The firm has launched one, two and three year cash Isas. The one year fixed rate Isa offers pay 3.05 per cent per annum with the two and three year offerings returning 3.6 and 4 per cent respectively.
The Isas have a minimum opening balance of £3,600 and there is an option to withdraw funds during the fixed term, subject to loss of interest.
Aldermore head of savings Simon Healy says: ““Our fixed rate cash Isa s are offering some of the best tax-free savings rates currently available. They not only enable investors to lock-in their returns but, if they are transferring funds from other providers, they can do so without losing their tax-free status.”