The Stamp Gets You In, Not On Site: Deploying UK Staff Across the Western Balkans in 2026

A UK controls and instrumentation specialist wins a commissioning package on a wastewater upgrade outside Skopje. The mobilisation plan assumes two engineers, two visits, ten days each. Six weeks later one of them is still on site, unpaid by the client for the overrun, and the finance director is asking why a fixed-price job has acquired a permanent expatriate cost line.

The answer is rarely technical. It is almost always documentary.

The assumption that causes the damage

UK passport holders can currently travel visa-free to Serbia, North Macedonia, Albania and Bosnia and Herzegovina for short stays — generally 90 days within any 180-day period, though the legal basis and the counting method differ from country to country. Because the entry stamp is straightforward, project teams frequently assume the work is too.

It is not. Visa-free entry is an immigration permission for visiting. Business-visitor carve-outs in the region typically cover meetings, negotiation, attendance at conferences and exhibitions, and site inspection. They rarely stretch to installation, commissioning, repair, operator training delivered under contract, or the supervision of local labour. The dividing line in most of these jurisdictions is whether the activity delivers a service to a client under a commercial contract — which is precisely what an exporter has been hired to do.

A useful discipline is to treat the passport as an airline ticket and the work authorisation as the site pass. They are issued by different authorities, on different timescales, for different reasons.

Three regimes, not one

A posting into the region normally triggers obligations in three separate systems, and they do not talk to each other:

• Immigration. A work permit, unified residence-and-work permit, posting notification, or a documented exemption.
• Labour and residence registration. Registration of the posted worker, registration of address with the local police, and in some cases a filing by the host entity.
• Social security. A determination of which country's contributions apply, and on what basis.

Teams that arrange the first and assume the other two follow are the teams that end up with stopped work.

Serbia: the clock starts on arrival

Serbia operates a permit-based system for foreign employment, with a unified residence-and-work permit as the main route and narrower categories for intra-corporate transfer and short-term assignment. The categories are technical and the exemption tests are narrow; the practical message for a UK exporter is that a commissioning engineer on a three-week assignment should be assumed to need authorisation until a local adviser confirms otherwise in writing.

Two operational points catch people out. First, residence registration is time-bound and short — commonly within 24 hours of arrival — and the obligation sits with the host, whether that is a hotel, a subsidiary or a client site. Second, permit processing runs in weeks, not days, and the application is document-heavy: legalised and translated qualifications, employment evidence, and corporate paperwork from the UK side.

North Macedonia: sequence matters

North Macedonia's regime similarly separates short business visits from work, and applications lodged from abroad are generally the cleaner route. The failure mode here is sequencing: teams fly engineers in on a visit to scope the job, then attempt to convert the visit into an assignment on site. That conversion is usually not available, and the engineer leaves while the file restarts.

Where the client is a public body or an EU-financed project, expect the contract itself to impose additional evidence requirements — insurance, registrations, and named-personnel declarations that must match the immigration file exactly.

Albania: permit before presence

Albania has tightened its foreign-employment administration over the past several years, and the working assumption should be that a permit or a documented posting route is required before productive work begins, not after. Documentation standards are strict and translation requirements are enforced at the counter rather than at the border, which means problems surface late — often after the engineer has already travelled.

Bosnia and Herzegovina: two jurisdictions, one project

This is the country that most often defeats a UK mobilisation plan. Labour and foreigner rules are administered at entity level, so a permit issued in the Federation of Bosnia and Herzegovina does not automatically authorise work in Republika Srpska, and the Brčko District runs its own arrangements. A project with sites in two entities is, for compliance purposes, two projects.

For exporters, the practical consequence is that the number of permits required is a function of geography, not headcount. Map the sites before you map the team.

The second ledger: social security

Since the UK left the EU's social security coordination rules, UK-employed staff posted to the Western Balkans sit outside the A1 framework. An A1 certificate remains available to staff employed in an EU member state, but it does not cover a UK payroll.

Whether UK National Insurance continues to apply, whether local contributions become due, and whether a totalisation arrangement exists depends on whether the UK has a bilateral social security agreement with the country in question and on its terms. Where no agreement applies, it is entirely possible to pay both. That is not a compliance failure; it is a cost that was not in the bid.

The fix is administrative rather than clever: obtain a written position from a local payroll adviser before pricing the mobilisation, and carry the worst case in the estimate. Contribution periods also matter for the individual's pension record, which is a retention issue as much as a finance one.

Where projects actually slip

• Document legalisation. Degree certificates, criminal record checks and employment references need apostille and certified translation. This is the single longest lead item.
• Biometrics and card collection. Approval is not issuance. Permit cards are typically collected in person after an appointment.
• The 90/180 count. Multi-country itineraries accumulate days faster than anyone expects. Keep a single register, not four.
• Subcontractor ambiguity. If you second a local partner's staff, establish who the employer is for posting purposes before the contract is signed.
• Scope creep. A ten-day commissioning visit that becomes a six-week residency changes the compliance category entirely.

A pre-mobilisation checklist

1. Map every role and activity against each country's business-visitor definition.
2. Confirm in writing whether a permit, posting notification or exemption applies, per role and per country.
3. Start applications at least eight to twelve weeks before the first travel date.
4. Collect, apostille and translate personal and corporate documents early.
5. Appoint local immigration counsel, or an employer-of-record partner, before signing the contract.
6. Assign responsibility for police and residence registration to a named person on the ground.
7. Obtain a written social security position and budget for dual contributions.
8. Diarise the 90/180 clock across the whole itinerary.
9. Brief travelling staff on what a business visit does and does not permit.
10. Maintain a mobilisation register of dates, sites and activities for audit purposes.
11. Re-run the assessment whenever scope, headcount or duration changes.
12. Build the compliance cost into the tender, not into the post-mortem.

The commercial point

The cost of doing this properly is a fraction of the cost of a stopped project, an unpaid overrun, or an engineer refused entry while a client watches. The Western Balkans remains one of the more accessible non-EU regions for UK firms — but accessibility at the border is not the same as authorisation on site.

A passport gets your people to the airport. Paperwork gets them onto the site. Budget for both, and start the second one earlier than feels necessary.

This article is general information for UK exporters and is not legal advice. Requirements change; verify the current position with local counsel before mobilising.