Quick Summary
- Cash ISA annual limit drops from £20,000 to £12,000 on 6 April 2027 — an £8,000 per year reduction in how much you can shelter in cash tax-free
- The overall ISA allowance stays at £20,000 — the £8,000 difference must go into a Stocks & Shares ISA, Innovative Finance ISA, or Lifetime ISA from 2027/28 onwards
- 2026/27 is the last year you can put a full £20,000 into Cash ISA — ISA allowances never carry forward, so anything unused by 5 April 2027 is gone permanently
- Use our free calculator — the Scottish Income Tax Calculator shows your exact marginal rate, so you can see precisely how much each pound of ISA shelter is saving you
From 6 April 2027, the government is cutting how much of your annual ISA allowance can sit in cash. The window to shelter a full £20,000 in a Cash ISA closes on 5 April 2027 — and it won't reopen.
Quick Answer: From April 2027, the Cash ISA annual subscription limit falls from £20,000 to £12,000. The total ISA allowance remains at £20,000 — the £8,000 gap must go into other ISA types. Scottish Higher-rate taxpayers (42% on income above £43,663) have a Personal Savings Allowance of just £500, meaning interest above that threshold on non-ISA savings costs 40p in tax for every pound. The 2026/27 tax year — ending 5 April 2027 — is the last chance to use the full £20,000 Cash ISA allowance. Act before that deadline.
Contents
- What's changing and why
- Why this matters more for Scottish taxpayers
- What to do before April 2027
- The carry-forward myth
- Where does the £8,000 go after April 2027?
- Who this doesn't affect
- Scotland vs England: no difference here
- Frequently Asked Questions
What's changing and why
The government confirmed in the Spring 2026 Budget that the Cash ISA annual subscription limit will be reduced from £20,000 to £12,000 with effect from 6 April 2027. The stated rationale: encouraging more retail investors to put money into equities rather than holding it in cash — which supports UK capital markets and, in theory, generates better long-term returns for savers.
The critical point is that the total ISA allowance is not changing. You will still be able to put £20,000 per year into ISAs in 2027/28. What changes is how much of that £20,000 can go into a Cash ISA specifically.
ISA limits: 2026/27 vs 2027/28
| ISA type | 2026/27 limit | 2027/28 limit | Change |
|---|---|---|---|
| Cash ISA | £20,000 | £12,000 | -£8,000 |
| Stocks & Shares ISA | £20,000 | £20,000 | No change |
| Innovative Finance ISA | £20,000 | £20,000 | No change |
| Lifetime ISA | £4,000 (within the £20,000 total) | £4,000 (within the £20,000 total) | No change |
| Junior ISA | £9,000 (separate limit) | £9,000 (separate limit) | No change |
| Total ISA allowance | £20,000 | £20,000 | No change |
Source: HM Treasury, Spring 2026 Budget. Limits apply across all ISAs of each type combined.
⚠️ Deadline: The 2026/27 Cash ISA allowance is £20,000 — but only until 5 April 2027. After that date, it drops permanently to £12,000 per year.
Why this matters more for Scottish taxpayers
ISA rules are UK-wide, but the value of Cash ISA sheltering is higher for Scottish taxpayers — because the Personal Savings Allowance works differently here.
The Personal Savings Allowance: smaller in Scotland for Higher-rate taxpayers
The Personal Savings Allowance (PSA) is how much interest you can earn on non-ISA savings without paying tax. The size of your PSA depends on your income tax band:
| Tax band | Scotland PSA | England PSA |
|---|---|---|
| Starter / Basic rate (19–20%) | £1,000 | £1,000 |
| Intermediate rate (21%) | £1,000 | N/A (band doesn't exist in England) |
| Higher rate (42%) | £500 | £500 |
| Advanced rate (45%) | £0 | N/A |
| Top rate (48%) | £0 | N/A |
| English Additional rate (45%) | N/A | £0 |
Scotland's Higher rate kicks in at £43,663 — more than £6,600 lower than the English Higher rate threshold of £50,270. That means Scottish taxpayers move into the £500 PSA band earlier than their English counterparts.
For Scottish Advanced-rate (45%) and Top-rate (48%) taxpayers, the PSA disappears entirely. Every pound of interest from non-ISA savings is taxed.
What this costs in real money
Example: Scottish Higher-rate taxpayer with £50,000 in a savings account at 4%
- Annual interest: £2,000
- Personal Savings Allowance: £500
- Taxable interest: £1,500
- Tax at savings basic rate (40%): £600 per year
If that £50,000 were in a Cash ISA:
- Annual interest: £2,000
- Tax: £0
- Annual saving: £600
A Basic-rate taxpayer with the same amount would only pay tax on the £1,000 above their larger PSA — £400 taxed at 20% = £80. For them, the Cash ISA saves £80. For the Scottish Higher-rate taxpayer, it saves £600. That's why ISA sheltering matters more at Scottish rates.
Example: Scottish Advanced-rate taxpayer with £30,000 in savings at 4%
- Annual interest: £1,200
- PSA: £0
- Tax at 45%: £540 per year
- In a Cash ISA: £0 tax
Try it yourself
Find your exact marginal rate to see how much ISA sheltering saves you per year on savings interest.
Open Scottish Income Tax CalculatorNo sign-up required.
What to do before April 2027
Time is the resource you can't get back here. The 2026/27 allowance disappears permanently on 5 April 2027.
1. Max your Cash ISA before 5 April 2027
Up to £20,000 can go into a Cash ISA between now and 5 April 2027. If you have savings sitting in a taxable account — and you won't need to access that money in a way that conflicts with ISA rules — moving it into a Cash ISA before the deadline locks in the full shelter.
You can hold multiple Cash ISAs at different providers (a rule change from April 2024). What matters is that your total Cash ISA contributions across all providers don't exceed £20,000 in 2026/27.
2. Choose the right type of Cash ISA
| ISA type | Access | Typical rate | Best for |
|---|---|---|---|
| Easy access Cash ISA | Anytime | 4.0–4.7% | Emergency funds, flexible savings |
| Fixed-rate Cash ISA | Locked in for 1–5 years | 4.2–5.0% | Money you won't need for a defined period |
| Notice Cash ISA | 30–120 days' notice | 4.3–4.8% | Slightly better rates, some flexibility |
If you're confident you won't need the money for a year or more, a fixed-rate Cash ISA typically pays a higher rate. If flexibility matters, stick to easy access.
3. Don't close old ISAs — transfer them
If you have old ISAs from previous years sitting at poor rates, you do not need to close them and reopen new ones. Use an ISA transfer — this preserves the accumulated tax-free shield. Closing an ISA and withdrawing the money counts against your current-year allowance if you redeposit it.
💡 Money-saving tip: An ISA transfer moves money between providers without using any of your current-year allowance. Most providers handle the transfer paperwork. Never withdraw and redeposit unless you've checked the impact on your allowance first.
4. Plan for 2027/28: what happens to the £8,000?
From April 2027, you can only put £12,000 into Cash ISA. If you currently max out your Cash ISA at £20,000, you'll need to decide what to do with the remaining £8,000:
- Stocks & Shares ISA — same total ISA tax protection, higher potential return, market risk
- Innovative Finance ISA — peer-to-peer lending, higher interest potential, higher credit risk
- Lifetime ISA — only if you're under 40 and saving for a first home under £450,000; 25% government bonus (up to £1,000/year) within the £4,000 annual sublimit
- Taxable savings account — no shelter; PSA applies, then interest is taxed at your marginal rate
For most people, the Stocks & Shares ISA is the natural home for the extra £8,000 — the tax shelter is the same, only the underlying asset changes.
5. Junior ISA: separate limit, unaffected
If you save for a child, the Junior ISA allowance is £9,000 per year and is a completely separate limit from the adult ISA allowance. The Cash ISA cut does not affect Junior ISAs.
The honest take
The government's stated reason for this change — pushing savers into equities — is at least partly self-interested. UK equity markets benefit from retail investment. But the underlying point isn't wrong: holding large amounts of cash long-term, even in an ISA, has historically underperformed a simple global index fund over a decade or more. For Scottish taxpayers with the 42% rate kicking in earlier than England, the ISA shelter itself is valuable regardless of what sits inside it. The question after April 2027 is simply whether the £8,000 goes into a Stocks & Shares ISA, or into a taxable account where you'll lose a slice of the returns to HMRC every year.
The carry-forward myth
This needs saying clearly, because it catches people out every year.
ISA allowances do not carry forward.
If you don't use your £20,000 Cash ISA allowance in 2026/27, it disappears on 5 April 2027. You cannot roll it into 2027/28. You cannot add an extra £8,000 to the 2027/28 limit to compensate.
The 2026/27 tax year is the last chance to put a full £20,000 into a Cash ISA. That is a fact with a hard deadline.
⚠️ No rollover: Unused ISA allowance from any previous year is lost permanently. The £20,000 limit for 2026/27 ends on 5 April 2027 — any amount not contributed by that date cannot be reclaimed in future years.
This applies even if you had the money available and just didn't get around to it. There are no extensions and no exceptions.
Where does the £8,000 go after April 2027?
From 6 April 2027, the structure changes. The total £20,000 ISA allowance works like this:
- Up to £12,000 in Cash ISA
- The remaining £8,000 (or up to £20,000 if you skip cash entirely) in Stocks & Shares ISA, Innovative Finance ISA, or LISA (within the £4,000 LISA sublimit)
For Scottish savers who currently use the full £20,000 in Cash ISA, there are a few realistic paths:
Path 1: £12,000 Cash ISA + £8,000 Stocks & Shares ISA The full £20,000 remains sheltered. You accept some market risk on the £8,000. A globally diversified index fund is a common choice for the S&S ISA portion.
Path 2: £12,000 Cash ISA + £4,000 LISA + £4,000 Stocks & Shares ISA Only if you're under 40, buying your first home under £450,000. The LISA 25% bonus (£1,000/year) is significant — this path is worth considering if you qualify.
Path 3: £12,000 Cash ISA + taxable savings account for the £8,000 Simple, but you lose the tax protection on the £8,000. Scottish Higher-rate taxpayers earning 4.5% on £8,000 (£360/year interest) would pay 40% tax on any amount above their remaining PSA. That's a meaningful ongoing cost.
For Scottish Higher-rate and above taxpayers, leaving the £8,000 in a taxable account is the least efficient option. The existing comparison between Cash ISA and Stocks & Shares ISA covers the tax protection across both ISA types in more detail.
Try it yourself
See your exact marginal rate on savings interest — and calculate how much the Cash ISA cut will cost you if you move to a taxable account.
Open Scottish Income Tax CalculatorNo sign-up required.
Who this doesn't affect
Not everyone needs to act. The Cash ISA limit cut is irrelevant if:
- You save less than £12,000 a year in Cash ISA. The new limit doesn't constrain you — you were already below it.
- You already split your ISA allowance across multiple types. If your Cash ISA contributions are currently under £12,000 within a mixed ISA strategy, nothing changes.
- You're a Starter or Basic-rate taxpayer with a small savings balance. If your savings interest is well within your £1,000 PSA, the immediate tax cost of being outside an ISA is low — though the ISA shelter is still free insurance worth having.
Scotland vs England: no difference here
ISAs are reserved to Westminster. The Scottish Government has no powers over ISA limits, ISA types, or the annual allowance. The Cash ISA limit cut applies identically to all UK residents — Scottish savers in Glasgow, Aberdeen, or Inverness face exactly the same rules as savers in Manchester or Bristol.
The Scotland-specific element is purely about tax rates: Scottish higher earners lose their PSA earlier and pay more marginal tax on savings interest, which makes the ISA shelter proportionally more valuable north of the border. But the rules themselves are uniform across the UK.
Frequently Asked Questions
When exactly does the £12,000 Cash ISA limit take effect?
The reduced limit applies from 6 April 2027 — the start of the 2027/28 tax year. The 2026/27 tax year ends on 5 April 2027 and is the last year in which you can contribute up to £20,000 to a Cash ISA. After that date, the limit is £12,000 per year.
Does the overall ISA allowance change?
No. The total ISA allowance remains £20,000 per person per year in both 2026/27 and 2027/28. Only the Cash ISA sub-limit changes, from £20,000 to £12,000. The remaining £8,000 of the overall allowance can be used in a Stocks & Shares ISA, Innovative Finance ISA, or Lifetime ISA (up to its own £4,000 cap).
Can I have multiple Cash ISAs?
Yes. Since 6 April 2024, you can open and contribute to more than one Cash ISA in the same tax year, with more than one provider. What you cannot do is exceed the Cash ISA limit in total across all your Cash ISA accounts — £20,000 in 2026/27, dropping to £12,000 from 6 April 2027.
What if I've already put £20,000 into a Cash ISA this tax year?
Nothing changes for 2026/27. If you have already contributed £20,000 to a Cash ISA before 5 April 2027, you have used your full 2026/27 allowance and that money sits in the ISA permanently. The cut only affects contributions from 6 April 2027 onwards.
Does the Scottish Government have any power over ISAs?
No. ISAs are a reserved matter under the Scotland Act — they are set and regulated by Westminster and HMRC. ISA rules are identical for all UK residents regardless of where they live. The Scottish Government cannot increase or decrease the ISA allowance, change ISA types, or introduce Scotland-specific ISA rules.
Related Articles
- Cash ISA vs Stocks and Shares ISA for Scottish Savers 2026/27 — how to split your allowance across ISA types at Scottish tax rates
- Best Stocks and Shares ISA for Scottish Taxpayers — where to put the £8,000 that can no longer go into a Cash ISA
- Personal Savings Allowance Scotland — how the PSA works at every Scottish rate band
- Tax-Efficient Investing Scotland — ISA, pension, and beyond for Scottish investors
- Lifetime ISA and Scottish Property Purchase — using the LISA's 25% bonus for a first home in Scotland
This article is for informational purposes only and does not constitute financial, tax, or legal advice. Tax rates and thresholds can change — always verify current rates with Revenue Scotland, HMRC, or mygov.scot, and speak to a qualified financial adviser for advice specific to your circumstances.
Sources
- Individual Savings Accounts (ISAs) — HMRC / GOV.UK, 2026/27
- ISA limits and subscription rules — HMRC ISA Manager Guidance, 2026/27
- HM Treasury: Spring 2026 Budget — ISA reform — HM Treasury, 2026
- Personal Savings Allowance — HMRC / GOV.UK, 2026/27
- Scottish income tax rates 2026/27 — Scottish Government, 2026/27
- MoneySCOT calculations — moneyscot.co.uk