Banks have already improved defences against scams, but a report from industry body Stop Scams UK and the Royal United Services Institute on Thursday said complex guidelines and processes around privacy law make it difficult for companies to share data to stop fraud.
Banks hope the bill will include clearer guidance on allowing them to share anonymised customer data - or data that does not identify the individual if refers to - to spot new types of scams more quickly.
"If we are to unlock data sharing at scale, we call for proportionate and sensible changes to guidance around the interpretation of privacy law," said Ruth Evans, chair of Stop Scams UK, whose members include HSBC, Lloyds, NatWest, Barclays, TalkTalk, Meta and Google.
Last month, more banks jointed Stop Scams UK's fraud-reporting hotline as the cost of living crisis is leading to an increase in the number of financial scams.
However, banks demanding more certainty over sharing anonymised data face opposition from privacy groups.