The UK government has announced a reduction in the annual subscription limit for cash Individual Savings Accounts (ISAs) to £12,000 for individuals under 65, effective from April 6, 2027.

UK · 2026-09-17

1. Step 1 · The triggerthe UK government reduces the annual cash ISA subscription limit for under-65s to £12,000 from April 2027, lowering the amount savers can shelter tax-free in cash.
2. Step 2 · Knock-onUK banks and building societies see a reduction in cheap, sticky retail deposit inflows, increasing their funding costs and pressuring net interest margins.
3. Step 3 · Reaches youbanks may pass higher funding costs onto SME borrowers through higher loan and overdraft rates, directly impacting SME financing costs.

The trigger is reported by the source below. The steps that follow are Branch²’s traced reasoning — how the shock could reach a business like yours, not a prediction.

Source: HM Revenue & Customs

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