Back to research

Case Studies

What the Rise in Electricity Generator Levy to 55% Means for Energy Firms and Investors

From 1 July 2026 the UK’s Electricity Generator Levy jumps to 55%—we explore what this change means for low-carbon generators, project finance, and your investment planning.

By NomadicTax Research Team · 5-8 min read

Overview of the Electricity Generator Levy (EGL)

The Electricity Generator Levy is a tax on exceptional electricity generation receipts, mostly affecting low-carbon generators (renewables, nuclear). Originally introduced in 2023, it targets periods when wholesale electricity prices (driven by gas) exceed certain benchmarks. (gov.uk)

Recent Change: Rate Increase from 45% to 55%

From 1 July 2026, the rate of EGL will increase from 45% to 55%. This applies to receipts from that date onwards, with pro-rata apportionment for accounting periods straddling 1 July. (gov.uk)

Implications for Generators & Investors

  • Profitability: Low-carbon generators that routinely benefit from high wholesale prices (e.g. wind or solar plants output when gas sets marginal cost) will see reduced net receipts.
  • Investment models: Projects must now price in higher levy costs—this could impact financial modelling, especially for newer investments where benchmarks are uncertain.
  • Contracts for Difference (CfD) projects vs non-CfD: Assets under fixed-price contracts or CfDs may be exempt from the levy or less exposed. Such contracts become more valuable.

Examples

Case A: A solar farm generating electricity in Q3 2026 sees exceptional receipts: prior to 1 July, taxed at 45%; from 1 July onwards, new revenue taxed at 55%. The company will need careful accounting over periods overlapping the change.

Case B: An investor evaluating a wind farm project is comparing fixed vs market risk. Under this change, insisting on a CfD or fixed pricing mechanism reduces exposure to the levy.

Strategic Responses and Actions

  • Assess whether generation assets are structured under contracts offering fixed or variable pricing. Shift towards fixed arrangements where feasible.
  • For projects in development, build in sensitivity scenarios that assume 55% levy from July 2026.
  • Explore cost pass-through options and ensure contracts or power purchase agreements reflect exposure to levy changes.

Category: Case Studies
Published: Effective 1 July 2026 change; announcement in early May 2026.

Sources

Structured source metadata was not recorded; see citations in the article body.