With a Help to Buy: ISA, the UK Government will give you a bonus worth 25% of what you have saved when you are ready to buy your first home. You need to have saved at least £1,600 to qualify and the maximum savings that can qualify is £12,000. This money goes towards the completion cost of buying your first home.
Please don't withdraw funds before closing your account and allow up to 5 working days for your acount closure and receipt of your Closing Document, which your conveyancer (or solicitor) will need to claim the bonus from the UK Government on your behalf. If you've chosen to receive your document via post, please allow up to 10 working days.
Read the full rules of the Help to Buy: ISA scheme.