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🗓️ Engines

Capital gains timing

When you sell can change after-tax compounding as much as what you own — holding periods, lots and wrappers.

At a glance
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Score profile

Each bar is a 0-100 atlas score for this topic, not a timeline.

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Growth over time
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Timeline

Milestones in order. This is history, not a weekly activity grid.

c. 1800 BCE Early interest tabletsc. 1800 BCE1202 Fibonacci’s Liber Abaci12021494 Pacioli & double entry149417th c. Annuities & mortality17th c.1930s–50s Modern TVM teaching1930s–50s1970s Index funds arrive1970s2000s Target-date defaults2000s2010s–20s Apps & FIRE discourse2010s–20s
  1. Early interest tablets
  2. Fibonacci’s Liber Abaci
  3. Pacioli & double entry
  4. Annuities & mortality
  5. Modern TVM teaching
  6. Index funds arrive
  7. Target-date defaults
  8. Apps & FIRE discourse
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17 min read

Share this scenario guide before comparing savings, debt or investment choices.

Last reviewed Sources & creditsMedia creditsMethodology

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Reviewed 2026-08

Capital-gains timing is about when gains are realised into the tax system — a first-class lever on the after-tax rate that actually compounds.

Capital gains timing sits in the engines family of this atlas: mechanisms first, products second, hype never.

Use the calculator for scenarios, then return to the section pages when you want the vocabulary behind the curve.

LeverWhen you realise
ToolLots / wrappers
TrapTurnover churn
AllyLong holding
LensAfter-tax r
ToneEducational

Profile

Time sensitivity
72
Rate sensitivity
58
Contribution leverage
42
Behaviour risk
48
Tax & fee drag
94
Horizon fit
76

Seven chapters

Frequently asked questions

What is capital gains timing in one sentence?
Capital-gains timing is about when gains are realised into the tax system — a first-class lever on the after-tax rate that actually compounds.
Is this financial advice?
No. Tool-Lifes pages are educational atlases. Decisions need your goals, constraints and, when appropriate, a licensed adviser.
Do I need a high return for compounding to matter?
Higher net rates help, but time and contributions often dominate — especially early. Costs and behaviour can erase a “good” rate.
How should I use the calculator?
Treat outputs as scenario sketches. Vary contribution, rate, fees and inflation to see which lever moves your goal date.
What about inflation?
Always ask whether a figure is nominal or real. A high nominal path can still lose purchasing power.
Are past returns a promise?
No. Illustrations use round teaching numbers. Markets, inflation and taxes change.
Where do fees show up?
In the net rate that compounds. Expense ratios, advice charges and spreads all reduce terminal wealth.
What page should I read next?
From foundations, continue to contributions-vs-rate or fee-drag; for behaviour, open consistency-habit or panic-selling.