Self Assessment Returns Ireland | Book Smart Accountancy

Book Smart Accountancy & Tax Advisors Ltd

Self Assessment Returns

If you are self-employed, a company director, a landlord, or earn income that is not fully taxed at source, you are required to file a self assessment tax return with Revenue each year. The process can be time-consuming and complex, but with Book Smart Accountancy managing it on your behalf, you can be confident that your return is accurate, complete, and submitted on time.

Self assessment in Ireland operates on a pay and file system. This means that you are responsible for calculating and paying your own tax liability rather than having it deducted automatically by an employer. This includes income tax, Pay Related Social Insurance (PRSI), and the Universal Social Charge (USC).

We prepare your annual income tax return based on all sources of income, including self-employment income, rental income, dividend income, foreign income, and any other taxable receipts. We also ensure that all allowable deductions and reliefs are claimed, from business expenses to pension contributions to capital allowances, so that your tax bill is as low as it should be.

Beyond the mechanics of filing, we work with you throughout the year to plan your tax position and avoid any surprises at year-end. This includes advising on preliminary tax payments, the timing of income and expenditure, and any changes in your personal or financial circumstances that may affect your liability.

With Book Smart Accountancy, your self assessment is handled by people who understand your situation and are committed to making sure you never pay more tax than you need to.

Book Smart Accountancy & Tax Advisors Ltd

Things to Know or Watch Out For with Self Assessment Returns

The Pay and File Deadline Is 31 October - Both your tax return and any balance of tax due must be submitted and paid by 31 October each year (or mid-November if filing and paying through ROS). Missing this deadline results in surcharges and interest.
Preliminary Tax Must Be Paid by 31 October of the Current Year - As well as settling the prior year balance, you must also pay preliminary tax for the current year by the same deadline. Preliminary tax must be at least 90% of your final liability for the year, 100% of the prior year liability, or 105% of the pre-preceding year liability (if paying by direct debit).
All Sources of Income Must Be Declared - Revenue requires you to declare all income, including rental income, freelance earnings, foreign income, and investment returns. Omitting income, even unintentionally, can lead to penalties and interest.
PRSI Class S Applies to the Self-Employed - Self-employed individuals pay PRSI at Class S, which is 4% on gross income with a minimum annual payment. PRSI contributions affect your entitlement to certain social welfare benefits, including the State Pension.

Business Expenses Must Be Wholly and Exclusively for Business - Only expenses that are incurred wholly and exclusively for the purposes of your trade or profession can be deducted from your income. Mixed-use expenses, such as a home office or a car used for both business and personal purposes, must be apportioned correctly.
Rental Income Has Specific Rules - Rental income is taxed separately from trading income. Allowable deductions include mortgage interest (subject to restrictions), repairs and maintenance, management fees, and certain other costs. Improvements and capital works are generally not deductible.
Pension Contributions Can Reduce Your Tax Bill - Contributions to an approved pension plan are deductible for income tax purposes, subject to age-related limits. Making pension contributions before the filing deadline can reduce your current year liability.
Revenue's MyEnquiries and PAYE Modernisation Increase Transparency - Revenue has access to a wide range of data through employer reporting, financial institutions, and other sources. Ensuring your return is accurate and consistent with information Revenue holds is more important than ever.

Book Smart Accountancy & Tax Advisors Ltd

Frequently Asked Questions

You are required to file a self assessment return if you are self-employed, a proprietary director, a landlord, or if you have income that is not fully taxed through the PAYE system. If you are unsure whether you need to file, we can advise you based on your specific circumstances.

The annual deadline is 31 October. If you file and pay online through Revenue's ROS system, the extended deadline is typically in mid-November. We manage all deadlines on behalf of our clients and submit returns well in advance.

You can claim any expense that is incurred wholly and exclusively for the purposes of your business. This includes accountancy and professional fees, rent and utilities for business premises, motor expenses for business travel, equipment and stationery, insurance, advertising, and staff costs. Where an expense has both a business and personal element, only the business proportion is deductible. We review your expenditure carefully to ensure every legitimate claim is made.

Preliminary tax is an advance payment of your estimated tax liability for the current year, paid at the same time as you settle the prior year balance. To avoid interest, your preliminary tax payment must be at least 90% of your final liability for the year, 100% of your prior year liability, or 105% of your liability from two years ago if paying by direct debit. We calculate the optimal amount for each client to avoid overpaying while staying clear of interest charges.

Yes. Contributions to a Revenue-approved pension plan are deductible for income tax purposes. The maximum relief available depends on your age, ranging from 15% of net relevant earnings for those under 30 to 40% for those aged 60 and over. Pension contributions can be a very effective way of reducing your tax bill while also planning for retirement. We advise on the most efficient level of contribution for your situation.

If your return is filed late, a surcharge applies to your tax liability. The surcharge is 5% of the tax due, up to a maximum of EUR 12,695, if the return is filed within two months of the deadline. If filed later than two months after the deadline, the surcharge rises to 10%, up to a maximum of EUR 63,485. Interest also accrues on any unpaid tax from the due date. We contact all clients well in advance of deadlines to ensure this situation never arises.

If you are tax resident and domiciled in Ireland, you are liable to Irish income tax on your worldwide income, including income earned abroad. Even if tax has been deducted in another country, you may still have an obligation to declare that income in Ireland, although relief may be available under a double taxation agreement. If you have foreign income, we will advise on the correct treatment and ensure you are not taxed twice on the same income.

Yes. We regularly assist clients who have fallen behind on their tax filings. We can prepare returns for multiple years, calculate the tax, interest, and surcharges due, and engage with Revenue on your behalf to bring your affairs up to date. In some cases, making a voluntary disclosure before Revenue makes contact can reduce the penalties payable. The sooner you address outstanding returns, the better the outcome is likely to be.