ISA Allowance 2026/27 — £20,000 Limit, ISA Types & Transfer Rules

An Individual Savings Account (ISA) is a tax wrapper that shelters qualifying savings and investments from UK income tax and capital gains tax. For the 2026/27 tax year the annual allowance is £20,000, and it can be split across a Cash ISA, Stocks & Shares ISA, Innovative Finance ISA and Lifetime ISA, subject to the Lifetime ISA cap of £4,000. Children have a separate £9,000 Junior ISA allowance. Work out how much your savings could grow with the ISA Calculator→, and compare the wrapper against a taxable account with the Salary Calculator→ perspective on your wider finances.

The appeal is tax-free treatment inside the wrapper: interest, dividends and investment gains are not declared as UK taxable income or gains. Standard ISA withdrawals are tax-free, but Lifetime ISA withdrawals outside the permitted events normally face a 25% charge. From 6 April 2024 you can generally subscribe to multiple ISAs of the same type in one tax year, subject to the overall allowance and specific exceptions.

The ISA Allowance at a Glance

The £20,000 is a cap on new money in, not on the balance — money already inside an ISA keeps growing tax-free year after year, and transfers between providers never touch the allowance. A saver who used £10,000 in April can still add £10,000 more before 5 April 2027, and anything unused simply expires at the year end: ISA allowances cannot be carried forward.

Cash ISA vs Stocks & Shares ISA

The Cash ISA is commonly used for short-term savings and emergency funds, with interest paid gross and not taxed as the account holder's taxable interest. Provider rates change, so this guide does not treat any particular rate as a current entitlement. Cash deposits may have FSCS protection within the applicable limits and banking-group rules. The Stocks & Shares ISA is built for long-term investing: dividends and capital gains inside the ISA are not taxed, so the Personal Savings, dividend and CGT allowances are not needed for those ISA returns. The right split depends on risk, access and time horizon.

The Innovative Finance ISA

The Innovative Finance ISA (IFISA) wraps peer-to-peer lending and crowdfunding debentures inside the tax-free wrapper. Interest and returns are paid tax-free, which can look attractive against Cash ISA rates, but the risk profile is completely different: P2P loans can default, the platform itself can fail, and the FSCS protection that covers cash deposits up to £85,000 does not apply. IFISA returns are not guaranteed, and the investments are typically locked for fixed terms with no easy exit. For most savers the IFISA deserves only a small slice of the £20,000 allowance, held after the Cash ISA emergency fund and Stocks & Shares ISA core are in place.

The Lifetime ISA Within the Allowance

A Lifetime ISA takes up to £4,000 of your £20,000 allowance each year and adds a 25% government bonus — up to £1,000 a year. You must make your first payment before age 40 and can contribute until age 50. The money can be used for an eligible first home costing no more than £450,000 or withdrawn without charge from age 60. For a first-home withdrawal, GOV.UK also requires the first payment to have been made at least 12 months earlier and the purchase to use a mortgage and conveyancer or solicitor. Unauthorised withdrawals before 60 normally face a 25% charge. Because the LISA contribution counts within the £20,000, a saver maxing the LISA has £16,000 left for other adult ISAs in the same year.

Junior ISA Allowance

An eligible child under 18 can hold a Junior ISA with a £9,000 allowance, independent of the adult £20,000. GOV.UK's conditions include the child's UK residence, subject to limited Crown-servant exceptions, and the rule that a child cannot hold a Junior ISA as well as a Child Trust Fund. A parent or guardian with parental responsibility can open and manage it; the child can take control at 16 and cannot normally withdraw the money until 18. The £9,000 can go into cash or stocks and shares, and the parent's own ISA usage does not reduce it.

Transfer Rules and Flexibility

• Formal transfers do not count against the allowance — moving a £50,000 ISA between providers through the provider transfer process uses none of your £20,000.
• Same-type transfers preserve the wrapper — but withdrawing cash and re-depositing into a different provider counts as new subscription, so always use the formal transfer process.
• Flexible ISAs let you withdraw and replace money within the same tax year without losing the allowance — check your provider's flexibility terms before relying on it.
• LISA transfers require the formal transfer process; an unauthorised withdrawal or transfer out of a LISA before 60 normally triggers the 25% charge.

From 6 April 2024 you can generally subscribe to multiple ISAs of the same type in the same tax year, subject to the overall limit and exceptions for products such as LISAs and Junior ISAs.

How Much Tax Do ISAs Really Save?

Example: Maya invests £20,000 a year in a Stocks & Shares ISA at 6% growth for 20 years. Inside the ISA the entire balance compounds tax-free, ending at roughly £735,000 with no UK tax on the ISA income or gains. In a general investment account, dividends above the £500 allowance are taxed at the applicable 2026/27 dividend rates of 10.75% to 39.35%, and gains above the £3,000 CGT allowance at 18% or 24% on sale. The exact tax drag depends on the portfolio and timing, so this is an illustration rather than a forecast.

Common ISA Mistakes

• Leaving the allowance unused — it expires on 5 April; even a modest monthly standing order beats a year-end scramble.
• Transferring by withdrawal — cash withdrawn and re-deposited uses fresh allowance; formal transfers do not.
• Exceeding the LISA cap — paying more than £4,000 into a LISA in one year is not permitted and the excess must be corrected.
• Ignoring flexibility terms — a non-flexible ISA treats replaced withdrawals as new subscriptions.
• Holding cash in a Stocks & Shares ISA — it still counts against the allowance; keep cash needs in a Cash ISA.

Action Plan for 2026/27

The best ISA strategy is boring and repeatable: fill the Cash ISA with six months of essential spending, put long-term savings in a Stocks & Shares ISA with regular monthly contributions, use the Lifetime ISA for the government bonus if you are under 40 and saving for a home or retirement, and keep the Innovative Finance ISA for a small, understood slice of risk. Review the split every April when the new allowance resets, and remember that unused allowance disappears — a standing order that starts on 6 April beats a lump sum you never quite get around to.

Frequently Asked Questions

A yearly ISA check that catches common errors

At the start of the tax year, list the accounts you actually hold and the purpose of each one. At the end of each month, record new subscriptions from bank statements rather than relying on memory. Keep transfers in a separate column because a formal transfer is not the same event as a new contribution. Where a provider describes a transfer as “in specie”, confirm what is being moved and whether the receiving account can hold the same investment.

Before using a Lifetime ISA, check the age and first-home or retirement conditions and the effect of an unauthorised withdrawal. Before using an Innovative Finance ISA, understand that tax-free treatment does not make peer-to-peer or other underlying investments risk-free. Before using a Stocks and Shares ISA, review charges, dealing costs and the time horizon. For short-term money, an investment wrapper can still expose you to a fall in value.

If you move abroad, tell the provider and check the rules in the new country. UK ISA treatment does not guarantee exemption under another country's tax law. Do not make new subscriptions while non-resident unless the current rules and your circumstances clearly permit them. Keep the date of departure, provider correspondence and tax advice with the annual ISA record.

Choosing an ISA without treating the allowance as a recommendation

The allowance is a limit, not a reason to invest cash that you may need soon. Start with emergency savings, expensive debt, planned spending and the risk that you can tolerate. A Cash ISA may suit money that must remain stable, while a Stocks and Shares ISA exposes the balance to investment losses and fees. The wrapper removes UK tax on qualifying ISA income and gains; it does not remove investment risk, provider risk, charges or the possibility that an asset is unsuitable.

Before opening or transferring an account, check the provider's current product terms. Confirm whether the account is flexible, which subscriptions are accepted, whether transfers are partial or full, and how long a transfer may take. Keep confirmation of the transfer request. Withdrawing money and paying it into another ISA can create a new-subscription problem even where the investor intended only to change providers.

Keep an allowance ledger from 6 April to 5 April. Record each subscription, formal transfer, withdrawal and replacement, and reconcile it with provider statements. If more than one provider is involved, ask them to correct an over-subscription through the current HMRC process rather than assuming the error will disappear at year end. A Junior ISA or Lifetime ISA has separate eligibility and withdrawal rules, so do not combine balances merely because all are described as ISAs.

Official sources

• Individual Savings Accounts (ISAs)
• ISA allowance
• Transfer an ISA

Plan your contributions with the ISA Calculator→, then read the Lifetime ISA 2026/27 guide, the Help to Buy ISA guide and the Savings Interest Tax guide for the taxable alternative.

Official sources

• GOV.UK: Individual Savings Accounts
• GOV.UK: How ISAs work
• GOV.UK: Transferring your ISA
• GOV.UK: Junior Individual Savings Accounts
• GOV.UK: Lifetime ISA withdrawals
• GOV.UK: Budget 2025 rates and allowances
• GOV.UK: Limits on how much you can save in an ISA

These GOV.UK pages are the official references for ISA types, transfers, limits, Junior ISAs and Lifetime ISA withdrawals. Check the current allowance and provider transfer process before contributing or moving investments.