Business Energy Bill Calculator UK 2026: Estimate Electricity & Gas Costs Quick answer
Business energy bills are based on how many kWh of electricity and gas your business uses, your unit rates, standing charges, VAT, contract type and supplier terms. Unlike domestic energy customers, businesses are not protected by the household energy price cap, so comparing business energy quotes before your contract renews can make a big difference.
Use our business energy bill calculator below to estimate your monthly electricity cost, gas cost, annual bill and potential savings from switching supplier.
👉 Compare energy deals and save up to 45%
Business Energy Bill Calculator UK Estimate your monthly and annual business electricity and gas costs using your kWh usage, unit rates, standing charges and VAT.
Business type
Office Retail shop Restaurant Café / coffee shop Pub / bar Salon / clinic Warehouse / industrial Hotel / guesthouse Manufacturing / high usage Used to provide a recommendation after the calculation.
Contract status
Fixed contract Contract ending soon Out of contract / deemed rate Not sure Out-of-contract rates can be much more expensive.
VAT rate
0% 5% 20% Most businesses should check their VAT treatment with their supplier or accountant.
Months until contract ends
Already ended / out of contract 1 month 3 months 6 months 12+ months Businesses often compare quotes before renewal.
Need renewable / green energy?
No Yes Green tariffs may affect supplier choice and pricing.
Your estimated business energy bill
Monthly electricity cost
£0
Estimated monthly bill
£0
Average effective rate
0p/kWh
Potential monthly saving
£0
Enter your energy usage and rates to estimate your business energy bill.
Recommendation will appear here.
This calculator is an estimate only. Actual business energy bills vary by supplier, meter type, region, contract, usage, VAT treatment, standing charges, Climate Change Levy, pass-through charges and renewal terms.
Key takeaways
Business energy bills are mainly based on kWh usage, unit rates and standing charges.
Businesses are not protected by the domestic energy price cap.
Out-of-contract or deemed rates can be more expensive than agreed fixed business tariffs.
Small differences in pence per kWh can create large annual cost differences for high-usage businesses.
Compare quotes before your contract renewal date to avoid being moved onto poor-value terms.
How to calculate a business energy bill To estimate your business energy bill, multiply your electricity and gas usage by your unit rates, then add standing charges, VAT and any other supplier charges.
Bill item How it works Why it matters
Electricity unit rate
Charged per kWh used
Usually the biggest part of an electricity bill
Gas unit rate
Charged per kWh used
Important for heating, cooking, hot water and production
Standing charge
Daily fixed charge
Applies even if usage is low
VAT
Added depending on business and usage circumstances
Can increase the total bill shown on invoices
Other charges
Supplier, meter, pass-through or admin costs
Can affect the final monthly bill
Business energy cost by business type
Business type Main energy use What to compare
Office
Lighting, computers, heating, cooling
Electricity unit rate, standing charge and contract renewal date
Retail shop
Lighting, tills, heating, refrigeration
Opening hours, electricity usage and fixed charges
Café
Cooking, refrigeration, hot water, coffee machines
Gas and electricity together
Restaurant
Cooking, extraction, refrigeration, heating
High gas and electricity usage
Pub or bar
Cellar cooling, lighting, refrigeration, heating
Electricity usage, gas usage and renewal timing
Salon or clinic
Heating, hot water, lighting, appliances
Electricity and gas rates, especially with long opening hours
Warehouse
Lighting, equipment, heating, machinery
High electricity usage and meter type
Manufacturing
Machinery, process heat, lighting, production
High usage, contract structure and half-hourly meter options
Business electricity vs business gas costs
Energy type Usually used for What to check
Business electricity
Lighting, IT, refrigeration, equipment, machinery
Unit rate, standing charge, meter type and usage pattern
Business gas Heating, cooking, hot water and production heat
Unit rate, standing charge, seasonal usage and contract term
Dual fuel Businesses using both electricity and gas
Whether separate suppliers or dual fuel quotes are cheaper
When should you compare business energy quotes? You should compare quotes if:
your contract ends in the next 1–6 months
you are on out-of-contract or deemed rates
your latest bill has increased sharply
your business usage has changed
you have moved premises
you have opened a new site
you use more electricity or gas than before
you want renewable or green energy
your supplier has sent a renewal notice
you do not know your current unit rates
👉 Compare energy deals and save up to 45%
How to reduce business energy bills
Compare quotes before your current contract ends.
Check whether you are on out-of-contract rates.
Use actual kWh usage from your latest bill.
Compare both unit rates and standing charges.
Review your opening hours and usage patterns.
Switch off equipment when not needed.
Upgrade inefficient lighting or refrigeration.
Check whether a smart meter could improve usage visibility.
Avoid renewing without comparing alternative suppliers.
What to check before choosing a business energy supplier
What is the electricity unit rate?
What is the gas unit rate?
What are the daily standing charges?
Is the contract fixed or variable?
How long is the contract?
Are there exit fees?
What happens at the end of the contract?
Are prices fully fixed or can charges change?
Is VAT shown clearly?
Are other charges included?
Is green energy available?
How does billing work?
Can the supplier support your meter type?
What customer support is available?
Why compare business energy quotes? Business energy prices are not one-size-fits-all. Two businesses with similar usage can receive different quotes depending on contract timing, location, meter type, credit profile, supplier appetite and wholesale market conditions.
Comparing quotes helps you check:
electricity unit rates
gas unit rates
standing charges
contract length
renewal options
out-of-contract risk
green energy options
supplier terms
estimated annual cost
Why compare with Compare Your Business Costs? Compare Your Business Costs helps UK businesses compare electricity and gas quotes based on usage, contract status, business type and supplier requirements.
You can compare:
business electricity quotes
business gas quotes
dual fuel business energy
micro business energy
small business energy
restaurant energy quotes
office energy quotes
retail energy quotes
warehouse energy quotes
green business energy
Verdict: how much will your business energy bill cost? Your business energy bill depends mainly on kWh usage, unit rates, standing charges, VAT, contract type and supplier terms. The more energy your business uses, the more important even small unit rate differences become.
Final recommendation: use the calculator above to estimate your monthly and annual bill, then compare business energy quotes before your contract renewal date.
FAQs: business energy bill calculator
How do I calculate my business energy bill?
Multiply your electricity and gas usage by your unit rates, then add standing charges, VAT and any other monthly charges shown on your bill.
Are businesses protected by the energy price cap?
No. The domestic energy price cap does not protect non-domestic business energy contracts.
What is a business energy unit rate?
A unit rate is the price you pay for each kWh of electricity or gas your business uses.
What is a business energy standing charge?
A standing charge is a daily fixed charge for having an electricity or gas supply, regardless of how much energy you use.
Why has my business energy bill gone up?
Your bill may increase because of higher usage, higher unit rates, higher standing charges, contract expiry, out-of-contract rates or changes in supplier terms.
When should I compare business energy quotes?
You should compare quotes before your contract ends, especially if your renewal window is open or you are on deemed or out-of-contract rates.
Can I switch business energy supplier at any time?
It depends on your contract. Some fixed business energy contracts have exit terms or renewal windows, so check your agreement before switching.
Is business gas cheaper than business electricity?
Gas unit rates are often lower than electricity unit rates, but total cost depends on how much you use, standing charges and contract terms.
Do I need my annual kWh usage to compare quotes?
It helps. Suppliers usually quote more accurately when you provide annual or monthly kWh usage from a recent bill.
Can I compare business energy quotes for free?
Yes. You can compare business electricity and gas quotes based on your usage, contract status and business type.
How do we work?
Transparent, impartial, and data‑driven reviews made by a team of expert humans, never AI generated – here’s exactly how Compare Your Business Costs helps you find the best deals from trusted UK providers: click here
Authored by: Ally Cox (Business Technology & B2B Services Specialist 10+ Years’ Experience)
Reviewed by: James Ward (Telecoms Specialist, 12+ Years Experience)
Last Updated: July 2026
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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.
