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Juno Hunt is a savings comparison service from MFG Management Services Limited (registered in the Isle of Man, company number 135041C; registered office Clarendon House, Victoria Street, Douglas, Isle of Man, IM1 2LN), part of Manx Financial Group. We list savings accounts from UK banks and building societies authorised by the Prudential Regulation Authority, and from NS&I, which is backed by HM Treasury. Manx Financial Group also owns Conister Bank: its accounts are ranked by rate alone like every other bank's and labelled "Our group".

Some banks pay us when you open an account through our link. That payment never changes the order of results. We don't give personal advice, and we never hold your money. Rates can change at any time, so check the details with the bank before you apply.

Juno is our mascot. She finds and ranks rates; she doesn't give advice, and neither do we.

Monzo Instant Access Cash ISA: 3.50% AER | Juno Hunt

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Instant Access Cash ISA

Easy access · Cash ISA · Checked 3 Nov 2026, 12:00

3.50%

AER

Not above inflation: CPI 3.5%, September 2026

What you'd earn

If you put in (£)

You'd earn about £700.00 in 1 year, before any tax.

Worked out from the AER. Variable rates can change.

The conditions in plain English

Access: Instant access: withdraw at any time.
Minimum: £1
Interest paid: Monthly
Manage by: Mobile app
Who can apply: UK resident aged 18+ with a Monzo current account. 'Up to' rate; top rate likely tied to a paid plan.
Where we read it: Monzo's own page, 3 November 2026

Full details

What Monzo's own website says about this account. See it on Monzo's website. The rate at the top of this page is the one Juno checked most recently.

Ways to open: Mobile appFrom Monzo's website, checked 3 November 2026
Ways to manage it: Mobile appFrom Monzo's website, checked 3 November 2026
Minimum age: 18 or overFrom Monzo's website, checked 3 November 2026
Where you must live: UK residentFrom Monzo's website, checked 3 November 2026
Minimum to open: No minimumFrom Monzo's website, checked 3 November 2026
Accepts ISA transfers in: NoFrom Monzo's website, checked 3 November 2026
Flexible ISA: Yes: you can take money out and put it back in the same tax year without using more allowanceFrom Monzo's website, checked 3 November 2026

"Not stated" means neither the bank's Summary Box nor the pages we checked said; it doesn't mean no. The bank's terms and conditions are the full agreement.

Can I open this?

Tick what applies to you to compare it with the conditions the bank states. Nothing you tick leaves this page.

Your age 16 or 17 18 or over

Do you live in the UK? Yes No

Already a Monzo customer? Yes No

How you'd like to open it In the app Online In a branch

Account holders I want a joint account

This compares your answers with the conditions the bank states; it isn't a decision. Monzo decides who can open the account, and runs its own checks when you apply.

Who holds your money

Deposit-taker: Monzo, a trading name of Monzo Bank Limited
Incorporated in: United Kingdom
Regulated: Yes, by the Prudential Regulation Authority and Financial Conduct Authority (FRN 730427)
Protection and disputes: Financial Services Compensation Scheme and Financial Ombudsman Service
Capital: Paid-up capital and reserves of £1,029m at 31 March 2026 (latest published accounts).

Complaints and reviews

Complaints to the bank: Complaints the bank itself reported to the FCA about banking and credit cards, for MONZO BANK LIMITED.67,488 complaints opened (2.39 for every 1,000 accounts); the bank upheld 24.0% of the complaints it closed. October 2025 to March 2026 (source)

These figures cover the whole firm behind Monzo, including current accounts, cards and loans, not just savings. Bigger firms have more customers and so more complaints. Periods differ between sources and are months old when published. They never change our rate order. FCA-format figures contain public sector information licensed under the Open Government Licence v3.0.

FSCS protection

Up to £120,000 per person is protected across everything you hold with Monzo Bank Limited.

Check your total protection

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Rate history

No change since tracking began.

Go to Monzo to apply

You'll apply on Monzo's own website. Monzo may pay us if you open this account; that doesn't affect its position in our results.