Last updated: 10 June 2026
By Stiv · Design, technology and personal finance
This post covered the 2025/26 ISA allowance deadline of 5 April 2026, which has now passed. The information below applied to that tax year.
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CoolCuration is not authorised by the Financial Conduct Authority. This article is for informational purposes only and does not constitute financial or investment advice. Investing involves risk and you can lose money. Tax rules can change and their effects vary based on individual circumstances. Always do your own research or speak to a qualified financial adviser before making decisions about your money.
Capital at risk. The value of investments can go down as well as up and you may get back less than you invested. Past performance is not a reliable indicator of future results.
The ISA allowance deadline falls on 5 April every year, and once it passes, any unused portion of your £20,000 tax-free allowance is gone for good. Whether you are looking at a Stocks and Shares ISA, a Cash ISA, or a personal pension, the clock is ticking on the 2025/26 tax year.
This year, there are extra reasons to pay attention. Dividend tax rates are rising from 6 April 2026, and the Cash ISA allowance is being cut from 2027. Here is how to make the most of your allowance before the reset.
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