Remote Workers in Bulgaria: Keep Your Foreign Employer (2026 Guide)

Most EU remote employees we talk to assume they can simply move to Bulgaria and keep their German, Dutch, or French employment contract unchanged. Technically, that works for the first 183 days. After that, the legal structure must change — or both you and your employer end up with problems.

This is the guide for people who have a stable foreign employment contract and want to live in Bulgaria: senior engineers, consultants, product managers, data scientists, designers, account managers, finance professionals, pharma reps, and the many remote employees of US and EU companies who never need to step into the head office. It is the hardest remote-work scenario to get right, because the problem is not only your tax — it is also your employer's corporate tax exposure in Bulgaria.

We walk through the 183-day rule, the permanent establishment (PE) risk that worries tax departments, the new EU Teleworking Framework Agreement, and the three clean structures that actually work: Employer of Record, Freelancer, and EOOD service company. Every path ends with you paying Bulgarian tax — among the lowest in the EU — and your employer sleeping well at night.

The 183-Day Rule and Bulgarian Tax Residency

The starting point is clear: under Bulgarian law (§ 4 ЗДДФЛ), you become a Bulgarian tax resident if any one of the following is true:

• You are physically present in Bulgaria for more than 183 days in any 12-month period;
• Your centre of vital interests (economic, family, social ties) is in Bulgaria; or
• You have a permanent dwelling in Bulgaria available for personal use, combined with the presence and vital-interest tests.

Bulgarian tax residency means Bulgaria taxes your worldwide income, including employment income, at the flat 10% rate.

The treaty overlay — Article 15 OECD

Most EU-Bulgaria bilateral tax treaties follow Article 15 of the OECD Model Tax Convention. The default rule is that employment income is taxed in the state of residence, unless the work is physically performed in another state. A short-term exemption protects cross-border workers if all three of the following conditions are met:

1. The employee spends no more than 183 days in the host state during the relevant 12-month period.
2. The remuneration is paid by, or on behalf of, an employer not resident in the host state.
3. The remuneration is not borne by a permanent establishment (PE) of the employer in the host state.

If all three conditions are met, the employee remains taxable only in the original state of residence. Break any one of them — and remote workers moving to Bulgaria for the long term break condition (1) immediately — and Bulgaria acquires taxing rights under the treaty.

Permanent Establishment Risk for Your Employer

This is the problem your tax department cares about. When an employee works remotely from a country where the employer has no registered presence, the employee's home office can — under certain conditions — create a permanent establishment (PE) of the employer in the remote country. A PE means:

• The employer has to register locally, file local corporate tax returns, and pay Bulgarian corporate income tax on the profits attributable to the PE.
• The employer acquires local payroll obligations, social security contributions, VAT registration (in certain cases), and local accounting obligations.
• The employee's activity may fall within scope of Bulgarian transfer-pricing rules.
• The employer faces potential retroactive assessments and penalties if the PE is discovered during an audit.

When is PE risk high?

• Senior management roles with contract-signing authority ("dependent agent PE").
• Core revenue-generating activities performed habitually from the home office.
• Client-facing work from a Bulgarian address (meetings, client deliveries, invoicing from Bulgaria).
• Long-term, habitual presence (more than 6 months, established pattern).
• Employer-provided infrastructure (branded office, dedicated meeting rooms, signage).

When is PE risk low?

• Junior or mid-level employees without signing authority.
• Auxiliary activities (preparatory, support, back-office).
• Short-term or occasional presence.
• Generic home office with no employer branding or infrastructure.
• Clear substance in the employer's home country (headquarters, client base, decision-making).

In practice, no competent international tax department will accept a long-term Bulgarian home office for a senior employee without restructuring the relationship — the risk tolerance simply is not there. That is why the three options below exist.

The Three Clean Structures

Option 1 — Employer of Record (EOR)

An Employer of Record is a licensed Bulgarian entity that becomes your formal local employer while your real employer retains all substantive control. The EOR handles Bulgarian payroll, tax withholding, social security, employment contract, annual leave, sick leave, and all HR compliance. Your employer pays the EOR a monthly fee (typically 8-15% of gross salary depending on complexity).

Pros:

• Preserves the employment relationship in substance — you keep holiday accrual, stock options, insurance benefits, performance bonus structure.
• Zero PE risk for the foreign employer (the EOR is the legal counterparty on Bulgarian soil).
• Fast to set up — days, not weeks.
• You stay on "employee" status for visa, mortgage, and credit purposes.

Cons:

• Monthly EOR fee layered on top of normal employer cost.
• Stock option and benefits plans may need restructuring to flow through the EOR.
• Employer must be willing to convert the contract — not always straightforward for US companies unfamiliar with the model.

Option 2 — Freelancer (свободна професия)

You register as a Bulgarian freelancer and invoice your former employer for your services. The employment contract ends; a services contract replaces it.

Pros:

• 7.5% effective tax rate under Art. 29(1)(3) ЗДДФЛ (25% automatic expense deduction + 10% on the remaining 75%).
• Minimal admin — БУЛСТАТ registration at roughly EUR 5.
• Zero PE risk for the former employer.
• Fast: you can start invoicing within days.

Cons:

• You lose formal employment status — stock options, unemployment insurance, statutory severance, parental leave protections.
• Risk of disguised employment (re-characterisation) if the former employer is your only client and you work exclusively for them on full-time hours with no other clients, no equipment independence, and no project autonomy. Both Bulgarian and foreign tax authorities increasingly scrutinise this pattern.
• Personal liability is unlimited.

Option 3 — EOOD Service Company

You register a Bulgarian single-shareholder limited liability company (EOOD, minimum capital EUR 1), which enters into a service agreement with your former employer. Your EOOD invoices for the services; you are paid as owner-manager plus dividends.

Pros:

• 15% combined effective rate (10% CIT + 5% dividend tax).
• Limited liability protection from business claims.
• Scalable — you can add employees, subcontractors, other clients.
• Zero PE risk for the former employer (clean B2B service relationship).
• Investor-friendly if you later want to expand into a real consultancy.

Cons:

• More admin than the freelancer path — monthly bookkeeping, corporate filings, annual financial statements.
• Same disguised-employment risk as freelancer if you work exclusively for one client on employee-like terms.
• Small KYC fee (EUR 100-500, non-refundable) at bank account opening.

Social Security: A1 Certificates and the 2023 Teleworking Agreement

Under EU Regulation 883/2004 on social security coordination, the default rule is that an individual is subject to the social security legislation of the state where they physically work. For a remote employee who relocates to Bulgaria, that means Bulgarian social security applies from the moment of physical relocation — unless an exception is invoked.

The 2023 EU Framework Agreement on Cross-Border Teleworking

Effective 1 July 2023, EU member states signed a framework agreement allowing cross-border teleworkers to remain under the social security system of the employer's country even when they habitually work less than 50% of their working time from another member state — provided both the employee's residence country and the employer's country are signatories, and both the employer and the employee apply for the exception.

• Above 50% cross-border remote work: the default EU 883/2004 rule applies — social security of the country where the employee physically works.
• 25% - 49% cross-border remote work: under the 2023 agreement, an exception can be granted to keep the employer-country social security.
• Below 25%: already covered by EU 883/2004 default rules in favour of the employer country.

The A1 certificate

The A1 certificate confirms which member state's social security applies to an individual in a cross-border situation. In Bulgaria, A1 certificates are issued by the National Revenue Agency (NRA). Depending on the outcome of the analysis:

• If Bulgarian social security applies (normal case for a permanent move), the NRA issues the A1.
• If the employer-country social security still applies under the 2023 Framework Agreement or a specific exception, the employer-country authority issues the A1 instead.

The A1 is what you show to auditors on both sides of the border to demonstrate that social security contributions are being paid in the correct jurisdiction. It is not optional administrative paperwork — it is the single most important compliance document in a cross-border employment relationship.

What You Actually Take Home

A rough comparison of net take-home for a mid-senior EU remote employee earning a gross equivalent of EUR 80,000 per year:

Figures are illustrative — actual numbers depend on deductions, social contribution bases, family status, and specific contract terms. The direction is consistent: a remote worker who restructures cleanly in Bulgaria keeps between EUR 15,000 and EUR 25,000 more per year than the same person on the same gross in Germany, France, or Belgium.

Setup Path for a Remote Worker

1. Month -2: talk to your employer's HR and tax departments about the three options. Get written sign-off on which structure they accept. Some companies have explicit policies — US tech often supports EOR, European mid-caps sometimes prefer the clean freelancer/EOOD path.
2. Month -1: we prepare the chosen Bulgarian structure — EOR engagement, freelancer registration, or EOOD incorporation. Parallel: plan your departure-country tax exit (deregistration, final payroll, pension arrangements).
3. Week of move: arrive in Bulgaria, register your rental contract, submit EU residence application at the Migration Directorate (if EU citizen). Obtain LNCH personal number.
4. Week 1-2 after move: NRA registration as Bulgarian tax resident, A1 certificate application, NHIF coverage confirmation, first monthly payroll or invoice.
5. Month 2-3: first net salary or dividend, first Bulgarian social contributions paid, first monthly accounting cycle complete.
6. Following year: first Bulgarian annual tax return, final foreign tax return for the year of departure, obtain NRA tax residency certificate for treaty purposes.

Common Mistakes Remote Workers Make

1. "I'll just keep quiet about moving"

Your employer's HRIS has your registered address. Your payroll flows through the employer-country system. Your home country's tax authority has access to EU automatic exchange of information under DAC. Any honest auditor will see the pattern within 12 months. A detected "quiet move" creates problems for both you (penalties for under-reporting) and your employer (PE exposure, retroactive payroll). Always restructure formally.

2. Assuming the home country still has taxing rights because "the employer is there"

Article 15 OECD ties employment taxation to the state where the work is physically performed. Once you are in Bulgaria working from a Sofia apartment, Bulgaria has the primary taxing right under the treaty — not the employer's country. The only exception is the short-term 183-day rule, which does not apply to permanent relocations.

3. Running the EOR and paying yourself a minimum wage to avoid Bulgarian social security

The NRA actively audits patterns where the declared salary is suspiciously low for the role and the company. A Bulgarian minimum wage contract for a senior software engineer is a red flag. The correct salary is the market rate, which the Bulgarian NHIF cross-references with published industry statistics and NSSI classifications.

4. Not applying for an A1 certificate

Cross-border employment without a clear A1 situation creates uncertainty on both sides. At audit, the employer's tax department will ask for your A1. At retirement, your pension entitlement will depend on years correctly attributed to each system. Get the A1 from the NRA or the employer-country authority and keep it in your tax file.

5. Registering at a police station in Bulgaria

Outdated guides still refer to "local police registration" or "GRAO" for EU citizens. This is incorrect. The Migration Directorate is the only authority for EU citizen residence. See our address registration guide for foreigners and the detailed EU residence permit walkthrough.

Frequently Asked Questions

Disclaimer: This article provides general information about cross-border remote work arrangements and does not constitute legal or tax advice. The 183-day rule, PE risk, and EU social security coordination are fact-specific and require tailored advice. Consult our team for advice tailored to your employer country, role, and salary level. Last updated: April 12, 2026.