Your Electricity Bill Explained: Line by Line Guide
Confused by your electricity bill? Our line-by-line guide explains every charge including standing charges, PSO levy, and unit rates.
By SmartSaver Team | Published 1 January 2026 | 7 min read
Topics: electricity bill explained ireland, understand electricity bill, electricity charges ireland, reading electricity bill
Irish electricity bills can be confusing. Between standing charges, unit rates, PSO levies, and VAT, it's hard to know exactly what you're paying for. This guide breaks down every line of your bill so you understand exactly where your money goes.
The Basic Structure of Your Bill
Every Irish electricity bill contains the same core elements, regardless of which supplier you're with:
Let's examine each section in detail.
Account and Supply Information
At the top of your bill, you'll find:
MPRN (Meter Point Reference Number): This 11-digit number uniquely identifies your electricity connection. You'll need it when switching suppliers or reporting issues. It's different from your account number with your supplier. Account number: Your supplier's reference for your account. This is specific to your relationship with that supplier and will change if you switch. Billing period: The dates covered by this bill, typically around 61 days (bi-monthly billing) though some suppliers offer monthly billing.Meter Readings
Your bill shows two readings:
Previous reading: The meter reading at the start of the billing period Current reading: The meter reading at the end of the billing period Units used: The difference between these readings, measured in kilowatt-hours (kWh)If you see an "E" next to a reading, it's an estimate. Estimated readings occur when your meter couldn't be read—either because nobody was home or your smart meter had connectivity issues.
Day and Night Readings
If you have a day/night meter, you'll see separate readings:
| Register | Typical Hours | What It Measures | |----------|---------------|------------------| | Day | 8am - 11pm | Daytime usage at standard rate | | Night | 11pm - 8am | Nighttime usage at cheaper rate |
Smart meter customers may also see a "Peak" register covering the 5pm-7pm period.
Unit Charges (Energy Costs)
This is the main variable portion of your bill—what you pay for the electricity you actually use.
Unit rate: Expressed as cents per kilowatt-hour (c/kWh). As of January 2026, typical rates range from 28-35c/kWh for standard 24-hour tariffs. Calculation: Units used × Unit rate = Energy costFor example: 1,200 kWh × €0.32 = €384.00
Time-of-Use Rates
If you're on a smart meter tariff, you'll see multiple unit rates:
| Rate Type | Typical Price | Your Usage × Rate | |-----------|---------------|-------------------| | Night (11pm-8am) | 18-22c/kWh | 300 kWh × €0.20 = €60 | | Day (8am-5pm, 7pm-11pm) | 30-35c/kWh | 700 kWh × €0.32 = €224 | | Peak (5pm-7pm) | 38-45c/kWh | 200 kWh × €0.42 = €84 |
The bill will show each rate separately with the corresponding usage.
Standing Charge
The standing charge is a fixed daily fee that covers:
- Maintenance of the electricity network
- Meter reading and billing costs
- Connection to the grid
For example: 61 days × €0.60 = €36.60
The standing charge applies whether you use any electricity or not. Even an empty property accrues standing charges.
Urban vs Rural Standing Charges
Rural customers pay higher standing charges than urban customers. This reflects the additional cost of maintaining electricity infrastructure in less densely populated areas.
The difference is typically €20-€40 per year. Your bill should indicate whether you're on an urban or rural tariff.
PSO Levy
The PSO (Public Service Obligation) levy is a government-mandated charge that funds renewable energy in Ireland.
Current rate (2025/26): €1.59 per month including VAT, or €19.10 per year How it works: Every residential customer pays the same PSO levy, regardless of usage. It appears as a separate line item on your bill.The PSO levy fluctuates annually based on wholesale electricity prices and renewable energy support requirements. When wholesale prices are high, less subsidy is needed, so the levy falls. When prices drop, the levy increases.
For a detailed explanation, see our PSO Levy Guide.
VAT (Value Added Tax)
Electricity is subject to VAT at a reduced rate of 9% (down from 13.5% previously, as a temporary measure extended through 2025).
VAT applies to:
- Unit charges
- Standing charges
- PSO levy
Your bill may show subtotals before and after VAT, or simply include VAT in all figures.
Reading a Sample Bill
Here's how these elements combine on a typical bill:
``` BILLING PERIOD: 01 Nov 2025 - 31 Dec 2025 (61 days)
METER READINGS Previous: 45,230 Current: 46,630 Units: 1,400 kWh
CHARGES (excluding VAT) Electricity units: 1,400 kWh × 29.36c €411.04 Standing charge: 61 days × 55.89c €34.09 PSO Levy €1.46 ------- Subtotal €446.59 VAT @ 9% €40.19 ------- TOTAL DUE €486.78 ```
Understanding Estimated vs Actual Bills
If your meter couldn't be read, your bill is based on an estimate. Look for:
- "E" next to meter readings
- "Estimated" label on the bill
- Usage that seems unusually high or low
Estimated bills are reconciled when an actual reading is obtained. If you've been over-estimated, you'll receive a credit. If under-estimated, you'll owe the difference.
To avoid estimation:
- Submit meter readings online or by phone
- Ensure access to your meter for readers
- Upgrade to a smart meter for automatic readings
Discounts and Credits
Your bill may show various adjustments:
Introductory discounts: New customer offers, typically 20-40% off unit rates for the first year Cashback credits: Welcome bonuses applied to your account Direct debit discount: Some suppliers offer 1-2% off for paying by direct debit Online billing discount: Small savings for paperless billing Loyalty discounts: Rare, but some suppliers offer retention dealsAlways check when discounts expire. After promotional periods end, you'll revert to standard rates—often 30-50% higher.
Common Billing Issues
Bill Higher Than Expected?
Check for:
- End of promotional discount period
- Estimated readings catching up with actual usage
- Seasonal variation (winter heating, summer air conditioning)
- Rate increases from your supplier
- Additional occupants or new appliances
Bill Lower Than Expected?
This could indicate:
- Under-estimation that will catch up later
- Improved efficiency
- Reduced occupancy
- Meter fault (rare but possible)
Suspected Meter Fault
If you believe your meter is faulty, contact ESB Networks (not your supplier). They will test the meter. If a fault is found, the test is free and your bills will be adjusted. If no fault is found, you may be charged for the test.
What Your Bill Doesn't Show
Your electricity bill doesn't itemise:
Network charges: These are included in your unit rate and standing charge. They cover transmission and distribution costs paid to ESB Networks and EirGrid. Capacity charges: Built into your rates, these fund the cost of ensuring sufficient generation capacity. Carbon costs: Generators pay carbon taxes, which are passed through in wholesale prices and ultimately your unit rate.Comparing Bills Between Suppliers
When comparing suppliers, focus on your Estimated Annual Bill (EAB), which accounts for:
- Unit rates (at your usage level)
- Standing charges
- PSO levy
- Any discounts
Don't just compare unit rates—a supplier with a lower unit rate but higher standing charge might cost you more overall.
Use our energy [comparison tool](/energy/compare) to calculate your exact costs with each supplier based on your actual usage.
Summary
Understanding your electricity bill helps you spot errors, compare suppliers effectively, and identify opportunities to reduce costs. The key components are:
- Unit charges: Variable cost based on consumption
- Standing charge: Fixed daily fee
- PSO levy: Government charge for renewable energy
- VAT: 9% on all charges
If your bill seems wrong, start by checking whether readings are actual or estimated, and whether any promotional discounts have expired.
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Last updated: January 2026---
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