Cash vs investments: the basics every retiree should know

Not all savings work the same way. Money sitting in a bank account behaves very differently from money invested in the stock market — and the difference can have a substantial impact on how long your savings last in retirement. Understanding the trade-off between the two is one of the most valuable things you can learn before drawing on your pot.

Cash savings. Money in current accounts, savings accounts, and cash ISAs is secure and instantly accessible (capital protected up to £85,000 per institution under the FSCS). The trade-off is growth — interest rates on cash have historically struggled to keep pace with inflation over the long run, meaning the real spending power of cash can quietly erode over time, even though the number on the statement never falls.

Investments. Money in stocks & shares, funds, bonds, or a Stocks & Shares ISA has historically grown faster than cash over long periods — global stock markets have averaged returns somewhere in the region of 6-8% a year over many decades, before fees. The catch is volatility: the value can fall significantly in any given year, sometimes by 20% or more, and there's no guarantee of any particular return. Investing generally rewards patience over a long time horizon, not short-term certainty.

Why the mix matters in retirement. A retirement pot that's 100% cash is very safe but may struggle to keep up with rising prices over a 20-30 year retirement. A pot that's 100% invested may grow faster on average, but a market downturn early in retirement — combined with regular withdrawals — can do lasting damage that's hard to recover from. Most retirees benefit from holding some of both: enough cash to cover a few years of essential spending, with the rest invested for longer-term growth.

Diversification. Within the "investments" side, spreading money across many companies, sectors, and countries — typically via a low-cost fund rather than individual shares — reduces the impact of any single investment performing badly. This is one of the simplest and most widely recommended ways to manage investment risk.

This page is general information, not advice tailored to your circumstances. If you're considering moving money from cash into investments — or rebalancing an existing portfolio — a regulated independent financial adviser can help you think through your risk tolerance, time horizon, and the right mix for your situation.