Compounding Missed Years Cost Calculator

Work out compounding missed years cost instantly with clear inputs, formula shown and shareable results.

About Compounding Missed Years Cost Calculator

Money left idle does not simply lose those years' returns — it loses the compounding those returns would themselves have earned. Six idle years at 10% costs roughly three quarters of the original amount over a further twenty.

Formula

Compounding lost

Loss = amount × [(1+r)^(missed + remaining) - (1+r)^remaining]

Worked example

With the default values below, Compounding Missed Years Cost Calculator returns Value Lost To The Idle Years of $2,595,338.29. Change any input above and every figure here is recalculated in your browser.

Inputs used

Amount Not Investedminimum 0: 500,000
Expected Annual Returnaccepts 0–100 %: 10 %
Years It Sat Idleaccepts 1–40: 6
Years Remaining To The Goalaccepts 1–50: 20

Results

Value Lost To The Idle Years: $2,595,338.29
Value If Invested From The Start: $5,959,088.27
Value If Invested From Today: $3,363,749.97
Loss As A Multiple Of The Amount: 5.191

Step by step

1Values used
2Compounding lost
3Value Lost To The Idle Years= 2,595,338.29
4Value If Invested From The Start= 5,959,088.27
5Value If Invested From Today= 3,363,749.97
6Loss As A Multiple Of The Amount= 5.191

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or fees or charges into account.
Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Figures are estimates for planning only. Prices, returns, inflation and personal circumstances all change. This is not financial or tax advice — speak to a qualified adviser before making decisions.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Figures are estimates for planning only. Prices, returns, inflation and personal circumstances all change. This is not financial or tax advice — speak to a qualified adviser before making decisions.

Frequently Asked Questions

Why is the loss so large?

Because the early years are the base on which all later growth builds. Losing them shifts the whole curve down.

Does this apply to cash held for emergencies?

No. Emergency cash serves a purpose — this applies to money with no near-term use sitting uninvested.