Business energy contract types in the UK (explained)

Understand the main business electricity and gas contract types, what they cost, where the risks sit, and how to choose the right structure for your site(s), meter and cashflow.

  • Clear comparison of fixed, variable/rolling, out-of-contract and flexible (basket) deals
  • UK-specific caveats: meters, deemed rates, COTs, exit fees and VAT rules
  • Practical decision checklist and worked examples with stated assumptions
Get business energy quotes How to choose the right contract

We compare whole-of-market options where available. Prices are indicative only and depend on meter type, usage, credit checks and supplier terms.

Fast answer: what business energy contract types are there?

In the UK, most businesses will be offered one (or more) of these contract types for electricity and gas:

Fixed-rate (1–5 years)

Unit rates and standing charges are fixed for the term (subject to contract terms). Best for budgeting and most SMEs.

Variable / rolling (month-to-month)

Rates can change (often with notice). Useful for short-term flexibility but typically less price certainty.

Out-of-contract / deemed

If you move in or your contract ends without renewal, you may pay a supplier’s deemed or out-of-contract rates (often higher).

Flexible / basket (usually larger users)

Pricing can be bought in blocks over time (part fixed/part floating). Often paired with half-hourly settlement and risk management.

Key takeaway: For most UK SMEs, a fixed-rate contract is the simplest option for budgeting, while rolling can suit short time horizons. Flexible contracts can work well for higher consumption sites that can manage market timing and have internal governance.

Quick checks before you choose

  • Meter type: smart/AMR, half-hourly (HH) or non-half-hourly (NHH)
  • Payment method: monthly DD, on receipt of bill, or prepay (where available)
  • Site status: moving in, renewing, or switching mid-term (exit fees may apply)
  • Usage profile: steady vs seasonal; single site vs multi-site portfolio

If you only do one thing

Avoid drifting onto deemed/out-of-contract rates when you move into new premises or reach end-of-term. Start comparing 8–16 weeks before renewal (some suppliers allow earlier) so you can align notice windows and avoid rushed decisions.

Business energy contract types (UK): what they mean in practice

Business energy contracts can look similar on the surface (unit rate + standing charge), but the risk and the rules differ. Below is what UK businesses typically encounter, including the common “gotchas” that affect cost and switching.

1) Fixed-rate business energy contract

A fixed contract sets your agreed unit rate(s) and standing charge(s) for a defined term (commonly 12, 24, 36 or 60 months). You still pay more or less overall depending on how much you use.

  • Best for: budgeting certainty, stable cashflow planning, most SMEs.
  • Watch for: end dates, renewal windows, automatic rollovers, and early exit/termination fees.
  • Meter note: suppliers may quote differently for HH vs NHH meters; profiles matter.

2) Variable or rolling (month-to-month) contract

A variable (sometimes called rolling) contract has no long fixed term. Prices can change, typically with supplier notice. This can help if you need flexibility (e.g., short lease), but you carry price-change risk.

  • Best for: short-term occupancy, bridging between contracts.
  • Watch for: rate changes, notice periods, and whether there are minimum terms hidden in T&Cs.

3) Deemed / out-of-contract rates (often the most expensive)

If you move into a property and start using energy without agreeing a contract, you usually fall onto a deemed contract with the current supplier. Similarly, if your fixed contract ends and you don’t renew, you may be placed on an out-of-contract (sometimes called rollover) rate.

  • Best for: ideally, nobody—use it only as a temporary default.
  • Watch for: higher rates, difficulty budgeting, and confusion around who the current supplier is at new premises.
  • Action: identify the supplier and your MPAN/MPRN quickly so you can compare and switch.

4) Flexible / basket / block purchasing contracts

Flexible contracts are designed for larger or more energy-aware organisations. Instead of fixing everything at once, you can buy portions of your expected usage at different times (e.g., 25% now, 25% later), leaving the remainder floating until purchased.

  • Best for: higher annual consumption, multi-site groups, or users with governance to manage procurement.
  • Watch for: volume tolerances, shaping costs, imbalance risk allocation, and fees for risk management services.
  • Data requirement: better interval data (often HH) typically improves suitability and pricing accuracy.

Important: Unlike domestic energy, business energy is not covered by the Ofgem price cap. Contract structures, notice periods and fees vary by supplier and customer segment.

How to choose the right business energy contract type

Step 1: Confirm your meter details

Find your MPAN (electricity) and MPRN (gas), plus meter type (smart/AMR/HH/NHH). These affect eligibility and quotes.

Step 2: Decide what you’re optimising for

Most SMEs prioritise budget certainty (fixed). If you prioritise flexibility (short lease) a rolling option may fit better. If you can manage procurement risk, flexible may help.

Step 3: Check contract timings and termination windows

Many suppliers have a termination notice window. Missing it can mean you roll onto a higher rate or have switching delayed.

Step 4: Compare on total cost and risk, not just unit rate

Standing charges, pass-through charges, credit requirements, payment terms, and flexibility can materially change the outcome.

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Tip for faster quotes: if you have a recent bill, keep it handy (MPAN/MPRN, annual kWh, contract end date, and current supplier name).

What affects eligibility and pricing in the UK?

  • Region & network: distribution area can affect charges and standing charge levels.
  • Metering & settlement: HH vs NHH, smart/AMR capability, and data quality.
  • Credit & payment terms: direct debit vs invoice; some suppliers require deposits.
  • Usage shape: day/night split, seasonal peaks, and demand profile.
  • Multi-site: portfolio pricing may differ from single-site deals.

Comparison: which business energy contract type should you choose?

Use this table to compare the practical differences. Supplier naming can vary, but the underlying trade-offs are consistent.

Contract type Price certainty Flexibility Typical term Common UK watch-outs
Fixed High Low–medium 1–5 years Exit fees, notice windows, renewal rollover rates, pass-through charges
Rolling / variable Low–medium High Ongoing Rate changes, notice periods, “intro” pricing that increases later
Deemed / out-of-contract Low Medium (but costly) Until you agree/switch High rates, unclear supplier at move-in, delayed switching if details are wrong
Flexible / basket Medium–high (depending on strategy) Medium Often 1–3 years Volume tolerance, governance needs, fees, exposure if you don’t hedge in time

Decision checklist (who it suits)

Fixed
Suits you if you want stable budgeting, have a known tenancy horizon, and prefer simple bills.
Rolling / variable
Suits you if you might relocate soon or need flexibility while you gather data and bills.
Flexible
Suits you if you have higher usage, internal approval processes, and can handle market timing and reporting.

Decision checklist (who it doesn’t)

Fixed
May not suit if you’re on a very short lease or may close the site before term ends (exit fees can apply).
Rolling / variable
May not suit if price volatility would materially harm margins or cashflow.
Flexible
May not suit if you need “set-and-forget” simplicity or cannot forecast usage with confidence.

Costs, exclusions and common pitfalls (UK-specific)

A good contract type can still become expensive if the details don’t match your site, meter or business situation. These are the issues we see most often.

1) Standing charges and pass-throughs

Two quotes with similar unit rates can still differ on total cost due to standing charges and “pass-through” elements. Always compare an estimated annual cost based on your kWh and profile.

2) Deemed/out-of-contract at move-in

When you take on a new unit, the supplier may not be obvious. If you don’t agree terms quickly, you can pay deemed rates. Get MPAN/MPRN, take opening reads, and start a comparison early.

3) Auto-renewal and notice windows

Some business contracts have specific termination notice periods. Missing the window can mean you roll onto higher rates or delay switching. Put end dates in a calendar.

4) Early termination fees

Fixed deals commonly include exit fees if you leave before the end date (including moving premises). Ask how fees are calculated and whether there’s any relocation process.

5) VAT and the Climate Change Levy

Many businesses pay 20% VAT, but some may be eligible for 5% VAT (e.g., low usage) subject to rules and evidence. CCL may apply depending on your situation. Confirm treatment on quotes and invoices.

6) Half-hourly data, capacity and profile

For HH meters, your time-of-use profile can materially affect cost. For some sites, capacity and maximum demand considerations matter too. Provide interval data where possible for accurate pricing.

Reality check: business quotes are often subject to change until the supplier validates meter data, credit status and contract start date. Treat any “from” figures as estimates until confirmed in writing.

Two realistic scenarios (with numbers and assumptions)

Scenario A: single-site café choosing fixed vs rolling

Assumptions (illustrative): Electricity use 18,000 kWh/year; standing charge 60p/day. Option 1 fixed at 28.0p/kWh for 24 months. Option 2 rolling currently 30.0p/kWh, but supplier raises it to 33.0p/kWh after 6 months. (VAT/CCL ignored for simplicity.)

  • Fixed estimated annual energy: 18,000 × £0.28 = £5,040
  • Standing charge: 365 × £0.60 = £219
  • Total (fixed): ~£5,259/year
  • Rolling estimated annual energy: (6/12 × 18,000 × £0.30) + (6/12 × 18,000 × £0.33) = £5,670
  • Total (rolling): ~£5,889/year

In this scenario, fixed is cheaper and more predictable. Rolling could still make sense if the business expects to move soon and wants to avoid potential exit fees.

Scenario B: small manufacturer considering flexible procurement

Assumptions (illustrative): Electricity use 220,000 kWh/year (HH). Option 1: 12-month fixed at 24.5p/kWh. Option 2: flexible where 60% is hedged at 23.5p/kWh, 40% remains floating and averages 26.5p/kWh over the year due to market moves. Standing charge assumed £1.20/day for both. (Other HH cost components vary by supplier and are not modelled.)

  • Fixed estimated annual energy: 220,000 × £0.245 = £53,900
  • Flexible blended rate: (0.60 × 23.5p) + (0.40 × 26.5p) = 24.7p/kWh
  • Flexible estimated annual energy: 220,000 × £0.247 = £54,340
  • Standing charge: 365 × £1.20 = £438

Here, flexible procurement costs slightly more because part of the volume was left exposed. Flexible can still be valuable for governance (spreading buying decisions) and risk management—provided you have a defined strategy and reporting.

These examples are simplified to show how contract structure changes risk. Real bills include additional components and may treat some charges as pass-through.

Business energy contract types UK: FAQs

Are business energy contracts covered by the energy price cap?

No. The Ofgem price cap applies to domestic default tariffs, not most business energy contracts. That’s why comparing contract structure, term and fees matters.

What happens if my business moves into new premises without a contract?

You’ll usually be supplied on a deemed contract by the existing supplier for that meter. Take opening readings, identify the supplier and MPAN/MPRN quickly, then compare fixed/rolling options to avoid paying deemed rates longer than necessary.

Can I switch business energy supplier before my contract ends?

Often yes, but early termination fees may apply on fixed contracts. If you’re considering switching mid-term, check the exit fee calculation and whether your supplier offers a transfer/relocation process if you’re moving premises.

What’s the difference between a variable tariff and out-of-contract rates?

A variable/rolling contract is an agreed contract type with a pricing mechanism that can change. Out-of-contract (or deemed) rates are typically default rates applied when you haven’t agreed a new contract (e.g., after end date or at move-in). Out-of-contract rates are frequently less competitive.

Do I need a smart meter to get a good business energy deal?

Not always. Many suppliers can quote with traditional meters, but smart/AMR/HH data can improve accuracy—especially for larger sites where usage varies across the day. Availability and pricing depend on meter type, settlement and supplier appetite.

What contract length is best for an SME?

It depends on your risk appetite and tenancy horizon. A 12–24 month fixed contract is common for SMEs because it balances budgeting certainty with not being locked in for too long. Longer terms can improve certainty but may increase the cost of exiting early.

Can my business pay 5% VAT on energy?

Some non-domestic customers may qualify for reduced VAT depending on usage and circumstances, but many businesses pay 20%. If you think you qualify, check the rules and speak to your supplier/accountant before assuming 5%.

What information do I need to compare business energy contracts?

Ideally: MPAN (electricity) / MPRN (gas), annual kWh (or recent bills), current supplier, contract end date, payment method preference, and whether you have HH/AMR/smart metering. The more accurate the inputs, the more accurate the quotes.

Trust, methodology and sources

Editorial accountability

How we assess business energy contract types

This guide is designed to help UK businesses choose an appropriate contract structure before requesting quotes. We assess each contract type across:

  • Price certainty: how predictable your unit rates and costs are over time
  • Flexibility: ability to change supplier or adapt to occupancy changes
  • Operational fit: metering (HH/NHH), data requirements, and admin overhead
  • Risk allocation: who carries wholesale price risk and forecasting risk
  • Common UK frictions: deemed supply, notice windows, termination fees, and VAT/CCL considerations

Limitations: Supplier terms vary and change. Quotes depend on your meter data, consumption, sector, credit position, payment terms, and contract start date. The scenarios on this page are illustrative and do not include every bill component.

Sources (UK)

We also use supplier terms and industry standard definitions where applicable; these can vary by supplier and customer segment.

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Updated on 20 May 2026