Ireland's 12.5% corporation tax rate is one of the primary reasons entrepreneurs and multinational companies choose to incorporate here. It's one of the lowest rates in the OECD, the EU, and the world — and it's been a cornerstone of Irish industrial policy for over two decades. But who actually qualifies? How does it interact with the new global minimum tax? And what's the difference between trading and non-trading income? This guide explains everything.
The 12.5% Rate: Who Qualifies?
The 12.5% corporation tax rate applies to trading income — the profits your company earns from its active business activities. This covers the vast majority of Irish companies, from tech startups to consultancies to e-commerce businesses.
To qualify, your company must:
- Be registered in Ireland with the Companies Registration Office (CRO)
- Be tax-resident in Ireland — generally means the company is managed and controlled from Ireland
- Earn profits from active trading (not passive investment)
Both Irish residents and non-residents who form companies in Ireland can benefit from this rate, provided the company meets the residency and trading conditions.
Trading Income vs Non-Trading Income
This distinction is critical because the tax rates are very different:
| Income Type | Tax Rate | Examples |
|---|---|---|
| Trading Income | 12.5% | Sales revenue, consultancy fees, SaaS subscriptions, e-commerce sales, professional services |
| Non-Trading (Passive) Income | 25% | Rental income, investment income, deposit interest, royalties from non-active sources |
| Capital Gains | 33% | Gains from selling assets, property, shares |
The key takeaway: if your company is actively trading (which most businesses are), you pay 12.5%. Setting up a company purely to hold investments passively will attract the higher 25% rate.
How Ireland Compares Internationally
Ireland's rate is significantly lower than most European and global competitors:
- UK — 25% (for profits over £250,000)
- Germany — approximately 30% (combined federal + trade tax)
- France — 25%
- Netherlands — 25.8% (above €200,000)
- US — 21% federal (plus state taxes)
- Ireland — 12.5%
This competitive rate, combined with Ireland's position as an English-speaking EU member, makes it exceptionally attractive for international entrepreneurs. Read about all the benefits of forming a company in Ireland.
The OECD Pillar Two Global Minimum Tax
In 2024, Ireland implemented the OECD Pillar Two rules, which set a global minimum effective tax rate of 15% for large multinational groups with consolidated revenues over €750 million. What this means in practice:
- The 12.5% rate still applies to all Irish companies below the €750 million threshold
- For qualifying large multinationals, Ireland applies a domestic top-up tax to bring the effective rate to 15%
- For the vast majority of SMEs, startups, and small businesses, the 12.5% rate is unchanged and will remain so
The Irish government has explicitly committed to maintaining the 12.5% rate for businesses below the Pillar Two thresholds. For small and medium businesses, nothing has changed.
Additional Tax Incentives
Beyond the headline rate, Ireland offers several powerful tax incentives:
R&D Tax Credit (25%)
Companies undertaking qualifying research and development activities can claim a 25% tax credit on R&D expenditure. Combined with the 12.5% deduction for the expense itself, the effective benefit can reduce the net cost of R&D significantly.
Knowledge Development Box (KDB)
Profits arising from qualifying intellectual property developed in Ireland can be taxed at an effective rate of just 6.25% — half the standard rate.
Start-Up Relief
New companies in their first three years of trading may qualify for relief from corporation tax if their total tax liability in a year does not exceed €40,000. Marginal relief applies for liabilities between €40,000 and €60,000.
Employment and Investment Incentive Scheme (EIIS)
Companies can raise up to €15 million from investors who receive income tax relief on their investment, making it easier for startups to attract funding.
How to Register for Corporation Tax
After registering your company with the CRO, you must register for Corporation Tax with the Revenue Commissioners. The process involves:
- Completing the TR2 form (tax registration for companies)
- Providing your CRO number and Certificate of Incorporation
- Specifying your accounting period end date
- Registering for additional taxes as needed (PAYE, VAT, etc.)
Our Tax Registration service handles this entire process for you, ensuring all registrations are completed correctly with Revenue.
Corporation Tax Payment and Filing Deadlines
- Preliminary tax — must be paid within 6 months of your accounting period end (small companies) or in two instalments for larger companies
- CT1 return — due within 9 months of the end of your accounting period
- Balance of tax — due with the CT1 return
- Late payment attracts interest at 0.0219% per day (approximately 8% per annum)
Common Questions
Can a sole trader benefit from the 12.5% rate?
No. The 12.5% rate is only available to incorporated companies. Sole traders pay personal income tax rates of 20%–40% plus USC and PRSI. This is one of the key reasons to choose a limited company over sole trader status.
Do I need to be Irish to benefit?
No. Any company that is tax-resident in Ireland benefits from the 12.5% rate on trading income. Non-residents can form Irish companies — see our non-resident company formation guide.
Is the 12.5% rate guaranteed to stay?
Ireland has maintained this rate since 2003, and successive governments of all parties have reaffirmed their commitment to it. For SMEs and businesses below the Pillar Two thresholds, the rate is expected to remain at 12.5% for the foreseeable future.
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