The gap, not the total
Retirement planning gets simpler when you stop asking “how much do I need in total?” and ask “how much of my monthly income is still uncovered?” That gap — desired income minus expected pension — is the number your savings must fill.
What the calculator does
It takes the monthly gap, converts it to a yearly figure and prices it as a lump sum using your expected investment return over the retirement years. Then it works backwards to the monthly saving needed from today.
A worked example
Age 45, retiring at 65, wants $4,000 a month, expects $1,500 from pension. The $2,500 monthly gap is $30,000 a year; at a 4% return over 25 retired years that prices at about $469,000 — roughly $1,290 a month saved over twenty years.
Where life insurance fits
Cover protects the plan, not the goal. If the household depends on your income until retirement, a term policy sized to the remaining saving years keeps the gap funded even if you are not there to save.
What it cannot see
Tax, inflation after retirement, health costs and market swings are outside the model. Use the answer as a sensible first draft and revisit it every few years.
Common questions
Is my pension estimate reliable?
Treat it as a planning figure, not a promise. Check your latest pension statement and update the number whenever it changes.
What return should I assume?
Four percent is cautious. Use a lower number if you want a safety margin, and never assume the best years repeat.
Does this replace financial advice?
No. It is a starting point that makes the conversation with an adviser concrete instead of vague.