About Plain Investing

Plain Investing started as a way to explain investing properly to a friend who wanted to get started but felt like every article assumed either total ignorance or existing expertise, with nothing connecting the two.

Instead of a pile of disconnected articles, Plain Investing is built as a path: start with what a stocks and shares ISA actually is, and by the end you understand diversification, asset allocation, and how to think about rebalancing a portfolio. Each guide assumes you have read what came before it in the path — though every guide also stands alone if you land on it directly from a search.

How we write

Guides are written for UK readers and checked against official sources such as GOV.UK and MoneyHelper. We update ISA and tax figures when the tax year changes. Last reviewed August 2026. We do not take payment to recommend a platform or fund.

What this site is not

This is general education, not personalised financial advice, and it is not a substitute for a regulated financial adviser for anything genuinely complex or high-stakes. Investing involves risk, including the risk of losing money — nothing here should be read as a recommendation to buy any specific investment.