Business energy deemed rates comparison (UK guide)

Understand what deemed rates are, why they’re often higher, and how UK businesses can move onto a negotiated contract. Compare typical structures, charges and pitfalls—then request whole-of-market quotes.

  • Clear, UK-specific explanation of deemed electricity & gas rates (and when they apply)
  • What to check: standing charge, unit rate, pass-throughs, VAT & CCL
  • Two realistic cost scenarios with worked numbers (with assumptions)
Get business energy quotes How deemed rates work

Deemed rates and availability vary by supplier, meter type and circumstances. Quotes are subject to credit checks and supplier acceptance.

Business energy deemed rates (UK): the fast answer

A deemed rate is the tariff a business is placed on when it’s taking supply but doesn’t have an agreed contract with the current supplier. In practice, deemed rates are usually more expensive than negotiated fixed contracts, and they can change in line with the supplier’s published deemed tariff.

Important: deemed rates are different from domestic “deemed contracts” and different from a business variable contract you actively agreed to. The key point is whether you have explicitly agreed terms with the supplier for that meter.

Key takeaways

  • Deemed applies by meter (MPAN/MPRN), not by your business as a whole.
  • Cost is driven by unit rate (p/kWh) + standing charge (p/day) + potential pass-through charges.
  • If you’ve moved into new premises, you can often agree a contract with the incumbent or switch—but you’ll still owe charges for energy used while on deemed.
  • To compare properly, gather your annual kWh, meter type (HH or non-HH), payment method, and site postcode.

Quick next step

If you’re on deemed, the quickest way to reduce uncertainty is to get contract options (fixed or flexible, depending on usage) and check:

  • Whether your meter is half-hourly (HH)
  • Your contract end date (if any) and any termination notice rules
  • Your current supplier and meter IDs (MPAN/MPRN)

You can request quotes below—no obligation.

Compare business energy deals to move off deemed rates

If you’re on deemed rates (or think you might be), we’ll help you compare whole-of-market options where available for your meter type and usage. We’ll also sense-check whether you’re likely to need a microbusiness style contract or a more tailored arrangement.

What you’ll need

  • Business postcode(s)
  • Rough annual spend or kWh (if known)
  • Current supplier (if known)
  • Meter type (smart/HH if known)

What we won’t do

  • No “guaranteed savings” claims
  • No hidden fees added to your bill
  • No pressure to switch on the first call

Tip for new tenants: if you’ve just moved in, take a meter reading (or photo) and confirm the move-in date. It helps avoid billing disputes while you arrange a contract.

Get quotes (whole-of-market)

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When deemed rates apply (and why businesses end up on them)

Common triggers

  • New tenancy / new occupancy (you move in and start using energy before agreeing a contract)
  • Contract ended and a new contract wasn’t agreed in time
  • Incorrect or missing transfer details during a switch (e.g., meter IDs, read disputes)
  • Business purchase / change of legal entity where the supplier needs new terms

What it usually means for your bill

  • You’ll be billed on the supplier’s published deemed tariff for that meter
  • Pricing is typically not fixed (it can change with notice, depending on terms)
  • You still pay standing charges even with low usage
  • You may see extra line items (for certain meter types and network areas)

Microbusiness note: If your business meets microbusiness criteria, additional protections may apply (for example, around contract terms and information). However, deemed rates can still apply—so it’s worth confirming your status and options.

Deemed rates vs other business energy options (comparison)

Use this table to compare the typical features that matter for UK businesses. Exact pricing and terms vary by supplier, meter type (HH/non-HH), and your network area.

Option How you get onto it Price certainty Typical risks / watch-outs Who it can suit
Deemed rates You take supply without agreeing a contract (e.g., move-in, contract lapse). Low. Rates may change per supplier terms. Often higher unit/standing charge; may include pass-throughs; admin friction resolving start reads. Short-term only while you arrange a contract.
Fixed contract (1–3 years) You agree terms with a supplier directly or via comparison. Medium–high (depending on what’s fixed vs pass-through). Early exit fees; rollover/renewal windows; check what’s included (e.g., network charges). Most SMEs wanting budget control.
Business variable / out-of-contract You agree variable terms, or your fixed ends and moves to variable terms (varies). Low. Rates can change with notice. Price volatility; can drift higher than competitive fixed deals. Very short-term flexibility (with careful monitoring).
Flexible / pass-through heavy (often HH) More tailored contracts, sometimes for larger usage or HH meters. Varies. Some components fixed, others variable. Complex bills; requires active management; imbalance and DUoS/triad-like considerations may apply historically/depending on structure. Larger SMEs with capacity to manage energy strategy.

Decision checklist: is switching off deemed urgent?

  • Your unit rate or standing charge looks high vs similar sites
  • You’ve had a change of tenancy/entity and billing is unclear
  • You need predictable cashflow (budgeting/forecasting)
  • You’re worried about rate changes mid-quarter

Who deemed rates might suit (briefly)

Usually, only as a short stop-gap:

  • Pop-up premises with genuinely short occupancy
  • Sites awaiting meterworks (e.g., new connection) where contract timing is uncertain

Even then, it’s worth checking whether a short fixed term is available.

Two realistic cost scenarios (with assumptions)

These examples are illustrative to help you understand how deemed costs can stack up. They are not quotes. We assume single-rate supply and ignore any meter-specific extras unless stated. VAT/CCL depend on eligibility and billing configuration.

Scenario A: small office on deemed electricity

Annual usage (assumed)
12,000 kWh
Deemed unit rate (assumed)
32p/kWh
Deemed standing charge (assumed)
70p/day

Estimated annual energy cost (ex-VAT):
12,000 × £0.32 = £3,840
365 × £0.70 = £255.50
Total ≈ £4,096

If a fixed deal were 24p/kWh and 55p/day (illustrative), the same usage would be ≈ £2,880 + £200.75 = £3,081 (ex-VAT). Terms vary.

Scenario B: small restaurant on deemed gas

Annual usage (assumed)
80,000 kWh
Deemed unit rate (assumed)
10.5p/kWh
Deemed standing charge (assumed)
95p/day

Estimated annual energy cost (ex-VAT):
80,000 × £0.105 = £8,400
365 × £0.95 = £346.75
Total ≈ £8,747

A contract might also include pass-through elements (e.g., certain network-related charges) depending on meter type and supplier structure.

Reality check: your actual bill depends on your exact tariff, site class, consumption shape (especially for HH), network region, reads, and whether charges like CCL and VAT are applied. Use these examples to understand the mechanics—not as a prediction.

Hidden costs, exclusions and common pitfalls (UK)

Deemed rates aren’t just about a higher p/kWh. The details that change the total cost are often in the small print or in the way charges are presented on the bill.

Standing charges add up

Low usage sites can still face meaningful costs from daily charges—especially if a site is closed seasonally.

Pass-through charges (some contracts)

Some business contracts (often for HH) separate out network and policy charges. Compare like-for-like: “all-in” vs pass-through.

VAT and CCL assumptions

Most businesses pay VAT (often 20%), but some qualify for reduced rates. Climate Change Levy (CCL) may apply depending on supply and eligibility.

Common pitfalls to avoid

  • Not taking move-in reads (leads to disputes over who used what)
  • Ignoring meter type (HH vs non-HH changes what contracts fit)
  • Comparing unit rate only and missing standing charge and extras
  • Assuming you can cancel freely (some contracted rates have termination windows and fees)
  • Forgetting multi-site needs (each MPAN/MPRN may need separate pricing)

What to check on your current bill

  • Tariff name (does it say “deemed”, “out of contract”, or similar?)
  • MPAN/MPRN and meter serial number
  • Unit rate(s) (single, day/night, or multiple bands)
  • Standing charge and billing period length
  • Any lines labelled DUoS, capacity, reactive, or other network items (more common for HH)

If you’re disputing a deemed bill: keep a timeline (move-in date, tenancy agreement start, meter reads, supplier contact). If you can’t resolve it, you may be able to escalate via the supplier’s complaints process and relevant ombudsman routes, depending on your business type and circumstances.

FAQs: business deemed rates in the UK

1) How do I know if my business is on deemed rates?

Check your bill for wording like “deemed”, “out of contract”, or a tariff that you don’t recognise/never agreed to. If you’ve recently moved in and haven’t signed a contract yet, you may be on deemed by default with the incumbent supplier for that meter.

2) Are deemed rates capped for businesses?

Business energy pricing is not the same as the domestic price cap. Some protections may apply for microbusinesses and for specific situations, but in general deemed prices are set by suppliers’ published tariffs and can vary by region and meter type.

3) Can I switch supplier if I’m on deemed rates?

Often yes, but it depends on the supplier, your meter details, and whether there are any objections (for example, if there’s an unresolved debt attached to the meter or registration issues). You’ll still be responsible for paying for energy used up to the switch date.

4) I’ve just moved premises—what should I do first?

Take dated meter reads (photos help), find out who the current supplier is, and contact them to register your occupancy. Then compare contracts and agree one as soon as practical to reduce time on deemed rates.

5) What’s the difference between deemed rates and a rollover contract?

A rollover typically happens when a contract ends and renews onto another tariff under pre-agreed terms (rules vary, and microbusinesses have extra protections). Deemed is when there are no agreed contract terms for the supply you’re taking.

6) Do deemed rates include VAT and Climate Change Levy (CCL)?

Rates are usually quoted excluding VAT. VAT is added on bills according to your business status/eligibility. CCL may apply and is typically shown as a separate line item. Always confirm what’s included when comparing offers.

7) I have a smart meter—does that stop deemed rates?

No. A smart meter can improve read accuracy, but deemed rates relate to contract status, not the meter itself. Your meter type can affect what tariffs you’re offered and how charges are structured.

8) What details help you quote accurately?

Best is annual kWh (or a recent bill), plus your MPAN/MPRN, meter type (HH/non-HH), and site postcode. If you don’t have kWh, we can start with what you know and refine.

Trust, methodology and sources

Page details

Last updated
April 2026

How we assess deemed rates comparisons (our methodology)

Our aim is to help UK business owners compare options fairly and avoid common billing surprises. When we explain or compare deemed rates, we focus on the cost drivers that typically change the outcome:

  • Total cost structure: unit rate + standing charge, and whether charges are “all-in” or pass-through.
  • Meter type: non-HH vs HH (often changes tariff availability and bill complexity).
  • Network region: distribution areas can affect standing charges and network components.
  • Business status: microbusiness criteria may affect information/contracting protections.
  • Usage pattern: not just annual kWh—when you use energy matters for some tariffs.

Limitations: deemed tariffs are published by suppliers and can change; suppliers’ acceptance criteria (including credit checks) vary; and some charges depend on industry-wide parameters. For that reason, we provide illustrative scenarios and encourage bill-based quoting for accuracy.

Sources (UK)

  • Ofgem (UK energy regulator) — guidance on business energy and consumer protections.
  • Citizens Advice: energy — practical advice on billing, disputes and switching.
  • GOV.UK — business guidance and general regulatory information.

We also reference supplier tariff documents and contract terms during quoting, which vary by supplier and are provided at the point of offer.

Ready to move off deemed rates?

Request business energy quotes for your meter and usage. We’ll help you compare contract structures, not just headline p/kWh.

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Updated on 26 Apr 2026