INDEPENDENT PERSPECTIVES. ONE READING ROOM.From The Perimeter journal
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THE RESEARCH LAB

Compounding & cost lab.

Compare nominal and inflation-adjusted outcomes under your own assumptions. This is scenario arithmetic, not a forecast.

YOUR ASSUMPTIONS

After fees · nominal$459,456
In today’s dollars$280,393
Fee impact vs no fee$81,971

The same assumptions. Different outcomes.

Hypothetical annual compounding · USD

Horizontal axis: years. Total nominal contributions: $220,000. The fee impact includes foregone growth; it is not just the sum of charges.

How the model works & annual values

Each year, the existing balance earns the assumed return, then the percentage fee is deducted. A fixed nominal contribution is added at year-end and begins earning the next year. Real value = ending balance ÷ (1 + inflation rate)years. Returns and inflation are constant in this illustration. Taxes, withdrawals, transaction costs, and changing market conditions are excluded. Inputs are scenarios, not expected returns.

YearBefore feesAfter feesToday’s dollars
0$100,000$100,000$100,000
1$112,000$110,940$108,234
2$124,720$122,420$116,522
3$138,203$134,468$124,867
4$152,495$147,111$133,275
5$167,645$160,378$141,751
6$183,704$174,301$150,299
7$200,726$188,911$158,924
8$218,770$204,243$167,632
9$237,896$220,333$176,427
10$258,170$237,217$185,314
11$279,660$254,936$194,298
12$302,439$273,530$203,385
13$326,586$293,042$212,579
14$352,181$313,518$221,886
15$379,312$335,006$231,310
16$408,070$357,556$240,858
17$438,555$381,219$250,535
18$470,868$406,051$260,346
19$505,120$432,110$270,297
20$541,427$459,456$280,393

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