Social Security Agreements and Posted Workers in Hungary 2026

Introduction

The cross-border posting of workers is a fundamental feature of the European single market and of international business more broadly. For employers deploying staff from or to Hungary, the social security implications of such postings are among the most complex and—if mishandled—potentially costly aspects of the arrangement. The applicable rules derive from a combination of EU Regulation 883/2004 on the coordination of social security systems, bilateral social security agreements between Hungary and non-EU/EEA states, and domestic Hungarian social security legislation, principally Act CXXII of 2019 on the System of Social Security Service Entitlements (a társadalombiztosítás ellátásaira jogosultakról, valamint ezen ellátások fedezetéről szóló 2019. évi CXXII. törvény, “Tbj.”).

The year 2026 brings heightened scrutiny from the National Tax and Customs Administration (Nemzeti Adó- és Vámhivatal, “NAV”) on the correct application of contribution exemptions, the treatment of posting-related allowances, and the qualification of arrangements that may constitute disguised employment rather than genuine postings. This article provides a comprehensive analysis of the legal framework and practical considerations applicable to posted workers in Hungary in 2026.

EU Regulation 883/2004: The Primary Coordination Framework

Principle of Single Applicable Legislation

The cornerstone of the EU social security coordination regime is the principle that a worker is subject to the social security legislation of only one Member State at a time (Article 11(1) of Regulation 883/2004). For posted workers, the relevant rule is set out in Article 12(1), which provides:

A person who pursues an activity as an employed person in a Member State on behalf of an employer which normally carries out its activities there and who is posted by that employer to another Member State to perform work on that employer’s behalf shall continue to be subject to the legislation of the first Member State, provided that the anticipated duration of such work does not exceed 24 months and that the person is not sent to replace another posted person.

This means that a worker posted from, say, Germany to Hungary for a period not exceeding 24 months will continue to be subject to the German social security system, provided the conditions of Article 12(1) are met. The worker and the employer are exempt from Hungarian social security contributions for the duration of the posting.

The A1 Certificate

The practical instrument for evidencing the continued application of the sending state’s social security legislation is the A1 certificate (formerly E101). The A1 certificate is issued by the competent social security institution of the sending state and must be carried by the posted worker and presented to the authorities of the host state on request.

Key points regarding the A1 certificate:

• The A1 certificate is binding on the institutions and courts of the host state (as confirmed by the CJEU in Altun (C-359/16) and AFMB (C-610/18)), meaning that Hungarian authorities may not unilaterally disregard an A1 certificate issued by another Member State, even if they suspect it was improperly issued;
• However, the host state may request the withdrawl or review of an A1 certificate by the issuing state through the Administrative Commission for the Coordination of Social Security Systems;
• Where no A1 certificate has been obtained, the default position is that the worker is subject to the social security legislation of the state in which the work is performed—i.e., Hungary—from the first day of work;
• The A1 certificate must be obtained before the posting begins, though retroactive issuance is possible in exceptional circumstances.

Multi-State Workers

For workers who habitually pursue activities in two or more Member States (e.g., cross-border commuters, travelling salespersons, or consultants with clients in multiple countries), the applicable legislation is determined under Article 13 of Regulation 883/2004, which generally points to the legislation of the state of residence if the worker performs a substantial part (25% or more) of their activity there, or to the legislation of the employer’s registered office otherwise. These rules require careful analysis and documentation, and an A1 certificate must likewise be obtained.

Bilateral Social Security Agreements with Non-EU States

Hungary’s Treaty Network

Hungary has concluded bilateral social security agreements with a number of non-EU/EEA states, including (among others):

• Republic of Korea (in force since 2007);
• Canada (in force since 2003);
• Australia (in force since 2012);
• Serbia (in force since 2014);
• Turkey (in force since 2015);
• Japan (in force since 2014);
• India (in force since 2013);
• United States — notably, Hungary does not have a bilateral social security agreement with the United States, which creates significant complications for U.S.-Hungary postings.

Core Provisions

Bilateral social security agreements typically address the following matters:

1. Applicable legislation: Like EU Regulation 883/2004, bilateral agreements designate the social security system applicable to posted workers, generally providing for continued application of the sending state’s legislation for postings of up to 24 months (some agreements provide for extensions);
2. Certificate of coverage: The equivalent of the A1 certificate in a bilateral agreement context. The certificate is issued by the competent authority of the sending state and proves that the posted worker remains subject to the sending state’s social security system;
3. Pension aggregation (összeszámítás): Periods of insurance completed in one contracting state are aggregated with periods completed in the other state for the purpose of establishing entitlement to pension benefits. Each state pays a pro rata share of the pension corresponding to the periods completed under its own legislation;
4. Healthcare access: Bilateral agreements may provide for healthcare access in the host state, either through the public system or through private insurance, depending on the terms of the agreement;
5. Export of benefits: The ability to receive pension or other social security benefits while residing in the other contracting state.

Absence of a Bilateral Agreement

Where Hungary does not have a bilateral social security agreement with the worker’s home country (e.g., the United States, China, or Brazil), the default position is that the worker is subject to Hungarian social security contributions from the first day of work in Hungary, regardless of whether contributions are also payable in the home country. This can result in double contribution liability, which must be managed through contractual arrangements (e.g., tax equalisation policies) and, where possible, through voluntary arrangements with the home country’s social security system.

Contribution Exemptions and the Correct Contribution Base

Exemptions Under the Posting Rules

Where a valid A1 certificate or certificate of coverage under a bilateral agreement is in place, the employer and the posted worker are exempt from Hungarian social security contributions. This includes:

• Social contribution tax (szociális hozzájárulási adó, “szocho”) — currently 13% of the gross remuneration;
• Employee social security contributions (társadalombiztosítási járulékok) — currently 18.5% of gross remuneration (comprising 10% pension contribution, 7% healthcare contribution, and 1.5% labour market contribution).

The exemption is conditional on the validity and correctness of the A1 certificate or certificate of coverage. NAV is empowered to verify the authenticity of certificates and to request their review by the issuing authority.

Determination of the Correct Contribution Base

Where the posted worker is subject to Hungarian social security (i.e., where no valid exemption applies), the contribution base must be correctly determined. The contribution base is generally the gross remuneration of the worker, broadly defined to include:

• Base salary;
• Performance bonuses, commissions, and other variable compensation;
• Housing allowances and accommodation benefits provided to the posted worker;
• Travel and relocation allowances;
• Other benefits in kind (e.g., company car, meal vouchers, health insurance premiums paid by the employer).

The question of which allowances form part of the contribution base and which are exempt is the subject of intense scrutiny by NAV, as discussed below.

Tax-Exempt Posting Allowances vs. Disguised Wages

The Legal Framework

Hungarian tax and social security law provides for certain tax-exempt allowances that may be paid to posted workers without inclusion in the social security contribution base. These include:

• Per diem allowances (napidíj) for business travel, up to the limits prescribed by Government Decree 285/2011 (XII. 22.) — currently HUF 3,000 per day for domestic travel and varying amounts for international travel, depending on the destination;
• Accommodation costs reimbursed on an actual-cost basis against invoices;
• Travel costs (airfare, train, fuel) reimbursed on an actual-cost basis.

However, the exemption is strictly conditional on the genuine character of the allowance—i.e., it must represent a reimbursement of actual costs incurred by the posted worker in connection with the posting, or a lump-sum payment that does not exceed the prescribed limits.

NAV 2026 Audit Focus: Disguised Wages

In 2026, NAV has identified the treatment of posting-related allowances as a priority audit area. The concern is that employers may be structuring payments to posted workers as tax-exempt posting allowances when, in substance, the payments constitute remuneration (i.e., disguised wages) that should be subject to income tax and social security contributions. Red flags that may trigger NAV scrutiny include:

• Excessive per diem payments: Per diem allowances that substantially exceed the prescribed daily limits or that are paid without evidence that the worker incurred actual subsistence costs;
• Long-term accommodation allowances: Housing allowances paid on a continuing basis to workers who have established a permanent or semi-permanent residence in Hungary, suggesting that the “posting” is no longer temporary in nature;
• Lump-sum payments labelled as travel allowances: Flat monthly payments labelled as travel reimbursements but not supported by evidence of actual travel;
• Dual housing: Situations where the employer pays for both housing in Hungary and the worker’s home-country accommodation, raising the question of whether the worker’s centre of vital interests has shifted to Hungary;
• Duration of the posting: Postings that exceed the statutory 24-month limit (for EU postings) or the duration specified in the applicable bilateral agreement, raising questions about the continued validity of the contribution exemption and the characterisation of allowances.

Consequences of Reclassification

Where NAV reclassifies a purportedly tax-exempt allowance as taxable remuneration, the consequences include:

• Retroactive assessment of personal income tax (15%) and social security contributions (employee and employer side) on the reclassified amounts, for the entire period under audit (the general limitation period is five years);
• Default interest (késedelmi pótlék) on the unpaid taxes and contributions, at a rate linked to the central bank base rate plus 5 percentage points;
• Tax penalties (adóbírság) of up to 50% of the tax shortfall (or up to 200% in cases of deliberate evasion);
• Employer liability: The employer is jointly and severally liable for the employee-side contributions and may also face separate penalties for failure to comply with withholding and reporting obligations.

Private Healthcare vs. TB (Public Social Insurance)

The Choice

Posted workers who are exempt from Hungarian social security contributions by reason of an A1 certificate or a bilateral agreement certificate of coverage are not covered by the Hungarian public health insurance system (Társadalombiztosítás, “TB”) during the period of the posting. In such cases, healthcare in Hungary must be arranged through:

• The European Health Insurance Card (EHIC) or the S1 form (for posted workers who remain insured under the sending state’s social security system within the EU/EEA);
• Private health insurance procured by the employer or the worker, which is a condition for obtaining and maintaining a residence permit in Hungary for non-EU/EEA nationals.

For non-EU nationals posted to Hungary under a bilateral agreement, the terms of the agreement will determine whether the worker has access to the Hungarian public healthcare system. Where the agreement does not provide for healthcare coverage, private health insurance is essential.

Practical Implications

The distinction between TB coverage and private health insurance has practical implications beyond the immediate question of healthcare access:

• Pension accrual: Workers exempt from Hungarian social security do not accrue pension rights in Hungary. Where pension aggregation is available under a bilateral agreement, periods of posting may nonetheless be taken into account for the purpose of establishing pension entitlement in the home country;
• Maternity and parental benefits: Posted workers who are exempt from Hungarian social security are not entitled to Hungarian maternity or parental benefits, though they may be entitled to benefits under the sending state’s legislation;
• Unemployment benefits: Similarly, posted workers do not accrue unemployment benefit entitlements in Hungary. Upon termination of the posting, the worker must claim unemployment benefits in the home state, with the aggregation of insurance periods where applicable under EU law or a bilateral agreement.

Pension Aggregation and Export

How Pension Aggregation Works

For workers who have accumulated insurance periods in both Hungary and another state (whether an EU Member State or a bilateral agreement partner), the calculation of pension entitlements follows the aggregation and pro rata method:

1. Aggregation: All insurance periods completed in both states are added together to determine whether the worker meets the minimum insurance period required for pension entitlement (currently 20 years for a full old-age pension in Hungary, with a minimum of 15 years for a reduced pension);
2. Theoretical amount: Each state calculates the pension benefit the worker would have received if all aggregated periods had been completed under its own legislation (the “theoretical amount”);
3. Pro rata amount: Each state then pays a proportion of the theoretical amount corresponding to the ratio of the periods completed under its own legislation to the total aggregated periods.

This method ensures that workers are not penalised for having divided their career between two or more countries and that each state bears a fair share of the pension burden.

Export of Hungarian Pension

Hungarian old-age pensions are generally exportable—i.e., they can be paid to a beneficiary residing abroad. Within the EU/EEA, the export of pensions is guaranteed by Regulation 883/2004. For bilateral agreement partner states, the terms of the agreement govern whether and under what conditions pension export is available. Where no bilateral agreement exists, Hungarian law does not restrict pension exports, but the beneficiary may face practical difficulties with cross-border bank transfers and currency conversion.

NAV Audit Trends in 2026

Increased Scrutiny of Posting Arrangements

NAV’s 2026 audit programme places significant emphasis on the correct application of social security rules in the context of cross-border postings. Key areas of focus include:

• Validity of A1 certificates and certificates of coverage: NAV will verify that the posted worker holds a valid certificate and that the conditions for the exemption continue to be met throughout the posting period;
• Characterisation of payments: As discussed above, NAV will scrutinise payments labelled as posting allowances to determine whether they are genuine reimbursements or disguised wages;
• Duration and substance of postings: NAV may challenge the characterisation of a “posting” where the worker has been present in Hungary for an extended period, has established a permanent residence, or is integrated into the host entity’s operations in a manner inconsistent with a temporary assignment;
• Temporary agency workers: Arrangements involving the supply of temporary workers from abroad are subject to particular scrutiny, as they may fall outside the scope of the posting exemption if the sending entity does not meet the requirements of a genuine employer under Regulation 883/2004;
• Chain postings: Successive postings of different workers to the same position, or the replacement of one posted worker by another to circumvent the 24-month time limit, may be challenged under the anti-avoidance provisions of Regulation 883/2004 and domestic law.

Best Practices for Employers

To minimise the risk of adverse audit findings, employers posting workers to or from Hungary should:

1. Obtain certificates proactively: Ensure that A1 certificates or bilateral certificates of coverage are obtained before the posting begins and are renewed or extended as necessary;
2. Maintain detailed records: Keep comprehensive records of posting arrangements, including assignment letters, employment contracts, payroll records, travel and accommodation receipts, and per diem calculations;
3. Review allowance structures: Regularly review the structure and quantum of posting-related allowances to ensure compliance with the prescribed limits and genuine reimbursement of costs;
4. Monitor posting duration: Track the cumulative duration of each posting and take timely action to extend certificates or adjust the social security position before the 24-month limit is exceeded;
5. Engage specialist advisers: The intersection of immigration, labour, tax, and social security law in cross-border postings is one of the most complex areas of legal practice. Specialist advisory support is essential to ensure compliance and to defend against NAV challenges.

Conclusion

The social security landscape for posted workers in Hungary in 2026 is characterised by a well-developed legal framework—rooted in EU Regulation 883/2004 and an extensive network of bilateral agreements—coupled with increasingly rigorous enforcement by NAV. Employers must pay close attention to the correct application of posting exemptions, the characterisation of allowances, and the duration and substance of posting arrangements. The consequences of non-compliance are financially significant, and proactive compliance planning is both the most cost-effective and the most legally prudent course of action.

Dr. Ildikó Nagy and her team advise employers and employees on all aspects of cross-border social security, posting arrangements, and NAV audit defence. For a consultation, please contact our office.