Yes, in the first calendar month in which you choose to make a deposit, you will have until the end of that same calendar month to pay in up to £1,200. For example, if you open an account with us on 10 February, but make a first payment of £50 on 10 March, you’ll have until 31 March to pay up to the balance of £1,150.
If you are considering taking out a Help to Buy: ISA at the end of the month you may wish to delay until the following month in order to make your maximum deposit.
After this you can pay in up to £200 a month. The maximum monthly limit of £200 will also apply to Help to Buy: ISA's that you transfer from another provider. You can only deposit £1,200 once. You don’t have to save the maximum but if you miss a contribution you can’t make it up the next month.