Business energy contract types in the UK (small business guide)
Understand fixed, variable, deemed and flexible business energy contracts—what they mean for your bills, risk, and switching. Built for UK SMEs with practical examples, pitfalls to avoid, and a quote form to compare whole-of-market options.
- Clear definitions of each contract type (and when you’ll be put on one automatically)
- Realistic SME scenarios with estimated numbers and assumptions
- Decision checklist + comparison table for faster choices
Estimates and availability vary by supplier, meter type, credit checks and region. We’ll ask for a few details to show suitable options—no obligation.
Fast answer: Business energy contract types UK small business
The most common business energy contract types UK small business owners use are fixed-term, variable, deemed and flexible/flexi contracts; for most SMEs, a 1–3 year fixed contract is the typical choice because unit rates are agreed for the term, while variable and deemed rates can change and are often higher.
Key takeaway 1
If you’ve moved premises or your contract ended, you may be on a deemed or out-of-contract variable tariff—usually worth reviewing quickly.
Key takeaway 2
Contract suitability depends on your meter type (half-hourly vs non-half-hourly), usage pattern, credit position, and appetite for price movement.
Key takeaway 3
Always check the full cost picture: unit rate, standing charge, contract length, renewal terms, and exit fees (where applicable).
Important: Business energy is regulated differently from domestic. Prices and terms can be individually negotiated, and not all small businesses receive the same protections. If you’re unsure of your rights, start with Citizens Advice guidance on business energy and the Ofgem overview.
Business energy contract types explained (UK SMEs)
Below are the contract types you’ll see most often when comparing business electricity and gas. Names can vary by supplier, but the underlying structure is usually the same.
1) Fixed-term (fixed price) business contract
You agree a unit rate (p/kWh) and standing charge for a set term (commonly 12, 24 or 36 months). You generally pay by Direct Debit, variable Direct Debit, or on receipt of invoice depending on supplier and credit status.
- Best for
- Budget certainty and stable cash-flow planning.
- Watch outs
- Early exit fees can apply; renewal terms may move you to higher rates if you do nothing.
2) Variable (out-of-contract) business tariff
Rates can change—often with notice—based on the supplier’s pricing. You may land on this if your fixed deal ends and you haven’t renewed, or if you’ve never agreed a fixed term.
- Best for
- Short stop-gap periods (e.g., awaiting a meter change or moving premises).
- Watch outs
- Budget uncertainty; variable rates can be materially higher than a negotiated fixed rate.
3) Deemed contract (when you move in)
A deemed contract applies when you take responsibility for a premises’ energy supply but haven’t agreed terms with a supplier yet (common after moving into new commercial premises). Rates and terms are set by the existing supplier until you sign a new contract or switch.
- Best for
- It’s not really “best for”—it’s an automatic default so the lights stay on.
- Watch outs
- Often higher rates; don’t assume you’re on a competitive deal.
4) Flexible / flexi / pass-through (often for larger or HH sites)
Flexible contracts can allow you to “buy” energy in blocks over time, or have more direct exposure to wholesale and non-energy costs. They’re more common for higher usage, multi-site portfolios, and half-hourly (HH) metered supplies.
- Best for
- Businesses with the time/skill (or support) to manage risk and procurement timing.
- Watch outs
- More complexity; not always suitable for small single-site SMEs.
Terminology note: Some suppliers use “evergreen”, “rolling”, or “default” to describe out-of-contract variable arrangements. Always ask for the exact unit rate, standing charge, contract length and whether prices can change mid-term.
Compare business energy contract types with a tailored quote
Different contract types suit different SMEs. If you share a few basics, we’ll match you with suitable tariff structures based on your meter and usage profile—then you can decide whether you want fixed certainty or more flexibility.
What you’ll need (2 minutes)
- Business postcode and contact details
- Rough annual usage (if you know it) or your latest bill
- Meter points: MPAN (electric) / MPRN (gas) helps but isn’t essential
We won’t claim guaranteed savings. Quotes depend on supplier appetite, payment method, credit checks, meter type (including half-hourly) and current market conditions.
Get your business energy quote
Two realistic SME scenarios (with estimated numbers)
These examples show how contract type can affect risk and budgeting. They’re illustrative only and exclude VAT and any site-specific charges; actual rates and standing charges vary by supplier, region and meter profile.
Scenario A: Small café (electricity-only)
- Assumptions: 18,000 kWh/year, non-half-hourly meter, standing charge 55p/day.
- Fixed contract illustration: 26p/kWh for 24 months.
- Estimated annual energy cost: (18,000 × £0.26) + (365 × £0.55) ≈ £4,680 + £201 = £4,881/year.
- Why it suits: predictable monthly budgeting during seasonal trading swings.
If you’re currently on a deemed or variable rate that changes, the same usage could cost more or less—this scenario demonstrates certainty, not guaranteed savings.
Scenario B: Light industrial unit (electric + gas)
- Assumptions: Electric 65,000 kWh/year at 24p/kWh, gas 120,000 kWh/year at 7p/kWh.
- Standing charges (illustrative): electric 70p/day, gas 45p/day.
- Estimated annual cost: electric (65,000 × £0.24) + (365 × £0.70) ≈ £15,600 + £256 = £15,856; gas (120,000 × £0.07) + (365 × £0.45) ≈ £8,400 + £164 = £8,564; total ≈ £24,420/year.
- Contract thought: if usage is stable and cash-flow is tight, a fixed term may help; if you’re HH and have procurement support, a flex approach may be considered.
Numbers are rounded and for explanation only. Quotes may include additional charges or discounts depending on supplier and metering (including half-hourly settlement).
Comparison table: which contract type fits your small business?
Use this as a starting point. Final suitability depends on your usage pattern, contract end date, meter type, and whether you can pass costs through to customers.
| Contract type | Price certainty | Admin & complexity | Typical SME use-case | Main drawback |
|---|---|---|---|---|
| Fixed-term | High (agreed rates for term) | Low | Single-site SMEs wanting predictable outgoings | Exit fees / less flexibility if you move |
| Variable (out-of-contract) | Low (rates can change) | Low | Short stop-gap while arranging a fixed deal | Budget risk; can be uncompetitive |
| Deemed | Low–medium (supplier-set) | Low | Moving into new premises; supply continues automatically | Often higher rates; easy to overlook |
| Flexible / pass-through | Medium (depends on structure) | Higher | Higher-usage, HH metered, multi-site or managed procurement | Complexity; exposure to price movements |
Decision checklist (quick)
- Do you know your contract end date? If not, you may be renewing late or already out of contract.
- Are you moving premises soon? Shorter terms may reduce exit fee risk.
- How stable is usage? Stable usage tends to suit fixed budgeting; spiky usage may warrant extra review.
- Meter type: HH meters can unlock different contract structures and pricing.
- Payment method: Direct Debit vs invoice can affect quotes and supplier availability.
Who fixed contracts suit (and who they don’t)
Likely to suit
- Most single-site SMEs
- Cash-flow sensitive businesses
- Teams without time for procurement
May not suit
- Frequent movers / short leases
- Complex, HH-heavy portfolios
- Businesses seeking wholesale exposure
You can still use a fixed contract when moving—just factor in notice periods, contract terms and any fees for early termination.
Costs, exclusions and common pitfalls (UK business energy)
Small differences in wording can change the real cost of a contract. Here are the most common issues we see when SMEs review business energy agreements.
1) Standing charge vs unit rate
A lower unit rate can be offset by a higher standing charge (and vice versa). Compare the total annual cost estimate, not just p/kWh.
2) Renewal and “rollover” terms
Some suppliers move you to a default or variable rate if you don’t renew in time. Diary your end date and start reviewing early (often months ahead).
3) Early termination / exit fees
Fixed contracts often include fees if you leave early (e.g., moving out, closing, or switching). Ask how fees are calculated and when they apply.
4) Half-hourly (HH) metering
HH sites can be priced differently and may suit more flexible procurement. If you’re unsure, ask your supplier or check your bill for HH indicators.
5) Pass-through charges & non-energy costs
Some contracts bundle costs; others pass certain charges through separately. Make sure you know what’s included in the headline rate.
6) VAT and eligibility
Most business energy is charged at 20% VAT, but some may qualify for 5% (e.g., charities or certain use types). Check guidance on GOV.UK VAT rates.
If you’ve just moved in: Don’t wait for the first bill to act. Record opening meter readings, confirm who the current supplier is, and ask what deemed rates apply while you arrange a contract.
FAQs: business energy contract types (UK)
What is a deemed contract for business energy in the UK?
A deemed contract is the default arrangement that supplies energy when you’re responsible for a premises but haven’t agreed a new contract yet (often after moving in). The existing supplier sets the rates and terms until you sign a contract or switch.
What’s the difference between fixed and variable business energy contracts?
A fixed business energy contract agrees your unit rate and standing charge for a set term (such as 12–36 months). A variable (out-of-contract) tariff can change prices during your time on it, which can make budgeting harder and may cost more if rates rise.
Can a small business switch business energy contract before the end date?
Sometimes, but you may need to pay an early termination (exit) fee on a fixed contract. The fee rules vary by supplier and contract wording. If you’re moving premises or closing, ask the supplier how they calculate any charges before you commit.
How long are business energy contracts in the UK?
Many SMEs choose 12, 24 or 36 months, but shorter and longer terms exist. The best term depends on how long you’ll stay at the premises, your risk appetite, and what suppliers are offering for your meter type and credit profile at the time.
Do business energy contracts include VAT and other charges?
Quotes may be shown excluding VAT, and VAT is often 20% for business energy (some organisations or uses may qualify for 5%). Depending on contract structure, some charges may be bundled into the unit rate while others can be itemised—always confirm what’s included.
What information do I need to compare business energy contract types?
At minimum: business postcode, contact details, and an idea of annual kWh usage (or a recent bill). If you have them, MPAN (electricity) and MPRN (gas) help improve accuracy, especially where meters are half-hourly or the site has multiple meters.
Are flexible business energy contracts suitable for small businesses?
They can be, but many flexible contracts are designed for higher usage or half-hourly metered sites and involve more moving parts. If you want predictable costs and minimal admin, a fixed contract is usually simpler; if you have procurement support, flex may be considered.
What happens when my business energy contract ends?
If you don’t renew or switch, many suppliers move you onto an out-of-contract variable or default rate. Your supply won’t usually stop, but your prices can change and may be higher than a negotiated renewal—so it’s worth reviewing well ahead of the end date.
Trust, methodology and sources
Editorial trust signals
- Written by: EnergyPlus Editorial Team
- Reviewed by: Energy Specialist
- Last updated: July 2026
How we assess business energy contract types
We focus on what most affects small business outcomes: total cost predictability, exposure to price changes, ease of administration, and the most common routes SMEs end up on a contract (renewal, out-of-contract, or moving into new premises).
- Assumptions used in examples: Standard single-rate kWh pricing, simple standing charges, and stable annual consumption.
- What we don’t assume: Guaranteed savings, universal supplier availability, or identical pricing for all businesses.
- Limitations: Business energy pricing can be bespoke and may vary by region, meter type (including HH), settlement arrangements, credit checks, payment method, and contract start date.
Sources (UK)
- Citizens Advice: Business energy
- Ofgem: Energy regulator (information and guidance)
- GOV.UK: VAT rates on goods and services
We link to external sources for consumer/regulatory context. Your supplier contract always takes precedence for specific fees, notice periods and renewal rules.
Ready to choose the right contract type for your business?
Tell us your postcode and contact details and we’ll help you compare suitable business energy contract options—fixed, variable or flexible—based on your meter and circumstances.
No misleading promises—quotes are estimated and depend on supplier terms, meter data and eligibility.
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