Business Rates (NNDR) Explanatory Notes 2023-24

Business Rates (NNDR) Explanatory Notes

The information given below explains some of the terms which may be used on a non-domestic rate demand and in the supporting information. 

Non-domestic Rates

The non-domestic rates collected by billing authorities are paid into a central pool and redistributed to county and county borough councils and police and crime commissioners. Your council and police and crime commissioner use their shares of redistributed rate income, together with income from their council tax payers, revenue support grant provided by the Welsh Ministers and certain other sums, to pay for the services they provide. Further information about the non-domestic rates system, including what reliefs are available may be obtained via


Rateable Value

The rateable value of a non-domestic property is fixed in most cases by an independent valuation officer of the Valuation Office Agency which is an Executive Agency of Her Majesty’s Revenue and Customs (HMRC). They compile and maintain a full list of the rateable values of all non-domestic properties in Wales, available on their website at All non-domestic property is normally revalued every 5 years. From 1 April 2023 the rateable value of a property represents its annual open market rental value as at 1 April 2021

For composite properties which are partly domestic and partly non-domestic the rateable value relates to the non-domestic part only. The values of all property in respect of which rates are payable to your authority are shown in the local rating list, a copy of which may be inspected at your local valuation office or Blaenau Gwent County Borough Council.



All rateable values are reassessed at a general revaluation to ensure rates paid by any one ratepayer reflect changes over time in the value of their property relative to others. This helps maintain fairness in the rating system by updating valuations in line with changes in the market. The 2023 rating list comes into effect on 1 April 2023 and is based on values as at 1 April 2021.

In the year a revaluation takes effect, the multiplier is rebased to account for overall changes to total rateable value and to ensure that the revaluation does not raise extra money.


Alteration of Rateable Value

The rateable value may alter if the valuation officer believes that the circumstances of the property have changed. The ratepayer (and certain others who have an interest in the property) may also in certain circumstances propose a change in value. If the ratepayer and the valuation officer do not agree the valuation within 3 months of the proposal being made, the matter is referred by the valuation officer as an appeal by the proposer to the Valuation Tribunal for Wales. Further information about how to propose a change in a rateable value is available from valuation offices.


Non-domestic Rating Multiplier

This is the rate in the pound by which the rateable value is multiplied to give the annual rate bill for a property. The multiplier set annually by the Welsh Ministers is the same for the whole of Wales and except in a revaluation year cannot rise by more than the rate of the increase in the retail prices index.


Proposals and Appeals

Information about the circumstances in which a change in rateable value may be proposed and how such a proposal may be made is available from the local valuation office shown above. Further information about the appeal arrangements may be obtained from the Valuation Office Agency.

The Valuation Tribunal for Wales provides a free independent appeals service dealing with appeals about Non-Domestic Rates and Council Tax. Their contact details can be found here


Unoccupied Property Rating

Owners of unoccupied non-domestic properties may be liable to empty property rates which are charged at 100% of the normal liability. Liability begins after the property has been empty for 3 months or, in the case of certain industrial properties, after the property has been empty for 6 months. Certain types of property are exempt from empty property rates.


Charitable and Discretionary Relief

Charities and community amateur sports clubs are entitled to 80% relief from rates on any non-domestic property where—

(a) in the case of charities, the property is wholly or mainly used for charitable purposes; or

(b) in the case of a club, the club is registered with HM Revenue & Customs.

Billing authorities have discretion to remit all or part of the remaining 20% of the bill on such property and can also give relief in respect of property occupied by certain bodies not established or conducted for profit.

For more information regarding clubs you should contact HM Revenue & Customs -


Small Business Rate Relief

The Non-Domestic Rating (Small Business Relief) (Wales) Order 2015 makes provision for rates relief for small businesses. Full details including the eligibility criteria, the exceptions, the procedural requirements and the relevant rates reliefs are available Business Rates in Wales | Business Wales (

Transitional Rate Relief

The next non-domestic rating list will come into force on 1 April 2023, following revaluation. The Welsh Government will provide all ratepayers whose liability is increasing by more than £300, as a consequence of revaluation, with transitional relief. Any increase in non-domestic rates liability as a result of revaluation will be phased in over two years.

A ratepayer will pay 33% of their additional liability in the first year (2023-24) and 66% in the second year (2024-25), before reaching their full liability in the third year (2025-26). The Welsh Government is providing £113m over two years to fund this relief, supporting all areas of the tax-base through a consistent and straightforward transitional scheme. 

Guidance for Transitional Relief is available here