The UK's Brexit divorce bill could be as little as €25bn (£21bn) a Brussels-based think tank has claimed.
A study by researchers at Bruegel argued that a rebate on contributions would sharply limit a possible charge faced by Prime Minister Theresa May.
However, in research covering a dozen different scenarios, Bruegel found that the UK would end up facing an average sum of €35.7bn.
Just one of the options analysed predicted a final bill of close to €60bn, which excluded any reference to a rebate on payments already made by ministers.
Read More: Britain could face a £50bn Brexit bill
It has been mooted that the UK could pay up to €60bn when finalising divorce terms with the EU - European commission chief negotiator Michel Barnier indicated in last year that the UK faced the sizable charge on quitting the EU.
It comes after May repeatedly refused to answer questions on whether Britain would be prepared to settle a £50bn divorce bill as part of a BBC interview on Wednesday night.