The new rate will be available from the 14th March and will pay the new rate to both new and existing customers.
Helen Bierton, Head of Savings at Santander, said:
“Santander is really pleased to increase our support for customers saving towards their most important purchase by offering a market-leading rate to help first time buyers in the UK onto the property ladder. Our new Help to Buy ISA offers the opportunity to build a tax-free savings pot and then benefit from a boost to those savings with the government bonus.”