Last reviewed: 30 April 2026 | Sources: HMRC — Individual Savings Accounts (ISAs) | GOV.UK — ISA rules | FCA — ISA provider rules
⚡ TL;DR — Skip to what matters
The annual ISA allowance remains £20,000 for 2026/27. A Stocks and Shares ISA lets you invest this in funds, shares, bonds and other qualifying investments. All capital gains, dividends and interest within the ISA are completely tax-free — and withdrawals are tax-free too. Unused allowance cannot be carried forward to the next tax year. You can hold a Stocks and Shares ISA alongside a Cash ISA and other ISA types in the same tax year, as long as total contributions do not exceed £20,000.
📋 Key Facts at a Glance
- Annual ISA allowance 2026/27: £20,000 (unchanged from 2025/26)
- Tax treatment: all gains, dividends and interest within ISA are tax-free; withdrawals are tax-free
- Unused allowance: cannot be carried forward — use it or lose it each tax year (6 April – 5 April)
- Multiple ISAs: you can contribute to multiple ISA types in the same year (Stocks & Shares + Cash + IFISA) up to the £20,000 total
- What you can hold: UK and international shares, investment funds (OEICs, unit trusts), ETFs, bonds, gilts
- What you cannot hold: residential property, physical gold, collectibles, crypto (in most ISAs)
- Junior ISA (JISA): £9,000 annual allowance per child — separate from adult ISA allowance
- Flexible ISA: some providers allow you to withdraw and replace funds in the same tax year without losing the allowance
- Source: HMRC — Individual Savings Accounts | GOV.UK ISA guidance
Why invest in a Stocks and Shares ISA?
Outside an ISA, investment returns are subject to Capital Gains Tax (CGT) on gains above the annual CGT allowance (£3,000 for 2026/27), Income Tax on dividends above the dividend allowance (£500 for 2026/27), and Income Tax on interest. Inside a Stocks and Shares ISA, none of these taxes apply — ever. The longer you hold investments in an ISA, the greater the compounding tax advantage.
ISA allowance rules
| ISA type | Annual allowance | Notes |
|---|---|---|
| Cash ISA | Up to £20,000 (shared with other ISAs) | Interest paid tax-free |
| Stocks and Shares ISA | Up to £20,000 (shared) | Gains and dividends tax-free |
| Innovative Finance ISA (IFISA) | Up to £20,000 (shared) | Peer-to-peer lending — higher risk |
| Lifetime ISA (LISA) | Up to £4,000 (counts toward £20,000) | 25% government bonus; withdrawal penalties apply unless for first home or retirement |
| Junior ISA (JISA) | £9,000 per child | Completely separate from adult ISA allowance |
Example: you could put £10,000 in a Cash ISA, £8,000 in a Stocks and Shares ISA and £2,000 in an IFISA — total £20,000, all within the rules.
What you can hold in a Stocks and Shares ISA
- UK and international shares: listed on a recognised stock exchange
- Investment funds: OEICs (open-ended investment companies), unit trusts
- Exchange-traded funds (ETFs): including tracker and factor ETFs
- Investment trusts: closed-ended funds listed on the LSE
- Bonds and gilts: UK government and corporate bonds
- Cash: held within the ISA while awaiting investment (interest earned is tax-free)
Choosing a provider
ISA providers must be HMRC-approved. Key factors when choosing:
- Platform charges: annual platform fees (typically 0.15%–0.45% of portfolio value) or flat fees
- Fund charges: annual fund management costs (OCF/TER) — index funds typically 0.05%–0.25%
- Investment range: some platforms offer thousands of funds; others restrict to their own range
- Flexibility: check whether the ISA is flexible (allows withdrawals and replacements within same year)
- FSCS protection: cash held within an ISA is protected up to £85,000 per institution; investments are protected up to £85,000 if the platform fails (not against investment loss)
Frequently asked questions
Can I withdraw money from a Stocks and Shares ISA?
Yes — there is no minimum holding period and withdrawals are completely tax-free. However, with a non-flexible ISA, once you withdraw you cannot put the money back into the same ISA in the same tax year — you lose that portion of your £20,000 allowance. Flexible ISAs allow you to re-deposit withdrawn amounts in the same tax year.
Can I transfer my ISA to a different provider?
Yes — ISA transfers are free and can be done at any time without losing your tax-free status. Always transfer using the official ISA transfer process (not by withdrawing and re-depositing) to preserve the tax wrapper. The new provider handles the transfer process.
Can I have a Stocks and Shares ISA and a workplace pension?
Yes — ISAs and pensions are entirely separate tax wrappers. Contributing to both simultaneously is encouraged, as they serve different purposes: pensions provide tax relief on contributions but restrict access; ISAs provide no upfront relief but allow penalty-free withdrawals at any age.
What happens to my ISA if I die?
Your ISA passes to your estate. A spouse or civil partner can inherit your ISA allowance (the Additional Permitted Subscription — APS) allowing them to subscribe additional funds equivalent to your ISA value into their own ISA. ISA savings are not exempt from Inheritance Tax — they form part of your estate for IHT purposes.
I invested and my Stocks and Shares ISA is now worth less — do I lose any allowance?
No — your ISA allowance is based on contributions, not value. If you contributed £20,000 and the value fell to £15,000, you have used your full £20,000 allowance for the year. You cannot top it up with additional contributions in the same year even though the current value is lower.
Sources & References
- HMRC — Individual Savings Accounts (ISAs): gov.uk/individual-savings-accounts
- GOV.UK — ISA limits: gov.uk/individual-savings-accounts/how-isas-work
- FCA — ISA provider and product rules (COBS)
- HMRC — ISA managers — guidance for managers and investors
- Financial Services Compensation Scheme (FSCS) — ISA protection: fscs.org.uk
Disclaimer: For informational purposes only — not financial advice. Always verify at GOV.UK. More guides: our UK Finance hub.
