August 2026, latest update
Wholesale vs Fixed Business Energy Prices UK 2026-Which Is Right for Your Business?
Wholesale vs fixed business energy prices in the UK is one of the most common questions we hear from business owners approaching contract renewal. Most guides on this topic show you a wholesale price chart and tell you to lock in before the market moves. The problem is the market moves constantly, so any figure quoted is out of date before you finish reading.
The more useful question is not what the wholesale price is today. It is how you structure your contract to protect your business from energy price volatility, whichever direction it moves next.
This guide explains the real difference between wholesale and fixed business energy pricing, what each type of contract actually means for your bills, and how to decide which approach fits your business in 2026.
What Are Wholesale Business Energy Prices?
Wholesale energy prices are the prices at which energy suppliers buy electricity and gas on the commodity markets, the exchanges and trading platforms where energy is bought and sold in bulk before it reaches your business.
These prices change every day, every hour, and sometimes every minute. They are driven by a complex set of factors including global gas supply and demand, weather patterns affecting renewable generation, geopolitical events, seasonal demand shifts, and the interconnectors that link the UK grid to European energy markets.
In 2026, wholesale energy markets remain unsettled. Gas prices are approximately double their pre-2022 historical averages despite falling significantly from the 2022 peak. Electricity wholesale prices follow gas closely because gas-fired power stations set the marginal price for electricity across the UK grid on most days. International tensions, including continued uncertainty in Middle Eastern energy supply routes, have added to this volatility throughout 2025 and into 2026.
The critical thing to understand about wholesale prices:
Wholesale costs account for approximately 36-40% of your total business electricity bill. The remaining 60-64% is non-commodity costs: network charges, levies, metering costs and supplier margin, which are largely fixed regardless of what the wholesale market does. This means that even a significant move in wholesale prices has a more moderate impact on your total bill than headlines suggest.
What Is a Fixed Business Energy Contract?
A fixed business energy contract locks your unit rate and standing charge at an agreed level for a set period, typically one, two, three or five years. Once the contract is signed, your rate does not change during that term regardless of what happens to wholesale prices.
This does not mean your bill stays the same every month; consumption naturally varies, but the price you pay per unit of energy is fixed. If wholesale prices rise sharply during your fixed term, you are protected. If they fall, you pay above the new market rate for the remainder of your contract.
What a fixed contract includes:
Your fixed rate incorporates the wholesale commodity cost at the time of purchase, the supplier’s forecast of non-commodity charges over the contract period, the supplier’s margin, and the broker’s commission. A reputable broker such as Kilowatt Energy discloses the commission element upfront before you sign anything.
What a fixed contract does not protect against:
Some non-commodity charges, particularly elements of TNUoS and DUoS, can be passed through to you during a fixed contract even if your unit rate is locked. This is why many businesses on fixed contracts still saw bills rise in April 2026 when TNUoS charges increased by approximately 60%. The commodity element of your rate was fixed, but the pass-through network charges moved independently.
What Is a Wholesale or Flexible Business Energy Contract?
A wholesale or flexible energy contract, sometimes called a pass-through contract, does not lock your rate in advance. Instead, your energy is purchased from the wholesale market in tranches over the course of the contract, and your unit rate reflects the actual market price at the time of each purchase.
This approach is typically only suitable for larger businesses spending £100,000 or more per year on energy. It requires active management either by a specialist energy manager or an experienced broker because the purchasing decisions made throughout the contract directly affect the price you ultimately pay.
When wholesale or flexible contracts work well:
If your business has significant energy consumption and can absorb some price volatility, flexible procurement can deliver a lower average cost than a fixed contract over a multi-year period but only if purchases are timed well. This is not a passive strategy.
When they do not work well:
For most SME restaurants, offices, retail premises, dental practices, and care homes, a flexible or wholesale-linked contract introduces more financial risk than the potential saving justifies. Budget certainty matters more for these businesses than marginal cost optimisation. Our client Alpine Service Station in Derby came to us having been advised into a complex procurement arrangement by a previous provider. We moved them onto a straightforward fixed contract, resolved outstanding billing issues, and saved them high costs.
Contract Length- The Decision That Matters More Than the Headline Rate
Whether you choose a fixed or flexible approach, the contract length you agree to has a bigger impact on your risk exposure than the wholesale price on the day you sign. Yet most businesses spend more time discussing the unit rate than the length of the commitment they are about to make.
12-month fixed contracts
A one-year fixed deal gives you certainty for 12 months and keeps you close to the market. You will reprice sooner, which suits you if you believe rates will fall but you also face the renewal decision again in 12 months. If the market has moved against you, your options are more limited. One-year contracts are typically more expensive per unit than longer-term contracts because the supplier assumes more short-term price risk.
Good for: businesses that expect significant changes, are moving premises, are expanding significantly, or are adding new equipment in the next 12-18 months.
Two to three year fixed contracts
The most common choice for UK SMEs. A two or three-year deal balances budget certainty against being locked in for an extended period. You get a lower unit rate than a one-year deal because the supplier can plan further ahead, and you avoid the renewal process for 24-36 months.
Good for: stable businesses with predictable consumption that want cost certainty without committing to a very long term.
Four to five year fixed contracts
The longest standard fixed terms available. These deliver the strongest budget certainty and the lowest unit rates; suppliers reward longer commitment with better pricing. The trade-off is that you give up any ability to benefit from a market fall during the contract period.
Good for: settled businesses with stable consumption that prioritise certainty above all else, are not planning major changes, and are not likely to move premises during the contract period.
The Hidden Risks of Longer Fixed Contracts
A longer fix is not risk-free. It trades market price risk for a different set of risks that are worth understanding before you sign.
Early exit costs
Leaving a fixed energy contract before the agreed end date almost always incurs an exit charge. The amount varies significantly between suppliers; some charge a flat fee, others charge based on the remaining value of the contract. Before committing to a three or five-year term, confirm the exit cost structure with your supplier and factor it into your decision.
Outgrowing the contract
A fixed contract is agreed based on your consumption profile at the time of signing. If your business grows significantly, opening new sites, adding equipment, extending operating hours, the rate agreed for a smaller consumption profile may no longer be optimal, and you are committed to it regardless.
Moving premises
Energy contracts are attached to a meter, not to a business. If you move premises during a fixed contract term, your existing tariff does not automatically transfer. Understanding the change of tenancy implications before signing a long-term deal is essential. We have helped multiple clients navigate exactly this situation, including one who moved commercial premises mid-contract and faced unexpected termination charges from their previous supplier.
Supplier financial stability
Less commonly considered but worth noting: if your supplier becomes financially distressed during a long contract, the arrangement with Ofgem’s Supplier of Last Resort (SoLR) typically places you on deemed rates while a new supply is arranged. For businesses on long fixed contracts, this disruption is an additional consideration.
What Happens If You Do Nothing at Contract End
This is where the most money is lost. If your business energy contract expires without a replacement in place, your supplier automatically moves you onto an out-of-contract or deemed rate.
These rates are set entirely by the supplier with no regulatory cap. In 2026, out-of-contract rates are typically 40-60% higher than the best available fixed rates. Some suppliers charge even more. Every day on a deemed rate is money spent that cannot be recovered; unlike billing errors, which can sometimes be claimed back, out-of-contract rate overpayments are simply lost.
The solution is straightforward. Start the renewal process at least 90 days before your contract end date. This gives you enough time to complete a proper commercial energy comparison, review options across multiple suppliers through a broker, and have a new contract in place before the existing one expires.
Kilowatt Energy diaries every client’s renewal date and makes contact 90 days before expiry as standard. Our clients do not roll onto out-of-contract rates because we prevent it from happening. Read more about out-of-contract business energy rates and how to escape them if you are already on one.
How Kilowatt Energy Approaches Energy Procurement
For most of our SME clients, the right answer to wholesale vs fixed business energy prices UK is a fixed contract, but the right length varies by business.
Here is how we assess this with each client:
We look at your consumption profile; not just the total annual figure but when you consume, how consistently, and what your peak demand is. A business with very consistent usage is a better fit for a long fixed term than one with seasonal peaks and troughs.
We review your business plans; if you are planning to expand, move or change operations in the next 12-36 months, a shorter term protects you from being tied in at the wrong time.
We check your current rate against the market; using live market data across 30+ suppliers. For clients with existing contracts that still have time to run, we check whether it is worth considering early exit based on the gap between your current rate and available market rates.
We disclose our commission; before any contract is agreed. You know exactly what we earn, and it does not influence which supplier or term length we recommend.
Our work with Popovic Properties, a 25-site commercial portfolio, involved exactly this kind of structured procurement analysis. By assessing each site individually, aligning contract renewal dates and securing competitive fixed rates across all 25 meters, we delivered £25,000 in annual savings. The right answer was not the same for every site; some warranted 2-year terms, others 3-year terms based on their individual circumstances.
How to Decide: Wholesale vs Fixed Business Energy Prices UK
Use these four questions to guide your decision:
What percentage of your overheads is energy?
If energy is a small slice of your costs, some market exposure through a shorter term or flexible arrangement is manageable. If energy is a significant overhead closer to 10% or more of total costs, the budget certainty of a longer fixed contract carries more weight.
How stable is your business?
A settled business with predictable consumption and no planned changes is a better candidate for a longer fixed term. A growing business adding sites or equipment has more to gain from flexibility.
How much administrative bandwidth do you have?
A flexible wholesale-linked contract requires active management. If you do not have a dedicated energy manager or experienced broker actively managing your purchasing decisions, the complexity of flexible procurement is likely to cost you more than it saves.
What is your risk tolerance?
Some business owners sleep better knowing their energy costs are fixed for three years. Others prefer to stay closer to the market. Neither approach is wrong; the right answer is the one that fits your specific circumstances and temperament.
Fixed vs Flexible: Summary Comparison
| Short Fixed (1yr) | Mid Fixed (2-3yr) | Long Fixed (4-5yr) | Flexible/Wholesale | |
|---|---|---|---|---|
| Budget certainty | 12 months | 24-36 months | 48-60 months | Variable |
| Unit rate level | Higher | Mid | Lower | Depends on market timing |
| Market exposure | After 12 months | After 2-3 years | After 4-5 years | Ongoing |
| Exit cost risk | Lower | Medium | Higher | Varies |
| Best for | Changing businesses | Most SMEs | Stable businesses | Large businesses £100k+ |
| Management needed | Minimal | Minimal | Minimal | Active/ongoing |
FAQ- Wholesale vs Fixed Business Energy Prices UK
What is the difference between wholesale and fixed business energy prices?
Wholesale prices are the live market prices at which energy suppliers buy gas and electricity on commodity exchanges; these change constantly based on global supply and demand. Fixed business energy prices are the rates agreed in your contract for a set period, typically one to five years. A fixed contract locks in your unit rate regardless of wholesale market movements during the term.
Which is cheaper, wholesale or fixed business energy?
There is no universal answer. A fixed contract signed at the right time can be cheaper than wholesale-linked pricing over the same period. A flexible contract managed well by an experienced broker can beat a fixed rate. What matters is timing, contract structure and whether you have the expertise to actively manage a wholesale-linked arrangement. For most UK SMEs, a well-timed fixed contract from a reputable broker delivers the best overall outcome.
How long should I fix my business energy for?
It depends on your consumption stability, business plans, and risk tolerance. Most SMEs are well-served by two- to three-year fixed contracts long enough for meaningful budget certainty, short enough to maintain flexibility. Businesses planning significant changes in the next 12-18 months should consider a shorter term. Settled businesses with stable consumption can consider longer terms for a lower unit rate.
What happens when my fixed business energy contract ends?
If you do not arrange a new contract before your current one expires, your supplier automatically moves you onto an out-of-contract or deemed rate. These rates carry no regulatory cap and are typically 40-60% higher than the best available fixed rates. Start your renewal process at least 90 days before your contract end date.
Can I exit a fixed business energy contract early?
Is a flexible or wholesale-linked energy contract suitable for my SME?
For most SMEs spending less than £100,000 per year on energy, the complexity and risk of a wholesale-linked contract outweigh the potential savings. Fixed contracts are simpler to manage and provide the budget certainty that small and medium businesses typically need. Flexible procurement is more appropriate for larger businesses with significant consumption and access to active contract management.
If your business is looking to get the best commercial energy UK rates, every week you delay costs you money that cannot be recovered. Call us today, and we will get you onto a competitive fixed deal within days.
Get in touch today to know more!
This guide was written by the Kilowatt Energy advisory team, independent business energy and utility brokers
registered with the Retail Energy Code (REC), ADR Registration C35KILO01, Company No: 15687169. We have
helped hundreds of UK businesses reduce electricity, gas and water costs since 2024.