Last updated: April 2026 · Sourced from official UK government publications
Rules and figures drawn from HMRC and gov.uk official ISA guidance. Not financial advice, see disclaimer below.
The short answer is yes, but with important caveats. If you already have a Help to Buy ISA and are thinking about opening a LISA, or vice versa, this guide explains what the rules actually allow, how the ISA allowance splits across types, and what transferring between them looks like.
Yes. The Lifetime ISA is a separate ISA category from the Help to Buy ISA, which HMRC treated as a cash ISA variant. Holding both simultaneously does not breach the one-ISA-per-type rule. If you already have a Help to Buy ISA, you can open a LISA alongside it provided you are aged 18 to 39 and have never previously owned a home.
The Help to Buy ISA closed to new applicants in November 2019. Existing holders can continue paying in until November 2029. If you have one, you can keep using it alongside a LISA without breaching any rules, because the LISA is a separate category (Lifetime ISA), holding both simultaneously does not break the one-per-type rule.
The £20,000 annual ISA allowance is shared across all types. The LISA has a sub-limit of £4,000 per year, which counts toward the £20,000 total. So if you put £4,000 into a LISA, you have £16,000 remaining to spread across any other ISA types that year.
| ISA Type | Annual Limit | Notes |
|---|---|---|
| Cash ISA | £20,000 (shared) | Shared with all other ISA types |
| Stocks & Shares ISA | £20,000 (shared) | Shared with all other ISA types |
| Lifetime ISA | £4,000 | Sub-limit within the £20,000 allowance |
| Help to Buy ISA | £200/month | Closed to new applicants November 2019 |
Yes, you can transfer a Help to Buy ISA into a LISA in a single one-time transfer. The transferred amount does not count against your £4,000 annual LISA contribution limit, it uses a separate transfer mechanism. However, by transferring you give up any entitlement to the Help to Buy bonus, which cannot be reclaimed afterwards. The transfer is irreversible.
Once transferred, the balance sits inside the LISA and earns the 25% government bonus going forward. You do not receive a retroactive bonus on your Help to Buy funds, only new contributions and growth within the LISA attract the LISA bonus. The transfer cannot be reversed.
There is an important trade-off to consider. The Help to Buy bonus (up to £3,000) was only payable at the point of property purchase. If you have not yet claimed it and you transfer your balance to a LISA, you give up the Help to Buy bonus entirely and move to the LISA bonus structure instead. Before transferring, weigh up which bonus path is more valuable for your situation.
No. All ISA types shelter growth from income tax and capital gains tax, regardless of how many you hold. Interest in a cash ISA, investment returns in a stocks and shares ISA, and the LISA government bonus plus growth are all tax-free. Holding multiple ISA types does not create extra tax complexity, each account is sheltered independently within its own wrapper.
A common strategy for those who opened a Help to Buy ISA before November 2019: keep it running for the government bonus on a property purchase of up to £3,000, while also building a LISA for the larger 25% bonus on amounts up to £4,000 per year. This approach lets you accumulate savings in both wrappers simultaneously.
However, the two bonuses cannot be combined on a single property purchase. At completion, you must choose which account’s bonus to use. You cannot draw on both. This makes the LISA generally the stronger option for larger deposits, while the Help to Buy ISA bonus remains fixed at a maximum of £3,000 regardless of how much you have saved.
Yes. The LISA is a separate ISA category from the Help to Buy ISA, which HMRC treated as a cash ISA variant. Holding both simultaneously does not breach any ISA rules. If you already have a Help to Buy ISA, you can open a LISA alongside it provided you are aged 18 to 39 and have never previously owned a home anywhere in the world.
No. You can only use one government bonus per property purchase. If you hold both a LISA and a Help to Buy ISA, you must choose which account's bonus to apply at the point of purchase. The two bonuses cannot be combined on the same transaction, regardless of how much you have accumulated in each account.
Yes, contributions to both count toward the overall £20,000 annual ISA allowance. The LISA has a sub-limit of £4,000 per year within the £20,000 total. The Help to Buy ISA permits up to £200 per month (£2,400 per year). Both amounts reduce the remaining allowance available for any other ISA types in the same tax year.
Nothing changes automatically. You can keep your Help to Buy ISA open and continue contributing until November 2029 while also paying into a LISA. Alternatively, you can formally transfer the Help to Buy ISA balance into your LISA, but this is a one-time irreversible transfer and you would forfeit any entitlement to the Help to Buy bonus by doing so.
The Help to Buy ISA bonus is paid at property completion only, via your solicitor, it is not available at exchange of contracts and cannot form part of your deposit at that stage. The LISA bonus is paid monthly into your account as you save, meaning it is already part of your balance and available from exchange onwards. This is a practical difference worth factoring into your deposit timeline planning.
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Subscribe free →Not financial advice. This guide explains ISA rules based on current HMRC guidance as of April 2026. It is for information only and does not constitute personal financial advice. Individual circumstances vary, always check gov.uk for the latest ISA rules.