Breakeven inflation meaning

Breakeven inflation is the market‑implied inflation rate over a given maturity that equates the return on a conventional (nominal) gilt with the return on a UK index‑linked gilt of similar term. In practice, it is approximated by the yield spread between those two securities and is used to compare real and nominal returns. This is a descriptive market term, not defined in legislation or case law, but widely used across capital markets, pensions and derivatives documentation. Key features include dependence on the reference index (UK index‑linked gilts reference RPI; planned reform aligning RPI with CPIH from 2030 may affect breakevens) and the inclusion of risk, liquidity and seasonality premia, so it is not a pure inflation forecast. Typical uses: benchmarks and disclosures in prospectuses and offering circulars; investment management agreements and LDI strategies; pension scheme funding and valuation reports; pricing and collateral terms in inflation swaps and other derivatives; and financial modelling and covenants referencing inflation assumptions. Usage is broadly consistent across England & Wales, Scotland and Northern Ireland. In Ireland, breakeven inflation is commonly inferred from euro‑area inflation‑linked bonds and swaps due to limited domestic index‑linked issuance, but the concept is applied in the same way.