Think you already qualify for Ireland's 12.5% Corporation Tax rate just because your company is incorporated here? A lot of founders assume exactly that, and it's a costly assumption to get wrong. If Revenue decides your company isn't genuinely tax resident, that low rate can be clawed back, along with the certainty you thought you had.
Here's the reassuring part: qualifying isn't complicated once you know what Revenue is looking for. At Kinore, we're a larger, senior-led team with dedicated client managers, not a sole practitioner juggling everything alone, and we field this exact question every week. This guide covers who qualifies, the residency tests Revenue applies, the records you should keep, and how the return is filed.
What is Ireland's 12.5% Corporation Tax rate?
Corporation Tax in Ireland isn't a single flat rate. According to Revenue, it depends on the type of income your company earns.
|
Rate |
Applies to |
|
12.5% |
Trading (active) income: profits from selling your products or services |
|
25% |
Non-trading (passive) income, for example rental income or investment returns |
|
10% |
Profits under the Knowledge Development Box (KDB), such as income from qualifying patents or copyrighted software |
A tax resident company pays Corporation Tax on its worldwide income and profits, not just what it earns in Ireland.
Worth flagging: even the KDB rate isn't fixed forever. It moved from 6.25% to 10% on 1 October 2023, when Revenue reduced the qualifying profit deduction from 50% to 20%. If you're relying on KDB relief for IP income, check the current rate before you build it into a forecast; it's exactly the kind of detail that quietly goes out of date.
A quick worked example. Say your company reports €500,000 in trading profit for the year. At 12.5%, your Corporation Tax bill comes to €62,500. Now imagine €50,000 of that €500,000 is rental income from a spare office you sublet, rather than trading profit. That portion is taxed separately at 25%, giving €12,500, while the remaining €450,000 of genuine trading profit is taxed at 12.5%, giving €56,250. Add those together and you're looking at €68,750 rather than the €62,500 you might have assumed if you'd applied the lower rate to everything. It's a useful reminder that mixing trading and non-trading income in the same company can quietly push your effective tax rate up, and it's worth knowing which of your income streams fall into which category before you file.
Who qualifies as a tax resident company?
Only "Tax Resident Companies" are liable for Irish Corporation Tax: companies incorporated here, plus international businesses whose management is substantially based here, including UK companies relocating and new startups setting up for the first time.
The tax residency test: incorporated and "centrally managed and controlled"
Revenue applies two main tests:
- The company must be incorporated in Ireland.
- The company must be centrally managed and controlled in Ireland, which usually means the majority of directors are Irish residents.
If your company is set up and actively trading in Ireland, you'll likely qualify. Your customers don't all need to be based here: you're free to trade globally, and income doesn't have to land in an Irish bank account. It can, for example, arrive in US dollars via PayPal.
How to prove your company is tax resident in Ireland
It's tempting to think that proving residency invites more scrutiny. In practice, it's the opposite: clean records make your return faster to prepare, not slower.
Keep your books and records for a minimum of six years, showing that your company is actively trading and genuinely controlled from Ireland. That's usually more than an Irish office, incorporation, or an Irish accountant. Revenue critically assesses your company against its residency rules, so it's worth checking these directly, especially if directors live outside Ireland.
Online accounting software helps you manage cash flow, invoices and receipts. If residency is a concern, keep more than the minimum required for bookkeeping.
What records show tax residency?
- Rent payments or invoices for office space, showing a genuine head office rather than a mail-forwarding address.
- Flight records or proof-of-address documents showing directors live in, or have a strong presence in, Ireland.
- Signed minutes clearly showing board meetings were held in Ireland.
Where is your company "centrally managed and controlled"?
Ask yourself:
- Where is policy decided? Where are agreements with suppliers, clients or partners made and documented?
- Where is the head office? Where do directors live, and where do board meetings take place?
- Where are your employees? If you live outside Ireland, flight records help track your presence here.
- Where are your customers and suppliers? Invoices and stock locations help show genuine trading with Irish businesses.
Real-world examples: does your company qualify?
Lukas is an IT programmer from Lithuania. His company is incorporated in Ireland with an official Irish address, but all business, staff and board meetings are in Lithuania. It won't qualify for the 12.5% rate.
Mia is a software engineer from Croatia with clients in Croatia, Ireland and elsewhere. She lives in Dublin, works from a home office, and her board meets and keeps its records there too. Her company should qualify.
Shauna runs an international business consultancy. She travels frequently and keeps office addresses in New York and London, but mainly resides in Cork, where her head office and staff are based, and where her records are kept. Most directors are Irish and the board meets here, so her company should also qualify.
Filing your Corporation Tax return
Corporation Tax returns are prepared on a self-assessment basis through the Revenue Online Service (ROS). You'll need to know which rate applies to your income to file and pay correctly, and to avoid under-declaring your tax bill. Dates depend on your company's accounting year end, so confirm your specific dates rather than assuming a generic deadline applies.
That said, the general pattern is consistent even if the exact calendar date shifts with your year end. Your Form CT1 return is due nine months after the end of your accounting period, and if you're filing through ROS, which is mandatory for the vast majority of companies, both the return and any balance of tax owed must be submitted by the 23rd of that ninth month, according to Revenue. Miss it and the surcharges are steep: 5% of the tax due, capped at €12,695, if you're within two months of the deadline, rising to 10%, capped at €63,485, if you're later than that. Late filing can also restrict your ability to claim certain loss relief and capital allowances, so it isn't a deadline worth treating casually.
Preliminary tax: what it is and when it's due
Before you file the CT1 itself, most companies owe preliminary tax: an estimated payment made during the accounting period rather than after it. Whether you count as a "small" or "large" company for this purpose depends on your Corporation Tax liability in the previous accounting period, with the line drawn at €200,000, according to Revenue.
|
Company size |
Threshold |
When preliminary tax is due |
|
Small company |
Corporation Tax liability of €200,000 or less in the prior accounting period |
One payment, due 31 days before your accounting period ends, and no later than the 23rd of that month |
|
Large company |
Corporation Tax liability above €200,000 in the prior accounting period |
Two instalments: the 23rd of month six, then the 23rd of month eleven, bringing the total to 90% of the final liability |
|
Start-up company |
First accounting period, Corporation Tax liability under €200,000 |
No preliminary tax due; pay the full amount when you submit your CT1 |
Source: Revenue, when is preliminary Corporation Tax due.
If you're newly incorporated and still finding your feet with Irish compliance, this is exactly the kind of deadline that's easy to lose track of while you're focused on winning customers rather than watching a calendar. It's why a dedicated team is worth having in your corner well before the date arrives, not just once it's already looming.
Tax obligations in other countries
Paying Corporation Tax in Ireland doesn't remove tax obligations elsewhere. A business can have tax liabilities in more than one country, and Irish residency doesn't negate the duty to pay tax wherever else the business operates. If you're trading across borders, get this checked properly rather than assuming Irish compliance covers everything.
How does Ireland's 12.5% rate compare internationally?
Ireland's rate is historically low. Germany's sits at 15%, France's at 28%, and Spain's at 25%. That gap has made Ireland an attractive base for foreign investment, though it remains a point of ongoing discussion within the EU.
FAQ
Do Irish branches pay Corporation Tax in Ireland? Yes. Irish branches of foreign companies are liable for 12.5% Corporation Tax on profits connected with that branch's business.
What defines active trading for Ireland's Corporation Tax? Active trading means conducting business within Ireland on a regular, substantial and continuous basis: buying and selling goods or services. Revenue typically looks for a physical presence, employed staff, and genuine business activity carried out in the country.
How does Ireland's corporate tax rate compare internationally? At 12.5%, Ireland's standard rate is well below many other developed economies, though your actual tax bill will vary depending on the incentives, deductions and credits available to your business.
How much is Corporation Tax in Ireland? It depends on the income type: 12.5% on trading income, 25% on passive income such as rents or investments, and 10% on qualifying Knowledge Development Box profits.
Who pays Corporation Tax in Ireland? Companies classified as tax resident in Ireland, whether Irish-incorporated or internationally managed businesses with substantial operations here, pay Corporation Tax on their worldwide income.
When is preliminary Corporation Tax due? It depends on your company's size. Small companies, those with a Corporation Tax liability of €200,000 or less in the prior accounting period, pay in a single instalment due 31 days before the accounting period ends. Large companies split the payment into two instalments, due on the 23rd of month six and the 23rd of month eleven of the accounting period. Start-up companies with a liability under €200,000 skip preliminary tax entirely in their first period and settle the full amount when they file their CT1.
Talk to Kinore
Qualifying for the 12.5% Corporation Tax rate comes down to genuine, provable residency, not just an Irish address. If you're setting up a company in Ireland, relocating an existing business, or want a second opinion on your residency position, talk to Kinore. Call us on 01 905 9364, email hello@kinore.com, or book a discovery call to get started.
The information provided in this article is for general guidance and informational purposes only. It does not constitute professional accounting, tax, or financial advice, and should not be relied upon as a substitute for advice tailored to your specific circumstances. While we take care to ensure the content is accurate and up to date at the time of publication, legislation, tax rates, thresholds, and compliance requirements in Ireland can change.
