Cash vs investments: finding the right balance

The UK tax system has shifted frequently in recent years, and with further changes ahead, deciding whether to hold wealth in cash or invest it has become more complex. In practice, the answer is rarely one or the other. A balanced approach is usually more appropriate, with cash supporting short term needs and investments providing long term growth. The right mix will always depend on individual circumstances.

Cash

Cash is often the natural starting point for those seeking security, as capital values do not fall in nominal terms unless it is spent. However, this stability comes at a cost. When inflation exceeds the interest earned, the real value of savings declines over time, as reflected in rising everyday costs.

A commonly used guideline is to hold between six and twelve months of personal expenditure in cash, along with funds set aside for planned spending within the next one to three years. This provides a financial buffer for unexpected costs, avoiding the need for high interest borrowing. Money needed in the near term is therefore generally best kept in cash, with a focus on achieving competitive rates.

Alongside interest rates, tax is also an important consideration; the Personal Savings Allowance allows £1,000 of interest to be received tax free for basic rate taxpayers and £500 for higher rate taxpayers, while additional rate taxpayers do not benefit from an allowance. Interest above these levels is taxed at marginal rates. For couples, structuring savings to make use of both individuals’ allowances can improve overall efficiency.

From April 2027, marginal tax rates on savings interest are set to rise, further reducing returns from cash holdings.

Cash deposits do benefit from FSCS protection, covering up to £120,000 per person per banking group. At the same time, changes to ISA rules from April 2027 will limit the amount that can be held in Cash ISAs, increasing the importance of considering alternative options.

Investing

Investing offers the potential to achieve returns that outpace inflation over time, helping preserve and grow purchasing power. While markets can fluctuate in the short term, diversified portfolios have historically delivered stronger long term outcomes than cash.

Tax treatment is also a key factor. Dividend income and capital gains are generally taxed at lower rates than savings interest, and both benefit from separate allowances. This can make investing a more tax efficient way to generate returns over time.

A range of investment options is available, with different structures suited to different objectives. Stocks and Shares ISAs remain a cornerstone, allowing investments to grow free of income and capital gains tax within the annual ISA allowance of £20,000 each tax year. Other solutions, such as investment bonds and unwrapped portfolios, may also play a role depending on individual circumstances.

Some structures offer added planning flexibility. For example, investment bonds can be assigned to another individual, enabling the use of their tax allowances. This is commonly seen in intergenerational planning, such as supporting children or grandchildren.

Risk is an essential consideration. Investment portfolios can range from cautious to higher risk strategies, and selecting the right level depends on both tolerance for market fluctuations and capacity for loss. While higher risk investments offer greater long term growth potential, they also come with increased short term volatility.

Help from the experts

There is no single answer to whether cash or investing is better. Both play an important role within a well structured financial plan. Cash provides stability and liquidity, while investments offer the opportunity for long term growth.

Achieving the right balance requires a clear understanding of financial goals, timeframes and risk tolerance, particularly as tax rules continue to evolve. For individuals considering how best to structure their wealth, professional advice can help bring clarity and ensure that capital is working as effectively as possible.

For a confidential discussion about your financial planning needs, please contact us or visit our financial planning pages for further information.