03 · Time Does the Heavy Lifting
The video shows the curve. This page shows the loop that draws it, one month at a time: what growth is charged against, why the early years feel like nothing at all, and the moment the arithmetic quietly takes over the work.
WHAT THIS LESSON TEACHES
- Growth charged on top of growth already earned is what makes the line bend upward.
- Seventy-two divided by the yearly rate gives a rough count of years per doubling.
- Mateo's $3,600.00 beat Carmen's $11,100.00 because it had 60 years instead of 37.
- Elena's nine years still turned $10,800.00 into $15,073.31, so late is not the same as pointless.
- The years are the input nobody can add to later, which makes today the cheapest day available.
THE ONE ACTION
Start one automatic monthly transfer this week, at whatever size never gets argued with
One action per lesson. Not a homework pile — one thing, small enough that it actually happens this week.
YOUR FAMILY HANDOUT
PDF
The Hourglass Study GuidePublished worksheet for this lesson
GO DEEPER IN THE BOOK
Money, Start Here
Chapter 3, page 24
The expanded edition of this lesson's handout, sold separately: ten pages on this one lesson — the story, the worked math at three scales, the six what-ifs, the traps, and the deeper layer.
Digital edition · $9.99Paperback on Amazon · $24.99WORDS IN THIS LESSON
COMPOUND GROWTHPRINCIPALRULE OF 72TIME HORIZONCONTRIBUTIONVOLATILITY
Plain about what this is. General financial education, not financial advice, not tax advice or investment advice, and not a recommendation about your situation. Every dollar figure is an invented practice number for a made-up household. Written for adults, 18+.