India–UK Social Security Agreement: What It Means for Cross-Border Workforce Costs and Mobility

The DCC principally coordinates social security contribution liability. It does not change the rules governing access to social security benefits. 

The starting principle under the DCC is straightforward: an employee will generally be subject to the social security legislation of the country where the employment is carried out, irrespective of where the employee resides or where the employer is based. 

Where an employee works for an employer that normally carries out its activities in one country and is sent by that employer to work temporarily in the other country, the employee may continue to be covered by the social security system of the home country, provided the applicable conditions are satisfied and the anticipated period of work in the host country does not exceed 60 months. 

An employee sent by an India-based employer to work temporarily in the UK on or after 15 July 2026 can remain subject to Indian social security legislation where the detached-worker conditions are satisfied and the period of work in the UK is not expected to exceed 60 months.

During the qualifying period, the employee and employer will not be required to pay UK National Insurance contributions. They should obtain a Certificate of Coverage from India's Employees' Provident Fund Organisation (EPFO) as evidence that Indian social security legislation continues to apply. 

Similarly, an employee sent by a UK employer to work temporarily in India on or after 15 July 2026 can remain subject to UK social security legislation where the detached-worker conditions are satisfied and the period of work in India is not expected to exceed 60 months.

The employee and employer will continue to pay applicable UK National Insurance contributions and will not be liable for Indian social security contributions covered by the DCC in respect of the qualifying employment. 

The 60-month exemption should not be treated simply as an automatic exemption for any international assignment lasting less than five years.

HMRC's current technical guidance states that the detached-worker provision applies where the employee is employed in the home country, works for an employer that normally carries out its activities there, is sent by that employer to work in the other country, and the host-country employment is not expected to exceed 60 months. 

HMRC further explains that, for the detached-worker provision to apply, the employee must have been subject to the social security legislation of the home country and the relevant employee and employer contributions must have been paid, or treated as paid, for at least 30 days before the move or for the calendar month preceding the commencement of the detachment. 

Accordingly, employers should assess the employee, employer relationship, prior social security coverage, assignment structure and anticipated duration rather than relying on duration alone.

Separate rules also apply to categories such as aircrew, employees working on vessels at sea, government employees and members of the armed forces. 

The DCC does not apply to self-employment. 

An assignment does not necessarily lose detached-worker status merely because its expected duration changes after it has started.

Where the assignment was originally expected to last less than 60 months but is subsequently extended to 60 months or beyond, the employee may continue to remain within the home-country system until the host-country employment ends or the employee reaches 60 months of employment in the host country, whichever occurs first. 

Once the 60-month period is exhausted, the general rule ordinarily applies, meaning the employee becomes subject to the social security legislation of the country in which the employment is carried out, unless another provision or agreed exception applies. 

This is one of the most important transitional aspects of the new framework.

The 60-month detached-worker treatment does not automatically apply retrospectively to employees who were already working in the host country immediately before the DCC entered into force.

An employee sent by an Indian employer who was already working temporarily in the UK immediately before 15 July 2026 and was part-way through the previous 52-week UK National Insurance exemption does not become a detached worker under the DCC.

According to HMRC guidance, such an employee becomes subject to UK social security legislation from 15 July 2026 and becomes liable to UK National Insurance contributions. 

Host employers in the UK should also consider whether UK domestic National Insurance rules create employer contribution obligations, including potential secondary Class 1 National Insurance contributions. 

Where an employee sent by a UK employer was already working in India and paying UK National Insurance contributions immediately before 15 July 2026 as part of the previous 52-week overseas liability period, that employee does not become a detached worker under the DCC.

From 15 July 2026, the employee becomes subject to Indian social security legislation and the existing UK Class 1 National Insurance contribution liability ceases. The employee and employer may consequently have Indian social security obligations. 

This distinction makes it important for employers to analyse existing assignments separately from assignments commencing on or after 15 July 2026.

A Certificate of Coverage (CoC) provides evidence of which country's social security legislation applies to an employee working temporarily in the other country.

For qualifying employees sent from India to the UK, the certificate should be obtained from India's Employees' Provident Fund Organisation (EPFO). It provides evidence that the employee continues to make Indian social security contributions covered by the DCC and is not liable to UK National Insurance contributions. 

For qualifying employees sent from the UK to India, a Certificate of Coverage can be obtained from HM Revenue & Customs (HMRC). HMRC currently provides for applications through form CA9107. The certificate provides evidence that UK National Insurance legislation continues to apply and that the employee is not liable for Indian social security contributions covered by the DCC under the DCC. 

Employers should therefore incorporate the CoC process into pre-assignment planning, rather than treating it as an administrative step after the employee has relocated.

Reduced Risk of Dual Social Security Costs

For qualifying detached-worker arrangements, employees and employers should not be required to make social security contributions in both India and the UK for the same qualifying period.

Instead, contributions continue in the home-country system for up to 60 months, subject to the DCC conditions. 

For businesses regularly moving employees between India and the UK, this can significantly change the social security component of international assignment costs.

More Predictable Mobility Planning

Social security contributions can represent an important element of the overall cost of an international assignment alongside remuneration, individual tax, immigration, relocation and other employment-related expenses.

The DCC provides a clearer framework for determining where social security contributions should arise for qualifying employee movements between India and the UK.

This gives HR, mobility, finance and payroll teams an opportunity to incorporate social security treatment into assignment costing at an earlier stage.

Payroll Coordination Remains Critical

The DCC removes potential dual contribution liability only where the relevant conditions are satisfied. It does not eliminate payroll administration.

Employers still need to determine which country's social security legislation applies, ensure contributions are correctly calculated and remitted in that jurisdiction, obtain the appropriate Certificate of Coverage and maintain records supporting the treatment adopted.

Coordination between HR, global mobility, payroll and finance teams therefore remains important.

Eligibility Should Be Assessed Before the Assignment Begins

The fact that an employee will work in the other country for less than 60 months does not, by itself, establish eligibility.

Among other matters, employers should consider:

1. whether the individual is an employee within the scope of the DCC;
2. whether the employer normally carries out its activities in the home country;
3. whether the employee is being sent to the other country on the employer's behalf;
4. whether the employee satisfies the relevant prior social security coverage requirements;
5. the anticipated duration of the assignment;
6. whether an earlier period of detachment affects eligibility for a new period; and
7. whether a Certificate of Coverage has been obtained. 

HMRC guidance also provides a waiting-period rule for repeat detachments. Generally, after completing a period of detachment, a new qualifying detachment cannot begin until six months have elapsed. Where the previous period was shorter than six months, the waiting period is equal to that shorter period. 

Businesses moving employees between India and the UK should consider:

1. Identifying all existing India–UK assignments and determining whether the transitional rules applicable from 15 July 2026 affect their social security position.
2. Reviewing planned assignments separately, particularly assignments commencing on or after 15 July 2026.
3. Assessing detached-worker eligibility before deployment, including the employment relationship, home-country coverage and anticipated duration.
4. Initiating the Certificate of Coverage process early through EPFO or HMRC, as applicable.
5. Aligning home- and host-country payroll treatment with the social security legislation determined under the DCC.
6. Revisiting assignment cost projections to reflect the applicable social security contribution treatment.
7. Monitoring assignment extensions, particularly where the assignment may approach or exceed the 60-month limit.
8. Maintaining appropriate supporting documentation, including CoCs and evidence supporting the employee's eligibility and assignment structure.
9. Separately reviewing special categories of employees, including aircrew, mariners, government employees and armed forces personnel, where different DCC rules apply. 

The India–UK Double Contributions Convention removes an important source of potential duplication for qualifying cross-border assignments.

For qualifying employees commencing temporary assignments on or after 15 July 2026, the ability to remain within the home-country social security system for up to 60 months can provide greater certainty around the social security cost of international mobility. 

However, the treatment is not automatic. Eligibility depends on the circumstances of the employee, employer and assignment, and employees already on assignment when the DCC entered into force can be subject to materially different transitional rules.

For organisations operating across the India–UK corridor, integrating social security analysis into assignment planning can therefore support both compliance and more informed workforce-cost decisions.

Managing cross-border employee assignments requires coordination across payroll, HR, mobility and employment-related compliance requirements.

Vistra can support businesses in assessing the operational implications of India–UK employee movements, coordinating home- and host-country payroll requirements, supporting Certificate of Coverage processes and helping organisations establish appropriate controls and documentation around international assignments.

For businesses with employees who were already on assignment before 15 July 2026, a separate review may also be appropriate to determine the impact of the transitional rules and any resulting payroll or social security changes.

The new social security framework may materially change the contribution cost and payroll administration of qualifying assignments between India and the UK.

Speak to Vistra about reviewing existing and planned India–UK employee assignments and aligning your cross-border payroll and social security processes with the new framework.