From ROCs and FiTs to CfDs: how UK renewables support has evolved and what it means for revenue profiles

Support mechanisms for renewables in the UK have been redesigned over decades to balance deployment, consumer cost and technology maturity. The Renewables Obligation delivered volumetric support for large generators, while Feed‑in Tariffs supported small distributed generation. Contracts for Difference (CfDs) established a revenue‑stabilising mechanism that hedges wholesale price volatility through a strike price and a market reference price, thereby reducing merchant exposure for successful bidders.

The consequence of this evolution is a spectrum of revenue profiles across projects. Projects with long‑term, guaranteed payments under support schemes or legacy contracts tend to offer more predictable cashflows and are easier to finance. Merchant plants or those reliant on corporate offtake face greater exposure to wholesale price swings, shaping expected returns and risk. Smaller distributed projects often combine multiple revenue streams — merchant sales, corporate PPAs or local balancing payments — which can complicate cashflow forecasting.

Policy frameworks influence whether new projects can secure stable, auctioned support or must operate merchant. For investors, the support regime that applies to an asset determines its sensitivity to market prices and policy changes. Thorough disclosure of a project’s contractual revenue sources helps clarify the volatility an investor should expect.

Retail savers considering fractional investments in renewable infrastructure should consider how the underlying support regime or contract type affects revenue stability. Funds that transparently categorise assets by support status — subsidised, contracted or merchant — enable clearer assessment of portfolio cashflow characteristics.