What Is Inflation Really?
Inflation is the rate at which money loses purchasing power. When inflation is 5%, £100 today will only buy £95 worth of goods next year. It's not that prices go up — it's that your money becomes worth less.
The Hidden Tax
At 5% inflation, money loses half its purchasing power in just 14 years. That £10,000 emergency fund becomes worth only £5,000 in real terms — even while the number in your account stays the same.
Understanding Real vs Nominal Returns
The interest rate your bank shows is the nominal return. What actually matters is the real return — your interest minus inflation.
Example Scenarios
How Inflation Is Measured
In the UK, two main measures are used:
- CPI (Consumer Price Index): The official measure, used for the Bank of England's 2% target. Excludes housing costs.
- RPI (Retail Price Index): Older measure, usually higher than CPI. Includes mortgage interest payments.
- CPIH: CPI plus owner-occupiers' housing costs. Increasingly used.
Why Keeping Cash Has a Cost
The Erosion Effect
£10,000 in a 0% account with 5% annual inflation:
This doesn't mean you shouldn't hold cash. Emergency funds need to be accessible. But it does mean long-term wealth building requires strategies that outpace inflation.
Strategies to Combat Inflation
1. Maximise Savings Interest
The difference between 0.1% and 5% is enormous. Always shop for the best rates and consider notice accounts for better returns on money you don't need immediately.
2. Consider Index-Linked Savings
Some NS&I products and bonds offer returns linked to inflation, guaranteeing your purchasing power is maintained.
3. Invest for the Long Term
Historically, diversified stock market investments have returned 7–10% annually over long periods, well above inflation. The tradeoff is short-term volatility.
4. Own Assets That Appreciate
- Property: Tends to keep pace with or exceed inflation over time
- Stocks: Companies can raise prices with inflation
- Commodities: Physical goods often rise with inflation
5. Invest in Yourself
Skills and education can lead to higher earnings — the ultimate inflation hedge, your income rises with or faster than costs.
When Inflation Actually Helps
Inflation isn't all bad if you're a borrower with fixed-rate debt:
- Your mortgage payment stays the same while your salary (hopefully) rises
- The real value of your debt decreases over time
- Property values tend to rise, building equity faster
The Right Balance
Keep enough cash for emergencies (3–6 months expenses), even knowing inflation erodes it. The peace of mind and flexibility is worth the cost. For anything beyond that, consider investments that can beat inflation over time.
Action Steps
- Check your current savings rate against current CPI inflation
- Calculate your real return (interest rate minus inflation)
- Move any 0% funds to the best available easy-access rate
- Consider your timeline — long-term money may warrant investment
- Review annually as both rates and inflation change
"Don't panic about inflation eating your emergency fund. Its purpose is security, not growth."
Accept the cost. Beat inflation with your long-term investments.
Put It Into Practice
Use our Compound Interest Calculator to see how different rates affect your savings growth over time, including inflation-adjusted projections.
Try Compound Interest Calculator