PDF report

Inflation adjustment letter (United Kingdom)

To request or announce an adjustment to rent, an installment, a fee or a salary using the official index.

A letter ready to hand over, filled in with your updated amount, plus the backing for the math: the official index for each date, the agency that publishes it and the link to the source.

With the backing in plain sight, the other side can check the number in a minute and the conversation becomes about the index, not the math.

What it looks like

Works with these calculators

UK inflation calculator (CPI)

Official sources it uses

Office for National Statistics: CPI INDEX 00: ALL ITEMS 2015=100 (series D7BT, dataset MM23) (14/10/2026)