Social Security Benefits: Polygamy
The question
To ask the Secretary of State for Work and Pensions, what estimate his Department has made of the annual cost to the public purse of additional benefit payments made in respect of multiple spouses under legacy benefit arrangements.
Answered by Sir Stephen Timms
Polygamous marriages are illegal in the UK. Immigration rules have generally prevented the formation of polygamous households in this country since 1988. Under successive governments access to benefit support for additional spouses is only available where the marriage took place in a country where the practice is legal. The Department does not hold information in respect of Pension Credit. However, the most recent published data (August 2025) from the Housing Benefit Single Housing Extract (SHBE) indicates that there are fewer than ten households where claimants are recorded as being in a polygamous marriage formed in another country. In these exceptional cases, there is no financial benefit as more would be paid in benefits if the additional person claimed as a single person. There are no plans to change the existing benefit rules.
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