Business energy unit rate comparison (UK): how to compare prices properly
Understand what a “unit rate” really means for UK business gas & electricity, what affects it, and how to compare quotes on a like‑for‑like basis before you switch.
- See the key price parts: unit rate (p/kWh), standing charge, pass‑throughs and VAT
- Compare fixed vs flexible contracts with a practical checklist and pitfalls to avoid
- Get an estimated comparison with real‑world examples (assumptions shown)
Estimates only. Business tariffs, availability and terms vary by meter type, region, credit checks and contract length.
Fast answer: what’s the best way to compare business energy unit rates?
In the UK, the unit rate (p/kWh) is only one part of what you’ll pay. To compare business energy quotes fairly, you need to check:
1) Standing charge
A daily charge (p/day). Two tariffs can have the same unit rate but very different standing charges.
2) Pass-through charges
Common in business contracts (e.g., network costs). These can be bundled or itemised and affect the true comparison.
3) VAT & eligibility
Most businesses pay 20% VAT, but some may qualify for 5%. Quotes may show ex VAT or inc VAT.
Quick rule: If you only compare p/kWh, you can pick a “cheap” unit rate that costs more overall once standing charges and pass-throughs are applied.
If you want a like-for-like estimate, gather your meter details (MPAN/MPRN), postcode, contract end date, and a recent bill showing annual kWh.
Compare business energy unit rates (whole of market)
Use EnergyPlus to request quotes across a wide range of UK suppliers. We’ll help you compare the unit rate, standing charge and key terms so you can make a decision that fits your cash flow and risk appetite.
What you’ll need
- Postcode & business name
- Electricity MPAN and/or gas MPRN (from your bill)
- Estimated annual kWh (or last 12 months spend)
- Contract end date (if known)
We’ll help you check
- Unit rate vs standing charge trade-offs
- Pass-through vs all-inclusive pricing
- Contract length, exit fees, payment terms
Important: Business energy prices can change daily. Any quote is subject to supplier acceptance, credit checks (where applicable) and accurate meter information.
Get your estimate
Prefer to research first? Jump to the comparison table to see what to check in any supplier quote.
How business energy unit rates work (and what changes them)
A business electricity or gas unit rate is the price you pay for each kilowatt hour (kWh) you use. For most SMEs, it’s expressed in pence per kWh (p/kWh) and can be fixed for the contract term (fixed tariff) or variable (linked to market prices in flexible arrangements).
What’s typically included in “unit rate”
- Energy cost
- The wholesale element and supplier margin (exact structure varies).
- Some network & policy costs (sometimes)
- Depending on whether pricing is all‑inclusive or pass‑through.
- Not always VAT
- Quotes might be shown ex VAT. Always confirm before comparing.
What changes your unit rate
- Meter type (single rate vs Economy 7; smart vs traditional; half-hourly)
- Consumption and profile (day/night usage pattern; peak times; seasonality)
- Region and network (distribution area impacts network charges)
- Contract length (1, 2, 3, 4, 5 years can price differently)
- Payment method (e.g., Direct Debit vs other terms where offered)
- Credit factors (some suppliers apply credit checks or require deposits)
Tip for accurate comparisons: ask for an estimated annual cost using your annual kWh and the exact standing charge. If the quote includes pass-through charges, ask how they’re calculated and whether they are capped.
Two realistic examples (with assumptions)
These scenarios show why comparing p/kWh alone can mislead. The numbers are illustrative and not a promise of savings. We’ve kept the maths simple to make the trade-offs clear.
Scenario A: small office (electricity)
Assumptions: 12,000 kWh/year; 365 days; prices shown ex VAT; no extra pass-through variations beyond what’s reflected in the rate/standing charge.
| Quote | Unit rate | Standing charge | Estimated annual cost |
|---|---|---|---|
| Quote 1 | 24.0p/kWh | 65p/day | £2,880 + £237 ≈ £3,117 |
| Quote 2 | 22.8p/kWh | 115p/day | £2,736 + £420 ≈ £3,156 |
Even though Quote 2 has a lower unit rate, the higher standing charge makes it slightly more expensive for this usage level.
Scenario B: café with gas (heating + hot water)
Assumptions: 45,000 kWh/year gas; 365 days; prices shown ex VAT; standing charge applies daily.
| Quote | Unit rate | Standing charge | Estimated annual cost |
|---|---|---|---|
| Quote 1 | 6.4p/kWh | 35p/day | £2,880 + £128 ≈ £3,008 |
| Quote 2 | 6.8p/kWh | 10p/day | £3,060 + £37 ≈ £3,097 |
Here, the lower unit rate wins, but if the café used less gas (e.g., summer-only trading), the low standing charge option could become more attractive.
VAT note: Most business energy is charged at 20% VAT. Some organisations may be eligible for 5% VAT (subject to criteria). Always confirm whether quotes are shown including or excluding VAT before deciding.
Business energy unit rate comparison: what to check in every quote
Use this table to compare quotes consistently. If a supplier or broker can’t clearly answer these points, treat the comparison as incomplete.
| What to compare | Why it matters | What to ask for |
|---|---|---|
| Unit rate (p/kWh) | Main variable part of your bill; depends on profile and risk. | Is it fixed for the full term? Any time-of-use or day/night splits? |
| Standing charge (p/day) | High standing charges can outweigh a “cheap” unit rate at low usage. | Confirm exact p/day and whether it can change during the term. |
| All-inclusive vs pass-through | Pass-through charges can move; all-inclusive is simpler but may be priced differently. | Which charges are pass-through? Are they capped? How are they calculated? |
| Contract length | Affects risk and pricing; longer terms can provide certainty but reduce flexibility. | Prices for 12/24/36 months and what happens at renewal. |
| Exit fees & rollover terms | Early termination can be costly; rollover rates can be higher if you miss deadlines. | Exit fee calculation and the notice window to avoid auto-rollover. |
| Billing and payment method | Direct Debit or other terms can change the headline price and cash flow. | Payment terms, billing frequency, paper billing fees, late payment charges. |
| Meter details | Wrong meter type can invalidate the quote or change charges. | Confirm MPAN/MPRN, profile class, HH status, and any planned meter exchange. |
Decision checklist: who unit-rate shopping suits
- Stable usage month-to-month and you want budget predictability
- You can provide accurate annual kWh (or bills) for correct pricing
- You’re comparing like-for-like (VAT basis, same term length, same meter type)
- You have time to check standing charge + pass-throughs, not just p/kWh
Who it may not suit (without help)
- You have half-hourly (HH) electricity and need profile-led analysis
- Your business is seasonal (standing charge impact can be significant)
- You’re considering flexible purchasing and need risk controls / governance
- You’re in a complex site (multiple meters, landlord supplies, sub-metering)
Practical next step: Ask for each quote to be summarised as estimated annual cost using your annual kWh, with a clear breakdown of what is fixed and what can vary.
Costs, exclusions and common pitfalls (UK business energy)
Business energy contracts can include terms and charges that don’t show up in a headline unit rate. These are the most common issues we see when businesses compare quotes.
Pass-through volatility
With pass-through pricing, parts of the bill may change even if your “unit rate” looks fixed. Get clarity on which elements can move and how they’re billed.
Auto-rollover / renewal risk
If you don’t renegotiate in time, some contracts can move to out-of-contract rates. Note your end date and any notice periods.
Wrong meter assumptions
Economy 7, smart meters, or half-hourly metering can materially change pricing. A quote based on the wrong setup may not be honoured.
Other charges to look out for
- Early termination / exit fees (can be significant if you move premises or close)
- Deemed rates (if you move in without a contract agreed)
- Paper billing fees or admin charges (supplier-dependent)
- Late payment charges and interest terms
- Meter reading issues (estimated reads can cause bill spikes; submit reads where possible)
Red flags when comparing unit rates
- The quote doesn’t clearly state ex VAT or inc VAT
- Standing charge is missing or described vaguely (“standard applies”)
- “All inclusive” is claimed but the contract mentions pass-through line items
- Contract start date is unclear (important if your current contract has end/notice rules)
- No written confirmation of term length and exit fees
Moving premises? Tell the supplier/broker early. Many business contracts treat a move as a contract change with specific rules; you may need a new agreement for the new meter.
FAQs: business energy unit rates (UK)
1) What is a good unit rate for business electricity in the UK?
There isn’t a single “good” rate that applies to all businesses. Your unit rate depends on meter type, region, annual usage, contract length, and whether charges are all-inclusive or pass-through. The safest way to judge value is to compare estimated annual cost on the same assumptions (kWh, standing charge, VAT basis and term length).
2) Are business unit rates the same as domestic?
No. Business energy pricing is typically contract-based and can include different structures (including pass-through charges). Consumer protections and switching rules can also differ from home energy.
3) What’s the difference between “all-inclusive” and “pass-through” pricing?
With all-inclusive, the supplier bundles expected network/policy costs into the headline price. With pass-through, certain costs are charged separately and may vary over time. Neither is automatically better; pass-through can be transparent but less predictable.
4) Why do two businesses in the same town get different unit rates?
Even at the same postcode, unit rates can differ based on consumption level, usage pattern (day/night), meter class (including half-hourly), contract length, payment terms and credit factors. Different suppliers also price risk and margin differently.
5) Do business energy quotes include VAT?
Not always. Many quotes are shown ex VAT. Most businesses pay 20% VAT, but some may qualify for 5% depending on circumstances. Always confirm the VAT basis before comparing quotes or budgeting.
6) Can I switch business energy if I’m still in contract?
You usually can, but you may face exit fees or other contract charges. If you’re near the end of your term, it may be possible to agree a future-dated contract. Check your current contract terms and renewal window.
7) What information do I need to get accurate unit rate quotes?
Ideally: your MPAN (electricity) and/or MPRN (gas), postcode, business name, contract end date, meter type, and annual kWh usage from a recent bill. The more accurate your data, the more reliable the quote.
8) What is a deemed rate and why does it matter?
If you move into premises and start using energy without agreeing a contract, you may be placed on a deemed tariff. Deemed rates can be higher and terms can vary, so it’s usually worth arranging a contract as early as possible when moving.
Have a question about your meter, renewal date or quote wording? Request quotes and we’ll help you interpret the key terms before you commit.
Trust, methodology and sources
Page ownership
- Written by: EnergyPlus Editorial Team
- Reviewed by: Energy Specialist
- Last updated: May 2026
How we assess “unit rate comparisons”
This guide focuses on making a like-for-like comparison between business energy quotes. We prioritise the elements that most often change the total cost:
- Unit rate (p/kWh) and whether it is fixed or variable
- Standing charge (p/day)
- Whether pricing is all-inclusive or includes pass-through charges
- Contract length, renewal windows and exit fees
- VAT basis (ex VAT vs inc VAT) and eligibility caveats
Limitations: The example costs on this page are simplified estimates and don’t model all line items that can appear on a business bill (especially where pass-through charges vary). Supplier availability and pricing depend on accurate meter data, contract timing and supplier acceptance.
Independent UK sources we use
- Ofgem (UK energy regulator) – guidance on the energy market and consumer protections
- Citizens Advice energy advice – practical help on bills, complaints and supplier issues
- GOV.UK – broader UK government guidance relevant to business operations and regulation
We also refer to supplier contract documentation and your bill/meter data when comparing quotes.
Ready to compare business unit rates with confidence?
Request quotes and we’ll help you compare unit rates, standing charges and key terms on a like-for-like basis.
No guaranteed savings. Quotes are subject to supplier terms, meter details and contract availability.
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