How to compare business electricity (UK guide)
A practical, UK-specific way to compare business electricity prices, contract terms and suppliers — with the checks that prevent costly surprises (standing charges, pass-throughs, and renewal traps).
- Compare on total cost (unit rate + standing charge + pass-throughs), not headline p/kWh
- Know your meter type (HH/Non-HH, smart, multi-rate) before you request quotes
- Get like-for-like quotes: term length, payment method, start date and credit terms
No obligation. Quotes are based on the details you provide and supplier availability. Terms, prices and credit checks vary by supplier.
Fast answer: how to compare business electricity
The most reliable way to compare business electricity is to total your estimated annual cost using your kWh usage and the supplier’s unit rate and standing charge, then confirm any pass-through charges, contract length, payment method and exit fees are like-for-like. Use your latest bill (MPAN, meter type, usage) and request quotes for the same start date.
Key takeaway 1
A lower p/kWh can still cost more if the standing charge is higher or pass-throughs aren’t explained.
Key takeaway 2
Your meter matters: half-hourly (HH) and multi-rate meters need HH-aware quotes to be comparable.
Key takeaway 3
Start early: begin comparing around 8–12 weeks before your end date to avoid rollover rates.
Important: Business energy contracts are usually fixed-term agreements. Ending early can trigger termination fees, and some deals include pass-through charges that vary over time. Always ask for the full tariff structure in writing before you agree.
Step-by-step: comparing business electricity the right way
To get quotes you can genuinely compare, keep every input consistent. These steps also reduce the risk of a supplier re-pricing later because of missing data.
- Find your key details on a bill: MPAN (electricity supply number), business address and postcode, current supplier, contract end date, and your annual kWh (or last 12 months).
- Confirm your meter setup: single-rate, multi-rate (e.g., day/night), smart meter, or half-hourly (HH). If you have HH, ask for HH-based pricing (not a non-HH estimate).
- Decide what you’re comparing: fixed vs flexible/variable, contract length (e.g., 12/24/36 months), and whether you want electricity-only or combined meters/sites.
- Request like-for-like quotes: same start date, same payment method (monthly Direct Debit vs BACS), same billing preference, same credit terms where possible.
- Compare total estimated annual cost: (unit rate × kWh) + (standing charge × days) plus any pass-throughs you can estimate.
- Check the contract small print: termination fees, renewal/rollover process, price review clauses (if any), deemed/ out-of-contract rates, and change-of-tenancy rules.
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What you’ll need (quick list)
From your bill: MPAN, annual kWh (or last 12 months), contract end date, current rates.
About your business: sector, opening hours, whether you can shift usage off-peak (if multi-rate/HH).
Preferences: term length, green electricity preference (certified), billing/payment method.
What to compare (beyond the headline unit rate)
Two quotes can look similar but bill very differently. Use the table below to keep comparisons fair and avoid hidden cost drivers.
| What to compare | Why it matters | What to ask suppliers |
|---|---|---|
| Unit rate (p/kWh) | Main driver of cost, but only when usage is consistent and the quote is like-for-like. | Is this fixed for the full term? Is it different by time band (HH) or day/night? |
| Standing charge (p/day) | High standing charges can outweigh a lower unit rate, especially for low-use sites. | Is it fixed? Does it change by region (DNO area) or meter type? |
| Pass-through charges | Some contracts pass through third-party costs (e.g., network charges) that can change. | Which charges are pass-through and which are included? Can you provide examples from my region? |
| Contract length | Longer terms can bring price certainty but reduce flexibility if circumstances change. | 12, 24 or 36 months available? Any break clauses? What are termination fees? |
| Payment method & billing | Monthly Direct Debit, BACS, paper vs e-billing can affect price and admin burden. | Any discounts/charges by payment type? Estimated vs actual billing? Read submission options? |
| Renewal & out-of-contract rates | If you miss renewal windows, you may fall onto deemed/out-of-contract rates. | What happens at end of term? Notice periods? When can I renew without penalties? |
Decision checklist: who this approach suits
- SMEs, shops, offices and light industrial sites with known annual kWh
- Businesses approaching contract end and wanting to avoid rollover pricing
- Multi-site operators who need consistent, comparable quote inputs
When you may need extra support
- Half-hourly (HH) meters, complex time bands, or multiple MPANs
- Landlord/tenant changes, new connections, or recent change-of-tenancy
- Very high usage (where flexible purchasing may be relevant)
If any of these apply, focus on quote accuracy first (meter data, start date, consumption profile) before chasing a lower p/kWh.
Costs, exclusions and common pitfalls (UK)
These are the most common reasons business electricity comparisons go wrong. Use the cards below as a pre-flight check before you sign.
1) Comparing p/kWh without standing charge
A quote with a lower unit rate can still cost more overall if the standing charge is higher. Always calculate annual cost using your usage and days in contract year.
2) Pass-through charges not explained
Some contracts pass through third-party costs that can change. Ask what’s included in the unit rate and what’s billed separately.
3) Wrong meter type (HH vs Non-HH)
HH sites are priced differently. If you compare an HH site on a non-HH estimate, the final contract price may differ from the initial quote.
4) Auto-renewal/rollover risk
Business contracts can move to deemed or out-of-contract rates if you don’t renew in time. Start comparisons early and diarise key dates.
5) Termination fees and notice periods
Leaving early or switching at the wrong time can incur fees. Confirm your contract end date, notice window and any termination charges before agreeing a start date.
6) VAT and levies assumptions
Quotes may be shown ex-VAT. Many businesses pay 20% VAT; some may be eligible for the reduced rate. Always confirm what’s included and what you’ll actually pay.
Tip for accuracy: If you have seasonal usage (e.g., hospitality, manufacturing peaks), provide a recent 12-month view rather than a single month. Better usage inputs = more comparable quotes.
Two realistic comparison scenarios (with numbers)
These examples show why comparing total annual cost is safer than focusing on unit rate alone. Figures are illustrative and exclude VAT; pass-throughs can apply depending on contract.
Scenario A: Small office, low-to-medium usage
- Assumptions
- Annual usage: 12,000 kWh • 365 days • single-rate • comparing 12-month fixed quotes • excluding VAT.
- Quote 1
- Unit rate 28.0p/kWh; standing charge 60p/day → estimated annual cost = (12,000 × £0.28) + (365 × £0.60) = £3,579.
- Quote 2
- Unit rate 27.0p/kWh; standing charge 95p/day → estimated annual cost = (12,000 × £0.27) + (365 × £0.95) = £3,587. Lower unit rate, slightly higher total cost.
Scenario B: Small workshop, higher usage
- Assumptions
- Annual usage: 60,000 kWh • 365 days • single-rate • comparing 24-month fixed quotes • excluding VAT.
- Quote 1
- Unit rate 25.0p/kWh; standing charge 70p/day → estimated annual cost = (60,000 × £0.25) + (365 × £0.70) = £15,256.
- Quote 2
- Unit rate 25.6p/kWh; standing charge 40p/day → estimated annual cost = (60,000 × £0.256) + (365 × £0.40) = £15,506. Here, the lower standing charge doesn’t offset the higher unit rate.
Caveat: Real bills can include additional elements (for example, varying third-party charges, reactive power for some sites, or HH time bands). Use these scenarios as a method, not as a prediction of what you’ll pay.
FAQs
What information do I need to compare business electricity quotes?
Ideally: your MPAN, business postcode and address, contract end date, meter type (HH/non-HH, single or multi-rate), and your last 12 months’ kWh usage. If you don’t have everything, start with postcode and a recent bill and confirm details during the quote process.
Can I switch business electricity before my contract ends?
Sometimes, but it depends on your contract terms and notice period. Switching too early may trigger termination fees. A safer approach is to compare and agree a new contract to start on (or just after) your current end date, unless your supplier confirms an early switch is penalty-free.
What’s the difference between fixed, variable and deemed business electricity rates?
Fixed contracts typically lock unit rates (and sometimes standing charges) for an agreed term. Variable rates can change, depending on the supplier. Deemed (or out-of-contract) rates may apply when you move in or your contract ends without a new agreement; these can be significantly higher, so it’s worth arranging a contract in advance.
How do standing charges affect a small business bill?
Standing charges are paid per day regardless of usage. If your business uses relatively little electricity (or has seasonal closures), a higher standing charge can make a “cheap” unit rate poor value. That’s why comparing estimated annual cost (unit rate × kWh + standing charge × days) is usually more reliable.
Does my location in the UK change business electricity prices?
It can. Network costs vary by region (your Distribution Network Operator area), and some quotes reflect that. That’s one reason postcode is needed for accurate comparisons. Always compare quotes using the same site address and meter details.
Are business electricity prices shown with or without VAT?
Often quotes are shown excluding VAT, but it varies. Many businesses pay 20% VAT on electricity; some uses may qualify for a reduced rate. Always confirm whether prices are ex-VAT or inc-VAT and make sure you compare quotes on the same basis.
What is a half-hourly (HH) meter and why does it matter for comparing?
An HH meter records usage every 30 minutes. Pricing can be based on time bands and your usage profile, not just total kWh. To compare properly, you’ll need HH-aware quotes (and sometimes recent HH data) so you’re not comparing an estimate against a profile-based price.
How early should I compare business electricity before renewal?
A practical window is around 8–12 weeks before your contract end date. It gives time to gather correct meter details, request like-for-like quotes and avoid last-minute rollovers. Your contract may also have a notice period, so check your terms.
Trust, methodology and sources
Editorial details
- Written by
- EnergyPlus Editorial Team
- Reviewed by
- Energy Specialist
- Last updated
- July 2026
How we assess “best value” when comparing quotes
This page focuses on helping UK businesses make a like-for-like comparison. We prioritise total cost and contract risk, not just headline p/kWh.
- Total estimated annual cost: (unit rate × kWh) + (standing charge × days), with notes on pass-throughs where relevant.
- Tariff structure clarity: fixed vs variable elements; treatment of pass-through charges and time-of-use bands.
- Contract terms: length, renewal approach, notice periods, termination fees, and start-date flexibility.
- Practical fit: suitability for meter type (HH/non-HH), multi-rate needs and payment/billing preferences.
Limitations (what this guide cannot do)
- It cannot guarantee the cheapest tariff for every business — supplier pricing depends on usage shape, credit checks, meter configuration and market conditions.
- It does not replace supplier contract documents. Always review your contract summary and terms before you sign.
- Pass-through charges and certain non-energy elements can change and may not be fully predictable from a simple rate comparison.
Sources (UK)
- Ofgem (UK energy regulator) — guidance on energy markets and consumer protections.
- Citizens Advice: Energy — practical help for billing, complaints and supplier issues.
- GOV.UK: Energy — official information on energy policy and support schemes.
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