Working Remotely From Another Country: The Tax Questions to Settle First

The default assumption behind every payroll system is that the employee works where the employer is. Remote work broke that assumption, and tax law has caught up unevenly, which is why the answer to whether you can work from another country is almost always yes, followed by a set of conditions nobody mentions until something goes wrong.

There are four separate questions, and they have four separate answers. Confusing them is the source of most bad advice on this subject.

Question one: Where do you pay income tax?

Income from employment is generally taxable where the work is physically performed. Sitting in Lisbon and typing into a London system means the work was performed in Portugal, whatever the contract says.

Most treaties then provide an exception that keeps taxation at home, provided three conditions are all met: presence in the other country under 183 days in the relevant period, pay not borne by an employer resident there, and pay not borne by a permanent establishment there. All three, as set out in the guide to double taxation agreements.

For a genuine short stay working for a genuinely foreign employer, that exception usually holds. It stops holding when the stay lengthens or when the cost is recharged locally.

Question two: Where are you tax resident?

Residency is a heavier matter than the taxation of a particular payment, because it brings your worldwide income into scope. The 183 day figure appears in most domestic rules, but so do permanent home tests, centre of interests tests and, in the UK, a statutory test where as few as sixteen days can be enough in the right circumstances.

Someone spending seven months a year abroad while keeping a home, a family and a life in the country they came from can easily be resident in both, at which point the treaty tie-breaker decides. The order it applies is set out in the residency guide, and day counting comes third in it, not first.

Question three: Where do social contributions go?

This is the question that gets forgotten, and in high contribution countries it is the larger bill. Social security is governed by entirely separate rules from income tax.

Within the EU and EEA, Regulation 883/2004 determines a single applicable legislation. An employee working temporarily in another member state can remain in their home system by obtaining an A1 certificate, valid for up to twenty four months. Working habitually in two or more states triggers different rules again, generally placing you in the country of residence if a substantial part of the work happens there.

Outside Europe, bilateral totalisation agreements do similar work between specific country pairs. Where none exists, double contributions are a real possibility, and neither authority is obliged to give relief.

An A1 or certificate of coverage takes weeks to issue and cannot usually be backdated far. Applying before departure rather than after is the entire trick.

Question four: What have you done to your employer?

The exposure that ends these arrangements is rarely the employee's. An employee working from another country can create a permanent establishment for the employer there, which brings corporate tax registration, local filing and potentially local corporate tax on attributed profits.

The risk rises sharply where the employee:

• Concludes contracts or habitually plays the principal role leading to their conclusion, which creates a dependent agent permanent establishment almost immediately.
• Occupies a fixed place of business, including a home office that the employer requires or reimburses.
• Is senior enough that decisions taken there are attributable to the business.
• Stays long enough that the presence stops looking temporary, with twelve months a common threshold and six months a common trigger for scrutiny.

There is a second employer obligation that arrives faster: payroll withholding. Many countries require a foreign employer to register and operate local payroll once an employee performs work there beyond a short threshold, regardless of permanent establishment. This is what turns a casual arrangement into a compliance project.

Rough thresholds worth knowing

General guidance only. Individual countries depart from these thresholds in both directions, and a handful count days differently.

Digital nomad visas do not solve the tax question

Spain, Portugal, Italy, Greece, Estonia and around forty other countries now issue remote work visas. They solve immigration, which is a genuine problem worth solving. Most of them explicitly make the holder tax resident, which is the opposite of what applicants frequently assume.

Spain's version is the exception worth knowing: holders of the digital nomad visa can apply for the special expatriate regime and be taxed at a flat 24%, which is covered in the guide to the Beckham law. That is a genuinely favourable outcome, and it is a specific policy rather than a general feature of these visas.

What to do before asking

1. Decide the length first. A four week request and a six month request are different conversations and should not be combined.
2. Check whether your employer has an entity in the destination. If it does, the problem is usually solvable. If it does not, expect resistance and understand why.
3. Apply for an A1 or certificate of coverage in good time.
4. Keep evidence of days. Boarding passes and card transactions, not a calendar.
5. Model the net outcome if residency does shift, using the cross-border comparison or the individual country calculators.