NS&I confirm Index-linked Savings Certificates to move from RPI to CPI
Customers will continue to benefit from inflation beating returns, tax-free interest and the 100% security that comes with NS&I products.
From 1 May 2019, existing holders of Index-linked Savings Certificates who renew into a new term will receive index-linking based on the Consumer Prices Index (CPI) measure of inflation, rather than the Retail Prices Index (RPI).