The best Help to Buy ISA in the market today is Barclays Bank offering 2.58% AER and 2.55% gross. The bank offers Help to Buy ISA with an immediate term and variable rate interest. Barclays offers no minimum monthly deposit and £200 maximum monthly deposit with interest compounded and paid monthly. Opening an account is at a minimum of £1. In terms of opening an account, the bank allows you to open through the internet, phone and branch. Operation of the account is through the internet and mobile phone app. Although, withdrawals are unlimited and there are no penalties. Therefore, with all these terms, Barclays being the bank with the top rates among other banks, it’s considered as the best Help to Buy ISA today. Barclays also has the top rates among most building societies.