Home heating oil suppliers across Northern Ireland will be required to meet tougher regulatory standards following a market investigation by the UK's Competition and Markets Authority (CMA). The new framework will strengthen consumer protections and support for vulnerable households, though it will not introduce the sort of price controls that apply to gas and electricity markets.
According to BBC News, the CMA examined the heating oil market in Northern Ireland and other parts of the UK after significant price volatility. Economy Minister Caoimhe Archibald announced that her department will implement the CMA's recommendations, describing the measures as proportionate and designed to enhance existing protections at minimal additional cost.
The investigation was prompted by dramatic price swings that have affected nearly two-thirds of Northern Ireland households, the highest proportion of any UK region. In March 2026, heating oil prices in Northern Ireland rose by a record 92% in a single month, far exceeding the previous largest spike of 59% recorded in March 2022 following Russia's invasion of Ukraine. The CMA determined that these steep increases largely reflected rising wholesale costs, which account for around 83% of the retail price of heating oil.
What new rules will apply to heating oil suppliers?
On 10 November, the Department for the Economy set out five planned measures to strengthen market oversight. These include establishing a mandatory supplier register, which may use HMRC's existing Registered Dealers in Controlled Oils scheme to track operators in the market. Suppliers will also be required to adopt a formal code of conduct governing their dealings with customers.
The Consumer Council will receive an enhanced role in dispute resolution, handling complaints that cannot be settled between consumers and suppliers. The council will also lead the creation of an opt-in register for vulnerable consumers, with potential data-sharing arrangements involving the Utility Regulator and NIE Networks to identify households requiring additional support.
A new priority service programme will be introduced to ensure vulnerable consumers receive priority access to fuel during supply disruptions or shortages. The Minister told the Assembly that these measures represent a comprehensive response to the CMA's findings, addressing gaps in consumer protection without imposing the sort of price controls that the watchdog concluded could be counterproductive.
Why did the CMA reject price controls?
The CMA's analysis found that prices tended to be lower in Northern Ireland overall compared to Scotland and Wales, where heating oil is typically used in remote rural areas with fewer suppliers and higher delivery costs. The authority concluded that Northern Ireland's competitive market with a sufficient range of suppliers helps keep prices more stable. Rather than introducing price caps, the CMA recommended stronger consumer protections, clearer information requirements, and formal safeguards for vulnerable households.
The CMA identified the need for stronger consumer protection, support for vulnerable households, and more formal dispute resolution arrangements, Archibald told MLAs, adding that the government's response would be delivered at minimal additional cost to the sector.
What happens next?
The Department for the Economy will work with Trading Standards to establish the supplier register and develop the other protective measures. A Home Heating Oil Working Group has been established involving the Consumer Council and Trading Standards Service to oversee implementation. The department has not yet announced specific timelines for when each measure will come into force, though the framework is expected to be rolled out over the coming months.
