How Irish Energy Prices Work (And Why Your Bills Keep Rising)
Decoding a commercial electricity bill — unit rates, standing charges, capacity charges, PSO levy, and carbon tax. Which costs you can control and why reducing consumption matters more than switching supplier.
Every Irish business pays energy bills. Very few business owners actually understand what’s on them.
This isn’t a criticism — commercial energy bills are genuinely opaque. Unit rates, standing charges, capacity charges, the PSO levy, carbon tax, and VAT at different rates all appear on the same invoice, making it nearly impossible to tell at a glance which costs you can control and which you can’t.
This guide breaks down how Irish commercial energy pricing works, why your bills keep increasing even when your usage doesn’t, and — most importantly — which lever actually moves the needle on cost.
The bottom line up front: Switching supplier can save 5–15% on one component of your bill. Reducing consumption saves 20–40% on all components. Energy efficiency delivers 2–3x the savings of supplier switching, and the savings don’t expire after a promotional period.
Anatomy of a Commercial Electricity Bill
A typical Irish commercial electricity bill has several components. Here’s what each one means and whether you can influence it:
| Component | % of Bill | Can You Reduce It? | How? |
|---|---|---|---|
| Unit rate (energy charge) | 35–45% | Partially — by switching supplier or negotiating | Supplier choice |
| Network charges (DUoS/TUoS) | 20–25% | No — regulated, same for everyone | Cannot change |
| Capacity charge (MIC) | 5–10% | Yes — by reviewing your maximum demand | Right-sizing |
| PSO levy | 5–8% | No — government-set levy | Cannot change |
| Carbon tax | 3–5% | Only by reducing fossil fuel use | Consumption |
| Standing charge | 2–4% | No — fixed per connection | Cannot change |
| VAT (13.5%) | On total | Only by reducing the total bill | Consumption |
Key insight: Only about 35–45% of your bill (the unit rate) changes when you switch supplier. The other 55–65% is fixed or regulated. That’s why switching supplier alone has limited impact — and why reducing consumption affects the entire bill.
Unit rate (energy charge)
This is what your supplier charges per kilowatt-hour (kWh) of electricity consumed. It’s the only component that varies between suppliers and the one that’s negotiable.
For commercial customers, unit rates in Ireland typically range from 22–32c/kWh depending on your consumption level, contract terms, and supplier. Higher-volume customers get better rates. Day/night tariffs (where available) charge less for off-peak usage.
Network charges
These pay for the physical grid infrastructure that delivers electricity to your premises. They’re set by the Commission for Regulation of Utilities (CRU) and are the same regardless of which supplier you use. You can’t negotiate them, switch away from them, or opt out.
Network charges have been increasing as ESB Networks invests in grid infrastructure to support renewable energy and electrification.
Capacity charge (MIC)
Your Maximum Import Capacity (MIC) is the maximum amount of power your premises is authorised to draw from the grid at any one time, measured in kVA. You pay for this capacity whether you use it or not.
Why this matters: If your MIC was set when the building had different equipment (or a previous tenant), you may be paying for capacity you don’t need. Conversely, if you exceed your MIC, you’ll face penalty charges. An energy audit can identify whether your MIC is appropriately sized.
PSO levy
The Public Service Obligation levy funds support schemes for renewable electricity generation and security of supply. It’s a flat charge per billing period, set annually by the CRU. Every customer pays it.
Carbon tax
Carbon tax on electricity is indirect — it’s embedded in the generation cost because gas-fired power stations pass through their carbon costs. On gas bills, carbon tax appears directly as a separate line item.
How Gas Bills Work
If your business uses gas for heating, your gas bill is simpler but still has multiple components:
| Component | What It Covers |
|---|---|
| Unit rate | Cost per kWh of gas consumed |
| Standing charge | Fixed daily/monthly connection charge |
| Carbon tax | Direct charge based on CO2 content of gas consumed |
| VAT (13.5%) | On the total |
The carbon tax component on gas is significant and growing. At €56/tonne (2025 rate), carbon tax adds approximately 1.1c per kWh to the cost of natural gas. At €100/tonne (2030 target), this rises to approximately 2.0c per kWh — nearly doubling the carbon tax component.
For a business consuming 50,000 kWh of gas per year (a typical small office), the carbon tax component alone will increase from roughly €550 to €1,000 per year between 2025 and 2030.
Why Your Bills Keep Rising
Understanding why costs increase helps you plan and invest:
1. Carbon tax escalation
This is the most predictable cost increase. Ireland’s carbon tax trajectory is legislated:
| Year | Carbon Tax (per tonne CO2) | Impact on Gas (per kWh) |
|---|---|---|
| 2024 | €48.50 | ~0.98c |
| 2025 | €56.00 | ~1.13c |
| 2026 | €63.50 | ~1.29c |
| 2027 | €71.00 | ~1.44c |
| 2028 | €78.50 | ~1.59c |
| 2029 | €89.25 | ~1.81c |
| 2030 | €100.00 | ~2.03c |
This schedule is law. It will happen regardless of wholesale energy prices. The only way to offset it is to use less fossil fuel.
2. Network investment costs
The grid needs massive investment to support Ireland’s renewable energy targets and electrification (heat pumps, EVs). These costs are recovered through network charges, which increase steadily.
3. Wholesale energy volatility
Wholesale electricity and gas prices fluctuate with global markets. The energy price crisis of 2022–2023 demonstrated how quickly costs can spike. While prices have moderated, Ireland’s reliance on imported gas means we remain exposed to global market movements.
4. Demand growth
As the economy electrifies (EVs, heat pumps, data centres), demand for electricity increases. This puts upward pressure on both wholesale prices and network charges.
Switching Supplier vs. Reducing Consumption
Most businesses that decide to “do something about energy costs” start by switching supplier. It’s the path of least resistance — a phone call or an online form, no physical changes required.
Switching can save money. But here’s the comparison:
| Approach | Typical Saving | Duration | Effort | Affect on Total Bill |
|---|---|---|---|---|
| Switch supplier | 5–15% of unit rate | 12–24 months (contract period) | Low | Affects ~40% of bill |
| Reduce consumption 20% | 20% of entire bill | Permanent | Moderate | Affects 100% of bill |
Example: A business with a €15,000 annual electricity bill:
- Switching supplier at a 10% better unit rate saves roughly €600–€700/year (10% × 40% of bill)
- Reducing consumption 20% saves €3,000/year — and this saving compounds as prices rise
The two approaches aren’t mutually exclusive. Switch supplier AND reduce consumption. But if you can only do one, reduce consumption. The savings are larger and permanent.
The Components You Can Actually Control
Here’s a practical summary of which costs are within your power to reduce:
Controllable through consumption reduction
- Unit rate costs — use less, pay less
- Carbon tax — direct reduction on gas; indirect on electricity
- VAT — percentage of total, so lower total = lower VAT
- Capacity charge — may be reducible if MIC is oversized
Controllable through supplier choice
- Unit rate — negotiate or switch for better rates
- Contract terms — fixed vs variable, contract length
Not controllable
- Network charges — regulated, non-negotiable
- PSO levy — government-set
- Standing charges — fixed per connection
This is why we consistently recommend that businesses start with a commercial energy audit before worrying about supplier contracts. The audit identifies where consumption can be reduced — which affects the majority of your bill.
Reading Your Bill: What to Look For
When you review your commercial energy bills, check these things:
Consumption trends
Plot your monthly kWh consumption over 12–24 months. Is it stable, rising, or seasonal? Unexpected increases often indicate equipment issues, changed operating hours, or waste.
Baseload
Your baseload is the minimum consumption your building draws overnight and on weekends when nobody’s there. For most offices and retail units, this should be 20–30% of peak-day consumption. If your baseload is 50%+ of your peak, you’re running equipment unnecessarily.
Day/night split
If you’re on a day/night tariff, what percentage of consumption falls in the night rate? Could processes or equipment be shifted to off-peak hours?
MIC utilisation
If your capacity charge is significant, compare your actual maximum demand against your MIC. If there’s a large gap, talk to your supplier about a review.
Year-on-year comparison
Compare the same month across years. Increases that can’t be explained by rate changes indicate consumption growth — which is worth investigating.
What Interval Meter Data Reveals
If your premises has a smart meter (and most commercial premises do or soon will), you can access half-hourly consumption data. This is far more revealing than monthly bills:
- Exact baseload — what your building draws at 3am on a Sunday
- Peak demand timing — when your maximum draw occurs
- Equipment signatures — heating, lighting, and equipment show distinct patterns
- Waste identification — consumption during closed hours, heating patterns that don’t match occupancy
We cover this in detail in our guide to interval meters and energy data.
Next Steps
- Gather 12 months of bills. Electricity and gas/oil. Total them up. Compare the number to the sector benchmarks.
- Identify your baseload. Check weekend/overnight consumption. If it seems high, there’s waste.
- Book a commercial energy audit to get a professional assessment of where your costs go and which reductions are achievable. SEAI covers the audit cost.
- Read the SEAI business grants guide for funding that reduces the cost of improvements.
Your energy bill isn’t a fixed cost. Most of it is controllable — you just need to know which parts to target.
Irish commercial energy prices are among the highest in Europe, and the trajectory is upward. But the components of your bill that you can control — through consumption reduction and efficiency — represent the majority of your total spend. Understanding your bill is the first step to managing it.