Close Company Surcharge is an Irish tax charge on certain undistributed income of close companies, especially investment and service income.

Close Company Surcharge is an Irish corporation tax charge that can apply where a close company does not distribute certain income within the required period. A close company is broadly a company controlled by five or fewer participators, or by participators who are directors. Many founder-owned Irish companies are close companies, especially in the early years before external investment broadens the shareholder base.
The surcharge is designed to discourage closely held companies from accumulating certain types of income inside the company rather than distributing it to shareholders, where it may then be taxed personally. It is most relevant to investment income and certain professional or service company income. Trading companies can still be affected if they earn passive income or fall within the service company rules.
For founders, the key point is that the surcharge is not just a tax technicality for mature private companies. It can affect startups, consultancies, holding companies, and owner-managed businesses if profits are retained without considering the close company rules. It should be reviewed as part of annual tax compliance and profit extraction planning.
The surcharge applies to certain undistributed income of a close company. The rules distinguish between different categories of income, with investment income and estate income often treated differently from active trading profits. For some service companies, part of the undistributed income from professional services may also be within scope.
A company can generally avoid or reduce the surcharge by making qualifying distributions within the required timeframe. This usually means paying dividends to shareholders, subject to company law, available distributable reserves, cash flow, and tax considerations. The decision is not always straightforward because the company may need to retain cash for growth, tax payments, hiring, or working capital.
The surcharge is calculated through the corporation tax return process and depends on the company's income profile, distributions, and close company status. The detail can be technical, so accountants typically review it when preparing the CT1 return. Founders should still understand the issue because it affects decisions about retaining profits versus distributing them.
Many Irish startups and small companies are close companies by default because a small number of founders or directors control the shares. That status does not mean the company has done anything wrong. It simply means specific anti-avoidance rules may apply.
The surcharge matters because it can turn a passive decision into a tax cost. A founder may assume that leaving profits in the company is always sensible because it supports growth. That may be true for trading profits needed in the business, but the position can differ for investment income, rental income, deposit interest, or certain service company profits.
It also matters for holding companies and group structures. A company that receives dividends, interest, royalties, or other passive returns may need careful review. If the company is not actively trading, or if profits are accumulating without a commercial reason, the surcharge analysis becomes more important.
The first planning question is whether the company is a close company. If control is concentrated among founders, directors, family members, or connected persons, the answer is often yes. Changes to shareholding, investment rounds, and group ownership can affect the analysis, so it should be revisited periodically.
The second question is what type of income the company has earned. Ordinary trading income, investment income, rental income, professional service income, and capital gains are not always treated the same way. Accurate accounting categories matter because the surcharge follows the income type.
The third question is whether a distribution is commercially and legally appropriate. Dividends can only be paid out of distributable profits and must comply with company law. A company should not pay dividends merely to reduce surcharge if doing so would weaken cash flow or breach obligations. The board should document the reasoning either way.
Ask about close company status early. If your company is founder-controlled, assume the rules may be relevant until your accountant confirms otherwise. Do not wait until the corporation tax return deadline to discuss retained profits.
Separate trading and passive income clearly in the accounts. Interest, rental income, royalties, and investment returns should be identifiable. Good categorisation helps your accountant calculate the surcharge correctly and identify planning options.
Finally, coordinate tax planning with cash planning. Paying dividends can reduce one tax issue while creating another cash constraint or personal tax charge. The right decision depends on the company's growth plan, shareholder needs, distributable reserves, and future funding requirements.