Moving Junior ISA money into a Lifetime ISA

A Junior ISA cannot be transferred into a Lifetime ISA. Junior ISA money can only be moved into another Junior ISA, and a Lifetime ISA can only receive transfers from another Lifetime ISA¹. So the money sitting in a Junior ISA on an 18th birthday does not slide across into a Lifetime ISA, however much the two products look like they belong together.

What happens instead is that the Junior ISA automatically turns into an adult ISA when the child turns 18, and the young person decides what to do with it². If they want Lifetime ISA money, they open a Lifetime ISA and pay into it as a new subscription, within the £4,000 a year limit that qualifies for the 25% government bonus³. That is a payment, not a transfer, and it is capped.

The distinction matters because a Junior ISA can build up a substantial balance over the years. Anything above the annual limit cannot be moved into a Lifetime ISA in the same tax year, and money left in the adult ISA does not attract the Lifetime ISA bonus.

A Junior ISA cannot transfer directly into a Lifetime ISA

The rule is set out plainly in ISA guidance: you can only transfer from a Lifetime ISA into another Lifetime ISA, and from a Junior ISA into another Junior ISA¹. Junior ISAs can be moved between providers, and between a cash Junior ISA and a stocks and shares Junior ISA, but they cannot be moved into another type of ISA at all⁸. Another provider's guidance puts it the same way: Junior ISAs can only be transferred into other Junior ISAs⁹.

There is a second restriction that catches people out. Partial transfers within the same tax year, which many adult ISA holders use to split money between providers, do not apply to Junior ISAs or Lifetime ISAs¹⁰. So the usual trick of moving part of a pot across does not exist here either.

Lifetime ISAs are also not flexible ISAs. Junior ISAs and Lifetime ISAs are not flexible, which means money taken out cannot be put back without using up allowance again¹¹. Some providers go further and refuse certain transfers outright: one building society states on its product page that it does not accept transfers from a Lifetime ISA².

The practical result is that a Junior ISA and a Lifetime ISA are separate pots with separate rules. Money crosses between them only if the saver withdraws it and pays it in again, and then only within the Lifetime ISA's own annual limit.

What happens to Junior ISA money at 18

A child cannot touch Junior ISA money before turning 18⁶. On the 18th birthday the account does not pay out automatically in most cases: it turns into an adult ISA, and the individual then decides what to do with the money¹².

Providers handle the mechanics differently. NS&I, for example, ends the Junior ISA on the child's 18th birthday and automatically transfers the money into an adult cash ISA from NS&I, writing to the customer about a month beforehand¹³. Its key document says the same: when the young person is 18, the Junior ISA is transferred into an adult cash ISA from NS&I¹⁴. Other providers describe the money as being given to the child once they turn 18¹⁵.

Control shifts earlier than access. A parent or guardian manages a Junior ISA while the child is under 16, and from 16 the child can choose to manage their own account¹². At 16 or older they can become the registered contact for their Junior ISAs².

That gap is worth planning around. A Junior ISA can hold cash and investments at the same time, which many children's accounts cannot¹⁶. If the money is invested, the 18th birthday is also the point at which investment decisions become the young person's own.

Paying it into a Lifetime ISA: the £4,000 limit and 25% bonus

A Lifetime ISA can be opened by anyone aged 18 or over but under 40⁵. Guidance aimed at savers puts the window slightly differently: you must be between 18 and 39 to open one, though you can carry on saving until you are 50¹⁶. The maximum contribution is £4,000 per tax year⁶.

That £4,000 attracts a 25% government bonus, worth up to £1,000 a year⁴. Several providers describe the same structure: a 25% government bonus on contributions up to £4,000 per year³, an annual payment limit of £4,000¹⁷, and a maximum deposit limit of £4,000 per tax year with a 25% bonus on top¹⁸. One provider frames it as "up to £4,000 into one lifetime ISA"¹⁹.

For someone arriving with a Junior ISA, the arithmetic is the constraint. A pot of £20,000 cannot become Lifetime ISA money in one move. Only £4,000 can go in during the current tax year, and the rest has to wait for future tax years, or stay in the adult ISA. The bonus is paid on what is contributed, not on what the saver happens to hold.

Using the money for a first home: £450,000 cap and 12-month rule

Lifetime ISA savings can go towards a first home, and the property must cost £450,000 or less⁶. The same cap appears across official sources: the money can only be used to purchase a house up to £450,000²⁰, the property price cap of £450,000 supports most first-time buyers across the UK²¹, and Lifetime ISA funds can be put toward a deposit for a home worth a maximum of £450,000 in all areas of the UK²². Independent guidance states the maximum house purchase price is limited to £450,000²³.

The cap is the same everywhere in the UK, which matters more in some regions than others. It is a flat figure rather than one that varies by nation or by local house prices.

Two people buying together can combine their Lifetime ISAs, so long as the property price is less than £450,000²⁴. That does not raise the cap; it just means two bonuses can go towards one purchase.

There are exclusions on who can lend. Savings cannot be used to buy a home if the buyer is getting a private mortgage from a relative, including a parent, grandparent, child, grandchild or sibling, someone married to or in a civil partnership with a relative, a spouse or civil partner, a relative of a spouse or civil partner, or someone married to or in a civil partnership with a relative of a spouse or civil partner⁶. A family loan at below market rates therefore rules the purchase out of the Lifetime ISA route.

The Lifetime ISA is designed for house purchase, retirement saving, or both together²⁵. It is not a single-purpose product, and the money does not have to be spent on a home.

The 25% withdrawal charge and when it applies

Take money out of a Lifetime ISA before 60 for anything other than a qualifying first home and a 25% charge applies⁶. The charge is levied on the amount withdrawn, so a saver gets back less than they put in once the bonus is clawed back⁶.

The charge applies to the whole pot if the entire balance is withdrawn, and it is calculated on the total including the government bonus⁶. It also applies if the Lifetime ISA is transferred to another type of ISA before age 60⁶. For a partial withdrawal, the saver has to take out more than they need in order to cover both the amount required and the 25% charge⁶.

Independent guidance describes the same penalty for withdrawals made for purposes other than retirement or a first home²⁷. One parliamentary committee report puts the effective cost differently, describing Lifetime ISA money as accessible before age 60 "albeit, currently, with a 6.25% penalty"²⁸, which reflects the net effect on the saver's own money rather than the headline rate on the withdrawal. The two figures describe the same charge from different angles: 25% of the amount withdrawn, which works out as a smaller share of the original balance once the bonus is included.

There is no requirement to close a Lifetime ISA after buying a house²¹. The account can stay open, and the money can be taken out from age 60⁶.

Lifetime ISA being replaced: what it means for new savers

The Lifetime ISA is being replaced. A new savings product solely for first-time buyers is planned for April 2028, under changes announced by the government²⁷. The government has confirmed that the new First Time Buyer ISA will be offered in place of the Lifetime ISA⁷.

For anyone holding or considering a Lifetime ISA now, the transitional position is the important part. It will remain possible to open a Lifetime ISA until the new product becomes available, and account holders can continue to save into their Lifetime ISA in line with the existing rules indefinitely⁷. Independent guidance notes that the Lifetime ISA's future is in doubt, with the government planning to consult on scrapping them and replacing them with a new first time buyers' ISA¹².

The Lifetime ISA launched in April 2017²⁹, and the government has referred to its introduction in 2017 when discussing the scheme²¹. A consultation on the implementation of the new product was published on 23 June 2026⁷.

Lifetime ISA or pension: what the rules say about the trade-off

The Financial Conduct Authority's rules for firms selling Lifetime ISAs require them to warn clients about one specific risk. If a client saves in a lifetime ISA instead of enrolling in or contributing to a qualifying scheme, occupational pension scheme or personal pension scheme, they may lose the benefit of employer contributions, and their entitlement to means-tested benefits may be affected²⁵. The same objectives are set out in the scheme rules: house purchase and saving for retirement, either in the alternative or in combination²⁶.

That warning is the clearest official statement of what a Lifetime ISA is not. It is not a workplace pension, and it does not come with an employer contribution. For someone leaving education with a Junior ISA and starting a first job, the two routes behave differently: the Lifetime ISA gives a 25% bonus on up to £4,000 a year, while a workplace pension may bring an employer contribution on top of tax relief.

The Help to Buy ISA sits alongside the Lifetime ISA in the same family of products. Both offer a 25% government top-up on savings³⁰. Money can be transferred from a Help to Buy ISA into a Lifetime ISA, but transferring from a Lifetime ISA to a Help to Buy ISA triggers the 25% withdrawal charge⁶.

Universal Credit and other means-tested benefits

A Lifetime ISA counts as capital for Universal Credit. As with other savings and investment products, it counts towards the calculation of Universal Credit²¹. There is one adjustment: if the claimant is under 60 and holds a Lifetime ISA, 25% of it can be ignored, to cover the withdrawal of the government bonus²⁸.

That 25% disregard exists because the bonus is not really the saver's money until the conditions are met. Without it, a claimant would be assessed on a balance that includes a bonus they cannot access without paying a charge.

Universal Credit replaced a set of legacy benefits including Income Support²⁹. Anyone moving from those benefits to Universal Credit should expect their Lifetime ISA to be assessed under the capital rules, with the 25% disregard applied where it is due²⁸.

Where to get help

MoneyHelper offers free, impartial guidance on ISAs, savings and retirement. The Financial Ombudsman Service can look at complaints about an ISA provider if the firm has not resolved them. For debt and benefit questions, charities including Turn2us provide free information on how capital is treated.

If a Junior ISA has been lost or a provider has changed hands, the provider or the ISA manager list held by HMRC is the starting point. For anyone unsure whether a Lifetime ISA or a pension suits their circumstances, regulated advice is the route, and the FCA's rules require firms to set out the pension trade-off before a Lifetime ISA is opened²⁵.