours on weekdays (e.g., after 4 pm)

How Do I Switch to a Prepaid Electricity Provider?

  1. Choose Your Provider: Compare their rates (unit rate, standing charge, and any prepayment service fees).
  2. Gather Your Information: You'll need your Meter Point Reference Number (MPRN), contact details, current address and Eircode.
  3. Initiate the Switch: Contact your chosen new provider online, by phone, or via a sign-up form.
  4. The Provider Handles the Rest: Your new provider will contact your current supplier and ESB Networks to manage the switch.
  5. Installation and Activation: A technician will install the new meter and activate the new provider's system.
  6. Final Bill and Refund: Your old provider will send a final bill and refund any remaining credit.

Who Should Use Prepaid Electricity?

It's a great option for:

  • Individuals who need strict control over their budget and want to avoid unexpected bills
  • Households who want to actively monitor and reduce their energy consumption
  • Renters or those who move frequently
  • Anyone with a poor or no credit history

It may not be the best option for:

  • Households primarily focused on getting the lowest possible annual cost
  • Those who prefer the convenience of monthly Direct Debit

Frequently Asked Questions About Prepaid Electricity

Prepaid electricity — also called pay as you go (PAYG) electricity or prepaid power — is a way of paying for power in advance, using a meter that you top up with credit before you consume any energy. It gives customers direct control over their spending, but usually costs more overall than a standard metered plan because of an extra Prepayment Service Charge, so it is best treated as a last resort rather than a first choice.

As of August 2026, the cheapest prepaid (pay as you go) electricity in Ireland is PrepayPower, with an estimated annual bill of €1,853.06 including VAT (based on average annual consumption). However, customers should always compare the full breakdown of charges.

In almost all cases, prepaid (pay-as-you-go) electricity is more expensive than a traditional metered (bill-pay) electricity plan. This is primarily due to the Prepayment Service Charge, a fixed daily fee added to cover the cost of the meter and the PAYG service infrastructure.

All providers offer an emergency credit feature (typically €10-€20, depending on supplier) that can be activated when your main credit runs low. Suppliers are legally required to provide a 'safe period' during which they cannot disconnect your supply, including weekends, public holidays, and specific late hours on weekdays.

Not exactly. A prepaid electricity meter is a specific type of smart meter that requires you to top up credit in advance. Not every smart meter is a prepaid meter — many smart meters are used with standard bill-pay plans instead, with no prepayment required.

Further Reading