What this calculator tells you
A $500,000 policy bought today sounds like a lot of money, and in today's prices it is. Twenty years from now, though, the same dollars will buy far less. Mortgages, college fees, and everyday living costs all rise, while a level life policy stays fixed, so the protection quietly shrinks every year.
This calculator makes that shrinkage visible. It grows today's cover amount by inflation over the years you choose, and shows the shortfall a family would face if they bought only today's amount and never reviewed it.
The formula behind the result
Future cover needed = today's cover amount x (1 + annual inflation) raised to the number of years; shortfall = future cover needed minus today's amount.
The formula is compound growth, the same idea behind savings interest, but applied to prices. Each year, the amount needed grows by the inflation rate, and the next year's growth applies to the already-grown figure. Over twenty years, even a modest rate adds up to a large gap.
The calculator assumes one steady inflation rate for the whole period, which will not match reality year by year. Use it to judge the size of the risk, not to predict an exact future price. A rate near your country's long-run average gives the most useful illustration.
How to fill in each field
- Enter the cover amount you would buy today.
- Set the annual inflation rate you expect, such as 2% or 3%.
- Set the years ahead, often until a mortgage ends or children are grown, then read the future need and the shortfall.
Worked example
Take $500,000 of cover today, inflation of 3% a year, and a 20-year horizon. Compounded, the amount needed to buy the same value in 20 years is $903,056, so buying only $500,000 leaves a shortfall of $403,056.
That gap is larger than many families expect from a small-sounding 3% rate. At 2% inflation the future need would be about $742,974, which still leaves a gap near $242,974, so even low inflation deserves attention.
When the result may be too high or too low
Inflation is not steady, and no single rate will be right for every year. The result is an illustration of purchasing power, not a forecast, and it does not account for wage growth, savings growth, or debts that shrink over time.
The answer is not always to buy more cover now. Some families prefer increasing-term cover, regular reviews, or a larger amount for a shorter period. What matters is that the choice is made with eyes open, not by assuming today's dollars will still be enough.
Frequently asked questions
Why does inflation matter for life cover?
Because a dollar buys less after years of inflation. Cover that looks generous today may fall well short of a mortgage balance, college costs, or living expenses priced in future dollars.
Can a policy keep up with inflation automatically?
Index-linked or increasing-term policies raise cover each year, usually with rising premiums. They cost more than level cover, but they protect purchasing power without a new medical exam in most cases.
How often should I review the cover amount?
Review the amount every few years, and after big changes such as a house move, a new child, or a job change. A small yearly increase beats a large catch-up purchase later, when age makes cover more expensive.
More calculators
Related guides
Edited and checked by Talha Shah. Last reviewed 2026-11-04.