Way too generous at £20,000 a year
Why Specifically? Prima facia it seems high but that is first order thinking in my view.
The history of the allowance is that it has gone through several iterations (e.g. inflation linking at one point - we think that's fair for income tax bands don't we?) but historically the UK had generous investment allowances for dividends/capital gains. These have been reduced over the years along with a corresponding increase in the ISA allowance. The State has favoured income taxes (reducing dividend allowances) over capital taxes (ISAs). The environment is investor friendly. The State has rebalanced its incentives and come down on one side of the fence but "tax break" in totality (for incentivising productive investment/individual financial resilience etc.) is not inherently too high.
(All of the following numbers are from Gemini and I have not verified them).
The total tax forgone by the UK treasury is £9.65bn, for the ISA scheme (note this is a rough figure and is subject to market and interest rate risk in any given year).
1.8% of the £530bn Income Taxes collected, 47% of the total CGT take (£20bn) and 0.78% of Total UK Gov receipts £1.23 trillion.
All for 2025/26.
Secondly, while a lower allowance may achieve the goal improving individual financial resilience, it fails at it's
primary objective, releasing money into the productive economy. And like income tax payers - you need facilitate the higher earners, meaningfully, in order to actually move the needle.
[
AI] The average ISA contribution is £6866 while the
median contribution is not explicitly reported as a single figure by HM Revenue & Customs (HMRC), but data shows that more than
40% of subscribers contribute less than
£2,500 annually, suggesting the median is likely within or near that lower bracket.
Key Contribution Trends
- High Earners vs. Low Earners: Contribution size correlates heavily with income. Approximately 60% of those earning over £150,000 contribute the maximum £20,000, compared to only a small fraction of lower earners.
- The "Max-Out" Group: Around 2.5 million people (out of roughly 15 million active subscribers) utilized their full £20,000 allowance in the 2022/2023 tax year.
The volume of actual cash released into the economy is highly skewed i.e. dependent on high earners participating in the scheme.
- It's a use it or lose it allowance - unused investments can't be carried over
- Once you take it out, you can't put it back in again.
Simplicity from a public administration point of view I would argue.