India-U.K. Double Contributions Convention: No Retrospective Benefit for Existing Workers

The India-U.K. Double Contributions Convention (DCC), which came into effect on July 15, 2026, alongside the Comprehensive Economic and Trade Agreement (CETA), offers temporary workers from both countries an exemption from social security contributions in their host country for up to 60 months. However, the benefit is not retrospective: it does not apply to Indians already working in the U.K. or Britons already working in India before that date.

Under normal U.K. rules, temporary foreign workers known as “detached workers” are exempt from National Insurance (NI) contributions for the first 12 months. The DCC extends this exemption to 60 months for those who qualify. But guidance from His Majesty’s Revenue and Customs (HMRC) clarifies that individuals already working in the U.K. immediately before July 15 are not considered detached workers under the DCC. They remain subject to U.K. social security legislation and must pay NI contributions from that date onward.

National Insurance contributions are paid by both employees and employers. Employees typically pay up to 8% of gross salary, while employers contribute up to 15%. HMRC states that Indian employees sent to the U.K. by their Indian employer who were already working in the U.K. before July 15, even if partway through the initial 12-month exemption, will not qualify as detached workers under the DCC. They become liable for U.K. NI from July 15, 2026.

The DCC applies only to employees arriving in the U.K. on or after July 15, 2026, who are not expected to stay more than 60 months. For these individuals, they remain covered by India’s social security system and are exempt from U.K. NI contributions. To claim the exemption, they must obtain a “certificate of coverage” from India’s Employees’ Provident Fund Organisation (EPFO) as proof of making contributions in India.

Mirror provisions apply for British workers sent to India. The convention aims to prevent double taxation of social security contributions for temporary assignments, reducing costs for businesses and workers. However, the non-retrospective clause ensures that only new assignments benefit from the extended exemption, while existing arrangements continue under pre-existing rules.