Buy-out price index changes from RPI to CPI
Summary
The Department for the Economy (Northern Ireland) amended the Renewables Obligation Order (Northern Ireland) 2009, replacing the Retail Prices Index (RPI) with the Consumer Prices Index (CPI) for calculating buy-out prices in obligation periods after 1 April 2025. The order defines 'consumer prices index' as the index calculated by the Statistics Board. This statutory rule (SR (NI) 2026 No. 67) came into operation on 24 March 2026.
What changed
The Renewables Obligation (Amendment) Order (Northern Ireland) 2026 makes two key amendments. First, it inserts a definition of 'consumer prices index' into Article 2(1) of the 2009 Order, referencing the index calculated by the Statistics Board. Second, it amends Article 40(4) regarding payments to discharge the renewables obligation: for obligation periods after 1 April 2025, the buy-out price is calculated by increasing or decreasing the previous period's price by the percentage change in CPI over the 12-month period ending 31 December in the previous obligation period, rounded to the nearest penny.
Electricity suppliers participating in the Northern Ireland Renewables Obligation scheme should ensure their billing and compliance systems reflect the CPI-based calculation for buy-out prices for obligation periods after 1 April 2025. The change applies to future obligation periods only and does not require retrospective adjustments. Suppliers should review their financial projections and compliance filings to account for the different inflation measure.
What to do next
- Update buy-out price calculation systems to use CPI instead of RPI for obligation periods after 1 April 2025
- Review financial projections for renewables obligation compliance costs
- Ensure billing and reporting processes align with the new CPI-based methodology
Source document (simplified)
Changes over time for: The Renewables Obligation (Amendment) Order (Northern Ireland) 2026
Alternative versions:
- 24/03/2026 - Amendment
- 24/03/2026 Point in time
Status:
Point in time view as at 24/03/2026.
Changes to legislation:
There are currently no known outstanding effects for The Renewables Obligation (Amendment) Order (Northern Ireland) 2026.
Changes to Legislation
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Statutory Rules of Northern Ireland
2026 No. 67
Electricity
The Renewables Obligation (Amendment) Order (Northern Ireland) 2026
Made
23rd March 2026
Coming into operation
24th March 2026
The Department for the Economy (“ the Department ”) makes the following Order in exercise of the powers conferred by Articles 52 to 55F and 66(3) of the Energy (Northern Ireland) Order 2003(1)(“ the 2003 Order ”).
The Department has consulted the Northern Ireland Authority for Utility Regulation, the General Consumer Council for Northern Ireland, electricity suppliers to whom this Order applies, and such generators of electricity from renewable sources in Northern Ireland and other persons as it considered appropriate in accordance with Article 55E of the 2003 Order.
In accordance with Article 66(2) of the 2003 Order, a draft of this Order was laid before and approved by a resolution of the Assembly.
Citation and commencement N.I.
- —This Order may be cited as the Renewables Obligation (Amendment) Order (Northern Ireland) 2026 and comes into operation on the day after the day on which it is made.
Commencement Information
I1 Art. 1 in operation at 24.3.2026, see art. 1
Amendments to the Renewables Obligation Order (Northern Ireland) 2009 N.I.
- —(1) The Renewables Obligation Order (Northern Ireland) 2009(2) is amended as follows.
(2) In article 2(1) (interpretation), at the appropriate place, insert—
“ “ consumer prices index ” means
(a) the consumer prices index calculated and published by the Statistics Board (3) or
(b) where the index is not published for a month, any substituted index or figures published by the Statistics Board; ”
Commencement Information
I2 Art. 2 in operation at 24.3.2026, see art. 1
- In article 40(4) (payments to discharge the renewables obligation)—
(a) omit the “and” after sub-paragraph (a);
(b) in sub-paragraph (b) for “for each obligation period thereafter”, substitute “for each subsequent obligation period up to and including the obligation period starting on 1 st April 2025”;
(c) after sub-paragraph (b), insert–
“; and
(c) for each obligation period thereafter, the buy-out price for the previous obligation period increased or, as the case may be, decreased by the percentage increase or decrease in the consumer prices index over the 12 month period ending with 31st December in the previous obligation period (the resulting figure being rounded to the nearest penny, with any half of a penny being rounded upwards). ”
Commencement Information
I3 Art. 3 in operation at 24.3.2026, see art. 1
Sealed with the Official Seal of the Department for the Economy on 23rd March 2026
Minister
Department for the Economy
EXPLANATORY NOTE
(This note is not part of the Regulations)
This Order amends the Renewables Obligation Order (Northern Ireland) 2009 (SR 2009/154) (“ the 2009 Order ”).
The 2009 Order imposes on all electricity suppliers licensed under the Electricity (Northern Ireland) Order 1992 that supply electricity in Northern Ireland, an obligation (“ the renewables obligation ”) to produce a specified number of renewables obligation certificates (“NIROCs”) in respect of each megawatt hour of electricity they supply to customers in Northern Ireland during periods known as “obligation periods”.
The Northern Ireland Authority for Utility Regulation (“Utility Regulator”) are responsible for the administration of the renewables obligation issuing NIROCs to accredited renewable electricity generators based on their output. These certificates are sold to electricity suppliers with or without the associated renewable electricity.
In lieu of each NIROC, suppliers can also make a payment to the Utility Regulator at a set price (the “buy-out price”). The buy-out price is indexed to inflation and has changed in line with the retail prices index each year since the renewables obligation came into force. This Order provides for the buy-out price to increase (or decrease, as the case may be) in line with the consumer prices index instead of the retail prices index for all obligation periods from 1st April 2026 onwards.
A full impact assessment of the effect that this instrument will have on the costs of businesses, voluntary bodies and community bodies is available alongside this instrument on www.legislation.gov.uk and from the Department for the Economy NI, 39-49 Adelaide Street, Belfast, BT2 8FD.
(1) The Energy (Northern Ireland) Order 2003 (S.I. 2003/419 (N.I. 6)
(2) The Renewables Obligation Order (Northern Ireland) 2009 (S.R. 2009 No. 154), the relevant amendments are S.R. 2011 No. 169, S.R. 2014 No. 146, S.R. 2016 No. 110 and S.R. 2021 No. 139.
(3) The Statistics Board was established by section 1 of the Statistics and Registration Service Act 2007 (c. 18)
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