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Inflation is the quietest risk in financial planning. It does not arrive as bad news on a given day; it simply makes the same income buy less each year.

In short
  • At 3% inflation, prices roughly double over 24 years.
  • A fixed income loses purchasing power every single year.
  • Holding too much in cash carries its own long-term risk.
  • Retirement spending is rarely flat, which changes the picture.

How quickly does inflation halve your spending power?

At 3% a year, prices roughly double over 24 years. Someone retiring at 65 with an income that feels comfortable may find it buys around half as much by 89 — well within a normal life expectancy.

That is not a market crash. It is just time passing.

Which retirement incomes are most exposed to inflation?

Fixed incomes are most exposed — a level annuity, or drawdown taken at a flat amount and never reviewed. Both feel safe precisely because the number does not move, which is the problem.

Is holding cash actually safe over the long term?

Cash feels like the safe option and, for short-term needs, it is. Over decades it is different: if interest after tax is below inflation, the real value falls year after year, reliably.

Holding a sensible cash buffer is prudent. Holding a retirement's worth of cash for thirty years usually is not.

What protects a retirement plan against inflation?

  • Some growth exposure. Assets with the potential to outpace inflation over the long term, sized to a level of risk you are genuinely comfortable with.
  • Index-linked secure income. The State Pension and many defined benefit schemes rise with inflation — worth knowing exactly what you already have.
  • Realistic spending assumptions. Spending often falls in the middle years of retirement and rises again later. A flat assumption overstates the problem in one place and understates it in another.
  • Regular review. A plan built on 2% inflation needs revisiting if the world delivers 5%.

What is the real risk inflation poses to a plan?

Inflation does not usually break a plan on its own. What breaks plans is assuming it will not happen, and never checking.

This article is general information, not personal advice. The value of investments can fall as well as rise and you may get back less than you invested. Past performance is not a reliable indicator of future performance. The information contained within this article was accurate at the date of publication and is subject to change. Reviewed by Bright Wealth before publication.