Live in the Republic, work in the North? You may owe no Irish tax on it

If you live in the Republic and cross the border for work — a job in Derry, Belfast, or anywhere in the UK — there's a Revenue relief that can be worth thousands a year, and plenty of cross-border workers either don't know about it or have quietly lost it. It's called Trans-Border Workers Relief, and it can wipe out the Irish income tax on your foreign job so you only pay the tax where you actually work. But there's one modern trap that catches people out — and it's the day you work from home.

Who qualifies for Trans-Border Workers Relief?

You qualify if you're tax-resident in Ireland, you hold a job exercised wholly in a country Ireland has a double-taxation treaty with (Northern Ireland and the rest of the UK count), you commute daily or weekly to that job, you hold the employment for a continuous period of at least 13 weeks, and you've paid the foreign tax due on the income.

In plain terms: you live in the Republic, you travel across the border (or the water) to work, that country taxes your wages, and you come home regularly. That's the classic cross-border worker the relief was designed for.

How much is it worth?

It effectively removes the Irish income tax on your qualifying foreign employment income — you generally pay tax only in the country where you work, not additional Irish tax on top. USC also doesn't apply to Northern Ireland employment income that qualifies. On a full-time cross-border salary, that can be worth thousands of euro a year.

Without the relief, Ireland would tax your worldwide income and then give credit for the foreign tax you paid — which often still leaves an Irish top-up bill because Irish rates can be higher. The relief removes that top-up on the qualifying employment income.

Does working from home in Ireland affect the relief?

Yes — and this is the biggest trap. The relief requires the employment to be exercised wholly outside the Republic. If you carry out any of your duties from home in Ireland — even occasional hybrid days — you can lose the relief for that period. Huge numbers of cross-border workers were caught out when remote working became normal after 2020.

How do you claim it?

Claim it by filing an Irish income tax return (Form 11 or Form 12) for the year through Revenue's myAccount or ROS, declaring your foreign employment income and the foreign tax paid, and claiming Trans-Border Workers Relief. Keep evidence of your commute, your contract, and the foreign tax paid. For complex or hybrid situations, a cross-border tax specialist is worth the fee.

Common questions

This guide is general information, not tax advice. Cross-border tax is complex and individual circumstances vary — always confirm your position with Revenue or a qualified cross-border tax adviser before you act.

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