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If you are a new director of a small, owner-operated company in Ireland, you may be exposed to the close company surcharge in Ireland without realising it. These rules result in an additional corporation tax charge under corporation tax in Ireland when certain types of income are retained rather than distributed to the shareholders of the company. The scale of the issue is significant: according to the Corporation Tax 2025 payments and 2024 returns report of Revenue, 7,090 companies reported a close company surcharge in 2024, generating €58.2 million in additional corporation tax.
If your company is controlled by five or fewer individuals, which is the case for most SMEs in Ireland, you may be subject to an additional corporation tax charge in the amount of 20%, and a 15% corporation tax charge applies to non-distributed rental, investment or professional income. This form of taxation is known as the close company surcharge, which serves to prevent owners from accumulating profits in their company for an unlimited amount of time. However, what is more dreadful is the fact that the additional charge may apply not in the year when the income occurs because it may turn up on the tax return of the following year.
This blog walks through the definition of a close company; explains the process of determining the close company surcharge of 20% and 15%; shows how to apply the €2,000 exemption and marginal relief; and, most importantly, gives details on the actions that could be taken to reduce or eliminate the charge.
What Is a Close Company in Ireland?
An Irish close company is an Irish resident company that is under the control of five or fewer participators or under the control of participators who are all directors (regardless of the number of directors). It is also a close company if, on a full distribution of its distributable income, more than 50% of that income would be payable to five or fewer participants or to participators who are directors.
A participator is anyone with shares, voting rights, or certain loan capital in the company. Most Irish owner-managed companies meet this test by default. Exclusions apply to non-resident companies, companies controlled by the state, and companies quoted on a stock exchange with sufficiently wide public ownership.
The Two Surcharges — 20% vs 15% Explained
There are two distinct close company surcharges in Ireland under Irish tax law, and it’s common for directors to only be aware of one of them. Both are designed to discourage close companies from retaining certain types of income rather than distributing it to shareholders.
20% Surcharge on Close Company
It is an anti-avoidance tax levy of 20% imposed on the undistributed estate and investment income (and franked investment income) of a close company if that income is not distributed to its participants (shareholders) as a dividend within 18 months from the end of the accounting period in which it was earned.
15% Surcharge on Close Company
An anti-avoidance tax levy of 15% imposed on 50% of the undistributed professional trading income of a close company in Ireland, applied if that income is not distributed to its shareholders as a dividend within 18 months from the end of the accounting period in which it was earned.
| 20% Surcharge (Section 440 TCA 1997) | 15% Service Company Surcharge (Section 441 TCA 1997) | |
| Applies to | Undistributed investment income (including Irish dividend income) and estate or rental income of any close company | Close companies whose main income derives from a profession, professional services, or the carrying on of an office or employment |
| Rate | 20% of undistributed investment or estate income, after tax | 15% on 50% of undistributed trading or professional income, plus the close company surcharge of 20% on any investment or estate income the company also holds |
| Trading deduction | A 7.5% deduction is available where the company mainly exists to carry on a trade | The same 7.5% deduction applies to the investment or estate income portion |
| Distribution window | 18 months from the end of the accounting period | 18 months from the end of the accounting period |
The key distinction is the type of income. A property investment or holding company will typically only ever face the 20% charge. A consultancy, agency, or professional practice — accountants, solicitors, medical practices, IT consultancies, and similar service businesses — faces the 15% surcharge on its trading income and the 20% surcharge on any separate investment income (bank interest, dividends received, and rental income) it happens to hold. A single service company can be exposed to both charges in the same accounting period.
The €2,000 Exemption and Marginal Relief
Not every euro of undistributed income is automatically hit with the full surcharge. There is a small close company surcharge exemption, followed by a marginal relief taper, before the full rate kicks in.
- No surcharge applies at all where the excess of distributable income over distributions made is €2,000 or less.
- Marginal relief applies just above that threshold: the surcharge is capped at 80% of the excess over €2,000, rather than being charged on the full amount.
- Marginal relief tapers out once the excess passes roughly €2,461 — beyond that point, the full 20% (or 15%) rate applies to the entire excess, with no further relief.
Worked example: A close company has an excess of €2,200 (distributable income over distributions actually made). Applying the surcharge rate directly, 20% of €2,200 would be €440. But because the excess falls within the marginal relief band, the charge is instead capped at 80% of (€2,200 − €2,000) = 80% of €200 = €160 payable, rather than €440.
This relief matters most for small companies with modest undistributed balances, but for any company with a meaningful surplus above roughly €2,461, it has no practical effect, and the full rate applies from the first euro of the excess.
Worked Calculation Examples
Numbers make this far easier to understand than the underlying legislation does. Here are four realistic scenarios covering the two surcharge types, the effect of a distribution, and the intercompany election.
Example 1 — Investment/Rental Income (Section 440)
A close company earns €45,000 in net rental income during the accounting period and pays no dividend within the following 18 months. Because the company is not primarily a trading company, the 7.5% trading deduction doesn’t apply.
- Surchargeable income: €45,000
- Surcharge: 20% × €45,000 = €9,000
Example 2 — Same Company, With a Partial Dividend Paid
The same company instead pays a €30,000 dividend to its shareholders within 18 months of the accounting period end.
- Undistributed excess: €45,000 − €30,000 = €15,000
- Surcharge: 20% × €15,000 = €3,000
That’s a €6,000 saving, purely from timing a dividend correctly within the 18-month window, a simple mitigation step that’s frequently overlooked.
Example 3 — Professional Service Company (Section 441)
A close consultancy company has €80,000 of undistributed trading income for the period and no separate investment income.
- Surchargeable amount: 50% × €80,000 = €40,000
- Surcharge: 15% × €40,000 = €6,000
Example 4 — Group Election Between Close Companies
A trading subsidiary, itself a close company, pays a dividend of €20,000 to its close-company parent. In the parent’s hands, this would ordinarily be treated as undistributed investment income and become surchargeable. Instead, both companies jointly elect to disregard the distribution for surcharge purposes.
The Effect: The parent is not surcharged on the €20,000, but, in exchange, it also can’t treat the €20,000 as a distribution that would reduce its own undistributed income for surcharge purposes elsewhere. It’s a neutral mechanism rather than a way to eliminate liability, but it prevents double taxation of the same income moving between related close companies.
The 18-Month Window and the Delayed CT1 Billing Trap
This is the point that catches the most SME directors off guard, largely because it’s rarely explained clearly anywhere else: the surcharge for one accounting period isn’t collected with that period’s own CT1; it is added to the corporation tax liability of the following accounting period. In other words, the close company surcharge in Ireland you owe on 2024’s undistributed income doesn’t appear on your 2024 CT1 at all. It quietly shows up a year later, folded into a completely different period’s tax bill.
- Example: A surcharge relating to the accounting period ending 31 December 2024 carries an 18-month distribution deadline of 30 June 2026. If no qualifying dividend is paid by that date, the surcharge is not retroactively added to the 2024 CT1; instead, it becomes part of the corporation tax liability for the accounting period ending 31 December 2025 and is paid alongside that later period’s own CT.
- The surprise factor: Because of this lag, a company can be caught off guard by a surcharge appearing on a CT1 filing more than a year after the income in question actually arose. A director reviewing the 2025 CT1 may see a materially higher-than-expected bill with no obvious connection to 2025’s own trading performance, simply because it’s carrying an extra charge relating to profits earned back in 2024.
- Practical takeaway: Don’t assume next year’s CT1 will simply reflect next year’s trading results. Track the 18-month distribution deadline for each accounting period actively, ideally as a standing item at year-end review, so the decision to pay (or not pay) a qualifying dividend is made deliberately, well before the deadline passes, rather than the surcharge being discovered as a surprise line item on a much later filing.
- Cross-reference: See our companion guide on the CT1 filing deadline for the full dual-deadline timeline, covering how the CT1 filing date and the 18-month distribution window interact across consecutive accounting periods.
How to Avoid or Reduce the Surcharge
To avoid the close company surcharge in Ireland, you must distribute sufficient investment or service income as dividends or choose approved corporate investment structures within 18 months of the accounting period end. Here are some legitimate and standard ways to reduce the close company surcharge.
- Pay a qualifying dividend within 18 months of the end of the accounting period in which the income arose. This is the single most direct way to reduce or eliminate the charge, as shown in Example 2 above.
- Apply the 7.5% trading deduction where the company genuinely exists mainly to carry on a trade; many service companies overlook this because they assume it only applies to obviously “trading” businesses like manufacturing or retail.
- Consider the joint election available between two close companies for intercompany distributions, to avoid the same income being effectively taxed twice as it moves through a group structure.
- Check the €2,000 close company surcharge exemption and marginal relief before assuming the full charge applies, particularly relevant for smaller companies or those in their first year or two of trading. Newly incorporated companies may also need to consider Section 486C Start-Up Relief where the eligibility conditions are met.
- Under the Irish Companies Act 2014, an Irish company is legally prohibited from making a distribution unless it has sufficient distributable reserves. If there’s genuinely nothing available to distribute, for example, because of accumulated losses, the surcharge cannot be enforced against income that can’t legally be paid out in the first place.
Common Mistakes SMEs Make
- Assuming the close company surcharge in Ireland only affects rental or investment holding companies, not trading or consultancy companies.
This is one of the most common misconceptions. Consultancies, agencies, and professional practices are directly exposed via the 15% service company surcharge on their trading income and can also face the 20% charge on any separate investment income they hold — so “we are a trading business” is not, on its own, a reason to assume the rules don’t apply.
- Missing the 18-month deadline because it doesn’t align neatly with the CT1 filing date.
The two deadlines run on separate clocks, and there’s no automatic reminder from Revenue when the distribution window is approaching. Without a deliberate process for tracking it, the deadline can pass unnoticed.
- Not realising the surcharge lands on the following period’s CT liability, and being caught out by an unexpectedly high CT1 bill.
Because the charge doesn’t appear on the CT1 for the year the income actually arose, directors can be genuinely surprised a year or more later, with little obvious connection between the higher bill and its actual cause.
- Overlooking the 7.5% trading deduction where it genuinely applies.
Some directors assume the deduction is reserved for obviously “traditional” trading businesses like manufacturing or retail and don’t realise a genuinely trading service company can also qualify, leaving money on the table unnecessarily.
- Not tracking Irish dividend income as surchargeable, even though it’s exempt from ordinary corporation tax.
Because this income doesn’t attract Corporation Tax in the usual way, it’s easy to assume it sits outside the surcharge rules entirely. It doesn’t; if left undistributed beyond the 18-month window, it’s still treated as surchargeable investment income.
Conclusion
The close company surcharge in Ireland can create an unexpected corporation tax liability for Irish SMEs that retain certain investment, rental or professional income rather than distributing it. The key is to understand which surcharge applies, monitor the €2000 exemption and marginal relief and track the separate 18-month distribution window for every accounting period. Paying a qualifying dividend on time, applying the 7.5% trading deduction (where possible) and considering relevant group elections can help in avoiding or reducing the close company surcharge. Directors should review potential surcharge exposure before the deadline rather than waiting for it to appear on a later CT1. As proper planning can prevent an avoidable tax cost and improve cash flow visibility.
FAQs
What is a close company in Ireland?
A close company in Ireland is an Irish resident company controlled by five or fewer participants and their associates or by participants who are all directors.
What is the close company surcharge rate?
The close company surcharge in Ireland is 20% on undistributed income like rental or estate income and a 15% surcharge on undistributed income from trading or income for qualifying services.
How can I avoid the close company surcharge?
To avoid the close company surcharge, pay qualifying dividends within the distribution window of 18 months, apply the 7.5% deduction on trading where possible and consider relevant intercompany elections.
Is there a minimum amount before the surcharge applies?
Yes, there is a minimum amount before the surcharge applies. No surcharge applies where the excess of distributable income is €2,000 or less. Marginal relief applies above €2,000 until roughly €2,461.
When is the surcharge actually paid?
The surcharge is added to the corporation tax liability of the following accounting period instead of the accounting period in which the income generally arose.
Does the surcharge apply to Irish dividend income received by the company?
Yes, the surcharge applies to the Irish dividend income received by the company if it remains undisputed beyond the applicable 18-month period.
Can a company avoid the surcharge if it has no cash to pay a dividend?
If a company genuinely has insufficient distributable income, in such a scenario the Irish Companies Act 2014 states that the surcharge cannot be imposed against the income that cannot legally be distributed.
