Around 1.6 million ISA holders used the full £20,000 annual ISA allowance, according to HMRC’s most recent figures, equating to roughly 7% of all ISA holders.
I have put money into an ISA most years since 2000 when they were introduced (I was 45 then) as did my late husband for a few years until his premature death.
For the first seven years, the limit was £3,000, then increased slowly.
It wasn’t until 2015 that the ISA allowance was increased by George Osborne from £5,760 to £15,000, far above the personal tax allowance. In 2018 it was increased to £20,000 where it has remained.
Don’t forget that we’d had a massive financial crash in 2008. Interest rates for savers were on the floor and the stock market took time to recover. Even if someone put a large sum into an ISA they weren’t going to earn much on it. People with savings were withdrawing their funds from cash and shares, jumping on the the buy-to-let bandwagon in droves, pushing up house prices, forcing young people wanting to buy their first home to borrow more so there was a need to attract more liquid investment.
Before 2015, the ISA limit was considerably below the personal tax allowance. So it can be argued that until 2015, ISA subscriptions came from the untaxed element of earnings and pensions.
I retired from paid work in 2021 when I was 66. Since then, I could argue that half of my ISA subs come from my State Pension which is a taxable source of income but below the limit of the personal tax allowance.
I pay tax on occupational pensions, of course, but over the decades that I paid into those pension schemes I received tax relief on those contributions.
So this notion of double taxation doesn’t entirely hold up.
I think the annual ISA allowance should be reduced and a limit placed on how much of a stack can be held tax free.