Pensions & Retirement

Best Cash ISA Rates UK 2026 — Compare Tax-Free Savings Accounts

Compare the best Cash ISA rates in the UK. We review top providers, easy access vs fixed, and help you maximise your tax-free savings.

· 6 min read

Tax-free savings with Cash ISAs — here’s how to find the best rates and make the most of your £20,000 allowance.

Best Cash ISA Rates 2026

Rates change frequently — check provider websites for current rates

Easy Access Cash ISAs

Provider Rate (AER) Access Min Deposit Transfers In
Check current best Variable Instant Varies Check
Check current best Variable Instant Varies Check
Check current best Variable Instant Varies Check

Fixed Rate Cash ISAs

Provider Rate (AER) Term Min Deposit Transfers In
Check current best Fixed 1 year Varies Check
Check current best Fixed 2 year Varies Check
Check current best Fixed 3 year Varies Check

Where to check current rates:

  • MoneySavingExpert
  • Which?
  • Moneyfacts
  • Individual provider websites

Best Cash ISA Providers

Top Providers Compared

Provider Strengths Best ISA Type App
Marcus (Goldman Sachs) Competitive rates Easy access Yes
Chip App-first, automation Easy access Excellent
Moneybox Round-ups, automation Easy access Excellent
Paragon Bank Consistently top rates Fixed Basic
Shawbrook Bank Competitive fixed Fixed Yes
Virgin Money Flexible, reliable Both Yes
Nationwide Loyalty bonuses Both Good

Provider Details

Marcus by Goldman Sachs

Feature Details
ISA type Easy access
Rate Competitive (check current)
Access Online/app
Transfers in Yes
Flexible Yes

Pros:

  • Usually near top of best buy tables
  • Goldman Sachs backing
  • Simple, clean experience
  • Flexible ISA

Cons:

  • Easy access only (no fixed)
  • Online only
  • Rate can drop with market

Best for: Those wanting competitive easy access rate.

Chip

Feature Details
ISA type Easy access
Rate Competitive
Access App-only
Transfers in Yes
Features Auto-save, round-ups

Pros:

  • Great app
  • Auto-save features
  • Helps you save automatically
  • Good rates

Cons:

  • App-only (no web)
  • Savings accounts elsewhere may beat
  • Newer platform

Best for: App users wanting automation.

Moneybox

Feature Details
ISA type Easy access + LISA
Rate Decent
Access App-only
Transfers in Yes
Features Round-ups from spending

Pros:

  • Round-ups save spare change
  • Easy access + Lifetime ISA
  • Good engagement features
  • Nice app

Cons:

  • Rates not always top
  • App-only

Best for: Those needing help to save regularly.

Paragon Bank

Feature Details
ISA type Fixed rate
Rate Often top for fixed
Access Online
Transfers in Yes
Terms 1-5 years

Pros:

  • Consistently top fixed rates
  • FSCS protected
  • Range of terms

Cons:

  • Less known brand
  • Basic interface
  • Fixed only

Best for: Those locking in best fixed rate.

Shawbrook Bank

Feature Details
ISA type Easy access + Fixed
Rate Competitive
Access Online/app
Transfers in Yes

Pros:

  • Good rates on both types
  • FSCS protected
  • Decent app

Cons:

  • Not always tip-top rates
  • Smaller brand

Best for: Balance of rate and flexibility.

Virgin Money

Feature Details
ISA type Both
Rate Good (check current)
Access Online/branches
Transfers in Yes
Flexible Yes

Pros:

  • Established brand
  • Branch access if needed
  • Flexible ISA
  • Range of options

Cons:

  • Rarely top rate
  • App could be better

Best for: Those wanting established brand with flexibility.

Nationwide

Feature Details
ISA type Both
Rate Varies (member bonuses)
Access Online/branches
Transfers in Yes
Special Member rates

Pros:

  • Bonus rates for members
  • Building society values
  • Branch network
  • Range of accounts

Cons:

  • Non-member rates worse
  • Can be confusing

Best for: Existing Nationwide members.

Easy Access vs Fixed Rate

Comparison

Factor Easy Access Fixed Rate
Rate Lower Higher
Access Anytime End of term
Rate risk Can drop Locked in
Best for Emergency fund, flexibility Money you won’t need

Choose Easy Access If

  • You might need the money
  • Building emergency fund
  • Rates expected to rise
  • Unsure how long to save

Choose Fixed If

  • Money you won’t need for X years
  • Rates expected to fall
  • Want guaranteed return
  • Near retirement (certainty)

ISA Allowance Explained

2025/26 Allowance

Limit Amount
Total ISA allowance £20,000
Cash ISA Up to £20,000
Stocks & Shares ISA Up to £20,000
Lifetime ISA Up to £4,000 (counts toward £20k)
Combined limit £20,000 total

Example Allocations

Strategy Cash ISA S&S ISA LISA
All cash £20,000 £0 £0
Balanced £10,000 £10,000 £0
With LISA £6,000 £10,000 £4,000
Max growth £5,000 £15,000 £0

Flexible ISAs

What Flexibility Means

Feature Flexible ISA Non-Flexible ISA
Withdraw £5,000 Can replace in same year Lose that £5k allowance
Example Deposit £10k, withdraw £3k, can add £13k more Deposit £10k, withdraw £3k, can only add £10k more

Flexibility is valuable if you might need temporary access.

Flexible Cash ISA Providers

Provider Flexible?
Marcus ✅ Yes
Virgin Money ✅ Yes
Nationwide ✅ Some accounts
Paragon ❌ No (fixed)
Shawbrook Varies

Always check — flexibility varies by account.

Transferring ISAs

Why Transfer

Reason Benefit
Better rate Higher interest
Better provider Service, app quality
Consolidation Easier management
From old ISAs Modernise savings

How to Transfer

Step Action
1 Find new provider with better rate
2 Check they accept transfers
3 Apply for new ISA and request transfer
4 New provider handles transfer
5 Old ISA closed, funds moved

Never withdraw and redeposit — you lose the ISA tax wrapper.

Transfer Timeline

Type Typical Time
Cash ISA to Cash ISA 15 working days
Stocks ISA to Cash ISA Longer (need to sell)
Old Cash ISA to new 15 working days

Cash ISA vs Regular Savings

When Cash ISA Wins

Situation Why ISA
Higher/additional rate taxpayer PSA only £500/£0
Large savings Interest exceeds PSA
Long-term saving Lock in tax-free status
Uncertain tax position Future-proof

When Regular Savings Win

Situation Why Regular
Basic rate taxpayer £1,000 PSA covers most
Small savings Won’t hit PSA
Need best rate now Non-ISA sometimes higher
Already maxed ISA Use regular savings

Calculation Example

Savings Rate Annual Interest Tax (Basic Rate)
£50,000 5% £2,500 £300 (£2.5k - £1k PSA × 20%)
Same in ISA 4.8% £2,400 £0
Difference ISA saves £100

Building Society vs Bank Cash ISAs

Factor Building Society Bank
Ownership Member-owned Shareholders
Profit motive Members Shareholders
Rates Often competitive Varies
Service Often good Varies
Examples Nationwide, Leeds, Yorkshire Marcus, Virgin, Shawbrook

Both are FSCS protected — choose on rates and service.

Cash ISA Tips

Maximise Returns

Tip Action
Use full allowance £20,000 if possible
Don’t let old ISAs stagnate Transfer to better rate
Compare at renewal (fixed) Rates change
Check flexibility If you might need access
Consider splitting Some fixed, some easy access

Common Mistakes

Mistake Problem
Leaving in old ISAs Earning 0.1%
Closing ISA to withdraw Lose tax wrapper
Not using allowance yearly Doesn’t carry over
Ignoring fixed rates Often 0.5%+ higher
Assuming all flexible Many aren’t

Cash ISA Checklist

When Opening ✓
Check rate is competitive ☐
Check minimum deposit ☐
Confirm transfers accepted ☐
Check if flexible ☐
Understand access restrictions ☐
Confirm FSCS protection ☐
Annual Check ✓
Is rate still competitive? ☐
Should I transfer? ☐
Have I used my allowance? ☐
New tax year — new allowance ☐