What is the overall fiscal impact of the 2026 UK/EU Treaty in relation to Gibraltar on Gibraltar’s pension system?

Short answer

The 2026 UK/EU Treaty in relation to Gibraltar applies a Protocol on Social Security Coordination between Spain and Gibraltar. Where a worker has contributed in both systems, periods are aggregated and each side pays a pro rata share linked to its own contribution record, which is expected to limit Gibraltar’s standalone pension liability for cross-border workers.

Detailed answer

Under the Protocol, periods of insurance in Spain and Gibraltar are added together to test eligibility, and each jurisdiction then pays only the proportion of the pension that corresponds to periods completed under its own legislation. The pensioner receives whichever is higher of the standalone or pro rata entitlement.

The principle is that each system funds benefits linked to its own contribution record. Gibraltar continues to pay for periods completed under its legislation.

What is not yet known

The precise long-term fiscal effect has not been quantified in official published material. It will depend on the contribution histories of frontier workers and on how each system’s rules interact in practice. Spanish trade unions have called for an additional mechanism to balance pensions for cross-border workers, and no such mechanism has yet been established.

Status: the Agreement has been provisionally applied since 15 July 2026, pending formal ratification.