Remote Working Abroad: The Tax Traps Every Expat Needs to Know

The expansion of remote working has created an appealing possibility: live abroad in a warmer, cheaper, or more agreeable location while continuing to work for your UK employer. For many people, this appears financially straightforward — surely you just move and continue as before? In practice, the tax implications are considerably more complex, and the popular belief that spending fewer than 183 days in a country keeps you safe is, in many circumstances, wrong.

The 183-Day Rule Misunderstanding

The 183-day rule is the most widely misunderstood concept in expat tax. It does exist — but it applies in a specific and limited context.

Under most UK double tax treaties (DTAs), an employee is taxed only in their country of residence (not in the country where their employer is based) if three conditions are all met:

1. The employee spends fewer than 183 days in the source country in the relevant period
2. The remuneration is not paid by, or on behalf of, an employer who is resident in the source country
3. The remuneration is not borne by a permanent establishment that the employer has in the source country

This provision addresses the situation of an employee visiting another country temporarily. It does not address the situation of a UK resident working from a foreign country for a UK employer.

If you are a UK tax resident working remotely from Spain for a UK employer, your income is UK-source income from a UK employment. It remains subject to UK income tax regardless of how many days you spend in Spain. The 183-day rule does not shelter this income from UK tax.

Conversely, if you become Spanish tax resident (which occurs after 183 days in Spain in a calendar year, or if Spain becomes your centre of vital interests earlier), Spain may also tax your worldwide income — creating a potential double-taxation situation that requires treaty relief to resolve.

PAYE and National Insurance While Working Abroad for a UK Employer

PAYE: Your UK employer continues to operate PAYE on your salary while you are working abroad if you remain employed by the UK entity and are considered UK tax resident. Even if you are non-UK resident, PAYE may still apply to UK-source income — though you may be able to claim treaty relief to reduce or eliminate UK withholding (see below).

National Insurance (NIC): NIC obligations are more complex:

• For the first 52 weeks abroad, an employee working for a UK employer in most countries remains liable to pay UK NIC (both employee and employer contributions) under domestic UK rules.
• After 52 weeks, NIC liability generally ceases under domestic rules (though contributions can be made voluntarily — see the guide on social security contributions).
• If there is a bilateral social security agreement (totalisation agreement) between the UK and your host country, you may be covered by the UK system for longer or remain exclusively in one system rather than both.
• If your host country has no totalisation agreement with the UK, there is a risk of paying social security contributions in both countries simultaneously.

Corporate Permanent Establishment Risk

The most significant and most frequently overlooked risk in remote work arrangements is not your personal tax position — it is the risk to your employer.

Under international tax rules, a company creates a Permanent Establishment (PE) in a foreign country if it has a fixed place of business there, including — in some circumstances — an employee who habitually exercises authority to conclude contracts or who works from a fixed address in that country on an ongoing basis.

If a UK company's employee works from home in Germany, France, Spain, or another country for a sustained period, that company may be treated as having a PE in that country. The consequence: the host country can demand that a portion of the company's profits — attributable to the activities of the employee — be taxed in that jurisdiction. The compliance burden is significant, and penalties for unregistered PE can be severe.

Most major economies have become increasingly active in identifying and taxing PE arrangements, particularly following the OECD BEPS (Base Erosion and Profit Shifting) project. What was once a theoretical risk has become a practical one, and employers are increasingly aware that they cannot simply agree to remote working abroad without taking advice.

If you want to work remotely from abroad, raise the PE issue with your employer's tax advisers — not just HR. An employer who has not considered this point may inadvertently create a corporate tax liability in your host country.

UK Employment Contract Issues

Working abroad under a UK employment contract can create tensions with local employment law. Many countries apply mandatory employment protections to employees physically working in their territory, regardless of where their employment contract is governed. Minimum notice periods, redundancy entitlements, anti-discrimination protections, and holiday entitlements in the host country may supplement or conflict with the UK employment contract terms.

Some employers address this by putting international remote workers on a local contract (either directly or through a Professional Employer Organisation/Employer of Record), maintaining the existing UK contract but adding a side letter addressing local law requirements, or rotating assignments to avoid triggering employment law thresholds.

Tax Treaty Relief

If you are non-UK resident working remotely in a country that has a DTA with the UK, treaty relief may reduce or eliminate UK tax on some or all of your income. The specific relief depends on:

• The terms of the specific treaty (they vary significantly)
• Whether you meet the residence conditions in the treaty
• Whether your employer has a PE in the host country
• The nature of your employment (employed vs self-employed has different treaty treatment)

Treaty relief for employment income is typically claimed through UK Self Assessment. You do not receive it automatically through the PAYE system — you must file a UK tax return, claim the relief on the relevant treaty article, and potentially request an NT (no tax) PAYE code from HMRC while the treaty relief is being agreed.

The process takes time. In the interim, you may have tax deducted at source in the UK that you are entitled to reclaim — a cash flow management issue that requires planning.

Countries That Tax From Day One

Most countries apply their standard residency rules (often 183 days) before taxing foreign nationals on worldwide income. However, some jurisdictions impose tax liability from a much earlier point:

France: Day one of employment in France can create French tax obligations if the employment is French-source income. Freelancers and self-employed individuals should take particular care.

Germany: German tax law is broad in scope. Working from Germany for any employer can create German tax obligations relatively quickly.

Australia: Australia taxes employment income earned in Australia from the first day of working there, under specific rules that treat income derived from Australian-source activities as Australian income.

USA: The USA taxes on the basis of US citizenship (for US citizens and green card holders) as well as US residency. For employment income, the sourcing rules mean that any work physically performed in the US is US-source income, taxable in the US from the first day.

If you intend to work remotely from a jurisdiction for more than a few days, take specific tax advice for that country before beginning work.

Self-Employed and Contractor Considerations

Self-employed individuals and contractors working abroad face additional complexity. IR35/off-payroll rules, the Statutory Residence Test, the interaction of self-employment income with double tax treaties, and VAT registration requirements in the host country all create a web of obligations that varies by country.

For self-employed expats in the EU: if you are providing services across EU borders as a self-employed person, you may need to register for VAT in the destination country (particularly post-Brexit, where the UK VAT registration does not cover EU supplies in all circumstances).

---

Important: Tax law is complex and the interaction of UK tax law with foreign tax systems is particularly so. This guide is intended as a general overview only. The consequences of getting remote work tax arrangements wrong — for you and for your employer — can be significant. Always take advice from a tax adviser qualified in both the UK and your host country before commencing remote work abroad.

How Global Investments Can Help

Many of our clients are senior executives, entrepreneurs, and professionals who have geographic flexibility but complex employment and income structures. Navigating the tax implications of international remote work — and ensuring that property, pension, and investment planning aligns with your employment structure — requires coordinated advice across jurisdictions. Global Investments works with specialist cross-border tax advisers and can help you access the right expertise for your specific situation. Contact our team to discuss your arrangements.