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Competitive PricesWhat is business energy procurement?
Last updated August 2026.
Business energy procurement is the process of planning, buying and managing energy supply for an organisation. That means deciding which contract structure to use, when to buy, which suppliers to approach, how to group sites, and how invoices are validated afterwards. For a small business it’s a once-a-year renewal. For larger and multi-site organisations it’s a continuous process, because structure, timing and data quality each move the final cost by more than any single quote comparison.
This page covers energy procurement in depth for UK businesses, with a focus on larger consumers and multi-site portfolios. For the cross-utility picture including water and waste, see our page on commercial utility procurement strategies.
What does energy procurement involve?
Energy procurement runs on a handful of linked decisions, each with a measurable cost when ignored.
Fixed, flexible, pass-through or basket. This sets who carries market risk and how your final price forms.
When the contract is signed, and for flexible arrangements, when each tranche is bought.
Which suppliers are approached, on what specification, and what consumption data sits behind the tender.
Whether sites sit on one contract, aligned end dates, or a planned stagger.
Checking every invoice against contracted rates, metered consumption and published charges once supply starts.
The cost of ignoring each one is specific. A missed renewal moves supply onto out-of-contract rates, commonly around double contracted rates. Sites bought separately give up the volume-based terms they’d earn bought together. A tender run on estimates rather than metered data gets priced with a risk premium. And unvalidated invoices let errors stand. On multi-site portfolios, billing errors are a matter of when, not whether.
What contract structures can UK businesses buy energy on?
There are four main structures. Fixed, flexible, pass-through and basket. The table gives the short version, and each is expanded underneath.
| Structure | How the price forms | Who carries market risk | Best suited to |
|---|---|---|---|
| Fixed | All rates locked in one purchase for the term | The supplier, priced into the rate | Businesses that value budget certainty |
| Flexible | Volume bought in tranches across the term | The customer, managed through timing | Large consumers with an appetite for the market |
| Pass-through | Wholesale fixed, network and policy charges passed through at cost | Shared | Businesses accepting some variability for a lower headline rate |
| Basket | Pooled volume of many businesses bought flexibly | Shared across the group | Multi-site portfolios below standalone flexible volume |
Fixed contracts lock every unit rate for the term in a single purchase. The supplier takes the market risk and charges a premium for holding it. Certainty is the product. See our glossary entry on fixed rate contracts and the full guide to fixed rate business electricity contracts.
Flexible contracts split your volume into tranches bought at different points, so the final price averages several decisions rather than one day’s market. They need ongoing attention, which is why they suit organisations with an energy manager or a managed service behind them. See flexible procurement.
Pass-through contracts fix the wholesale element while network and policy charges flow through at cost as they change. The headline rate looks lower because less risk is priced in. What the term actually costs depends on what those charges do. See pass-through contracts.
Basket contracts pool several businesses’ volume into one managed flexible arrangement, covered fully in the next section.
The fixed-or-flexible decision is the one most businesses actually face. Our full comparison of fixed vs flexible business energy works through it properly.
What is a basket contract and who should use one?
A basket contract pools the energy volume of multiple businesses into a single flexible purchasing arrangement, managed centrally. Each member pays its share of the blended purchasing outcome. Baskets exist because standalone flexible contracts generally start in the low gigawatt-hours per year, and plenty of multi-site businesses sit below that line while still being too large to be comfortable fixing everything on one date.
What a member gets. Tranche buying without running a trading strategy in-house, purchasing terms earned by the group’s combined scale, and one managed process across every site in the basket. What a member gives up. Direct control. The basket manager sets the purchasing strategy, and entry and exit work around defined windows rather than on demand.
A retailer with 14 sites using 3.2 GWh a year sits below most suppliers’ standalone flexible threshold, so on its own its realistic options are fixed or pass-through. Inside a basket buying 150 GWh across its membership, the same 14 sites get tranche purchasing, spread timing risk and group-scale terms. Example only. Thresholds and terms vary by supplier and basket.
Baskets suit multi-site portfolios without a dedicated energy manager. They rarely suit a business that wants to approve every purchase itself.
How should multi-site businesses structure their energy contracts?
Multi-site businesses should hold their sites under a deliberate structure. One aligned end date, a planned stagger, or a managed basket. All three are defensible. The accidental version, where each site renews on whatever date history left it, is the expensive one, because every unwatched date is a chance to drift onto out-of-contract rates.
Concentrates the full portfolio volume into a single tender, which is the strongest negotiating position available, and reduces administration to one cycle. The weakness is that the whole portfolio prices on one market moment.
A third of sites renewing each year spreads the portfolio across three market moments instead of one. The weakness is permanent ongoing renewal activity that someone has to own.
Sites sit inside a basket arrangement, so purchasing and renewals are handled within the group rather than site by site. The least administration of the three, in exchange for following the basket’s purchasing strategy.
The practical work is the same whichever you choose. A single tracked record of every site’s supplier, contract end date, notice period and termination window, with named ownership. A 20-site operator with renewals scattered across all twelve months can consolidate to two end dates of ten sites each, eighteen months apart. Two tenders instead of twenty, and no site left renewing unnoticed. Portfolio alignment, renewal tracking and multi-site quoting are what our multi-site and multi-utility management service handles.
When is the best time to buy business energy?
There’s no reliably predictable best time to buy. Wholesale prices move on weather, generation margins, storage levels and global fuel markets, and no supplier, broker or forecaster consistently calls the direction. Anyone claiming otherwise is selling the claim, not the outcome. What a business does control is its exposure and its discipline, and two rules hold in any market.
Larger renewals should begin 12 to 18 months before contract end. Suppliers will price that far ahead, every structure is still available, and nothing gets signed under deadline pressure. A renewal started six weeks out has already surrendered most of its options.
Tranche buying, through a flexible contract or a basket, means no single day prices your entire volume. Spreading purchases won’t beat the market. It removes the worst single outcome, which for most boards is the actual requirement.
The arithmetic is simple. A business fixing 4 GWh on one day carries 100% of that day’s price for the whole term. The same volume bought in eight quarterly tranches carries a blend of eight prices. If the market falls after the first purchase, seven later purchases benefit. If it rises, the first is protected. The blend is smoother in both directions. Example only.
How much of a business energy bill is actually negotiable?
Around three fifths of a typical business electricity bill in 2026 is non-commodity cost, set by regulators and government rather than negotiation. The negotiable share is the wholesale element and the supplier’s margin, alongside two things that aren’t negotiated at all but are controlled. Consumption and billing accuracy.
| Bill component | What it is | Who sets it | Can procurement influence it? |
|---|---|---|---|
| Wholesale energy | The energy itself | The market | Yes. Structure and timing |
| Supplier margin | The supplier’s charge for supply and risk | The supplier | Yes. Tendering and volume |
| DUoS | Local distribution network charges | Ofgem-regulated network operators | No, though capacity and timing of use affect exposure |
| TNUoS | National transmission charges. See TNUoS charges explained | Regulated methodology | Only partially, for half-hourly sites |
| BSUoS | The cost of balancing the system | Industry code | No |
| CCL | Government environmental levy | HM Treasury | No, though reliefs exist for some sectors |
| Policy levies | Renewables and capacity schemes | Government | No |
Because most of the bill can’t be negotiated, serious procurement extends into three areas beside the unit rate. Bill validation, checking each invoice against contracted rates, metered consumption and published charges. On larger portfolios validation typically pays for itself, because errors recur and compound quietly. Capacity management, since half-hourly sites pay for an agreed level of authorised supply capacity measured in kVA. Breaching it triggers excess capacity charges, and holding far more than the site ever uses wastes money every month. A portfolio-wide capacity review is one of the most reliable savings exercises available. And consumption itself, because the unit you don’t buy outperforms any unit you negotiate. A structured business energy audit finds the waste, and our guide on how to reduce business energy costs covers the practical measures.
Why does half-hourly data matter for procurement?
Half-hourly data records a site’s consumption in thirty-minute blocks, and it’s the basis on which suppliers price larger supplies. A tender backed by twelve months of clean half-hourly data gets priced on evidence. A tender backed by estimates gets priced with a risk premium. Sites with maximum demand above 100kW are already settled half-hourly. See our glossary entry on half-hourly meters and the full guide to half-hourly electricity meters.
The rest of the market is being moved onto the same basis under Market-wide Half-Hourly Settlement (MHHS), described by Elexon as one of the biggest changes to the electricity market since competition began.
| MHHS milestone | Date |
|---|---|
| Central systems deployed | September 2025 |
| Meter migration began | October 2025 |
| All suppliers operating under the new model | October 2026 |
| Meter migration complete | May 2027 |
| Faster settlement timetable begins | July 2027 |
The procurement consequence is that suppliers will increasingly price on when energy is used, not just how much. Businesses able to shift load away from peak periods become more attractive to price. Sites that are currently non-half-hourly get migrated within the programme, so the data foundation arrives whether or not a business plans for it. Planning for it is better.
How do businesses procure renewable energy?
There are three main routes to renewable supply, with different levels of cost, commitment and credibility.
Standard supply contracts backed by REGO certificates matching consumption to renewable generation. The simplest route. Credibility depends on the certification behind the tariff, not the branding on it.
A PPA contracts directly with a generator, often for five to fifteen years. Stronger green claims and long-term price visibility, in exchange for long commitment and more complex contracting. Realistic mainly for larger consumers.
Solar or other generation at the site, reducing imported volume and providing partial price insulation, with export arrangements for any surplus.
The choice also feeds reporting, because what a business buys shapes what it discloses under carbon reporting schemes. That makes renewable procurement a board decision rather than a supply detail.
Which compliance schemes affect large energy buyers?
Two schemes matter most, and both qualify businesses by size.
| Scheme | Who qualifies | What it requires |
|---|---|---|
| ESOS | UK organisations with 250 or more employees, or turnover above £44m together with a balance sheet above £38m | Energy audits and action plans on a fixed compliance cycle. Official guidance is on GOV.UK |
| SECR | Large companies meeting Companies Act size tests | Annual reporting of energy use and carbon emissions |
The procurement connection is data. The half-hourly records, site lists, consumption baselines and audit findings that drive good purchasing are the same material compliance reporting runs on. Organisations that treat procurement and compliance as one workstream collect the data once. Organisations that treat them separately pay twice for the same information.
Do you need a broker for energy procurement?
No. A business with time, data and supplier access can run its own tenders, and some do it well. What an intermediary adds is capacity and reach. Multi-supplier tendering, tranche management on flexible arrangements, validation at portfolio scale, and a renewal calendar someone is actually paid to watch. We’ve set out what an energy broker does, broker versus going direct and the energy consultant vs broker distinction elsewhere.
The market is also about to be regulated. In October 2025 the government confirmed that Ofgem will become the regulator for energy brokers and other third-party intermediaries, with a registration regime to follow legislation. Until that framework is in force, the practical checks remain the buyer’s job. Commission transparency on request, membership of a dispute resolution scheme, and a process that explains rather than rushes. Our guides on how to choose a business energy broker and how to check a broker is legitimate cover the detail.
Key terms in energy procurement
| Term | What it means |
|---|---|
| Flexible procurement | Buying energy volume in tranches over time rather than in one purchase. |
| Pass-through contract | A contract fixing wholesale costs while passing network and policy charges through at cost. |
| Half-hourly meter | A meter recording consumption in thirty-minute blocks, standard for larger supplies. |
| Bill validation | Systematic checking of invoices against contracted rates and metered data. |
| Authorised supply capacity | The agreed maximum demand a half-hourly site pays to have available. |
| PPA | A long-term power purchase agreement contracted directly with a generator. |
| REGO | The certificate scheme matching supplied electricity to renewable generation. |
| Out-of-contract rate | The default rate applied when supply continues without a contract, commonly around double contracted rates. |
| ESOS | The mandatory energy audit scheme for large UK organisations. |
How does Clearsight help with energy procurement?
We run the parts most businesses don’t have the hours for. Portfolio review and renewal tracking across every site, tendering to a wide supplier panel on your actual consumption data, structure advice on fixed, flexible and basket options, and validation once the contract is live. You keep the decisions. We keep the calendar, the data and the market contact. If you’d like a view of where your current contracts stand, start with a comparison or see how we handle multi-site portfolios.
