Navigating Cross-Border Remote Work: Tax Implications For Employers In Ireland And Northern Ireland

If you have employees working from home in the Republic of Ireland for a Northern Ireland business, or staff based in Northern Ireland doing work for an Irish employer, you may already have a tax and payroll position that needs closer attention.

Remote working did not create cross-border employment complexity, but it has made it much harder to manage. The key point is this: income tax usually follows where employment duties are physically performed, while social security follows separate UK-Ireland coordination rules. A Northern Ireland company whose Irish-resident employee works 2 days a week from home in Donegal may now be operating across 2 payroll systems, even if the employment arrangement was originally set up as a simple NI-based role.

This article is for employers in Northern Ireland and the Republic of Ireland with staff whose working patterns cross the border in either direction. It covers payroll, PAYE, PRSI, NIC, Transborder Workers Relief, permanent establishment risk, employment law issues and the records you need to keep.

Why This Has Become More Urgent Since The Pandemic

Cross-border employment has existed along the NI and ROI border for generations. What changed after the pandemic is the structure of work.

Employees who previously commuted to Belfast 5 days a week from Dundalk may now work partly from home. Staff employed by Dublin firms may work part of the week from Newry. Hybrid working is now normal, but many tax and payroll arrangements were created before that pattern existed.

That creates risk. HMRC and Revenue both expect payroll and tax treatment to follow the actual working pattern, not the old contract or the pre-pandemic routine. If an employee’s duties are now split between 2 jurisdictions, the employer needs records to support that position.

Our piece on cross-border payroll covers the broader payroll friction points, and our piece on setting up a company in both the UK and Ireland covers the structural questions that often sit upstream.

The Four Scenarios That Cover Most Cross-Border Arrangements

Most arrangements fall into one of the following patterns.

The word “mostly” is important. Where the pattern is genuinely mixed, both tax systems may be involved. That does not always mean double tax is ultimately paid, because the UK-Ireland Double Taxation Agreement can provide relief, but it does mean both payroll positions must be analysed properly.

Our Cross-border tax accounting team handles this type of dual-system analysis, and our piece on common tax mistakes expats and cross-border businesses make covers the errors that arise when the detail is missed.

Transborder Workers Relief: The Relief That Hybrid Working Can Break

For Irish-resident employees who commute to work in Northern Ireland, Transborder Workers Relief can be valuable. It can reduce Irish income tax on qualifying foreign employment income where the employee works and pays tax in a country with which Ireland has a Double Taxation Agreement.

To qualify, the employee must generally:

• Be tax resident in Ireland
• Work in a country that has a Double Taxation Agreement with Ireland
• Hold the qualifying employment for a continuous period of at least 13 weeks in the year
• Pay tax in the other country, with that tax not refundable
• Be present in Ireland for at least 1 day in each week during which they work abroad
• Exercise the duties of the qualifying employment wholly outside Ireland, apart from duties that are merely incidental

That final condition is where hybrid working causes problems.

If an Irish-resident employee performs substantive duties from home in the Republic of Ireland, those are not duties exercised wholly outside Ireland. Regular home working in Ireland can therefore prevent the relief from applying. Revenue’s COVID-19 concession for home working has ended, so it should not be relied on for current arrangements.

Where the relief does not apply, the employee may need to rely on normal double tax relief instead. That usually means identifying which duties were performed in each jurisdiction, filing correctly and claiming credit where available.

Our article on UK tax rules for individuals with income in multiple countries covers the personal filing side in more detail.

PAYE Obligations For Employers

Most employer errors come from treating a cross-border role as if it belongs to only 1 payroll system.

Northern Ireland Employer With An Irish-Resident Employee

A Northern Ireland employer will usually operate UK PAYE and Class 1 NIC in the normal way for a UK-based employment. However, if the employee performs duties from home in the Republic of Ireland, the employer may also need to operate Irish PAYE, USC and PRSI on the Irish workday portion, subject to the detailed rules and any Revenue direction or exemption.

The practical options may include:

• Registering directly with Revenue as a foreign employer
• Appointing an Irish payroll agent
• Reviewing whether an Employer of Record structure is appropriate
• Adjusting the employment contract and work pattern to match the payroll treatment

An Employer of Record can simplify payroll administration, but it creates wider employment law and commercial questions. It should not be adopted without legal and tax advice.

Irish Employer With A Northern Ireland-Resident Employee

An Irish employer will usually operate Irish PAYE, PRSI and USC. If the employee performs duties from home in Northern Ireland, the employer may also need to consider UK PAYE and NIC obligations for those UK duties.

That can mean registering as a UK employer with HMRC and operating Real Time Information reporting for the UK element.

Neither Revenue nor HMRC treats these registrations as optional where real duties are being performed in their jurisdiction.

Our pieces on Making Tax Digital explained and Making Tax Digital and what UK and Irish businesses need to know cover the digital filing context on the UK side. Our updates on HMRC PAYE issues and salary sacrifice pension changes are also relevant where payroll structures are being reviewed.

Social Security: Do Not Treat PRSI And NIC Like Income Tax

Social security does not work in the same way as income tax. The UK-Ireland Convention on Social Security generally aims to ensure that a worker is subject to the social security legislation of only 1 country at a time.

The starting point is that a person working in 1 country is subject to that country’s social security system. Where a person normally works in both the UK and Ireland, the Convention uses coordination rules. If the person performs a substantial part of their work in the country where they live, that country’s system may apply. If not, the employer’s location and other factors become important.

This means you should not simply split PRSI and NIC in the same way as income tax. The correct contribution country must be determined separately.

For employers, the practical risk is getting the wrong system or failing to obtain the right certificate or confirmation. For employees, the risk is confusion over contribution records, state pension entitlement and benefit protection.

Our piece on how to prepare your business for sale touches on why hidden employment liabilities surface in due diligence, and our piece on due diligence and its importance in business explains where this scrutiny usually falls.

Permanent Establishment Risk

Payroll is not the only issue. A Northern Ireland company with an employee working from home in the Republic of Ireland may also need to consider whether the arrangement creates a permanent establishment in Ireland.

A permanent establishment can arise where a company has a fixed place of business in another country through which its business is carried on, or where a person habitually concludes contracts on its behalf.

The main questions are:

• Does the employee have authority to conclude contracts?
• Do they habitually use that authority?
• Are they carrying out core business activities rather than merely supporting or administrative tasks?
• Has their home office effectively become a place of business for the company?
• Is the arrangement occasional, temporary or regular and permanent?

A sales director working from Cork for a Belfast company, negotiating and concluding contracts with Irish clients, presents a higher risk than a back-office administrator occasionally working from home in Monaghan.

If a permanent establishment exists, profits attributable to that Irish activity may fall within Irish corporation tax. It is better to assess that risk before Revenue raises it.

Our piece on tax planning for UK businesses expanding overseas covers the wider international structuring considerations. Our article on R&D tax credits in the UK and Ireland is relevant where ROI-based activity involves qualifying R&D work. The Irish R&D tax credit is now 35% for qualifying expenditure, with the first-year payable credit threshold increased to €87,500.

Minimum Wage Rules In Both Jurisdictions

Where work is performed across both jurisdictions, minimum wage rules need to be checked carefully.

From 1 January 2026, the Irish National Minimum Wage is €14.15 per hour for most adult employees. From 1 April 2026, the UK National Living Wage for workers aged 21 and over is £12.71 per hour.

If an employee works part of the week in Northern Ireland and part of the week in the Republic, the employer should ensure that pay meets the relevant minimum wage rules for the work performed in each place. This matters most where employees are close to the minimum wage floor, work variable hours, receive deductions, or have salary sacrifice arrangements.

Our piece on how management accounts help SME owners covers the financial visibility needed to monitor this type of cost exposure.

Documentation: What HMRC And Revenue Expect

The burden of proof rests with the taxpayer. If you claim that income should be apportioned between 2 jurisdictions, or that a relief applies, you need records.

For each cross-border employee, keep:

• A daily or weekly work location log
• Calendar records and diary entries
• Access card data where available
• Meeting records showing physical location
• Travel and expense records
• Written hybrid-working agreements
• Payroll calculations showing the apportionment method
• Evidence of foreign tax paid where double tax relief is claimed
• Any certificates or confirmations relating to social security coverage

These records should be kept in real time. Reconstructing them months later during a Revenue or HMRC enquiry is much harder.

Our piece on switching to cloud accounting for SMEs covers the systems that make ongoing record capture practical.

A Practical Employer Checklist

If you have cross-border employees, review the following for each person:

• Map the actual work pattern, not just the contractual one
• Identify where duties are physically performed
• Check whether PAYE needs to operate in both jurisdictions
• Confirm whether UK NIC or Irish PRSI applies under the coordination rules
• Review Transborder Workers Relief for Irish-resident employees working in NI
• Check whether ROI home working creates permanent establishment risk
• Confirm payroll registrations are in place
• Review employment contracts and governing law clauses
• Check minimum wage compliance in both jurisdictions
• Keep live records of work location and tax treatment

For many employers, this review will reveal at least 1 gap between the old arrangement and the current working pattern. The earlier that gap is identified, the easier it is to correct.

Our piece on why internal audit supports business growth explains the governance discipline that makes these reviews routine rather than reactive.

When Cross-Border Employment Disputes Escalate

Most cross-border payroll issues are administrative and fixable. Some become formal Revenue or HMRC enquiries, employment disputes, tribunal proceedings or commercial disagreements over what was agreed and what actually happened.

Where a cross-border employment position needs to be reconstructed, the evidence standard is high. Our chartered forensic accountant team can rebuild employment and payroll positions from primary records across both jurisdictions.

Our pieces on what a forensic accountant does and when you need one, forensic accounting in shareholder and partnership disputes and forensic accounting vs audit explain where that analysis sits.

Where cashflow pressure is also part of the picture, our recovery accounts UK team works alongside the tax and forensic teams. Our pieces on how recovery accountants help improve cash flow and what an insolvency accountant does in business distress cases cover that broader territory.

The Wider 2026 Backdrop

When reviewing cross-border employment arrangements, employers should also factor in the following 2026 changes:

• Irish National Minimum Wage rose to €14.15 per hour from 1 January 2026
• UK National Living Wage rose to £12.71 per hour from 1 April 2026 for workers aged 21 and over
• UK Statutory Sick Pay changed from 6 April 2026, with day-one entitlement, removal of the lower earnings limit and payment at the lower of the statutory weekly rate or 80% of average weekly earnings
• Irish statutory sick leave remains 5 days per year, paid at 70% of normal pay and capped at €110 per day
• UK dividend tax ordinary and upper rates rose by 2 percentage points from 6 April 2026, while the additional rate remained unchanged
• Ireland’s 15% effective minimum corporation tax applies to in-scope large groups with consolidated revenues of €750 million or more, while the 12.5% trading rate remains relevant for many businesses outside that regime
• PAYE Modernisation in Ireland continues to require real-time payroll reporting on or before payment to employees
• Making Tax Digital for Income Tax applies from 6 April 2026 to sole traders and landlords with qualifying income over £50,000, then to those over £30,000 from April 2027 and over £20,000 from April 2028
• Great Britain introduced day-one rights to paternity leave and unpaid parental leave from 6 April 2026, while Northern Ireland has its own employment law framework and the Good Jobs Bill has not yet been enacted
• ROI employment law has its own separate framework and should be checked independently

Our articles on Making Tax Digital explained and Making Tax Digital for cross-border businesses are directly relevant.

For wider business planning, our pieces on the key financial KPIs every SME owner should be monitoring monthly, the future of financial planning and protecting the family business with a family charter are worth reading.

For businesses approaching transactions, the indispensable role of chartered accountants in mergers and acquisitions, how to prepare your business for sale and what to expect during an external audit explain where employment compliance sits in due diligence.

For directors and cross-border individuals, the self-assessment tax returns guide is the relevant starting point. Our articles on how to report foreign dividends and interest in the UK and managing overseas property cover related personal tax areas.

FAQs

Does A Northern Ireland Employer Need To Register For Irish PAYE If An Employee Works From Home In The Republic?

Potentially, yes. If an employee performs employment duties in the Republic of Ireland, Irish PAYE, USC and PRSI may need to be considered for the Irish workday portion. The answer depends on the facts, the working pattern, any Revenue direction and the wider payroll structure.

What Is Transborder Workers Relief And Does Remote Working Affect It?

Transborder Workers Relief can reduce Irish income tax for Irish-resident employees who work and pay tax in another country, including Northern Ireland. Regular substantive duties performed from home in Ireland can prevent the relief from applying because the duties are no longer exercised wholly outside Ireland.

What Happens To Social Security For A Cross-Border Remote Worker?

Social security is governed separately from income tax. The UK-Ireland Convention generally assigns the worker to one social security system at a time. The correct system depends on where the worker lives, where they perform a substantial part of their work, where the employer is based and the exact working pattern.

Can A Remote Worker In The Republic Create A Permanent Establishment For A Northern Ireland Company?

Yes, in some cases. The risk is higher where the employee has authority to conclude contracts, performs core business functions, or where the home office effectively becomes a fixed place of business for the company. Support or administrative work usually carries lower risk, but each case needs to be assessed.

What Documentation Do HMRC And Revenue Expect?

They expect contemporaneous records: work location logs, calendars, access records, travel claims, payroll calculations, written agreements and evidence of tax paid. The records should show where duties were actually performed, not just what the contract says.

What Is The Employer Of Record Option And When Is It Used?

An Employer of Record is a third-party company that becomes the legal employer in the employee’s jurisdiction and handles local payroll, tax and employment administration. It can simplify compliance, but it changes the legal and employment structure and should be reviewed carefully before use.

Does Irish Employment Law Or UK Employment Law Apply To A Cross-Border Employee?

It depends on where the employee habitually works, the employer’s location, the contract, and the actual working pattern. In some hybrid arrangements, both jurisdictions may be relevant. Employment law advice should be taken alongside tax and payroll advice.

Get The Right Support In Place

Cross-border remote working is one of the more technical areas of employment tax because it requires 2 systems to be understood together. Getting the structure right early is much cheaper than correcting it during a Revenue or HMRC enquiry.

As accountants Ireland and Northern Ireland businesses rely on for cross-border employment, payroll and tax work, SCC Chartered Accountants works across both regimes daily. Our Cross-border tax accounting team leads the employment tax analysis, our digital bookkeeping team supports payroll systems on both sides, our tax compliance and specialist tax teams cover the associated filing obligations, and our SME business solutions team keeps the wider operational picture in view.

Get in touch with the SCC team for a cross-border employment tax review tailored to your current working arrangements.