Notice ISAs deliver top rates without locking away cash as Aldermore leads at 4.3%

Savers seeking higher returns without fully tying up deposits are turning to notice and limited-access cash ISAs, where recent offers pay above 4% while preserving a degree of liquidity.

Aldermore Bank is offering a notice cash ISA paying 4.3% that requires 60 days' notice to withdraw, and Paragon Bank has a 4.15% notice ISA with a 40-day notice period. Both accounts allow money to be taken out and replaced within the same tax year without the replacement counting toward the £20,000 annual cash ISA subscription limit, in line with ISA rules. Providers also permit immediate access to funds without serving notice, but that access typically carries a charge that reduces the effective rate.

In Aldermore's offer, taking money out immediately triggers a charge equivalent to 60 days' interest, which reduces the applied rate on withdrawn sums to about 3.6%. Paragon's 40-day immediate-withdrawal charge reduces the rate on those sums to roughly 3.7%. Those penalty mechanics mean savers can secure headline rates while retaining the option to access cash in an emergency, albeit at a lower effective return for the withdrawn portion.

Notice ISAs sit between fixed-term bonds, which lock funds for a set period, and standard easy-access ISAs, which generally permit unrestricted withdrawals but typically pay lower rates. Many easy-access ISAs currently pay under 4%, prompting savers to consider a mix of accounts to balance yield and access. Financial commentators say running notice ISAs alongside easy-access cash can create a laddered access strategy, allowing some cash to earn higher notice rates while keeping an accessible buffer.

There are other limited-access options that pay comparable rates. Vida Savings' Defined Access ISA 3 pays 4.11% and allows up to four withdrawals a year. Aldermore's Double Access Issue 3 offers 4.2% with two permitted withdrawals. On the high street, Coventry Building Society's "5 Access ISA" offers 4.15% with up to five withdrawals annually. Each product has different rules on replacement, withdrawal frequency and penalty mechanics, which affect the effective return and flexibility.

ISA regulations permit replacing money withdrawn from an ISA within the same tax year without the replacement counting against that tax year’s subscription limit, provided the product's terms allow it. That feature can be useful for savers who want to move funds temporarily to take advantage of a promotional rate and then restore balances before the tax year ends.

Rates and product terms are subject to change and vary by provider. The offers cited were current in September 2025. Consumers should check providers' websites for up-to-date rates, notice periods, withdrawal penalties and any eligibility conditions before moving funds.