ISA Allowance 2026/27 UK — Complete Guide

ISAs let you save and invest tax-free. Here’s how to make the most of your allowance.

ISA Allowance Basics

2026/27 Allowance

ISA Type	Annual Limit
Total ISA allowance	£20,000
Cash ISA	Up to £20,000
Stocks and Shares ISA	Up to £20,000
Innovative Finance ISA	Up to £20,000
Lifetime ISA	£4,000 (within £20,000)

How It Works

Rule	Details
Combined limit	£20,000 total across all types
Can split	Between different ISA types
Use it or lose it	No carry forward
Tax year	6 April to 5 April

Examples

Combination	Valid?
£10,000 Cash + £10,000 S&S	✓ Yes
£4,000 LISA + £16,000 Cash	✓ Yes
£20,000 Cash + £5,000 S&S	✗ Over limit
£15,000 this provider + £5,000 another	✓ Yes

Types of ISA

Cash ISA

Feature	Details
What it is	Tax-free savings account
Contributions	Up to £20,000/year
Interest	Tax-free
Access	Usually instant
Risk	None (FSCS protected)
Best for	Emergency funds, short-term savings

Stocks and Shares ISA

Feature	Details
What it is	Tax-free investment account
Contributions	Up to £20,000/year
Returns	Tax-free (dividends and gains)
Access	Can withdraw (sell investments)
Risk	Investment risk
Best for	Long-term growth (5+ years)

Lifetime ISA (LISA)

Feature	Details
What it is	Savings for home or retirement
Contributions	Up to £4,000/year
Bonus	25% government bonus (up to £1,000)
Age to open	18-39
Age to contribute	Until 50
Withdrawal	First home, 60+, or 25% penalty
Best for	First-time buyers, additional retirement

Innovative Finance ISA

Feature	Details
What it is	Peer-to-peer lending
Contributions	Up to £20,000/year
Returns	Interest from loans
Risk	Higher risk (not FSCS protected)
Best for	Experienced investors seeking income

New Rules (From 2024/25)

Multiple ISAs Allowed

Old Rule	New Rule
One of each type per year	Multiple of same type allowed
Switch providers = transfer only	Can open new and keep old
Limited flexibility	More choice

What This Means

You Can Now	Example
Split Cash ISA	£10k with Santander, £5k with Nationwide
Multiple S&S ISAs	Trading 212 and Vanguard
Shop around	Without transferring

What Hasn’t Changed

Still True	Details
£20,000 total	Across all ISAs
LISA £4,000 limit	Within the £20,000
Use it or lose it	No carry forward
Tax year deadline	5 April

Maximising Your Allowance

Priority Order

Priority	Action
1	Emergency fund (Cash ISA)
2	LISA if eligible (25% bonus!)
3	S&S ISA for long-term
4	Top up as able

Even Small Amounts Help

Strategy	Benefit
£100/month	£1,200/year tax-free forever
Regular contributions	Build habit
Direct debit	Automatic
Don’t wait	Time in market matters

End of Tax Year

If Near 5 April	Consider
Even £1 counts	Better than nothing
Use LISA first	Get the bonus
Don’t miss deadline	Lost forever
Transfer to ISA	From regular savings

Tax Benefits

What’s Tax-Free in ISAs

ISA Type	Tax-Free
Cash ISA	All interest
S&S ISA	Dividends and capital gains
LISA	Interest/growth and bonus
IFISA	Peer-to-peer interest

Compared to Non-ISA

Without ISA	Tax Position
Savings interest	Personal Savings Allowance then taxed
Dividends	£500 allowance then taxed
Capital gains	£3,000 allowance then taxed

Who Benefits Most

Situation	ISA Value
Higher/additional rate taxpayer	Very valuable
Large savings	Exceed PSA
Regular investor	Growing pot, future gains
Long-term saver	Compound tax-free

Withdrawals and Flexibility

Flexible ISAs

Feature	Details
What it is	Replace withdrawals same year
Example	Withdraw £5k, replace £5k, still full allowance
Not all ISAs	Check if yours is flexible
Same tax year	Must replace by 5 April

Non-Flexible ISAs

Rule	Impact
Withdraw £5k	Lose that allowance portion
Put back £5k	Uses £5k of remaining allowance
Choose carefully	When to withdraw

Transferring ISAs

How Transfers Work

Rule	Details
Current year	Can transfer some or all
Previous years	All or none (usually)
Allowance	Not affected by transfer
Provider	Must do the transfer (not you)

Why Transfer

Reason	Benefit
Better rate	Cash ISAs especially
Lower fees	S&S ISAs
Better platform	User experience
Consolidate	Multiple old ISAs

Transfer Tips

Tip	Why
Never withdraw to transfer	Loses ISA status
Use transfer form	Provider handles it
Check timelines	Can take weeks
Check fees	Exit or transfer fees

Junior ISAs

JISA Allowance

Feature	Details
Annual limit	£9,000 (separate from adult)
Types	Cash or Stocks and Shares
Who can open	Parent/guardian for under 18
Who can contribute	Anyone
Access	Child at 18 (becomes adult ISA)

JISA vs Adult ISA

JISA	Adult ISA
£9,000 limit	£20,000 limit
Locked until 18	Accessible anytime
Child’s money	Your money

Summary: ISA Planning Checklist

Know Your Limits

Allowance	Amount
Total ISA	£20,000
LISA (if using)	£4,000
Remaining for others	£20,000 - LISA
JISA (per child)	£9,000

This Tax Year

Action	Done
Check what you’ve used	☐
Plan remaining	☐
Prioritise LISA bonus	☐
Set up contributions	☐
Diary 5 April deadline	☐

Which ISA to Use

Goal	Best ISA
Emergency fund	Cash ISA
First home (if eligible)	Lifetime ISA
Long-term growth	Stocks & Shares ISA
5+ year goals	Stocks & Shares ISA

Key Dates

Date	Significance
6 April	New tax year, fresh allowance
Throughout year	Contribute regularly
Early April	Use any remaining allowance
5 April	Last day to use allowance

Contacts

Provider Type	Examples
Cash ISAs	Banks, building societies
S&S ISAs	Vanguard, Hargreaves Lansdown, ii
LISAs	AJ Bell, Moneybox, Skipton

The ISA allowance is one of the best tax breaks available. Even if you can only save a little, getting it into an ISA protects future growth from tax forever. The best time to start was years ago; the second best time is now.