Most businesses choose between a fixed and a flexible energy contract once, at a single point in time, and then never revisit that decision again for years. The choice made sense given the circumstances at the time. the market conditions, the business’s risk appetite, whatever advice was available. What rarely happens is a genuine reassessment as those circumstances change, which means a growing number of businesses are sitting on a contract structure that made sense once but has quietly stopped being the right fit.

This matters because fixed and flexible contracts aren’t simply two flavours of the same thing — they represent fundamentally different approaches to managing risk, and the right choice depends on factors that shift meaningfully over time: the business’s size and consumption, its appetite for market exposure, the resources available to actively manage a flexible position, and where the wholesale market itself currently sits in its cycle.

What Each Approach Actually Involves

• A fixed contract locks in your unit rate for the full contract term, providing complete budget certainty regardless of what happens to wholesale prices afterward — you’re protected if prices rise, but you don’t benefit if they fall
• A flexible contract involves purchasing energy in tranches over time at prevailing wholesale prices, requiring active market monitoring and decision-making, with the potential to secure better average pricing but genuine exposure to market movement if managed poorly
• Fixed contracts suit businesses that prioritise predictability and have limited appetite or resource to actively manage energy purchasing as an ongoing function
• Flexible contracts suit larger energy users with the scale, resource, or professional support to genuinely benefit from active market timing rather than simply accepting whatever rate a fixed contract happens to lock in

Why the Original Choice Can Quietly Become the Wrong One

A business that chose a fixed contract several years ago when it was small and risk-averse may have grown significantly since then, reaching a scale where the potential upside of flexible purchasing — managed properly — would now outweigh the value of certainty.

Equally, a business that opted for flexible purchasing during a period of relatively stable wholesale prices may find itself considerably more exposed than intended once market volatility increases, without ever having consciously decided to accept that higher level of risk under current conditions.

The Market Timing Dimension Most Businesses Miss

Neither structure is inherently superior — the right choice interacts heavily with where the wholesale market sits at the point of decision. Fixing a contract when wholesale prices are elevated locks in that higher cost for the full term, regardless of whether prices later fall. Choosing flexible purchasing during a period of high volatility, without the resource to manage it actively, can expose a business to costs considerably above what a well-timed fixed contract would have delivered.

This is precisely why the decision benefits from being revisited periodically against current market conditions, rather than treated as a one-time choice made in isolation from what’s actually happening in the wider market.

Who This Actually Hits Hardest

• Businesses that have grown substantially since their original contract structure was chosen, without revisiting whether that original decision still fits their current scale
• Businesses on flexible contracts without the internal resource or professional support to genuinely manage the position actively, effectively carrying market risk without capturing the benefit that active management would provide
• Businesses on long-term fixed contracts signed during a period of elevated wholesale prices, now locked into a rate considerably above what more favourable timing would have achieved
• Businesses that have never had anyone specifically explain the trade-off between the two approaches in the context of their own specific circumstances

Signs Your Current Structure No Longer Fits

• Your business has changed significantly in size or energy consumption since your current contract structure was originally chosen
• You’re on a flexible contract but nobody is actively monitoring the wholesale market or making purchasing decisions on your behalf
• You’re on a fixed contract that was signed during a period you now know, with hindsight, was an unfavourable point in the market cycle
• Nobody has revisited this specific decision at your last two or more contract renewals

Getting this right isn’t about picking the theoretically superior structure in the abstract — it’s about matching the right approach to your business’s current scale, risk appetite, and the resource genuinely available to manage it, then actually revisiting that match periodically rather than assuming the original decision remains correct indefinitely regardless of how circumstances change around it.

 

Find Out Which Contract Structure Actually Fits Your Business Now Ecotilities reviews whether your current fixed or flexible structure still matches your business’s scale and risk appetite, and manages flexible purchasing actively where that’s the right fit. Visit ecotilities.co.uk/gas-electricity or call 0333 2244 050.

 

Questions Businesses Ask

How do we know which structure is actually right for our business?

This depends on your consumption scale, risk appetite and available resource to manage a flexible position, which is exactly what a proper review with an energy adviser establishes rather than a generic rule of thumb.

Can we switch from fixed to flexible, or the other way round, mid-contract?

This depends on your existing contract terms and any exit provisions, though the switch is generally more straightforward to plan around your renewal point rather than mid-term.

Is flexible purchasing only suitable for very large businesses?

It tends to suit businesses with meaningful consumption and either internal capacity or professional support to manage it actively, though the specific threshold varies by circumstance rather than being a fixed rule.

What happens if we’re on a flexible contract but nobody is managing it actively?

This is a genuinely risky position — you’re carrying market exposure without capturing the benefit active management is meant to deliver, and it’s worth addressing promptly.

How often should this decision actually be revisited?

At minimum, at every contract renewal, though a meaningful change in business size or market conditions is also worth prompting an earlier review.

Does reviewing our current structure cost anything?

No — reviewing whether your current contract structure fits your business is free and carries no obligation to change anything.