Money, Explained From the Inside

Tools / Plan ahead / Chapter 24 · Retirement Across Systems

Retirement readiness

Combine what you have, what you add, what other income you expect, and the income you want, all in today’s money, to see whether you are on track and what closes any gap.

1 · The idea

Pot needed and projected

Subtract income that does not come from your pot (state pension, workplace pension, rent) from the income you want. What remains must come from the pot, which at a chosen withdrawal rate tells you the pot required. Project the pot you will actually have, in today’s money, to compare.

The formula

Pot needed = (income wanted − other income) × 12 ÷ withdrawal rate

income wanted
monthly spending you aim for, in today’s money
other income
monthly pension or other income expected, today’s money
withdrawal rate
share of the pot taken yearly

2 · A worked example

From 35, retiring at 65, with $20,000 saved and $400.00 a month at 5% (2% inflation): the pot reaches about $227,778 in today’s money. Wanting $3,000 a month with $1,000 from elsewhere needs $600,000; the monthly shortfall is $1,241, closed by about $826.89 more a month.

3 · Now use your own numbers

Change anything. The result updates instantly.

Try an example

State or workplace pensions, rental income.

Projected pot (today’s money)
$227,778$412,589 in future money
Pot needed (today’s money)
$600,000
Monthly shortfall
$1,241Pot would pay $759.26 a month; you need $2,000
Extra to save each month
$826.89Starting now
Years to go
30

What this means

If you are short, there are four levers in order of power: save more, retire later, expect to spend less, or increase other income. Retiring two years later usually helps more than people expect: more contributions, more growth and fewer years to fund.

Treat this as a yearly check, not a forecast.

Illustrative, not personal advice. Inspired by Chapter 24 · Retirement Across Systems of Money, Explained From the Inside. Your figures stay in this browser. Real products add terms, taxes and conditions that this simple model leaves out.

4 · Take care

What this tool can’t see

  • Other income is often taxed and may be uncertain or depend on where you lived and worked: check your entitlements.
  • Life expectancy is uncertain: plan for a long retirement.
  • Everything is in today’s money; the tool deflates the projected pot for you.

5 · Go further

Where this fits

See it in a life:

MariaThe quiet power of margin GraceRetirement across systems

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