Self-Assessment and Filing Obligations
Written in plain language for general understanding. This is educational content, not legal advice. Based on Irish Acts of the Oireachtas, statutory instruments, and official guidance.
Irish National Law
What is this right?
If you are self-employed, a director, or have non-PAYE income above certain thresholds, you must file an annual tax return under the self-assessment system.
- The annual return (Form 11) must be filed by 31 October (or mid-November if filing and paying through ROS — Revenue Online Service).
- You must calculate your own tax liability and pay it with the return — this is why it's called "self-assessment."
- Preliminary tax must also be paid by the filing deadline — this is an estimate of the current year's liability (at least 90% of the final liability, or 100% of the previous year's liability).
- If you file late, surcharges apply: 5% up to 2 months late (max €12,695), 10% after 2 months (max €63,485).
When does it apply?
- You are self-employed (sole trader, freelancer, contractor).
- You are a proprietary director of a company (holding 15%+ of shares).
- You are a PAYE employee with non-PAYE income over €5,000.
- You have capital gains, rental income, foreign income, or certain other income types.
- Revenue issues you a notice to file — you must comply even if you have no tax liability.
What should you do?
- Register for ROS (Revenue Online Service) — filing and paying online gives you an extended deadline (usually mid-November).
- Keep proper records — receipts, invoices, bank statements, and expense records for at least 6 years.
- Claim all allowable deductions — business expenses, capital allowances, pension contributions, and relevant credits.
- If you are just starting out, consider engaging an accountant — the cost is itself a tax-deductible expense.
- The self-employed get an Earned Income Tax Credit of €1,875 (same as the Employee Tax Credit).
What should you NOT do?
- Don't miss the filing deadline — late surcharges are automatic and cannot be waived.
- Don't forget preliminary tax — underpayment triggers interest charges.
- Don't mix personal and business finances — keep a separate business bank account for cleaner records.
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