Company Setup Checklist Ireland 2026: CRO to Revenue

Business Formation Team, 2026-02-02

If you’re searching for a company setup checklist Ireland 2026, you probably want one thing: a clear, practical order of steps from “idea” to “legally trading” without missing anything that later causes Revenue letters, VAT headaches, or payroll mess. This guide answers that directly in the first few minutes: incorporate with the Companies Registration Office (CRO), register the right tax heads with Revenue, set up payroll properly (if hiring), and put basic compliance systems in place before your first invoice.

You can follow this checklist whether you’re a first-time founder, moving from sole trader to limited company, or setting up a new Irish entity for a growing business.

Disclaimer: This is practical guidance, not legal or tax advice. Rules and requirements can vary depending on your sector (construction RCT, regulated activities, cross-border VAT, property, financial services), ownership structure, and your specific facts. For tailored advice, consult a qualified professional and refer to official guidance from Irish authorities.

1. First decision: Sole trader or limited company in 2026?

Before you file anything, decide whether you’re operating as a sole trader or setting up a limited company (LTD). Many Irish business owners start as sole traders and incorporate later, but in 2026 it’s worth deciding upfront because it affects liability, tax treatment, credibility, and admin.

Practical tip: If you’re bidding on larger contracts (construction, agencies, B2B services), the LTD structure often helps with credibility and risk management—but it adds compliance obligations. Decide with your medium-term plan in mind, not just “what’s fastest”.

2. CRO incorporation checklist (Ireland 2026)

If you’re setting up a limited company, the CRO step comes first. In plain English: you submit an application to incorporate, include the right declarations, appoint the right officers, and file the constitution. Most founders complete this online via CORE.

2.1 What you need before you start

• Company name (and alternatives in case your first choice is unavailable)

• Registered office address (official address for legal notices)

• Directors and company secretary details and consents

• Share structure (who owns what, number of shares, subscribers)

• Company constitution (LTD constitution, signed)

• EEA-resident director requirement planning (or a bond, if required)

2.2 CRO forms and documents (what they do)

2.3 Step-by-step CRO incorporation process

1. Reserve/confirm your name (and prepare 2–3 backup names).

2. Set your registered office (must be an Irish address for Irish companies).

3. Appoint directors and a secretary and ensure consents are signed/recorded.

4. Decide the share structure (keep it simple at the start unless you have investors).

5. Prepare the constitution and ensure it is correctly signed.

6. File online via CORE with A1 + G5 + constitution (and bond if required).

7. Receive your CRO number and incorporation confirmation once approved.

Warning: The most common incorporation delays are (1) incomplete director/secretary details, (2) issues with the constitution signatures, and (3) missing the bond requirement where it applies. Double-check those before submitting.

3. Revenue registrations checklist (tax heads you may need)

Once the company exists (you have the CRO number), the next part of the company setup checklist Ireland 2026 is Revenue registration. You typically register the tax heads that apply to your activity and how you trade.

3.1 The main Revenue registrations for most SMEs

3.2 VAT registration in Ireland (2026 thresholds you must know)

In 2026, VAT registration is generally obligatory once you exceed the relevant threshold:

• €42,500 for businesses supplying services only

• €85,000 for businesses supplying goods (and many mixed-supply cases where goods dominate)

Even below the thresholds, you may elect to register in certain situations (for example, B2B clients expect VAT invoices or you want to reclaim VAT on inputs).

Tip: VAT isn’t only about “charging 23%”. It affects pricing, invoicing, cash flow, and deadlines. If you’re close to the threshold or scaling quickly, plan VAT before it becomes urgent.

3.3 ROS access (don’t leave this until the last minute)

Most tax filing and payments happen through ROS (Revenue Online Service). In practice, delays in setting up ROS access cause missed deadlines—especially for first-time founders who only think about it when the first VAT3 or payroll payment is due.

Action: Set up your Revenue access early, confirm your organisation details, and ensure the person responsible for compliance can log in and file.

4. Payroll setup in Ireland 2026 (what “good” looks like)

If you’ll pay anyone—staff or directors—payroll needs to be configured correctly from day one. Irish payroll is tightly linked to Revenue reporting, so errors become visible quickly.

4.1 Employer payroll checklist

1. Register as an employer with Revenue before the first pay date.

2. Choose pay frequency (weekly/fortnightly/monthly) and stick to it unless you have a reason to change.

3. Collect employee details properly (start date, PPSN, address, contract terms).

4. Decide payroll responsibilities: in-house, bureau, or accountant—then document the process.

5. Set an approval routine: who approves hours, who approves net pay, who releases payments.

6. Plan statutory obligations (holiday pay, sick pay policies, pension/auto-enrolment responsibilities).

4.2 2026 note: Auto-enrolment pensions

Ireland’s national auto-enrolment retirement savings scheme (MyFutureFund) begins from 1 January 2026. If you employ eligible staff, payroll processes must be ready to support enrolment and contributions as required. Treat this as part of your 2026 payroll “baseline compliance”.

Practical tip: Even if your headcount is small, write down your payroll process (inputs → approval → payslips → payment → filing → reconciliation). That single page saves you when you hire your 5th, 10th, or 20th employee.

5. VAT, deadlines, and compliance routines (what to set up before you trade)

Most Irish SMEs don’t fail because of a lack of effort—they fail because compliance is handled “later”, then later becomes penalties, missed filings, and stress. Set up the routine early.

5.1 The VAT3 deadline rule you should remember

As a general rule, VAT returns and payments are due by the 19th of the month after the taxable period ends, and the deadline is typically extended to the 23rd for ROS filers.

5.2 A simple “monthly close” routine for small companies

• Weekly: upload/record receipts, reconcile payments, file supplier invoices

• Monthly: reconcile bank, review VAT positions, review debtors/creditors, store key documents

• Quarterly: review pricing, tax estimates, and cash flow; sanity-check compliance

5.3 Record-keeping and audit readiness

You don’t need to build a “big company” finance department. But you do need to keep records in an organised way so you can answer simple questions quickly:

• What did we invoice and collect?

• What expenses are supported by receipts?

• What VAT did we charge/claim and why?

• Are payroll costs correctly recorded?

Warning: “I’ll find the receipt later” is the most expensive sentence in small business. Build a habit: record it once, correctly, and keep it linked to the transaction.

6. 30-day company setup timeline (Ireland 2026)

If you want a realistic execution plan, here’s a simple 30-day timeline. You can move faster, but this avoids gaps.

7. Common mistakes founders make (and how to avoid them)

1. Setting up the company but ignoring Revenue registrations
   Fix: Treat CRO as step 1, not the finish line.

2. Delaying ROS setup until a deadline arrives
   Fix: Set up access during week 2, not “when needed”.

3. Not planning VAT until after crossing the threshold
   Fix: Monitor turnover monthly; decide early if voluntary registration helps you.

4. Payroll run before employer registration is correct
   Fix: Register as employer and test the process before first pay day.

5. No system for receipts and invoices
   Fix: Set a weekly admin slot and use a tool that makes it effortless.

Frequently Asked Questions

How do I register a company in Ireland in 2026?

To register a limited company in Ireland in 2026, you incorporate through the CRO (commonly via CORE) using Form A1 and a Declaration of Compliance (G5), file a signed constitution, and meet director/registered office requirements. Once incorporated, you then register the relevant tax heads with Revenue (typically Corporation Tax, and VAT/PAYE depending on your business).

How long does CRO company registration take?

Processing times vary depending on filing method and whether your submission is complete. In practice, delays are often caused by incomplete officer details, constitution issues, or missing bond requirements where relevant. The fastest path is a correct first submission via CORE.

Do I need to register for VAT in Ireland in 2026?

VAT registration is generally required when your turnover exceeds the relevant thresholds (for example, €42,500 for services-only and €85,000 for goods in many cases). If you are below the thresholds, you may still choose to register voluntarily depending on your clients and costs.

What is the VAT3 deadline in Ireland?

VAT returns and payments are generally due by the 19th of the month after the taxable period ends, with an extension typically available to the 23rd for ROS filers. Always confirm your taxable period and ROS status so you don’t miss the correct date.

How do I register as an employer for PAYE in Ireland?

If you will pay staff (or directors through payroll), you must register for employer PAYE/PRSI with Revenue before your first payroll run. Your payroll process should include approvals, correct employee details, and routine reconciliation after each pay period.

Do construction businesses need RCT registration?

If your company operates in construction and pays subcontractors, you may need to register and operate Relevant Contracts Tax (RCT). Because RCT is operational and compliance-critical, construction businesses should treat this as a day-one setup item.

What should I set up before I issue my first invoice?

Before your first invoice, set up: invoicing rules (VAT treatment if applicable), receipt capture, a bank reconciliation routine, and a simple monthly close checklist. These steps make VAT, payroll, and year-end filings dramatically easier.

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Last updated: February 2026

This guide is for informational purposes only and does not constitute professional advice. For your specific circumstances, consult a qualified adviser and refer to official Irish guidance from Revenue and the CRO.