Registering in Northern Ireland — what makes it unique
Northern Ireland has its own Companies House office based in Belfast. Companies registered here receive a Company Registration Number with the "NI" prefix (e.g. NI123456), distinguishing them from companies registered in other UK jurisdictions. The registered office must be located in Northern Ireland.
Northern Ireland has its own devolved government at Stormont, with some business-relevant powers including planning, economic development, and certain aspects of taxation (notably Air Passenger Duty for direct long-haul flights). This gives the NI Executive some tools to shape the local business environment.
Perhaps most significantly, under the Windsor Framework (the successor to the Northern Ireland Protocol post-Brexit), Northern Ireland has a genuinely unique dual-market position: NI businesses trading in goods can access both the UK's internal market and the EU's single market for goods. This makes Northern Ireland one of the most strategically compelling locations in the British Isles for manufacturing, agri-food, and goods distribution businesses.
Invest Northern Ireland
Invest NI is Northern Ireland's primary inward investment and business development agency, funded by the Northern Ireland Executive. It is one of the most active and well-resourced regional development agencies in the UK, with a strong track record of attracting major international businesses to Belfast and the wider region.
- Business development grants — capital and revenue support for growing NI companies.
- R&D and innovation support — funding and expertise to help businesses develop new products and processes.
- Export development programmes — helping NI companies break into international markets.
- Skills and workforce development funding — support for training and upskilling.
- Site finding and property services — assistance locating and acquiring premises.
- InterTradeIreland — cross-border body supporting trade between NI and the Republic of Ireland.
Northern Ireland's key sectors
Agri-food
NI's largest manufacturing sector. Moy Park, Lakeland Dairies, and dozens of producers export globally. Strong links to the Republic of Ireland's food sector.
Advanced Manufacturing
Bombardier (now Spirit AeroSystems), Caterpillar, and Rolls-Royce have major NI operations — a heritage of precision engineering.
Life Sciences
A growing pharma and medtech cluster including Almac Group, one of the world's leading pharmaceutical development and manufacturing businesses.
Financial Services
Belfast's emerging fintech scene, plus established financial and insurance operations. Lower costs than London attract financial services firms.
Technology
Belfast's tech sector grew 50% in five years. Allstate, Liberty IT, Concentrix, and CMC Markets all have major Belfast operations.
Logistics & Distribution
NI's strategic position for UK-EU cross-border trade under the Windsor Framework creates real supply chain advantages.
Living and working costs
- Lowest commercial property costs of any major UK city — Belfast office rents are a fraction of London or even Manchester rates.
- Belfast named one of the UK's most affordable cities for businesses and employees alike.
- Strong talent pipeline from Queen's University Belfast (Russell Group) and Ulster University.
- Very active business community via NI Chamber of Commerce, Belfast Chamber, and sector-specific bodies.
- Population of approximately 1.9 million with strong cross-border commuter links to the Republic of Ireland.
- George Best Belfast City Airport and Belfast International Airport provide UK and European connectivity.
Related formation pages
Frequently asked questions
What is the NI prefix on a Northern Ireland company number?
Companies registered in Northern Ireland at Companies House are assigned a Company Registration Number with the prefix "NI" — for example, NI123456. This prefix identifies the company as registered in the Northern Ireland jurisdiction, distinguishing it from English/Welsh companies (no prefix) and Scottish companies (SC prefix). The NI prefix appears on the certificate of incorporation and all official documents.
How does Brexit affect companies registered in Northern Ireland?
Under the Windsor Framework (formerly the Northern Ireland Protocol), Northern Ireland occupies a unique dual-market position. NI companies trading in goods have access to both the UK's internal market and the EU's single market for goods — meaning they can sell into Great Britain without customs checks, and into the Republic of Ireland and wider EU with minimal additional barriers. This is a genuine commercial advantage for manufacturing and goods-trading businesses not available to companies elsewhere in the UK.
What is Invest Northern Ireland?
Invest Northern Ireland (Invest NI) is the region's economic development and inward investment agency, funded by the Northern Ireland Executive. It supports businesses through grants for business development, R&D support, export development programmes, skills funding, and site finding for new premises. For foreign direct investment into NI, Invest NI is typically the first point of contact. InterTradeIreland supports cross-border trade between NI and the Republic of Ireland.
Can I trade with both UK and EU from a Northern Ireland company?
Yes — and this is one of Northern Ireland's most compelling commercial advantages post-Brexit. Under the Windsor Framework, NI businesses selling goods can access both the UK internal market and the EU single market with greatly reduced friction. This is particularly valuable for manufacturers, food producers, and distributors. However, services businesses see less benefit from this arrangement, as services trade is not covered by the Windsor Framework in the same way.
Do I need to live in Northern Ireland to register a company there?
No. There is no requirement for directors or shareholders to live in Northern Ireland or anywhere in the UK to register a Northern Ireland company. The only legal requirement is that the registered office address is physically located in Northern Ireland. Many international investors use a professional registered office service in Belfast to satisfy this requirement. Companies House Northern Ireland is based in Belfast.