Cpi 2024/25 Tax. The standard multiplier will be uprated in april by september’s cpi figure (6.7%), increasing the multiplier from 51.2p to 54.6p; · business rates standard multiplier increases based on september’s 2023 consumer price index (cpi) rate of 6.7% (small business rate multiplier remains frozen) ·.

Update for september 2022 cpi. Tax relief has increased while employee contributions have decreased for the uprate by cpi and uprate by awe options.