About your business rates
Page updated on: 27/11/2025
National Non-Domestic Rates (NNDR or Commercial Rates) is a charge levied on commercial properties and collected by the Local Authority since 1990. The amounts collected by all the authorities in Wales are pooled together and redistributed to local councils by the National Assembly for Wales.
The funds from the pool in addition to the Revenue Support Grant provided by the National Assembly for Wales and Council Tax contributions pay for the services provided in your area.
Payment of Non-Domestic Rates is to be made by 10 monthly instalments from April, due on or before the 15th of each month. If you become liable for Non-Domestic Rates during the year then your instalments will be adjusted according to the number of payment dates remaining.
Business rates 2026 revaluation
Every three years the Valuation Office Agency (VOA) updates the rateable values of over 2 million commercial properties in England and Wales. This process reflects changes in the market and is known as a revaluation.
The next revaluation will come into effect on 1 April 2026.
Rateable values are the amount of rent a property could have been let for on a set valuation date. For the 2026 revaluation, that date is 1 April 2024. Your rateable value isn’t the same as the rent you are paying on your property.
As your local council, we use these rateable values to calculate business rates bills.
At a revaluation, business rates bills may increase, decrease or stay the same. A rise in your rateable value does not necessarily mean your business rates bill will increase by a similar amount.
How your Business Rates are calculated
The basic rates bill is made up by multiplying the rateable value by the rating multiplier or rate in the pound, both of which are shown on the bill.
NNDR Rating Multiplier
Each year the Welsh Government sets a rate by which the rateable value is multiplied to give the annual rate bill for a property. The multiplier is the same for all authorities in Wales and, except in a revaluation year, cannot rise by more than the rate of the increase in the retail prices index. For 2025/26 the multiplier is £0.568.
Rateable Value
All commercial premises are assessed by the Valuation Office Agency who determine the Rateable Value; this represents its annual open market rental value.
Non-domestic property has previously been revalued every five years, but the scheduled 2022 revaluation was brought forward to 2021 by the Chancellor of the Exchequer, a three-year valuation cycle will apply after the 2021 revaluation.
The last revaluation came into force on the 1st of April 2023. All properties are currently valued as at 1st April 2023, this is so that all properties are valued using the same criteria. For composite properties which are partly domestic and partly non-domestic the rateable value relates to the non-domestic part only.
The values of most properties in respect of which rates are payable to your authority are shown in the local rating list, which is available on the valuation Office Agency website.
The final rates bill may be subject to a number of alterations according to the circumstances or location of the business.
