For existing Help to Buy ISA holders: calculate your 25% government bonus and total deposit at first-home purchase.
Enter your current balance
Type the current balance excluding interest — the bonus is calculated on contributions only. Minimum £1,600 to trigger any bonus; maximum eligible balance is £12,000.
Add your monthly contribution
Enter how much you are paying in each month (£0 to £200). Most savers max out at £200/month after the £1,200 opening deposit.
Pick a target completion date
Choose when you expect to buy. Bonus must be claimed by 1 December 2030, and you cannot keep contributing past 30 November 2029.
Select London or rest of UK
Property cap is £250,000 outside London, £450,000 inside Greater London. The cap applies to the agreed purchase price, not the valuation.
Read the projected bonus
See projected balance at completion, the 25% bonus (capped at £3,000), and total deposit available. Joint buyers can each claim their own bonus on the same property.
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Disclaimer: All results are estimates for guidance only and do not constitute financial, tax or legal advice. Always consult a qualified professional.