The Idea Is Only the Beginning
Starting a business in Ireland is genuinely more accessible than most first-time founders expect. The country has one of the more straightforward company registration systems in Europe, a Revenue authority that has invested heavily in online self-service, and a Local Enterprise Office network that provides real, free support to anyone starting out. That said, the process has a definite sequence, and getting one step wrong — the wrong business structure, a missed tax registration deadline, a company name that's already taken — creates problems that are much more expensive to fix later than to avoid in the first place. This guide walks through every step, in order, with every cost verified for 2026.
Step 1: Decide on Your Business Structure
The very first decision, and one of the most consequential, is whether you operate as a sole trader or form a limited company. Both are legitimate, widely used structures in Ireland, but they have fundamentally different implications for your legal liability, your tax obligations and your administrative burden.
A sole trader is the simplest structure: you trade in your own name (or a registered business name), you pay Income Tax, USC and PRSI on your profits through the self-assessment system, and your personal assets are not legally separated from your business assets. If the business runs into trouble, your personal finances are exposed. The setup cost is minimal — as low as zero if you trade under your own name, or €20 to register a business name with the CRO if you want a trading name different from your own. The administrative overhead is lighter: one Form 11 per year through Revenue's Online Service (ROS), a self-assessment income tax return, and VAT returns if you breach the relevant threshold.
A limited company is a separate legal entity, distinct from you as a person. Your liability as a shareholder is limited to what you invested in the company — your personal assets are protected if the business fails. The company pays Corporation Tax at 12.5% on trading profits, rather than your personal income tax rate of 20% or 40%. This becomes a significant advantage once profits consistently exceed approximately €50,000-€60,000 per year, at which point the savings from retaining profit inside a company at 12.5% rather than paying income tax at 40% become meaningful. The trade-off is more compliance: CRO annual returns, a Corporation Tax return (CT1), VAT returns, iXBRL-tagged financial statements, and an accountant who understands all of the above. Almost all business advisers recommend starting as a sole trader and incorporating when growth makes it worthwhile, unless you're in a business where personal liability exposure is a concern from day one.
Step 2: Check Your Company Name and Register It
Before anything else, check that your preferred name is available. Go to the CRO's free search tool at cro.ie and search the register. The name must be unique and clearly distinguishable from all other registered company and business names — not just spelled differently, but genuinely distinct. The CRO applies strict guidelines, and if your proposed name is too similar to an existing registration, your application will be returned and you'll have to start over.
If you're forming a limited company, the name must end in "Limited" or "Teoranta" (or their respective abbreviations). If you're a sole trader trading under a name other than your own personal name, you must register that business name with the CRO for a fee of €20 online. This is separate from company formation — it's simply registering the trading name so it appears on the public register and you have legal standing to use it in commerce.
It's also worth running a trademark check through the Intellectual Property Office of Ireland (ipoi.gov.ie) to confirm your preferred name isn't already protected as a trademark in your sector. This is free to search and could save you a significant headache later.
Step 3: Form the Company (Limited Company Only)
To register a private limited company (LTD) in Ireland, you need a minimum of one director (though two are strongly recommended — if there is only one, a separate company secretary must be appointed, who cannot be the same person as the sole director). At least one director must be resident in the European Economic Area, or the company must take out a Section 137 Non-Resident Directors Bond — which costs approximately €2,000 and must be renewed every two years. You'll also need a company secretary (can be a second director, or an outsourced service at approximately €99-€150 per year), a registered office address in Ireland — a physical address where official CRO and Revenue correspondence will be received (your own address, your accountant's address, or a registered office service provider at typically €45-€270 per year) — and a completed Form A1 plus a Constitution document setting out the rules governing the company.
Filing is done through the CRO's online CORE portal (core.cro.ie). The CRO fee is €50 for online filing. Current processing time as of mid-2026 is approximately five to six working days. If you'd prefer not to deal with the paperwork yourself, formation agents handle the full process typically for €99-€300 plus the €50 CRO fee.
Once the Certificate of Incorporation is issued, the company legally exists from that date. You'll receive a CRO number and your certificate electronically through the CORE portal.
Step 4: Register with Revenue for Tax
This is not optional and has a deadline. You must register with Revenue within 30 days of commencing business, whether you're a sole trader or a limited company. Failing to register on time is a compliance risk — Revenue cross-references PRSI records, bank interest reports and VAT registrations.
For a sole trader, you register using Form TR1 (available on ROS — Revenue's Online Service at ros.ie or myAccount for personal use). You'll select Income Tax (self-assessment) and, if applicable, VAT and as an employer. For a limited company, you use Form TR2. This registers the company for Corporation Tax, VAT (if applicable) and PAYE (if you have employees or are paying yourself a director's salary).
VAT registration becomes mandatory when your turnover exceeds — or is likely to exceed — €42,500 for services, or €85,000 for goods, on a rolling 12-month basis. Revenue monitors on a rolling basis, not a calendar year, so a large contract landing mid-year can push you over the threshold immediately. You can also register voluntarily below those thresholds — which makes sense if your clients are VAT-registered businesses who can reclaim the VAT you charge, or if you want to reclaim VAT on significant business purchases. Once VAT-registered, you file a VAT3 return typically every two months through ROS, and you pay the difference between VAT collected from clients and VAT paid on your own business purchases. The standard VAT rate in Ireland is 23%, with reduced rates of 13.5% and 9% applying to specific categories.
VAT returns are due bi-monthly. Missing them carries fixed penalties starting at €4,000 per infraction. Revenue can also backdate VAT liability to the date you should have registered — meaning you may owe VAT on past sales even if you didn't collect it.
Step 5: Register for the Central Register of Beneficial Ownership
Any limited company must register with the Central Register of Beneficial Ownership (RBO) at rbo.gov.ie within five months of incorporation. A beneficial owner is anyone who owns more than 25% of shares or exercises ultimate control over the company. Failing to register with the RBO within that five-month window is a criminal offence that can result in significant fines. If you use a formation agent and include RBO registration in their package, it's typically included at no extra cost or for a small additional fee (around €100 if taken separately).
Step 6: Open a Business Bank Account
A dedicated business bank account is essential — mixing personal and business finances creates chaos for your accountant and can cause problems with Revenue. The good news for Irish startups in 2026 is that both AIB and Bank of Ireland offer a two-year fee waiver on business accounts for new customers, which is a meaningful saving. AIB's Business Startup Package waives all maintenance and transaction fees for two years and is available to businesses operating for less than three years opening their first AIB Business Startup Current Account. Bank of Ireland similarly offers two years of complimentary Business Online access for new accounts. After the fee-free period, business account fees at AIB and Bank of Ireland run at approximately €4-€6 per month for a basic account. From July 2026, AIB is moving to a flat €6 per month fee structure.
For sole traders and limited companies that don't need to lodge cash or cheques and are comfortable with a fully digital offering, Revolut Business is a strong alternative. It offers a free business account with no monthly fee, accepts payments in over 30 currencies, and can be set up for both sole traders and limited companies. It does not deal with cash deposits, so if your business handles cash regularly a traditional bank remains necessary.
To open an account with AIB or Bank of Ireland, a limited company will need: the Certificate of Incorporation, the company's constitution, confirmation of RBO registration, photo ID and proof of address for directors, and in most cases an in-person meeting at a branch. Sole traders can apply online with AIB and typically need photo ID, proof of address, and proof of the business (such as the business name registration certificate).
Step 7: Hire an Accountant
This is the one professional relationship every business owner in Ireland needs from day one, and the one most people underinvest in. The complexity of Irish tax compliance — Form 11, CT1, CRO annual returns, VAT3, iXBRL financial statements, PAYE Modernisation — is high enough that the professional fee is almost always recovered in avoided penalties, identified deductions and time saved.
For a sole trader with straightforward income and no employees, expect to pay approximately €300-€800 per year for annual accounts and tax return preparation, plus €150-€300 per VAT return if VAT registered. For a limited company, annual compliance packages typically run from €900-€3,500 per year depending on transaction volume and whether payroll is included, or €195-€450 per month on a retainer model that covers VAT returns, payroll, annual accounts, CT1 and CRO B1 filing. Startup accounting packages are available from some firms at reduced rates for the first 18 months — TAS Consulting, for example, advertises a comprehensive limited company package at €165 plus VAT per month for the first 18 months.
Accounting fees are 100% tax-deductible as a legitimate business expense. If you use cloud accounting software — Xero, QuickBooks or Sage — and keep clean, well-organised records, your accountant will charge less, because clean books take less time to work with. That's worth doing from the first month of trading.
One critical deadline to know immediately: the CRO annual return (Form B1) for a limited company is due every year on the anniversary of incorporation. Miss it by a single day and you incur a €100 penalty, then €3 per day. Miss it more than once in any five-year period and you lose your audit exemption for two years — triggering a statutory audit that can cost €2,000-€3,000 per year. Set a reminder the day you incorporate.
Step 8: Get Your Legal and Insurance Basics in Place
Every business, regardless of size, needs at minimum three things sorted before trading.
Public liability insurance covers you if a client, customer or member of the public suffers injury or property damage connected to your business. Premiums vary enormously by sector — a freelance writer pays very little; a construction company pays significantly more. Get at least three quotes from insurance brokers.
A basic terms and conditions or client contract document sets out how you work, your payment terms, what happens if a client doesn't pay, and who owns intellectual property created during the engagement. A solicitor can draft a standard contract for approximately €200-€500 that you then reuse across all clients.
Data protection registration is required if you process personal data about clients, customers or employees. Most businesses in Ireland need to register with the Data Protection Commission (dataprotection.ie). Registration is free.
Step 9: Set Up Your Practical Business Infrastructure
By this point your company is legally formed, tax-registered, banked and insured. What remains is the practical infrastructure that makes the business actually function day-to-day.
A professional domain name and email address cost approximately €10-€20 per year for the domain and €5-€15 per month for professional email hosting (such as Google Workspace or Microsoft 365). Namecheap and Blacknight are among the main Irish-focused domain registrars.
Business insurance policies beyond basic public liability — professional indemnity insurance if you're providing professional advice or services, employers' liability if you have staff — should be in place before you take on clients.
If you're renting an office or commercial space, you'll need a solicitor to review any lease before signing. Commercial leases in Ireland can have significant clauses around personal guarantees, rent review mechanisms and repairing obligations that can be costly to be caught by. Solicitor fees for reviewing a commercial lease typically run from €500-€1,500 depending on the complexity of the agreement and the seniority of the solicitor involved.
Step 10: Ongoing Compliance — What You Need to Do Every Year
Once trading, there are recurring obligations that run on fixed annual and bi-monthly cycles.
For a sole trader: Preliminary Tax is due on or before 31 October each year, along with the Form 11 tax return for the previous year. The extended ROS online deadline in 2026 is 18 November. VAT returns, if VAT registered, are due bi-monthly.
For a limited company: Corporation Tax (CT1) is due nine months after your financial year end. Preliminary Corporation Tax is due on the 23rd of the month that is 31 days before your year end. The CRO B1 annual return is due on the anniversary of incorporation. VAT returns are bi-monthly. If you pay yourself a salary as a director, PAYE, USC and PRSI deductions must be submitted to Revenue monthly through the PAYE Modernisation system.
PRSI rates for employees increase to 4.35% from 1 October 2026, up from 4.2%. Pension auto-enrolment legislation passed in 2024 is being phased in through 2026 and 2027 — if you have employees, check with your accountant what obligations this creates for your business in the current phase.
What Does It All Actually Cost to Get Started?
For a sole trader with no employees, operating under their own name: effectively zero in registration fees, approximately €300-€500 in accountant fees in year one, plus insurance costs relevant to their sector.
For a sole trader registering a trading name: €20 CRO fee, plus the above.
For a limited company formed by an Irish resident: €50 CRO filing fee (or €99-€300 using a formation agent), plus registered office service if needed (€45-€270 per year), company secretary if needed (€99-€150 per year), and €900-€3,500 in accountant fees in year one. Two years of fee-free business banking under AIB or Bank of Ireland's startup packages makes the banking side costless for the first two years. Budget for one-off solicitor and insurance costs, and you're looking at a total first-year setup cost of approximately €1,500-€3,000 for a small limited company with no employees.
The Bottom Line
Starting a business in Ireland in 2026 is a well-structured, clearly sequenced process — but it has real deadlines, real penalties for missing them, and real costs that vary significantly depending on whether you operate as a sole trader or a limited company. The most common and most avoidable mistakes are trading without proper tax registration, missing the RBO five-month deadline, and skipping the accountant relationship to save money, only to find the saved fees are dwarfed by the cost of compliance errors. Get those three things right from day one, and everything else is manageable.
Business Pulse — Ireland's home for business intelligence, analysis and thought leadership. Subscribe to the Business Pulse Network Briefing.