Yes, it is definitely worth investing in fractional shares for your ISA, as the stock market generally outperforms Cash ISAs in the long run.
Here are three great reasons to add fractional shares to your ISA
- You can buy lots of different companies with only a small amount of money
- Fractional shares are usually commission-free
- Stocks and shares generally outperform cash savings
Fractional shares allow you to buy a portion of a company’s share rather than the whole share, which makes it easier to invest smaller amounts or diversify across expensive stocks. However, if you switch ISA providers, fractional shares usually cannot be transferred directly. They typically have to be sold and then repurchased with the new provider, although, because this happens within the ISA wrapper, any profits remain tax-free.
Why Fractional Shares Are a Smart Way to Diversify Your Portfolio
Fractional shares are making it easier than ever for investors to build a diversified portfolio, even with relatively small amounts of money. Instead of buying a whole share of a company, investors can purchase a fraction of a share, allowing them to spread their money across more investments rather than concentrating it in just one or two.
This can be particularly useful when investing in expensive companies whose share prices run into the hundreds or even thousands of pounds. Rather than committing a large portion of your portfolio to a single stock, fractional shares allow you to invest smaller amounts in multiple companies across different sectors and markets.
Diversification is one of the most important principles of investing because it helps reduce risk. If one company or sector performs poorly, gains in other parts of the portfolio can help offset those losses. Fractional investing makes this strategy far more accessible, especially for newer investors or those building a portfolio gradually.
They are also useful for regularly investing smaller amounts of money. Many platforms allow investors to set up monthly contributions and automatically allocate funds across several investments using fractional shares.
By lowering the cost barrier to diversification, fractional shares give investors a simple and flexible way to build a balanced portfolio and reduce the risks of putting too much money into a single investment.

Richard is the founder of the Good Money Guide (formerly Good Broker Guide), one of the original investment comparison sites established in 2015. With a career spanning two decades as a broker, he brings extensive expertise and knowledge to the financial landscape.
Having worked as a broker at Investors Intelligence and a multi-asset derivatives broker at MF Global (Man Financial), Richard has acquired substantial experience in the industry. His career began as a private client stockbroker at Walker Crips and Phillip Securities (now King and Shaxson), following internships on the NYMEX oil trading floor in New York and London IPE in 2001 and 2000.
Richard’s contributions and expertise have been recognized by respected publications such as The Sunday Times, BusinessInsider, Yahoo Finance, BusinessNews.org.uk, Master Investor, Wealth Briefing, iNews, and The FT, among many others.
Under Richard’s leadership, the Good Money Guide has evolved into a valuable destination for comprehensive information and expert guidance, specialising in trading, investment, and currency exchange. His commitment to delivering high-quality insights has solidified the Good Money Guide’s standing as a well-respected resource for both customers and industry colleagues.
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