- Cash Feels Safe, But Inflation Is Quietly Shrinking Its Value Across Developed Economies
Keeping money entirely in cash has become an increasingly expensive form of financial caution across several developed economies, with inflation eroding purchasing power even where the nominal balance remains untouched, according to new research from British Business Funding.
The September 2026 study compares what 10,000 units of local currency would retain in real purchasing power after five years with an alternative strategy that divides the money equally between bank deposits and domestic equities.
Greece emerges as the country where the gap between the two approaches is largest, although some of the published calculations warrant careful interpretation. The fundamental point behind the study is straightforward: €10,000 kept as non-interest-bearing cash still reads €10,000 on the balance sheet, but it buys less after prices rise.
British Business Funding estimates that cumulative inflation of about 16.00% reduced the real purchasing power of €10,000 in Greece to €8,621 over the five-year period examined. On that measure alone, the cash holder suffered a purchasing-power erosion of approximately €1,379, without losing a single nominal euro.
Spain and Italy show a similar pattern, with the study assigning both an approximately 18.00% five-year inflation rate and estimating that 10,000 euros held in cash retained purchasing power of only €8,475.
Austria fares worse on inflation, with cumulative price growth put at 25.00%, reducing the real value of €10,000 to around €8,000. The result illustrates why describing cash as “risk-free” can be misleading: it may carry little nominal volatility, but it remains exposed to inflation risk.
The same principle applies outside the euro area. British Business Funding estimates that cumulative inflation of about 19.40% left £10,000 of British cash with real purchasing power of roughly £8,065, while US$10,000 in the United States was valued at around US$8,130 after five years.
In both markets, households avoiding investment risk would nevertheless have experienced a meaningful reduction in what their money could purchase.
Where the research becomes more ambitious is in its comparison with a so-called “smart saving” portfolio. Its methodology places half the original 10,000 into a bank deposit earning the country’s stated average deposit rate and invests the other half in the domestic stock market, with dividends reinvested.
British Business Funding then compares the resulting portfolio value with inflation-adjusted cash to estimate what it calls the “cost of playing it safe”.
On the figures supplied, Greece is said to produce the widest gap, with the alternative strategy reaching €16,959 compared with €8,621 of real purchasing power for cash — a difference of €8,338.
Spain follows with a reported alternative portfolio value of €15,428 against €8,475 for cash, while Italy is shown at €14,883 against €8,475. Austria’s comparison places the alternative at €13,195 versus €8,000, while the UK and US are shown at £12,252 and US$12,390 respectively.
Those headline comparisons, however, require an important qualification. The accompanying Greece description says €5,000 was deposited at 1.20% annually while another €5,000 earned a 23.50% five-year stock-market return; taken literally, those inputs would not compound to a combined €16,959 over five years.
A €5,000 deposit compounded at 1.20% annually would reach roughly €5,307, while a €5,000 equity investment earning 23.50% over the entire period would reach about €6,175 approximately €11,482 combined before any further inflation adjustment, not €16,959.
That discrepancy does not invalidate the study’s broader observation that non-interest-bearing cash loses real value during inflation, but it does mean the precise claimed advantage of the alternative portfolio should be treated cautiously unless the underlying spreadsheet clarifies whether the stated equity returns are annualised rather than cumulative, or whether another calculation method has been applied.
Similar scrutiny is warranted across the country rankings because investment-return comparisons are particularly sensitive to compounding assumptions, dividend treatment, tax and the measurement period. For investors, methodology matters as much as the headline result.
The distinction between cash and cash savings is also crucial. Physical cash or money sitting in a zero-interest account loses purchasing power directly to inflation, but an interest-bearing savings account or deposit can offset part of that erosion.
The study itself recognises this by including deposits in its alternative strategy, meaning its conclusion should not be interpreted as evidence that all forms of cash savings are necessarily irrational.
There is also no universally superior portfolio simply because equities generated stronger historical returns. Stocks carry price risk and can fall sharply, particularly over relatively short horizons, while cash offers liquidity, certainty of nominal value and usefulness for emergency expenditure.
A household saving for a deposit on a home next year has a very different risk tolerance from an investor building retirement wealth over several decades.
British Business Funding’s own expert commentary acknowledges that trade-off. “Holding cash feels safe, but it isn’t.
Every year prices go up, and the money sitting at home buys a little less than it did before,” the expert said, before adding that stocks can grow wealth faster but “they drop too, and not everyone is comfortable with that risk.”
The firm points to diversified exchange-traded funds and bonds as alternatives for savers seeking different combinations of return, diversification and volatility.
The most useful lesson from the research may therefore be less dramatic than the ranking suggests. The real financial decision is not between “safe cash” and “smart investing”, but between different risks: inflation risk, market risk, liquidity risk and the possibility of needing money at an inconvenient time.
Holding adequate liquid reserves while investing longer-term money according to risk tolerance can address those competing objectives more effectively than treating either cash or equities as universally superior.
For policymakers and households, inflation’s effect on savings remains the central point. A banknote does not announce that it has lost value, and a bank balance can remain numerically unchanged even as the goods and services it buys become steadily more expensive.
The study’s country rankings may require further clarification of their return calculations, but its underlying warning is difficult to dispute: money that earns nothing in an inflationary world is not standing still in real terms, it is moving backwards.
