Deemed Tariff Rates 2026: How to Avoid Overpaying for Business Energy Quick answer
Deemed tariff rates are rolling 28-day energy arrangements automatically applied when a business does not have an active contract, and they are typically the most expensive tariffs, reflecting supplier risk and uncertainty. Switching to a fixed, variable, or negotiated contract can save hundreds or thousands of pounds annually, improve budgeting, and open up greener energy options.
If you would like to read more information or learn more about the pricing of business energy, you can do so here .
Contents
Deemed Tariff Rate Comparison
Why Are Deemed Rates More Expensive?
Importance of Switching
How to Identify and Switch from a Deemed Rate Contract
Pros of Deemed Rate Tariffs
Cons of Deemed Rate Tariffs
How do we work?
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Authored by: Ally Cox (Business Technology & B2B Services Specialist 10+ Years’ Experience)
Reviewed by: James Ward (Telecoms Specialist, 12+ Years Experience)
Last Updated: March 2026
Key Takeaways
Deemed rates are temporary and costly, best treated as an emergency stopgap.
Businesses often pay 20-50% more than market rates on deemed tariffs.
Identifying your tariff early allows for a switch to a fixed or variable contract.
Switching can unlock renewable energy options and align with sustainability goals.
Rolling 28-day contracts carry high unpredictability, making budgeting difficult.
Energy Type Typical Deemed Rate Price Market Average Fixed Rate Difference
Electricity
36–40p/kWh
22–28p/kWh
+40–60%
Gas
7–9p/kWh
4–6p/kWh
+50–75%
Deemed Tariff Rate Comparison
Tariff Type Price Risk Term Best For
Deemed Rate 💷 High
🔴 Very high- prices may spike
Rolling 28-day
Emergency use or short transition periods
Fixed Rate 💷 Locked for duration
🟢 Low- price stability
1–3 years
Budget-conscious or long-term planning businesses
Variable Rate 📉📈 Market-driven
🔴 High-prices fluctuate
No fixed term
Businesses accepting risk for potential savings
Out-of-Contract 💷 Higher than normal
🔴 High-no set pricing
Rolling until switched
Temporary stopgap when no contract is active
Rollover Contract 🔁 Same terms auto-renewed
🟡 Moderate – if previous rate ok
Typically 12 months
Those content with existing rates (but risky)
Why Are Deemed Rates More Expensive? Suppliers apply higher charges for deemed rates due to the uncertainty around your usage and commitment:
🧾 They don’t know your business’s energy consumption patterns.
📉 Without a contract, they treat you as a higher-risk customer.
💡 Rates are adjusted to cover that unpredictability and administration.
Even though Ofgem regulations require that deemed rates are not “unduly onerous”, this language is broad and subjective ,so prices are often well above market average .
Importance of Switching Remaining on a deemed tariff can cost your business hundreds or even thousands of pounds more per year , particularly if you’re a high-usage organisation.
📊 In 2026, government statistics still show that many small businesses fail to switch , simply due to a lack of awareness.
✅ Switching to a fixed or negotiated deal can:
Slash your energy bills 💷
Help you budget more accurately 📅
Open up access to greener tariffs 🌱
How to Identify and Switch from a Deemed Rate Contract If you’ve just moved into a new property or never finalised an energy deal, here’s what to do:
Check your latest bill or welcome letter – if the words “deemed”, “out-of-contract”, or “default” appear, you’re on one!Contact your supplier -Ask about your current tariff and explore fixed-rate options.Compare the market -Use a broker or energy comparison site to secure a better deal quickly.Switch over the phone -Business energy contracts usually require phone sign-up, as they involve more variables than domestic ones.
💡 Tip: Make switching a priority within your first week of occupancy to avoid unnecessary costs.
Pros of Deemed Rate Tariffs
Immediate energy supply as soon as you move into your premises No long-term commitment, giving you complete flexibility to start/stop as you wish. Ofgem regulations ensure that prices are not ‘excessively high’
Cons of Deemed Rate Tariffs
Typically among the most expensive tariffs available No opportunity to negotiate better rates or terms, often resulting in less favourable conditions. Monthly rates can increase, making it harder to predict and manage your energy costs. Without proactive management, you’re likely to overpay for energy compared to negotiated contracts.
🧠 Final Thoughts for 2025 Deemed tariffs may keep your lights on, but they’ll burn a hole in your budget 🔥
They should be viewed as temporary safety nets, and not long-term solutions. If your business finds itself on a deemed rate contract in 2025, act fast. Switching to a tailored business energy deal can save money, reduce stress, and improve financial stability.
Read more here:
Ofgem
Citizens Advice
Uswitch for Business
FAQs – Deemed Tariff Rates 2026 1. What is a deemed tariff?
A deemed tariff is a default 28-day energy contract applied when no formal contract exists, often the most costly option.
2. Can small businesses avoid deemed rates?
Yes. By actively securing a fixed or variable contract, businesses can prevent falling onto a deemed rate.
3. Are deemed rates regulated?
Yes. Ofgem ensures they are not “unduly onerous”, but prices can still be significantly higher than standard tariffs.
4. How much can I save by switching?
Switching can save 20-50% compared to deemed rates, depending on your consumption and chosen contract.
5. Do deemed rates allow renewable energy options?
Rarely. They are typically standard tariffs, so switching is required to access green energy plans.
6. How quickly should I switch off a deemed tariff?
Ideally within the first week of occupancy or contract expiry to minimise unnecessary costs.
7. Can I negotiate with my supplier while on a deemed rate?
Most suppliers allow negotiation, but it’s usually better to switch to a fixed contract for stability and cost savings.
Here is a Video About Deemed Tariff Rates
Related Business Energy Guides Compare & Switching Guides Sector-Specific Energy Guides Tariffs, Pricing & Market Explained Meters, Technical & Admin Guides Green & Renewable Energy Options Major UK Business Energy Suppliers Cost Reduction & Strategy Market & Government Updates Hi, I’m Ally Cox , a senior copywriter and blogger at CompareYourBusinessCosts.co.uk, the UK’s trusted platform for comparing business services.over a decade of experience in the B2B sector, I specialise in simplifying complex topics like leased lines, VoIP, business energy, HR and payroll solutions, accounting software, and EPOS systems .HR, copywriting, and business operations- from clocking-in systems to card machines and office technology .informed, confident decisions when choosing products and services that improve efficiency and save money.
