Best ISA Accounts UK 2026 Cash, Stocks & Lifetime ISAs Compared
The 2025/26 tax year ends 5 April 2026 — after that your £20,000 ISA allowance is gone forever. Cash ISAs now pay up to 4.68% AER and from April 2027 the cash limit drops to £12,000. Here's exactly which ISA wins for your savings goal right now.
Best ISA Accounts UK 2026 — Cash, Stocks & Lifetime ISAs Compared
The 2025/26 tax year ends 5 April 2026 — after that your £20,000 ISA allowance is gone forever. Cash ISAs now pay up to 4.68% AER and from April 2027 the cash limit drops to £12,000. Here's exactly which ISA wins for your savings goal right now.
Best ISA Accounts at a Glance — March 2026
An ISA (Individual Savings Account) is a tax-free wrapper — any interest, dividends, or investment gains inside are never subject to income tax or capital gains tax, no matter how large the pot grows. Every UK resident aged 18 or over receives an annual allowance of £20,000. Unused allowance cannot be carried forward: if you don't invest before 5 April 2026, that year's £20,000 is permanently gone.
Since April 2024 you can open and pay into multiple ISAs of the same type in a single tax year — so you can hold both a cash ISA and a stocks and shares ISA at once, as long as total contributions stay under £20,000.
Best Cash ISAs — March 2026
A cash ISA works identically to a standard savings account, except all interest is permanently tax-free. Rates are currently unusually strong for cash ISAs — easy-access accounts are running ahead of equivalent non-ISA savings rates, making them the obvious choice for most savers right now.
The highest easy-access cash ISA rate in the UK as of late March 2026. The rate includes a 1.08% 12-month promotional bonus for accounts opened via Moneyfactscompare.co.uk by 13 April 2026 — the bonus applies only to deposits made in the current tax year. After 12 months, the rate steps down to the base variable rate, so worth reviewing at renewal. The account is fully flexible, meaning withdrawals can be replaced within the same tax year without eating into your annual allowance.
- Highest easy-access rate on the market right now (March 2026)
- Unlimited penalty-free withdrawals
- Flexible ISA — replace withdrawals without losing allowance
- £1 minimum deposit · FSCS protected up to £120,000
- Promotional rate drops after 12 months — must review
- No phone support · app and web only
Very close behind Trading 212, with a 4.66% AER that includes a generous 2.12% 12-month bonus. Because the bonus is higher than Trading 212's, Plum's base rate is lower — worth factoring in if you're planning to hold beyond 12 months. Unlimited penalty-free withdrawals with no access restrictions. Mobile app only — no desktop management, which may not suit all savers.
- 4.66% AER — second-highest easy-access rate in the UK
- Unlimited withdrawals, no restrictions
- £1 minimum · FSCS protected up to £120,000
- App only — no web or desktop access
- High bonus means base rate falls significantly after 12 months
Best Fixed-Rate Cash ISAs — March 2026
| Term | Provider | Rate (AER) | Min Deposit | Early Exit |
|---|---|---|---|---|
| 18 months | West Brom BS | 4.45% | £1 | Penalty applies |
| 1 year | Hodge Bank | 4.36% | £1,000 | 90-day interest loss |
| 2 year | Chetwood Bank (HL Active Savings) | 4.40% | £1,000 | 180-day interest loss |
| 3 year | West Brom BS / Chetwood Bank | 4.40% | £1 | Penalty applies |
| 5 year | Chetwood Bank (HL Active Savings) | 4.50% | £1,000 | 360-day interest loss |
Rates sourced from Moneyfacts, correct as of 24–26 March 2026. Fixed ISA rates change frequently — always verify before applying.
Best Stocks and Shares ISAs — 2026
A stocks and shares ISA lets you invest in funds, ETFs, shares and bonds — all growth and income shielded from capital gains and income tax. Returns are not guaranteed and investing is recommended for a minimum five-year horizon. Over the long term, the compound effect of tax-free growth is substantial: an ISA millionaire pays £0 tax on the entire pot.
The go-to platform for investors who want to buy a global index fund and leave it alone. Vanguard's 0.15% annual fee is capped at £375, making it extraordinarily cheap for larger portfolios. The limitation — only Vanguard-branded funds, no individual stocks — is a feature for disciplined passive investors and a constraint for those wanting broader choice. The LifeStrategy and FTSE Global All Cap funds are among the most widely recommended in the UK.
- 0.15% annual fee capped at £375 — one of the cheapest platforms in the UK
- £0 fund dealing fees
- Flexible ISA — withdraw and replace without losing allowance
- 90 excellent low-cost passive funds including LifeStrategy range
- Vanguard funds only — no individual stocks or shares in other companies
- £500 minimum lump sum or £100/month
For investors with smaller portfolios or those just starting out, zero-fee platforms maximise the amount working from day one. Trading 212 supports fractional shares (buy a slice of an expensive stock for £1) and has a highly rated mobile app. InvestEngine focuses on ETF portfolios with automated rebalancing tools. Neither offers telephone support, which is the trade-off for £0 cost.
- £0 platform fee and £0 trading fees
- Trading 212 supports fractional shares — invest from £1
- InvestEngine offers automated ETF portfolios
- FSCS protected up to £85,000
- No telephone support
- Trading 212 interface can be overwhelming for first-time investors
The flat monthly fee structure means charges do not grow with your portfolio — making it dramatically cheaper than percentage-based platforms once you hold more than £50,000. The trade-off is that small portfolios pay proportionally more. With over 40,000 investments available and one free trade included per month, it's the most comprehensive platform reviewed here for serious investors.
- Flat fee — charges don't grow as your portfolio grows
- 40,000+ investments including UK and global stocks, funds, ETFs, bonds
- One free trade per month included
- Strong research tools and phone support
- Expensive for small portfolios — percentage fee is cheaper under ~£30–50k
The UK's largest investment platform. HL reduced its headline fund platform fee from 0.45% to 0.35% effective March 2026 — though a £1.95 fund dealing charge was introduced simultaneously. Still pricier than Vanguard for purely passive investors, but justifies this through class-leading research tools, real telephone support, and the widest investment range of any UK platform. Best for investors who value breadth and service over rock-bottom cost.
- Largest investment range of any UK retail ISA platform
- Phone, web, app support — 24/7 availability
- Platform fee reduced from 0.45% to 0.35% (March 2026)
- Excellent research tools and fund shortlists
- More expensive than Vanguard for passive fund investors
- £1.95 fund dealing fee introduced March 2026
Stocks & Shares ISA — Fee Comparison
| Platform | Annual Platform Fee | Fund Deal | Share Deal | Best For |
|---|---|---|---|---|
| Trading 212 | £0 | £0 | £0 | Beginners, small portfolios |
| InvestEngine | £0 (DIY) | £0 | ETFs only | ETF-focused investors |
| Vanguard | 0.15% (cap £375) | £0 | N/A | Passive index investors |
| AJ Bell | 0.25% (ETFs capped £42) | £1.50 | £9.95 | Mid-sized portfolios |
| Hargreaves Lansdown | 0.35% (shares capped £150) | £1.95 | £11.95 | Full service, widest range |
| Interactive Investor | From £4.99/mo flat | £3.99 | £3.99 | Portfolios over £50,000 |
Lifetime ISA (LISA) — 2026
Available to UK residents aged 18 to 39, the Lifetime ISA pays a 25% government bonus on up to £4,000 of contributions per year — a maximum free £1,000 annually. Funds can only be withdrawn tax-free to buy a first home (worth up to £450,000) or from age 60. Withdrawing for any other reason triggers a 25% penalty that claws back the government bonus and a portion of your own savings. The government has signalled plans to reform or replace the LISA from 2026 onwards.
| Provider | Type | Annual Fee | Best For |
|---|---|---|---|
| Moneybox | Cash + S&S | 0.45% + fund costs | Most savers — easy app, cash and investment options |
| Hargreaves Lansdown | Stocks & Shares | 0.35% (capped) | Widest investment choice in a LISA |
| AJ Bell | Stocks & Shares | 0.25% (capped) | Cost-conscious active investors |
Junior ISA (JISA) — 2026
A Junior ISA allows parents or guardians to save or invest up to £9,000 per year tax-free for a child under 18. The money is locked until the child turns 18, when it converts to an adult ISA. Both cash and stocks-and-shares JISAs are available.
| Provider | Type | Fee | Note |
|---|---|---|---|
| Hargreaves Lansdown | S&S JISA | 0.35% (capped £150) | Free to open, widest fund range, phone support |
| Vanguard | S&S JISA | 0.15% (capped £375) | Lowest cost for passive long-term investing |
| Nationwide | Cash JISA | £0 | ~3.5% AER, branch access, simple for cash savers |
Which ISA Is Right for You?
| Your Situation | Best ISA |
|---|---|
| Want tax-free interest, no investment risk | Cash ISA — Trading 212 (4.68%) or Plum (4.66%) |
| Saving over 5+ years for growth | Stocks & Shares ISA — Vanguard or Trading 212 |
| Buying a first home under £450k (under 40) | Lifetime ISA — Moneybox or AJ Bell |
| Large portfolio (£50k+) | Stocks & Shares ISA — Interactive Investor |
| Investing for a child | Junior ISA — Hargreaves Lansdown or Vanguard |
| Higher-rate taxpayer, PSA maxed out | Cash ISA immediately — rate irrelevant if interest would be taxed anyway |
| Want to split across cash and investments | Cash ISA (liquid buffer) + S&S ISA (growth) — allowed since April 2024 |
Key ISA Rules for 2025/26
- Annual allowance: £20,000 across all ISA types combined.
- Multiple ISAs: Since April 2024 you can open and pay into more than one ISA of the same type in the same tax year.
- Tax-year deadline: 5 April 2026 — unused allowance cannot be carried forward.
- Transfers: Never withdraw to transfer. Use the official ISA transfer form so money keeps its tax-free status. Allow up to 15 working days. Some fixed-rate ISAs charge an exit penalty.
- Flexible ISAs: Some providers allow you to withdraw and replace money in the same tax year without using extra allowance — check before withdrawing.
- FSCS protection: Cash ISAs protected up to £120,000. Stocks and shares ISAs protected up to £85,000 against platform failure (not market falls).
- 2027 cash ISA limit: From 6 April 2027, the cash ISA limit falls to £12,000 for savers under 65. The 2025/26 and 2026/27 tax years are the last opportunity to shelter up to £20,000 in cash.
Our Verdict — Best ISA Accounts UK 2026
Frequently Asked Questions
How much can I put in an ISA in 2025/26?
Up to £20,000 across all ISA types combined. You can split it however you like — for example £10,000 in a cash ISA and £10,000 in a stocks and shares ISA. From April 2027 the cash-only limit for under-65s falls to £12,000 within the overall £20,000 allowance.
What is the best cash ISA rate right now?
As of late March 2026, Trading 212 leads the easy-access market at 4.68% AER (includes a 12-month promotional bonus). For fixed rates, West Brom BS pays 4.45% for 18 months and Chetwood Bank via HL Active Savings pays 4.50% for 5 years.
Can I have more than one ISA?
Yes — since April 2024 you can open and pay into multiple ISAs of the same or different types in a single tax year, as long as total contributions don't exceed £20,000.
Is a cash ISA better than a regular savings account?
For most UK savers in 2026 — especially higher-rate taxpayers or those who have used their Personal Savings Allowance — yes. Easy-access ISA rates are currently running higher than equivalent standard savings rates and all interest is tax-free. Basic-rate taxpayers earning under £1,000 in interest annually may not need an ISA immediately, but it offers useful protection if rates or tax brackets change.
How do I transfer an ISA?
Never withdraw and redeposit — the money loses its tax-free status. Fill in a transfer form with your new provider and they handle the process. Transfers must complete within 15 working days. Some fixed-rate ISAs charge an early exit penalty, so check terms before initiating.
Are ISAs protected by the FSCS?
Cash ISAs held with FSCS-authorised UK banks and building societies are protected up to £120,000 per institution. Stocks and shares ISAs are protected up to £85,000 against platform failure — not against investment losses. Market risk always exists in investment accounts.
