When planning pension funding, inflation is often acknowledged but not always fully reflected in contribution decisions. Using an average inflation rate of around 5% over recent years helps to illustrate why this matters so much. Even when inflation appears to be easing in the short term, its long-term effect on retirement income can be significant.

Inflation erodes purchasing power. A pension pot that looks comfortable today may buy far less in real terms by the time retirement arrives. At an average inflation rate of 5%, prices double roughly every fourteen years. This means that someone planning to retire in twenty years’ time will need close to twice the income they might intuitively expect, just to maintain the same standard of living. Ignoring inflation risks building a pension fund that appears adequate on paper but falls short in practice.

Inflation also affects investment returns. Pension growth is often discussed in nominal terms, but what really matters is real growth, that is growth after inflation. A fund growing at 6% per year sounds healthy, but if inflation is averaging 5%, the real increase in value is modest. This has implications for asset allocation, contribution levels and the balance between growth and lower risk investments as retirement approaches.

For those making regular contributions, inflation should influence both the starting level and how contributions increase over time. Flat contributions that are not reviewed regularly lose real value year by year. Linking contribution increases to inflation or at least reviewing them periodically in light of inflation trends, can make a material difference to the eventual outcome.

Finally, inflation uncertainty reinforces the importance of flexibility. Retirement may last twenty or thirty years, during which inflation will vary. Building in a margin of safety, through higher contributions or diversified investments, can help protect against prolonged periods of higher inflation.

Taking inflation seriously is not about pessimism. It is about realism. Factoring an average inflation rate of 5% into pension planning leads to better informed decisions and a greater chance that retirement income will meet expectations when it is most needed.