Swansea Building Society Junior ISA Review

One of the best-paying Junior ISAs, from Swansea Building Society. It ranks 2nd of 30 Junior ISAs we track.

Variable rate

4.00%AER

Protection

FSCS£120,000

Min balance

£1

Max balance

£9,000

Access

Locked until 18

Interest paid

Annually

Transfers in

Accepted

How It Stacks Up

Ranks 2nd of 30

Junior ISAs we track

Among the best
This account 4.00%
UK CPI (Aug 2026)
3.10%
Pays 0.90% more
Average Junior ISA
3.29%
Pays 0.71% more
Best Junior ISA
4.15%
Pays 0.15% less

Inflation: ONS. Averages and best rates: accounts on DepositScout.

Compare Junior ISAs

Pros and cons

  • Pro: New and existing savers
  • Con: The money is locked in until the child turns 18

Good to Know

For UK-resident children under 18 without a Child Trust Fund (or born on or after 3 January 2011); applicant must have parental responsibility or be the child aged 16+. New applicants: the child must live in Wales; existing members anywhere in the UK can also apply. At 18 it moves into an adult Swansea ISA unless they choose otherwise.

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See all Swansea Building Society accounts

Estimated returns with Swansea Building Society's Junior ISA

What you could earn with Swansea Building Society's Junior ISA.

Estimated interest

£1,000 saved

£40.00

At 4% AER

£5,000 saved

£200

At 4% AER

£9,000 saved

£360

At 4% AER

Estimated over one year, if the rate stays the same and interest is left in. Amounts outside the account's minimum or maximum aren't shown.

2 alternatives to Swansea Building Society's Junior ISA

Same type of account, closest on rate.

Common questions about the Junior ISA

D

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