Starting a Business in Ireland? Here Is What No One Tells You About Compliance
You have the idea. You have the drive. You might even have your first customer lined up.
But between registering your company and issuing your first invoice, there is a maze of compliance obligations that catches many Irish founders off guard — Revenue registrations, CRO deadlines, VAT thresholds, payroll requirements, and beneficial ownership filings. Miss one, and you are looking at penalties, surcharges, and the kind of paperwork headache that eats into time you should be spending on your business.
This guide is a plain-English walkthrough of every accounting and compliance step a new Irish limited company needs to take, in the right order, so you can focus on building rather than firefighting.
Sole trader or limited company? Almost everything below applies to Irish Private Limited Companies (LTDs). If you are trading as a sole trader, your obligations differ — particularly around income tax (Form 11 vs PAYE), legal liability and accounting requirements. If you are deciding between the two structures, speak to an accountant before you start trading. The right structure depends on your turnover, risk profile and growth plans.
Step 1: Register Your Company With the CRO
Before anything else, your business needs a legal structure. Most Irish startups incorporate as a Private Limited Company (LTD) — it gives you limited liability, a professional profile, and the ability to access business banking and contracts.
Company registration is handled by the Companies Registration Office (CRO) at cro.ie. You will need:
- A company name — checked against the CRO register; duplicates are rejected
- At least one director — who must be EEA-resident, or the company must hold a Section 137 bond
- A registered office address in Ireland
- A company secretary — note that if the company has only one director, that director cannot also act as company secretary
Annual return dates — what founders regularly miss
Your company’s first Annual Return Date (ARD) falls six months after the date of incorporation. Importantly, no financial statements are required with this first B1 return — only the form itself must be filed. Subsequent B1 returns fall annually from that ARD and must include financial statements.
Under the rules applicable since 16 July 2025, a single late annual return no longer automatically causes loss of audit exemption. A company now generally loses audit exemption for the following two years where it files late more than once within a five-year period. This is a meaningful change from the previous position, but filing on time remains strongly advisable — late filing fees apply regardless, and the consequences of repeated lateness remain serious.
Step 2: Register Your Beneficial Ownership (RBO)
This step is missed by a significant number of newly incorporated companies, and the consequences can include fines.
Within five months of incorporation, your company must register its beneficial ownership information on the Register of Beneficial Ownership (RBO) at rbo.gov.ie. A beneficial owner is generally any individual who ultimately owns or controls more than 25% of the shares or voting rights, or who otherwise exercises control over the company.
What you will need for each beneficial owner:
- Full name, date of birth and nationality
- Residential address
- Nature and extent of interest held
- PPS Number — or, where the individual does not have a PPS Number, a verified identity via the VIF (Verification of Identity Form) process
The RBO must also be updated whenever there is a relevant change in beneficial ownership. Failure to file within the deadline is an offence under the European Union (Anti-Money Laundering: Beneficial Ownership of Corporate Entities) Regulations.
Step 3: Register With Revenue
Incorporation at the CRO does not automatically register your company with Revenue. You need to register separately — via ROS (Revenue Online Service) — for each tax head that applies to your business:
- Corporation Tax (CT) — mandatory for all Irish limited companies from the date of incorporation
- Employer PAYE/PRSI — required as soon as you take on staff or pay a salary to a director
- VAT — see Step 4
Revenue registration is a separate process and can take time. Delays here can hold up your VAT registration and your ability to reclaim Irish input tax, so it is worth starting early.
Step 4: Understand Your VAT Position
VAT registration is mandatory in Ireland once your turnover exceeds:
- €85,000 for the supply of goods
- €42,500 for the supply of services
These thresholds took effect from 1 January 2025 (increased from €80,000 and €40,000 respectively) and remain in force as of the date of this guide. You can also register voluntarily below these thresholds — which many startups do, particularly if they are selling to other VAT-registered businesses and wish to reclaim input VAT on their costs.
Cross-border and EU VAT considerations
If your company makes intra-Community distance sales of goods or supplies certain cross-border telecommunications, broadcasting or electronic (TBE) services to consumers in other EU Member States, the €10,000 annual threshold for cross-border B2C supplies is relevant. Once exceeded, VAT must be accounted for in each customer’s Member State — unless you register for the OSS (One Stop Shop) scheme in Ireland, which allows you to file all EU VAT centrally via Revenue.
EU VAT SME Scheme (from 1 January 2025): Qualifying small Irish businesses with EU-wide turnover not exceeding €100,000 may be able to use VAT exemptions in participating EU Member States, subject to national thresholds and conditions. This can offer meaningful administrative simplification for startups selling across the EU in small volumes.
Reverse charge VAT: Nearly every startup purchases services from abroad — Google, Meta, Microsoft, Shopify and other SaaS providers. Where you receive services from a non-Irish supplier and you are VAT-registered, the reverse charge mechanism typically applies: you account for the VAT yourself on your VAT3 return. This is commonly overlooked in early-stage bookkeeping.
Step 5: Set Up Your Bookkeeping System From the Start
Irish company law requires that every company keep proper books of account that correctly record and explain its transactions. This is a legal requirement — books must be retained for at least six years. Good bookkeeping also makes VAT returns, payroll submissions and annual accounts significantly faster and cheaper to prepare.
At Forti, we work with Xero, QuickBooks and Zoho Books. Cloud-based platforms give real-time visibility and allow us to collaborate on your records without emailing spreadsheets back and forth.
What your bookkeeping needs to capture from day one:
- All sales invoices issued
- All purchase invoices and receipts received and stored
- Bank transactions reconciled to your records
- Director expenses — with receipts; undocumented expenses are not allowable
- Payroll journals once payroll is running
- Director’s loan account movements
Director’s loan account: When a founder puts money into the company or takes money out outside of payroll or a declared dividend, this is typically recorded as a director’s loan. The tax treatment depends on the nature and timing of the transaction. Overdrawn director’s loan accounts can have PAYE implications — worth understanding early.
Pre-trading expenses: Certain costs incurred in the three years before trading commenced — wholly and exclusively for the purposes of the trade — may be allowable as deductions in the first trading period. Keep receipts from the very beginning.
Step 6: Payroll — Even If It Is Just You
Many founder-directors pay themselves a salary through the company’s payroll. This is normal and common, but it carries compliance obligations.
How payroll reporting works in 2026
Payroll in Ireland is reported under PAYE Modernisation, in place since January 2019. There are no P30 or P35 forms. Instead:
- Before or on the date employees (including directors) are paid, a payroll submission is made to Revenue reporting each individual’s pay, tax, PRSI and USC
- Revenue issues a monthly statement based on those submissions, which becomes the employer’s return
- PAYE, PRSI and USC are paid to Revenue on a monthly or quarterly basis depending on the employer’s arrangement
- Payslips must be issued to each employee for every pay period
- Revenue Payroll Notifications (RPNs) must be retrieved and applied before each payroll run — these replace the old tax credit certificates
My Future Fund auto-enrolment (from 1 January 2026)
Ireland’s new workplace pension scheme is now mandatory for eligible employees. An employee is generally automatically enrolled where they:
- Are aged between 23 and 60
- Earn more than €20,000 per year
- Are not already contributing to a qualifying pension arrangement through payroll
During Phase 1 (2026–2028), contributions are: Employee 1.5% | Employer 1.5% | State 0.5% — all based on gross earnings. Eligibility depends on each individual’s employment and pension circumstances. Not every company director automatically falls within the scheme.
BIK (Benefit in Kind) — company vehicles, health insurance and other benefits provided to directors or employees must be valued and reported through payroll. BIK is subject to PAYE, PRSI and USC.
Step 7: Know Your Corporation Tax Position
Irish companies pay Corporation Tax at 12.5% on trading profits — one of the most competitive rates in the EU. Non-trading income (such as investment or rental income) is generally taxed at 25%.
Section 486C Start-Up Relief
Qualifying new companies may be entitled to a reduction or elimination of their Corporation Tax liability under Section 486C TCA 1997. The relief is available for the first five years of a qualifying trade that commences on or before 31 December 2026. It is calculated by reference to qualifying employer PRSI paid:
- Up to €5,000 per qualifying employee (including directors paying Class A PRSI)
- Since 1 January 2025, a director’s own Class S PRSI also qualifies, up to €1,000 per individual
- Aggregate PRSI relief cap: €40,000 per year
Full relief applies where the CT liability does not exceed the PRSI cap. Marginal relief applies where the CT liability falls between the PRSI amount and €40,000 above it. This is a genuine Revenue-sanctioned relief that many startups do not claim simply because they are not aware of it.
Preliminary Corporation Tax — important startup exemption
New companies do not have to pay Preliminary Corporation Tax in their first accounting period where the CT liability for that period is below €200,000. The full CT liability is instead paid when the CT1 return is filed. This is a meaningful cash-flow benefit that many early-stage founders are not aware of.
Your CT1 is due nine months after your accounting year-end (no later than the 23rd of that month for ROS filers). A company with a 31 December year-end must file by 23 September the following year.
Step 8: Annual Compliance — The Recurring Calendar
Once you are set up and trading, your compliance calendar looks like this:
| Obligation | Frequency | Filed With |
|---|---|---|
| VAT3 Return | Generally bi-monthly (other periods may apply) | Revenue |
| Payroll Submission | On or before each pay date | Revenue |
| PAYE/PRSI/USC Payment | Monthly or quarterly | Revenue |
| CRO Annual Return (B1) | Annual — first ARD 6 months after incorporation | CRO |
| Corporation Tax Return (CT1) | Annual — 9 months after year-end | Revenue |
| Statutory Financial Statements | Annual | CRO / Revenue |
| RBO Update | As and when beneficial ownership changes | RBO |
| Form 11 (proprietary director) | Annual — where director is a chargeable person | Revenue |
Form 11 note: A proprietary director — broadly, a director who owns more than 15% of the company’s shares — is a chargeable person and must file a Form 11 income tax return annually via ROS. A non-proprietary director whose income is dealt with entirely through PAYE does not necessarily have the same obligation, but the position depends on individual circumstances.
Common Mistakes Irish Startups Make (and How to Avoid Them)
1. Not separating company and personal finances
A limited company is a separate legal entity. It should operate through a dedicated company bank account, with company and personal spending kept clearly separate from day one.
2. Missing the RBO five-month deadline
The Register of Beneficial Ownership obligation is not well-publicised. Many founders are unaware of it until year-end — by which point they are already in breach.
3. Not registering for VAT on time
Many startups realise they have exceeded the threshold only when preparing annual accounts — months after the obligation arose. Retrospective registration and back-payment of VAT is painful and costly.
4. Misunderstanding the first CRO annual return
The first B1 is due six months after incorporation — earlier than most expect. No financial statements are needed with that first return, but the return itself must still be filed on time.
5. Treating director withdrawals as salary without a payroll structure
Taking money from the company without a proper payroll, dividend or director loan structure creates PAYE and Revenue risk.
6. Ignoring reverse charge VAT on overseas services
Buying Google Ads, Shopify subscriptions or any other service from a non-Irish supplier while VAT-registered creates a reverse charge obligation. It is very commonly missed in early-stage bookkeeping.
7. Not understanding My Future Fund eligibility
Auto-enrolment is now live. Failing to assess employee eligibility and make contributions on time will result in compliance breaches.
Ready to Get Your Compliance Right From the Start?
Whether you are incorporating next week or already trading and trying to get on top of your obligations, Forti can help. Book a free 30-minute consultation with our team. We will review your current position, identify any gaps, and give you a clear plan — with no obligation and no jargon.
Frequently Asked Questions
You do not legally need an accountant to incorporate, but professional support saves time, avoids early structural mistakes, and ensures the company is set up tax-efficiently from day one.
The standard trading rate is 12.5%. Qualifying new companies may also be entitled to Section 486C Start-Up Relief, which can reduce or eliminate Corporation Tax in the first five years of trading.
VAT registration is mandatory once annual turnover exceeds €85,000 for goods or €42,500 for services (thresholds in effect since 1 January 2025). Voluntary registration below these thresholds is also possible and often advisable.
Your first Annual Return Date falls six months after incorporation. No financial statements are required with that first B1 — but the return itself must be filed on time.
My Future Fund is Ireland’s mandatory workplace pension auto-enrolment scheme, effective 1 January 2026. Eligible employees aged 23–60 earning over €20,000 are automatically enrolled. Phase 1 contributions: 1.5% employee, 1.5% employer, 0.5% State.
P30 and P35 were abolished in January 2019. Employers now submit payroll data to Revenue on or before each pay date. Revenue issues a monthly statement which serves as the employer return.
The Register of Beneficial Ownership requires companies to register details of individuals who ultimately own or control more than 25% of the company. The initial filing must be made within five months of incorporation.



