Market

Reading the UK forward curve: a buyer's primer

Finance directors need to see the forward curve as a risk‑management tool, not a trading chart. This guide explains contango, backwardation and seasonal shapes, what moves the curve and when locking in supply can protect the balance sheet or erode value. It also shows how a structured flex‑management approach can turn market volatility into cost certainty.

By TUS Trade Desk — Commercial Energy Consultants•Published 6 November 2026•6 min read

Reading the UK forward curve is about managing risk, not predicting price spikes. For a finance director the key question is whether a forward contract will improve cash‑flow certainty and protect the organisation against regulatory cost pressures. The answer depends on the shape of the curve, the drivers behind it and the timing of the lock‑in.

Understanding the forward curve

The forward curve plots the price at which gas or electricity can be purchased for delivery at future dates. It is a market‑derived expectation of price, expressed in £/MWh for power and £/MWh or £/kWh for gas. The curve is not a forecast; it is a snapshot of market sentiment at a point in time.

Contango and backwardation

Contango – the curve rises with time. This signals that the market expects higher future prices, often because of anticipated supply constraints, higher carbon costs or upcoming capacity market settlements. In a contango environment a forward contract can lock in a price below the expected spot, delivering a cost advantage.
Backwardation – the curve falls with time. This occurs when current demand is high or when forward supply is abundant, for example after a mild winter or when large renewable output is expected. Locking in a forward price in backwardation may mean paying more than the future spot price, eroding the benefit.

Seasonal patterns

The UK curve shows a pronounced seasonal rhythm. Winter months (Oct‑Mar) carry higher power prices due to heating demand and lower wind output, while summer months (Jun‑Aug) are cheaper. Gas follows a similar pattern but is also shaped by storage cycles and the annual gas balancing mechanism. Recognising these patterns helps a finance director decide whether to hedge the winter peak, the summer trough or both.

What drives the curve

Fuel price fundamentals

Gas‑on‑gas and gas‑to‑power price spreads are the primary drivers. When wholesale gas prices rise, power generators that rely on gas pass the cost through, pushing the power forward curve higher. Conversely, a fall in gas prices can flatten the curve.

Capacity market and TNUoS

The Capacity Market (CM) auction outcomes affect forward electricity prices by adding a premium for guaranteed capacity. A high CM price lifts the forward curve, especially for peak‑time contracts. Transmission Network Use of System (TNUoS) charges, set by the regulator, also feed into forward pricing – any increase in TNUoS is reflected in the curve several months ahead.

Weather and demand forecasts

Met Office seasonal forecasts and real‑time weather models feed directly into demand projections used by Ofgem’s Balancing and Settlement Code (BSC). A colder than expected winter pushes the forward curve into contango, while a milder outlook can create backwardation.

Policy and carbon costs

The UK Carbon Price Floor (CPF) and the Climate Change Levy (CCL) are embedded in forward pricing. Recent adjustments to the CPF have added 5‑10 % to forward power prices. The Department for Energy Security and Net Zero (DESNZ) publishes annual targets that influence long‑term expectations for renewable subsidies, which in turn shape the curve.

When to lock in contracts

Benefits of forward procurement

Cost certainty – A fixed price protects the organisation against spot‑price volatility, supporting budgeting and KPI tracking.
Regulatory compliance – Under SECR, large businesses must report energy‑related costs. A forward contract simplifies reporting and can improve the carbon intensity metric if the contract is linked to low‑carbon generation.
Strategic advantage – In a contango market, locking in ahead of a projected price rise can deliver savings that exceed the contract price by 5‑15 %.

Risks of premature locking

Opportunity cost – If the curve moves into backwardation, the organisation may over‑pay relative to the spot market.
Liquidity constraints – Forward contracts often require credit lines or collateral. Over‑committing can strain the balance sheet.
Regulatory change – Unexpected policy shifts (e.g., a sudden change to the CfD regime) can alter the forward price landscape.

How TUS can help manage exposure

Flex management of 150+ GWh

TUS’s flex‑management platform has already balanced more than 150 GWh under forward‑curve optimisation. By dynamically shifting load in response to price signals, the platform reduces the volume that needs to be fixed in a forward contract, preserving flexibility while still delivering certainty.

Supplier panel performance

With a 30‑plus supplier panel, TUS routinely beats supplier projections by 20 % over a 12‑month horizon. This track record means that forward contracts sourced through TUS are more likely to deliver the expected savings, especially when the market is in contango.

Integrated reporting

TUS’s Yolk portal provides a free, real‑time view of forward positions, actual consumption and realised savings. The average switching saving reported through Yolk is 27 %, giving finance directors a clear benchmark for evaluating any new forward purchase.

Bottom line

For a finance director, the forward curve is a decision‑making framework rather than a market forecast. Identify whether the curve is in contango or backwardation, understand the seasonal and policy drivers, and match the hedge horizon to the organisation’s cash‑flow and regulatory needs. Leveraging a specialist flex‑management partner such as TUS can turn market volatility into a predictable cost base while preserving the ability to capture upside when the curve moves favourably.