That feels like progress before checking inflation.
Once the same period's inflation is subtracted from the nominal gain.
Evaluating dollar figures nominally, by default, unless corrected deliberately.
Notice the Bigger Number, Then Check It's Real
Charlie Munger's published work on the psychology of human misjudgment repeatedly examined how a familiar, visible number can distort judgment, and the psychology of misjudgment behind money illusion describes exactly this pattern applied to money: a nominal dollar gain feels like real progress by default, since nominal figures are what appear on every statement and paycheck. For example, consider a household whose home sold for $18,000 more than they paid five years earlier, celebrated as an $18,000 gain. Once cumulative inflation of roughly 19% over those five years was subtracted from the purchase price's real value, the actual real gain was closer to negative $400, essentially flat once true purchasing power was accounted for, despite the nominal number looking like clear progress. According to the USC archive of Munger's psychology speech, Munger repeatedly examined how a familiar, visible frame, in this case the nominal dollar figure, distorts judgment by default unless deliberately corrected. As of July 2026, this is especially important any time a dollar gain feels like clear progress without having checked the same period's inflation.
The $18,000 nominal gain looked like clear progress. The real gain, after inflation, was roughly flat.
Subtract Inflation Before Trusting the Feeling
Per Poor Charlie's Almanack, recognizing when a familiar framing distorts judgment was treated as one of the most valuable habits to build deliberately, since the distortion doesn't correct itself automatically. Comparing a nominal gain against the national average of 0.38% APY, held in an FDIC-insured account, alongside CFPB resources on inflation and purchasing power, makes the real, inflation-adjusted number concrete.
| Situation | Nominal feeling | Real check needed |
|---|---|---|
| Home sold for more than purchase price | Feels like a clear gain | Subtract cumulative inflation over the holding period |
| Salary raised in dollar terms | Feels like progress | Subtract the same period's inflation rate |
| Savings balance grown over several years | Feels like accumulated wealth | Compare growth against cumulative inflation |
| Real, inflation-adjusted gain confirmed | Genuine progress | No correction needed, the feeling matches reality |
Checking for money illusion has real benefits: it separates genuine, inflation-adjusted progress from a nominal number that only looks like progress. The risk of trusting the nominal feeling by default, as the home-sale example shows, is believing you've gained meaningfully when the real, purchasing-power-adjusted result is closer to flat. However, that said, it depends on the specific inflation rate compared to the nominal gain in question: a large nominal gain over a short, low-inflation period is more likely to be genuinely real, while a modest nominal gain over a long, high-inflation period is more likely to be an illusion. If you're deciding whether a dollar gain is genuine progress, choose to trust the nominal number if the relevant inflation rate over the same period is low; choose to calculate the real, adjusted gain if the period involved meaningful inflation. This is when this matters most: any time a dollar figure, a sale price, a raise, a balance, feels like clear progress without having checked inflation first.
A bigger nominal number feels like progress by default.
The correction doesn't happen automatically; it takes a specific step.
Use the inflation rate over the same span the gain occurred.
Genuine progress should hold up after the real-return calculation.
When This May Not Apply
Over a short period with genuinely low inflation, a nominal gain and a real gain are likely to be close to the same thing, and the correction matters less. This is especially important to distinguish from a longer period or a higher-inflation environment, where the gap between nominal and real can be substantial.
What to Do Next, in 20 Minutes
- Identify a recent dollar figure that felt like a gain: a sale, a raise, a balance increase.
- Find the cumulative inflation rate over the relevant period.
- Subtract it from the nominal gain to calculate the real result.
- Read a mental model for judging whether a raise actually beats inflation and circle of competence applied to understanding your own real wage trend for related frameworks.
- Read how does inflation affect your money for background on the underlying mechanism.
- Run a full Money Map check to see this alongside your full financial picture.
Sources and Methodology
This article applies Charlie Munger's published psychology-of-misjudgment work to household money illusion. It is educational and does not constitute personalized financial or tax advice.
- USC Munger speech archive· Checked 2026-07-10
- Poor Charlie's Almanack· Checked 2026-07-10
- Consumer Financial Protection Bureau consumer tools· Checked 2026-07-10
- SwitchWize methodology· Checked 2026-07-10
Next scheduled verification: 2026-10-10
Educational content from the SwitchWize Research Desk. Charlie Munger and related entities are not affiliated with or endorsing SwitchWize.
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Disclaimer
This article is educational and does not provide personalized investment, tax, legal, or financial advice. Charlie Munger, the Munger estate, Berkshire Hathaway, and related entities are not affiliated with or endorsing SwitchWize. References to public letters, speeches, and books are used for educational interpretation only.