Money, Explained From the Inside

Tools / Plan ahead / Chapter 23 · Your Largest Asset: Earning Power

Return on skills

Your ability to earn is usually your largest asset. Treat learning like an investment: compare what it costs (including income forgone) with the extra income it could bring.

1 · The idea

Net present value of the uplift

Add the money you spend and the income you give up now. Then add the extra income each year, shrunk by a discount rate because money later is worth less than money now. A positive NPV means the investment pays more than your chosen return.

The formula

NPV = −outlay + Σ uplift ÷ (1 + d)^t

outlay
fees plus income forgone while studying
uplift
extra income per year, after tax
d
your discount rate: what the money could earn elsewhere

2 · A worked example

A $3,000 course plus $1,000 of income forgone, raising earnings by $2,000 a year for 10 years: pays back in 2 years; total gain $16,000; NPV at 5% $11,443.

3 · Now use your own numbers

Change anything. The result updates instantly.

What the money could otherwise earn.

Pays back in
2 years
Net present value
$11,443
Total outlay
$4,000
Total extra income over the period
$20,0005× the outlay

What this means

A positive NPV means that, at your discount rate, the investment pays for itself and more. A short payback reduces the risk that circumstances change before you benefit.

Compare this with other uses of the same money and time: there is always an alternative, including doing nothing.

Illustrative, not personal advice. Inspired by Chapter 23 · Your Largest Asset: Earning Power 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

  • The uplift is the hard number to know: be conservative and test a lower case.
  • Benefits such as security, satisfaction or optionality do not appear here.
  • Use after-tax uplift.

5 · Go further

Where this fits

See it in a life:

DavidIncome without wealth SofiaBuffers and irregular income

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