A Lifetime ISA can give a first-time buyer a useful boost towards a house deposit, but the bonus comes with rules that are stricter than ordinary savings accounts. Used correctly, it adds 25% to eligible contributions. Used at the wrong time or for an ineligible purchase, it can trigger a withdrawal charge that takes back more than the government bonus. Understanding the details before you exchange contracts can prevent an expensive surprise.
How the Lifetime ISA bonus works
You can pay up to £4,000 into a Lifetime ISA in each tax year until you reach 50. The government adds a 25% bonus, so contributing the full £4,000 can earn up to £1,000. The £4,000 LISA allowance forms part of the wider annual ISA allowance, which is £20,000 for the 2026/27 tax year.
For example, £4,000 of contributions plus a £1,000 bonus gives you £5,000 before interest or investment movement. If two eligible first-time buyers each do the same, they could have £10,000 between their LISAs. These LISA bonus rules make the account one of the most distinctive first home savings account UK options.
The conditions for using a Lifetime ISA for a house deposit
To make a charge-free withdrawal for a first home, the property must cost £450,000 or less, be in the UK, and become your main residence. You must also be buying with a mortgage rather than using the LISA for a buy-to-let purchase.
You must be a first-time buyer for Lifetime ISA purposes, meaning you must not already be, or previously have been, a residential property owner. If you are buying with someone who has owned a home before, that does not automatically stop you using your own LISA, provided you personally meet the rules. The other buyer can only use a LISA for the purchase if they also qualify.
The £450,000 property price limit is nationwide
The LISA property price limit is £450,000 or less across the UK. It does not rise for London or other expensive areas. A purchase at £450,001 would not meet the charge-free house-purchase condition, so buyers close to the cap should check the agreed price carefully before relying on their LISA balance.
Shared ownership needs similar care. HMRC guidance applies the £450,000 test to the full sale value of the property rather than simply the price of the initial share being purchased.
The 12-month rule starts with your first payment
You can normally use the account for a qualifying home purchase only when at least 12 months have passed since your first payment into the Lifetime ISA. The timing is tied to that first contribution, not just the date you completed an application. A practical tip is to make an initial payment promptly after opening an account if a LISA suits your plans, because that starts the qualifying clock.
How the money reaches your solicitor or conveyancer
For a qualifying purchase, you do not withdraw the money to your own bank account. Your Lifetime ISA provider pays the requested amount directly to the eligible solicitor or conveyancer handling the transaction. You provide the required investor declaration, and your conveyancer supplies information to the LISA provider so the funds can be released.
Build this into the conveyancing timetable. HMRC guidance says the provider should pay the funds within 30 days after receiving the required information and declaration. The purchase is expected to complete within 90 days of the conveyancer receiving the money. If completion is delayed but the purchase is still progressing, the conveyancer can request extensions under the LISA rules.
What the 25% withdrawal charge really costs
The withdrawal charge is 25%, but it is applied to the total amount taken out, including the government bonus. That means a non-qualifying withdrawal can leave you with less than you originally paid in.
Suppose you contribute £4,000 and receive a £1,000 bonus, giving you £5,000 before any growth. A 25% charge is £1,250, leaving £3,750. You have lost the £1,000 bonus plus £250 of your original savings. Ignoring investment movement, that extra £250 is 6.25% of the £4,000 you contributed.
Charge-free withdrawals are generally available for a qualifying first-home purchase, from age 60, or in specified terminal-illness circumstances. If the home is over the price cap or your account has not met the 12-month rule, check your options before requesting a withdrawal.
Common mistakes to avoid
One common mistake is assuming the 25% bonus makes every first-home purchase eligible. Check the property price, your ownership history, the 12-month timing rule and your mortgage arrangements before treating the LISA as available deposit money. Buyers using family finance should be particularly careful because connected-person mortgage rules can affect eligibility.
Keep other buying costs separate where possible. Legal fees, surveys and moving expenses arise alongside the deposit, while a charge-free LISA house-purchase withdrawal must go towards the purchase price. A separate cash buffer can reduce the risk of needing a non-qualifying withdrawal later.
Frequently asked questions
Can I use a Lifetime ISA if I am buying with someone who already owns a home?
Yes, potentially. You can use your own LISA if you personally meet the first-time-buyer and other qualifying conditions. A co-buyer who is not a first-time buyer cannot use a LISA under the first-home withdrawal rules.
Can both buyers use a Lifetime ISA for the same property?
Yes. If both buyers have LISAs and each independently meets the qualifying conditions, both can use their savings and government bonuses towards the same purchase.
Can I withdraw my LISA myself and then pay the solicitor?
No. For a charge-free first-home withdrawal, the provider pays the funds directly to the eligible solicitor or conveyancer. Withdrawing the money yourself can trigger the withdrawal charge.
What happens if the purchase falls through?
The conveyancer should return the withdrawn amount to the LISA provider if the purchase does not complete within the permitted period. The money can then be restored to a Lifetime ISA. If the full amount is not returned, a withdrawal charge may apply to the shortfall.
Using a Lifetime ISA with fewer surprises
A Lifetime ISA can strengthen a house deposit because the 25% government bonus is valuable, but only when the purchase fits the rules. The key checks are the £450,000 price ceiling, first-time-buyer status, the 12-month waiting period, a qualifying mortgage and direct payment to your conveyancer. Confirm those points early, especially before committing to a property near the price limit, and the account can work as intended rather than becoming a last-minute complication.