Santander Junior ISA Review2.70% AER (Sep 2026)

Junior ISA from Santander

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Protection

FSCS

Up to £120,000

Min balance

£1

Max balance

£9,000

Access

Locked until 18

Interest paid

Annually

Transfers in

Accepted

Who Is This For

Learn more about Santander

New and existing savers
Savers happy with a £9,000 cap

Additional Info

Must be opened in branch only; the child must be a UK resident under 18. If the child already holds a Child Trust Fund or cash Junior ISA, it must be transferred in full at the point of opening.

Please verify all details with the provider – for more info read our Disclaimer

Estimated returns with Santander's Junior ISA

Want to know how much interest you will receive with Santander's Junior ISA?

Estimated interest

£1,000 saved

£27.00

At 2.7% AER

£5,000 saved

£135

At 2.7% AER

£9,000 saved

£243

At 2.7% AER

Estimated over one year, assuming the rate stays the same and interest stays in the account. Amounts outside this account's minimum or maximum balance are left out.

Our Expert Opinion on Santander Junior ISA

This account suits parents, grandparents, or anyone wanting to build a tax-free pot for a child over the long term, and the 2.70% rate is decent for a cash Junior ISA with no minimum opening amount worth worrying about. Interest is calculated daily and paid each March, which is a nice touch for tracking growth. The hard catch is that the money is completely locked away until the child turns 18, with early closure only permitted in cases of death or a terminal illness claim accepted by HMRC, so this is genuinely long-term money. If Santander is not your preference, the alternatives list shows Lloyds Bank, Halifax, and Bank of Scotland all offering their own Junior Cash ISAs, though at 2.35%.
Jan Watermann (Co-Founder)DepositScout