You can withdraw money from your Lifetime ISA (LISA) at any time. If you are under 60 and not using the money to buy your first home, you will pay a 25% government charge on the amount you withdraw. This means you could get back less than you put in.
Different fund managers can process sales at different speeds, and it typically takes around 7 working days overall for all the funds to reach us. Withdrawing for a first house purchase can take up to 10 working days to reach us.
For more details, visit the official government site on LISAs.