Depositing into your ISA before the tax year ends
The limit on how much you can deposit into ISAs for the 2025/2026 tax year is £20,000.
To make sure your deposit counts towards your 2025/2026 ISA allowance, you need to deposit the money by 11:59 PM UK time on 5 April 2026. Any deposits made after this will count towards the 2026/2027 ISA allowance instead.
Everything you need to know
Deposits must be made before the deadline to count towards this tax year’s allowance
Stocks & Shares ISA deposits may take 1–2 working days to process, but will count as long as you make the deposit before the deadline
Cash ISA deposits count immediately towards this tax year’s allowance
What happens after the deadline?
From 12:00 AM UK time on 6 April 2026, deposits will automatically count towards the new tax year’s ISA allowance.
The annual ISA allowance resets at the start of each tax year. Any unused allowance won’t carry over.
If you need personalised advice, you can check official guidance on the government website.
Was this article helpful?
Related articles
- What is a Stocks and Shares ISA?
- What is a General Investment Account (GIA)
- Choosing between a Stocks and Shares ISA and a General Investment Account (GIA)
- Can I transfer a GIA?
- Can I have both a Cash ISA and a Stocks and Shares ISA?
- We've partnered with Seccl and BlackRock to power Investments
- What’s the difference between a Regular Pot, a Savings Pot, and an Investment Account?
- Monzo Investment Fees
- Are investment accounts protected?
- Why can't I see Monzo Investments?
- Where can I get advice about my investments?
- What is the minimum amount I can invest?
- Can I invest in more than one fund in my investment account?
- What is a contract note?
- Should I save or invest?
- Are Monzo Investments available on Joint Accounts?
- How to open an investments account
- Can I change the fund/risk level of my investment account?
- Are investment accounts sustainably invested?
