How to register a business in Ireland: a step-by-step guide

Published Tuesday 18 August 2026

Table of contents

• How to choose the right business structure in Ireland
• How to register as a sole trader in Ireland
• How to register a limited company in Ireland
• How to register a partnership in Ireland
• How much does it cost to register a business in Ireland?
• What to do after registering your business
• Common mistakes to avoid when registering a business in Ireland
• Simplify your startup finances with Xero
• FAQs on registering a business in Ireland

Key takeaways

• Sole trader registration is the simplest route: register for income tax with Revenue and file your business name with the Companies Registration Office (CRO) for as little as €20.
• Limited company incorporation through the CRO's CORE portal costs €50 and gives you limited liability, but comes with more filing obligations.
• Tax registration through Revenue's Online Service (ROS) is a separate step from CRO registration, and you may also need to register for Value Added Tax (VAT) depending on your turnover.
• After registering, you still need to file with the Register of Beneficial Ownership (RBO), open a business bank account, and set up your accounting and bookkeeping.

How to choose the right business structure in Ireland

Before you register, you need to pick the right structure for your business. The structure you choose affects your tax obligations, personal liability, and how much paperwork you deal with on an ongoing basis. Here are the three most common options in Ireland.

Sole trader

A sole trader is the simplest way to start a business in Ireland. You and the business are treated as the same legal entity. This means you keep full control over decisions and profits.

The main trade-off is that you're personally liable for all business debts. Your personal assets, such as your home or savings, could be at risk if the business runs into financial trouble.

You pay income tax at your marginal rate (up to 40%), plus Universal Social Charge (USC) and Pay Related Social Insurance (PRSI) on your business profits.

Sole trader status suits freelancers, consultants, and small service providers. Setup is fast, and your ongoing compliance requirements are lighter than those for a limited company.

You file a single annual income tax return (Form 11), and there's no requirement to prepare audited accounts.

Partnership

A partnership is where two or more people run a business together. Each partner shares the profits and responsibilities according to the partnership agreement. There's no separate legal entity; each partner is personally liable for the debts of the business.

A written partnership agreement is strongly recommended, even though it isn't a legal requirement. It should set out each person's roles, profit shares, decision-making authority, and what happens if a partner leaves or the business winds down.

Each partner pays income tax on their share of the profits at their own marginal rate. Partnerships work well for professional services firms, such as accountants, solicitors, or medical practices. They offer a straightforward structure without the governance requirements of a limited company.

Limited company

A limited company is a separate legal entity from its owners. This means your personal assets are protected if the business faces financial difficulty. Your liability is limited to the amount you invested.

The trade-off is more administration. You need to file annual returns, maintain company records, and meet specific governance requirements. Corporation tax applies at a rate of 12.5% on trading profits.

A limited company can make your business appear more credible to clients and suppliers. It also opens up more options for managing your finances as the business grows.

How to register as a sole trader in Ireland

Registering as a sole trader in Ireland is straightforward. Follow these steps to get set up:

1. Register for income tax with Revenue. Set up an account on Revenue's Online Service (ROS) at ros.ie. Complete a Form TR1 to register for income tax and, if applicable, PRSI. Revenue will issue you a tax registration number. This step is essential before you start trading, as all income must be declared from day one.
2. Register your business name with the CRO. If you trade under any name other than your own, you must register it with the Companies Registration Office. File a Form RBN1 through the CORE portal at core.cro.ie. The online fee is €20, or €40 if you file by post. Your business name registration is valid indefinitely, but it must be renewed if any details change.
3. Register for VAT if applicable. You must register for VAT if your turnover exceeds €42,500 for services or €85,000 for goods. Even below these thresholds, you can register voluntarily if most of your customers are VAT-registered businesses. VAT registration is done through ROS using a Form TR1 (or TR2 for companies).
4. Check for sector-specific licences. Some businesses need additional licences or permits depending on the industry. For example, food businesses must register with the Health Service Executive (HSE), and childcare providers need Tusla approval. Construction workers may need a Safe Pass card, and certain financial services require Central Bank authorisation. Check with your local authority or relevant regulatory body to confirm what applies to your sector.

How to register a limited company in Ireland

Setting up a limited company involves more steps, but the process is clearly laid out. Here's what you need to do.

1. Choose a company name. Your name must be unique and not too similar to any existing company on the CRO register. You can search the register on core.cro.ie to check availability before filing. Avoid names that could mislead the public about the nature of the company's business. The CRO also restricts certain words that imply state sponsorship or professional status without proper authorisation.
2. Appoint directors and a company secretary. Every Irish limited company needs at least one director who is resident in the European Economic Area (EEA). If you're the sole director, you must appoint a separate person as company secretary. The secretary is responsible for maintaining statutory registers, filing annual returns, and keeping the company compliant with the Companies Act 2014.
3. Set up a registered office. Your registered office must be a physical address in Ireland. This is where official correspondence from the CRO and Revenue is sent. A PO Box isn't acceptable. Many startups use their accountant's or solicitor's address if they work from home and prefer not to use a residential address.
4. Prepare your company constitution. The constitution sets out the rules for how your company operates. For a private company limited by shares (LTD), you can use the model constitution in Schedule 1 of the Companies Act 2014 or draft a custom one. The constitution covers areas such as director powers, share transfers, and decision-making procedures.
5. File with the CRO via CORE. Submit a Form A1 through the CORE portal at core.cro.ie. You'll need to include the company constitution, details of directors and secretary, registered office address, and share capital information. The filing fee is €50. Processing typically takes three to five business days if all documents are in order.
6. Register for tax with Revenue. Once the CRO issues your company number, register for corporation tax, employer taxes (if hiring), and VAT through ROS. This is a separate process from your CRO filing. Corporation tax in Ireland is charged at 12.5% on trading profits.

How to register a partnership in Ireland

Registering a partnership follows a similar path to sole trader registration, with a few extra considerations. Here's how to get started.

1. Draw up a partnership agreement. While not legally required, a written agreement protects all parties. It should cover profit sharing, decision-making authority, dispute resolution, and exit terms.
2. Register the partnership name with the CRO. If the partnership trades under a name other than the partners' own names, register it on the CORE portal using Form RBN1. The online fee is €20.
3. Register for tax with Revenue. Each partner must register individually for income tax through ROS using Form TR1. The partnership itself also needs a separate tax registration.
4. Register for VAT if applicable. The same VAT thresholds apply: €42,500 for services, €85,000 for goods. Register through ROS if your combined turnover meets or exceeds these amounts.

How much does it cost to register a business in Ireland?

The costs involved in business registration in Ireland are relatively modest. Here's a breakdown of the main fees:

• Business name registration: €20 online through the CRO (€40 for paper filing).
• Limited company incorporation: €50 via Form A1 on the CORE portal.
• Professional services: €200 to €600 if you use an accountant or company formation agent to handle the paperwork.
• Section 137 bond: Approximately €1,600 to €2,000 for a two-year period if your company doesn't have at least one EEA-resident director; this bond covers potential penalties if the company fails to meet its obligations.

Beyond these fees, budget for your initial setup costs. These may include opening a business bank account, purchasing insurance, and setting up accounting software.

What to do after registering your business

Registration is just the first step. Here's what to focus on once your business is officially set up.

Open a business bank account

Keep your business and personal finances separate from day one. Most Irish banks require your CRO registration certificate, proof of identity, and proof of address to open a business account. Some banks also ask for a business plan or projected turnover figures.

Having a dedicated business account makes tax time much simpler and gives you a clearer picture of your cash flow. It also makes it easier to track deductible expenses and reconcile your transactions at year end.

Set up accounting and bookkeeping

Good financial records are a legal requirement in Ireland, not just good practice. You must retain all business records for a minimum of six years.

Choose accounting software that tracks income, expenses, and VAT automatically. This saves time and helps you stay compliant with Revenue's requirements.

Understand ongoing filing obligations

Limited companies must file their first annual return (Form B1) within six months of incorporation. After that, returns are due every 12 months. Late filing attracts a penalty of €100 plus €3 per day, and it can also result in losing your audit exemption for two years.

Sole traders and partnerships must file an annual income tax return (Form 11) by mid-November each year if filing through ROS. Preliminary tax payments are also required, typically by 31 October. Keeping accurate records throughout the year makes these filings much faster.

Register with the RBO

All Irish companies and certain other legal entities must register their beneficial owners with the Register of Beneficial Ownership (RBO). A beneficial owner is anyone who holds more than 25% of the shares or voting rights, or who otherwise exercises control over the company.

You have five months from the date of incorporation to file. The filing is done online through the RBO's portal. Failure to register is a criminal offence, and the company and its officers can face fines of up to €500,000.

Common mistakes to avoid when registering a business in Ireland

A smooth registration process comes down to preparation. Here are the most common pitfalls and how to avoid them:

• Skipping the business name search: Filing a name that's already taken or too similar to an existing one means the CRO will reject your application. Always search the register on core.cro.ie first.
• Forgetting to register for tax separately: CRO registration and tax registration are two different processes. Your business isn't fully set up until you complete both.
• Missing the EEA director requirement: Limited companies need at least one director resident in the EEA. If all directors live outside the EEA, you'll need a Section 137 bond, which costs approximately €1,600 to €2,000 for a two-year period.
• Using a PO Box as your registered office: The CRO requires a physical Irish address. Applications with a PO Box will be rejected.
• Missing your first annual return deadline: Your first Form B1 is due six months after incorporation. Missing it triggers penalties and can affect your financial reporting obligations.
• Delaying RBO registration: You have five months from incorporation to register beneficial owners. Late registration can result in prosecution.
• Choosing the wrong business structure: Switching from sole trader to limited company later involves additional costs and paperwork. Take time upfront to choose the structure that fits your growth plans and risk appetite.
• Overlooking employer registration: If you plan to hire staff, you must register as an employer with Revenue before your first employee starts. This is a separate registration from your income tax or corporation tax setup.

Simplify your startup finances with Xero

Starting a business in Ireland means juggling registration, tax, and compliance all at once. Xero's cloud accounting software helps you stay on top of your finances from day one, with automated bank reconciliation, invoicing, and real-time reporting.

Whether you're registering as a sole trader or incorporating a limited company, Xero makes it easier to manage your books, track expenses, and stay compliant with Revenue.

Get one month free

FAQs on registering a business in Ireland

Here are answers to some of the most common questions about business registration in Ireland.

How long does it take to register a business in Ireland?

Sole trader registration through ROS can be completed in one to two business days. Limited company incorporation via the CORE portal typically takes three to five business days, provided all documents are in order.

Can a foreigner register a business in Ireland?

Yes. Non-Irish nationals can register a business in Ireland. For limited companies, at least one director must be resident in the EEA, or the company must obtain a Section 137 bond.

Sole traders don't have a residency requirement, but you'll need a Personal Public Service (PPS) number to register for tax.

Do I need a PPS number to register a business?

You need a PPS number to register for tax with Revenue, which is a required step for all business types. If you don't have one, you can apply through your local Intreo centre. Non-residents may be able to apply by post.

What is the difference between a sole trader and a limited company?

A sole trader and the business are the same legal entity, meaning you carry personal liability for all debts. A limited company is a separate legal entity, so your personal assets are protected.

Limited companies pay corporation tax at 12.5%, while sole traders pay income tax at marginal rates up to 40%, plus USC and PRSI.

Do I need to register for VAT?

You must register for VAT if your turnover exceeds €42,500 for services or €85,000 for goods. Below these thresholds, registration is voluntary.

Registering voluntarily can be beneficial if most of your customers are VAT-registered businesses, as it allows you to reclaim VAT on business expenses.