The UK RPI rate for 2023 was 8.8% in September 2023 , then 5.0% in October , 4.1% in November , and 4.1% in December. The full 2023 monthly values show a clear slowdown through the year, with RPI at 8.8% in Sep 2023 and 4.1% by Dec 2023.

Quick Scoop

If you mean the year-end 2023 RPI rate , the best single figure is 4.1% for December 2023.

If you want, I can also give you:

  • the full 2023 monthly RPI table ,
  • the annual average for 2023 , or
  • the difference between RPI, CPI, and CPIH.