Retirement Income Gap Calculator

Find the lump sum you need at retirement to bridge the gap between the income you want and the pension you expect.

Educational estimate only, not insurance, financial or legal advice.

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.

Built and reviewed by Nizam Ali, founder of Jobzbrv. Updated October 2026.

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