Lifetime ISA Changes 2026: 20% Penalty, 2029 Switch, Your Move

That is the short version. The longer version matters more, because this Budget quietly rewrote the rules for two very different groups of women: the 18-to-39-year-olds who already hold a LISA and are watching house prices drift past the cap, and the women in their 40s and 50s who were locked out of the LISA entirely and now get their own account in 2029. Below: what changed, a "does this affect me?" table, the real cost of the old penalty in pounds, and the one finding that surprised us when we ran the numbers.

What changed in the Lifetime ISA on 29 October 2026

Three things changed, and one thing very deliberately did not.

1. The over-cap penalty shrank. HMRC's guidance, updated on 28 October 2026, now says withdrawals made on or after 29 October 2026 for a first home costing more than £450,000 carry a 20% charge. Before, they carried the standard 25%.

2. It is not backdated. HMRC's October 2026 tax-free savings newsletter to ISA providers is explicit: the lower charge applies only to eligible withdrawals made on or after 29 October 2026, and a past withdrawal cannot be put back into a LISA. If you bought above the cap in, say, June, the 25% stands.

3. A replacement is coming. The same newsletter confirms a First Time Buyer ISA from April 2029: up to £4,000 a year, a 25% bonus, a lifetime bonus cap of £20,000 calculated on the final balance, and no withdrawal charge when you buy, because the bonus simply is not paid if you buy above the cap.

What did not change: the £450,000 price cap. It has not moved since the LISA launched in 2017, according to MoneySavingExpert's Budget analysis, and the government kept it for both the LISA and the new account. That frozen number is the whole story behind this change.

Why the old 25% charge was really a fine on your own money

Here is the arithmetic that campaigners have been pointing at for years. You pay in £4,000. The government adds 25%, or £1,000. Your pot is £5,000. A 25% charge on £5,000 is £1,250 – which takes back the £1,000 bonus and £250 of your own savings. In other words, the old penalty did not just cancel the reward; it cost you 6.25% of what you saved.

A 20% charge on the same £5,000 is exactly £1,000. Bonus gone, your money intact. That is the precise fix the Budget made – but only for one situation: buying a first home over the cap.

We ran the numbers: what the old charge would have cost you

Using HMRC's own rules (bonus = 25% of what you pay in; no interest included, to keep it clean), here is what an over-cap home buyer keeps under each charge.

Our calculation. The £15,782 row uses the average LISA house-purchase withdrawal in 2024 to 2025 from HMRC's Annual Savings Statistics 2025. Real pots include interest or growth, which is also charged at the same rate.

The middle row is the one to remember. In 2024 to 2025, HMRC recorded 87,250 LISA withdrawals for a house purchase, averaging £15,782. If one of those buyers had gone over the cap, the old rule would have cost her about £789 of her own money on top of losing the bonus. That is a sofa, a solicitor's bill or a month's rent – gone for buying a flat £1 over a number set nine years ago.

Does this affect me? The decision table

Find your row. This is the part no other explainer we read laid out in one place.

The London problem: the average first-time buyer is now over the cap

This is the bit we think most coverage underplays. The UK House Price Index for August 2026, published by HM Land Registry on 21 October 2026, put the average price paid by first-time buyers in London at £473,000. That is £23,000 above the LISA cap – and that is the average, not the top end.

So for a London saver, the 20% rule is not an edge case. It is quite possibly the rule that will apply to her. The same release put the UK average across all buyers at £273,000 and London's overall average at £554,000, down 2.2% on the year, so outside the capital most first homes still sit comfortably under £450,000.

Our honest read: if you are a London buyer with a LISA, the change turns a punishment into a shrug. If you are buying in Manchester, Leeds or Cardiff, it probably changes nothing – and the bonus remains one of the most generous savings incentives in the UK.

Lifetime ISA vs First Time Buyer ISA: side by side

Sources: GOV.UK Lifetime ISA; HMRC tax-free savings newsletter, October 2026; MoneySavingExpert, 28 Oct 2026 (edited 2 Nov 2026).

The finding that surprised us: paying the bonus at the end costs you nothing

Several commentators – including Quilter, quoted in Financial Reporter – worried that paying the bonus only at purchase means savers lose the interest a monthly bonus would have earned. We tested it. A saver putting £4,000 a year into a LISA for five years at a steady 4% ends with £28,165, because the £1,000 bonus each year compounds too. A saver putting £4,000 a year into an FTB ISA at the same 4% has £22,532 – and a 25% bonus on that final balance brings it to £28,165. Identical, to the penny.

That works because the FTB ISA bonus is calculated on the whole final balance, including growth – a detail the government confirmed after dropping an earlier idea of paying it on contributions only. Where the two really differ is risk: if you invest and markets fall before you buy, an end-of-term bonus shrinks with your pot. And the ceiling differs – the LISA allows up to £1,000 a year for as long as you can pay in before 50; the FTB ISA stops at £20,000 total, which you would hit with an £80,000 balance.

What this means for women in their 40s and 50s

The LISA has always had a hard age wall: make your first payment before 40 or never. That locked out a lot of women whose route to a first home is later – after years of renting, caring, a career break, or separating from a partner whose name was on nothing. The FTB ISA removes that wall. A woman who is 44 in April 2029 and pays in £4,000 a year for five years would have £20,000 of her own money and a £5,000 bonus before any interest, as long as the home is £450,000 or under.

One honest caveat: the FTB ISA is for first-time buyers only, and the detail of who counts as "first-time" will follow the usual HMRC rules. If you have ever owned a home anywhere, even jointly, check before you plan around it.

And if you are 39 now? Martin Lewis's suggestion, reported by MSE, is that some people open a LISA with a small payment before 40 simply to keep the option alive. That is a judgement call that depends on your plans – it is not a rule – and the retirement side of a LISA rarely beats a workplace pension with employer contributions.

Five things to do this month

1. Check your target price against £450,000. If you are buying in London or the South East, run both versions: with the bonus (under the cap) and without it (over the cap, 20% charge).
2. Do not withdraw early "to be safe". Non-home withdrawals before 60 still cost 25%, which still eats into your own money.
3. Tell your conveyancer you have a LISA early. HMRC's process relies on a conveyancer declaration of the property price; the provider then releases funds, which MSE says can take up to 30 days.
4. If you are 18–39 without a LISA, decide before April 2029 whether you want one. After that, the FTB ISA is the only bonus account for new savers.
5. If you are 40+, put April 2029 in your calendar and start building an ordinary savings or cash ISA pot now – the Budget confirmed the £20,000 cash ISA allowance stays, so that route remains open.

For a bigger decision – especially combining a LISA with a mortgage, or a LISA versus pension choice – a regulated financial adviser or the free, government-backed MoneyHelper service can help you weigh it for your own situation.

How this fits the rest of the Budget

The LISA change did not happen in isolation. The planned cut of the cash ISA limit to £12,000, which we covered before the Budget, has since been cancelled. Meanwhile savings income tax rises to 24% for basic-rate payers from April 2027, which makes the tax-free wrapper of any ISA – LISA included – more valuable, not less. And if your deposit is close to ready, our October look at UK mortgage rates and the Bank of England's 5 November decision show what the borrowing side looks like right now.

Quick questions

Is the Lifetime ISA being scrapped?

Not for existing savers. Current holders can keep paying in and using their accounts under the existing rules. New LISAs are expected to stop when the First Time Buyer ISA launches in April 2029.

Can I transfer my Lifetime ISA into the new First Time Buyer ISA?

No. HMRC's October 2026 newsletter says transfers from a LISA into an FTB ISA are not permitted – but you can hold both and use both towards the same purchase.

Does the 20% charge apply if I withdraw for something other than a house?

No. The 20% rate only applies to a first-home purchase above £450,000. Any other unauthorised withdrawal before 60 is still charged at 25%.

Is the £450,000 cap going up?

Not in this Budget. It stays at £450,000 for both the LISA and the new FTB ISA. Groups such as HomeOwners Alliance have called for higher London limits, but nothing has been announced.

Educational content only. Not personalised financial advice.