Moving to Ireland from abroad marks the start of your next chapter – new job, new home, new friends, the list goes on. But one thing that can quickly put a damper on your fresh start is misunderstanding Irish tax obligations and paying more tax than you need to.
Overpaying tax can take a significant chunk out of your income. But if you’re a non-dom in Ireland, this is often avoidable. When you brush up on Irish expat tax rules – and do a little planning – you can stay compliant with the rules and hang onto every bit of income you’re entitled to.
This guide explains how remittance basis of taxation for non-doms works and what you can do to avoid overpaying on your taxes.
How to Know If You’re a Non-Dom in Ireland (and Why it Matters for Your Taxes)
If you’ve recently moved to Ireland, understanding your tax status is important. A lot of expats don’t realise that you can be an Irish tax resident and still be non-domiciled – and that this can significantly reduce how much tax you owe on foreign income.
It’s a common mistake to mix up Irish tax residency or citizenship with domicile. While residency is simply a day-count of where you live, domicile is a deeper legal concept.
Being non-domiciled in Ireland isn’t about how long you’ve lived there. It depends on where your permanent home is considered to be, the ties you retain with that place and your overall long-term intention.
Because domicile rules can be confusing, many people end up paying tax like a local resident. This often means missing out on tax savings that may be available under the remittance basis.
How to Check If You’re a Non-Dom in Ireland
There isn’t a single form you fill out that officially stamps you as non-dom. Instead, your domicile is worked out based on your background and long-term plans. In Ireland the tax system is a self-assessed one – this can mean you need to engage an adviser to guide you on your domicile position.
That might sound vague, but in practice, there are a few clear signs that usually point to non-dom status:
1. You were born outside Ireland
Your domicile of origin is usually the country your father was domiciled in when you were born. For most people, this stays the same unless they take clear steps to permanently settle somewhere else.
2. You don’t see Ireland as your forever home
If you moved here for work, study, or a change of pace – but don’t see Ireland as where you’ll settle permanently – that often supports a non-dom position. On the other hand, if Ireland is the place you plan to build your long-term home and stay indefinitely, that can weaken a non-dom claim.
3. Your strongest ties are abroad
Another big factor is where your strongest personal and financial ties are. This might include things like:
- Owning property outside Ireland
- Having close family overseas who you regularly visit
- Keeping bank accounts, investments, or pensions abroad
- Planning to return to another country later in life
Retaining evidence to support the above is important if you intend to assert you are non-domiciled.
4. You haven’t cut ties with your home country
Big life decisions can affect how Revenue views your status. Applying for Irish citizenship, selling all overseas property, or clearly committing to Ireland as your permanent home can weaken a non-dom position. However no one factor is conclusive in domicile analysis – each case needs to be considered on the merit of its own facts.
What Is the Remittance Basis of Taxation?
If you’re classed as non-dom in Ireland, you may be able to use the remittance basis of taxation. This rule affects how Ireland taxes income earned outside the country, including income held in non-Irish investments
Under the remittance basis, foreign income is only taxed in Ireland if you bring it into the country. If the money stays outside Ireland, it’s usually not taxed here.
Here’s a quick breakdown of non-dom taxes:
- Income earned in Ireland – or Irish source income – is always taxed in Ireland
- Income earned outside Ireland (foreign source income) is not automatically taxed
- Tax is only charged when that income is transferred into Ireland
- Money kept abroad may fall outside the Irish tax system
This can have a real impact on how much tax you pay. Without correct application ofthe remittance basis, foreign income may be taxed in Ireland even if it was never spent or used here.
Understanding how this rule works is essential if you want to avoid paying tax you don’t owe.
Common Mistakes Non-Domiciled Individuals Make
Even when people qualify as non-dom, many still end up paying more tax than necessary.
Here are some of the most common mistakes:
Assuming Non-Dom Means No Tax at All
Being non-domiciled doesn’t mean you don’t pay tax. Any income earned in Ireland is always taxable. The non-dom rules mainly affect how your foreign income is treated.
Mixing Foreign and Irish Income
Using the same non-Irish bank account for all of your foreign money can make it hard to track what’s been brought into Ireland and what hasn’t.
This can lead to accidental tax charges. It can also cause problems if Revenue (the Irish tax authority) asks for proof of where your income came from and when it was transferred.
Bringing Money into Ireland Without Planning
Many people transfer funds without realising this can trigger Irish tax. Even small or indirect transfers can sometimes count as a remittance (and trigger Irish tax!).
A little planning can prevent accidental tax charges:
- Keep separate foreign accounts for foreign income, foreign gains and foreign savings
- Track what you transfer and when (notes and records matter)
- Avoid mixing funds unless you’ve checked the tax impact
- Use clean capital carefully (this is money earned before becoming Irish tax resident)
- Get advice before moving large sums – not after
Not Understanding Double Taxation Agreements (DTAs)
Ireland has tax DTAs with many countries, but these don’t apply automatically. If you don’t claim relief correctly (with the relevant double taxation agreement), you could end up paying tax twice on the same income.
- Tax credits: If you’ve already paid tax on income in another country, you may be able to claim a credit for that tax against your Irish tax bill. That way, you don’t pay tax twice on the same income – you only pay the difference if Ireland’s tax rate is higher.
- Exemptions: Some types of income may be taxed only in one country under the treaty. For example, certain pensions, government salaries, or employment income may be taxable in just one location, not both.
- Reduced tax rates: Treaties often lower the rate of tax charged on income like dividends, interest, or royalties. Without claiming treaty relief, this income could be taxed at a higher default rate.
- Tie-breaker rules: If two countries both say you’re a tax resident, the treaty sets out rules to decide which one gets first claim on taxing you. These rules look at things like where your main home is, where your personal life is based, and where you usually live day to day.
Not Getting Professional Tax Advice When Things Aren’t Clear
Many people rely on general online advice or guess their way through non-dom rules, even when their situation is more complicated.
This can lead to overpaying tax, missing out on reliefs, or filing incorrectly. Getting advice before making big money decisions – like triggering tax residency, moving large sums or selling assets – can often save you much more than it costs.
How Inheritance Tax Works for Non-Doms
In Ireland, inheritance tax is called Capital Acquisitions Tax (CAT). While the system is famous for being tough on beneficiaries, there’s a special exemption period for non-dom people moving to Ireland from abroad.
The 5-Year Exemption
This is an important rule for non-doms. If you’re living in Ireland, but your permanent home (domicile) is elsewhere, Ireland will not tax you on a foreign gift or inheritance if:
- You have not been a tax resident in Ireland for the last 5 consecutive years.
- The person giving the gift is not resident or ordinary resident; and
- The asset gifted is not Irish situate .
If you’ve only been here for 3 or 4 years and are non-dom, and you inherit money from a relative back home, it’s generally 100% tax-free in Ireland – even if you bring that money into the country.
Why CAT Catches Non-Doms Out
The shield only protects you from foreign assets. CAT can still be triggered in three specific ways
- The asset is in Ireland: For example, an Irish house or Irish bank account.
- The giver lives in Ireland: If the person giving you the gift or leaving the inheritance is an Irish tax resident or ordinary resident.
- You live in Ireland: If you’re an Irish tax resident for 5 years, this can be enough on its own, even if you are non-domiciled.
If any one of these applies, CAT can be triggered.
What Is the CAT Tax Rate?
CAT is charged at a flat rate of 33% in Ireland. But keep in mind, this rate only applies to the portion of an inheritance or gift that exceeds the relevant tax-free threshold.
These thresholds depend on your relationship to the person giving you the gift or inheritance. For example:
- Group A (child of the disponer): €400,000
- Group B (close relatives like siblings, nieces, nephews): €40,000
- Group C (everyone else): €20,000
Once you go over your threshold, the excess is taxed at 33%.
Irish CAT Examples for 2026
Example A: Inheriting from a Parent (Group A)
If you inherit €500,000 from a parent in 2026, the first €400,000 is entirely tax-free. You only pay the 33% tax on the remaining €100,000.
€100,000 × 33% = €33,000 tax bill.
Example B: Inheriting from a Grandparent (Group B)
If you are a grandparent leaving €100,000 to your grandchild, the 2026 tax-free threshold is €40,000. The portion above this (€60,000) will be taxed at 33%.
€60,000 × 33% = €19,800 tax bill.
Note: These thresholds are cumulative over your lifetime. If you already received a large gift from a relative in the same Group in the past, it might use up some of your current tax-free limit.
Always check the latest figures on the Revenue Commissioners website before making a final calculation.
How to Pay CAT in Ireland
If you owe CAT in Ireland, here’s a quick guide on how to pay it:
- Fill out Form IT38: If the value of your inheritance or gift exceeds the tax-free threshold, complete Form IT38 through Revenue Online Service (ROS) or by post.
- Calculate the tax: CAT is 33% above the tax-free threshold.
- Make the payment: Pay online via ROS or by cheque/bank draft to Revenue.
- Adhere to deadlines: All gifts and inheritances with a valuation date in the 12‑month period 1 September – 31 August → CAT due by the following 31 October
- Keep records: Save proof of payment and the return for future reference.
How Expat Taxes Can Help!
Our team of Irish tax professionals helps expats and non-doms understand how Irish tax rules apply to their specific situation. We work with people who earn income across borders and want to make sure they’re meeting their tax obligations, claiming any tax advantages available to them, and not paying more tax than necessary.
If you’re unsure about your status, how the remittance basis works, how DTAs apply to you, or whether your tax filings are being handled correctly, we can help you get clear answers and avoid costly mistakes.
Book a consultation with Expat Taxes today.
DISCLAIMER: The material in this article is for general information purposes only and does not constitute legal or taxation advice. Legal, financial, investment and taxation advice should be sought before acting or refraining from acting. All information and taxation rules are subject to change without notice. Expat Taxes Limited and RemitEase Limited (hereafter ‘the parties’) accept no liability for any action taken based on the information in this article or any of the articles in our blog series. The parties do not provide financial planning, investment, or mortgage advice; this article is provided only for general information. We are not authorised/licensed to provide financial advice, and this article should not be considered to constitute advice of this type in any respect.
Written by Stephanie Wickham, CTA, FCA
Known for her ability to simplify even the most complex tax matters, Stephanie has worked extensively across income tax, corporate taxes, capital gains, and inheritance taxes, with a deep understanding of cross-border tax implications and double tax treaties. Having experienced life as an expatriate herself, Stephanie understands the stress that can come with international moves — and how daunting tax compliance can feel. Her philosophy is simple: tax advice should be straightforward, clear, and tailored to each individual.
