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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.

Market Harborough Building Society Junior ISA: 3.40% AER | Juno Hunt

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Market Harborough Building Society

Junior ISA

Locked until 18 · Cash ISA · Checked by hand 3 November 2026

3.40%

AER

Not above inflation: CPI 3.5%, September 2026

What you'd earn

If you put in (£)

You'd earn about £680.00 in 1 year, before any tax.

Worked out from the AER. Variable rates can change.

Junior ISA rules and other children's accounts

The conditions in plain English

Access: No withdrawals until the child turns 18.
Minimum: £1
Interest paid: Once a year
Manage by: Online, Branch
Who can apply: No extra conditions beyond the bank's standard checks.
Where we read it: Market Harborough Building Society's own page, 3 November 2026. We read this rate from the bank's own page by hand and recheck it at least weekly

Full details

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

Ways to open: Branch and PostFrom Market Harborough Building Society's website, checked 3 November 2026
Ways to manage it: Branch and PostFrom Market Harborough Building Society's website, checked 3 November 2026
Joint accounts: Not allowed: sole names onlyFrom Market Harborough Building Society's website, checked 3 November 2026
Ways to pay in: Electronic payment, Cash and ChequeFrom Market Harborough Building Society's website, checked 3 November 2026
Accepts ISA transfers in: YesFrom Market Harborough Building Society'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 Market Harborough Building Society 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. Market Harborough Building Society decides who can open the account, and runs its own checks when you apply.

Who holds your money

Deposit-taker: Market Harborough Building Society
Incorporated in: United Kingdom
Regulated: Yes, by the Prudential Regulation Authority and Financial Conduct Authority (FRN 206041)
Protection and disputes: Financial Services Compensation Scheme and Financial Ombudsman Service
Capital: Capital and reserves of £62.8m at 31 December 2025 (latest published accounts).

FSCS protection

Up to £120,000 per person is protected across everything you hold with Market Harborough Building Society.

Check your total protection

Email me if this rate changes

Email address

We use your email only for these alerts. Unsubscribe with one click from any email. See our privacy notice.

Rate history

No change since tracking began.

Go to Market Harborough Building Society to apply

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