A Stocks and Shares ISA remains one of the most powerful wealth-building tools available to UK investors, allowing money to grow free of income tax and capital gains tax.
Even a single year’s maximum ISA contribution of £20,000 can make a remarkable difference to long-term financial outcomes, especially when invested early enough to benefit from compounding.
A 35-year-old investing the full £20,000 ISA allowance today and leaving it untouched until age 67 could see that sum grow to approximately £234,742, assuming an average annual growth rate of 8%.
That level of return is considered achievable through a balanced spread of leading FTSE 100 and FTSE 250 shares, though as with any investment, no outcome is guaranteed.
If that portfolio generated a 5% dividend yield at age 67, the resulting passive income stream would amount to around £11,737 a year, without touching the underlying capital.
The journey to that point will not be smooth, with some years delivering strong gains and others bringing losses, while dividend payments can also rise and fall depending on market conditions.
One FTSE 100 income share drawing attention from investors is banking and wealth management group Investec (LSE: INVP), which has delivered share price growth of 130% over five years, with dividends on top.
Investec’s adjusted operating profit rose 3.4% to £951m in its 2026 financial year, with first-half 2027 profits expected to land in the range of £479.2m to £496.2m.
The group’s return on tangible equity looks healthy, sitting in the 14.8% to 15.8% range, supported by strong cash generation across its wealth management and specialist banking operations.
Investec currently offers a trailing dividend yield of around 5.88%, alongside a price-to-earnings ratio of just 7.77, which many analysts would consider attractive value for a business of its size.
The group carries a dual listing in London and Johannesburg, with roughly half its profits generated from South Africa, introducing meaningful currency risk alongside its UK operations.
Additional risks include the possibility of a weaker economy increasing credit losses, as well as the threat of windfall taxes on banks or changes to Bank of England reserve interest payments squeezing profits.
Despite these risks, Investec represents a less familiar but potentially rewarding option for investors seeking dividend income within a diversified ISA portfolio.
The core principle remains consistent: starting early, staying invested, and diversifying across quality shares gives any lump sum the best possible chance of growing into a meaningful income stream.
