Inflation Compounds. It Does Not Add.

Multiply, do not add the rates

One hundred dollars grown at 3% for twenty years needs about $180 to buy the same basket if that rate holds. Adding 3% twenty times would suggest $160 and would be wrong. The inflation calculator compounds forward or backward.

A steady rate is a planning model. College, medical care, and rent can run hotter than a broad index. Raise the rate for those costs. When you are judging an investment, pair this with the real-return page so purchasing power and the stated return stay distinct.

Run the same question with your figures

Inflation Compounds. It Does Not Add. points to the Inflation Calculator because the note is about the same dollars, a different year. The form on that page asks for Amount in today’s dollars ($100.00), Annual inflation (3%), Years (20), Direction (Cost in the future). Its opening example produces Future cost is $180.61. Use the article to see which piece of the payment, the tax, or the balance the heading is talking about. Use the calculator when you want the same relationship with your own inputs. The two pages are not copies of each other.

Inflation Compounds. It Does Not Add. points to the Real Return Calculator because the note is about the return that is left after inflation. The form on that page asks for Nominal return (8%), Inflation (3%). Its opening example produces Real return is 4.85%. Use the article to see which piece of the payment, the tax, or the balance the heading is talking about. Use the calculator when you want the same relationship with your own inputs. The two pages are not copies of each other.

How to read this note

Inflation Compounds. It Does Not Add. is one question, not a plan for every account you own. The opening claim is this: Three percent for twenty years is not a 60 percent increase. The sections above stay on that claim. They use a worked figure so the relationship is visible. A worked figure is not a prediction that your loan, your fund, or your tax year will match it.

Read the headings in order. Multiply, do not add the rates. If a sentence names a calculator, that link is the place to change the inputs. If a sentence names a limit, the limit is the one published for the year written on the page, which is 2026 where this desk cites a retirement or tax figure.

A senior reading of a finance page looks for three things. The formula should match the labels. The example should be reproducible on the calculator. The page should say what it leaves out. This note tries to do those three. It does not tell you to borrow, to sell, to contribute the maximum, or to file a return from the illustration.

What the note leaves out

Inflation Compounds. It Does Not Add. ignores facts it does not mention. Fees, state tax, a credit score, an employer match you have not typed, and a market that refuses to pay a flat rate are all outside the paragraph. When one of those facts is the actual question, open the calculator that asks for it or read the disclaimer before you move money.

Published 25 Oct 2026. If a public figure in the note is later revised by the IRS, a lender, or a data source, the calculator page and the methodology are the places this desk updates. The note does not store what you type, and it is not a message from a broker or a tax preparer.

Before you treat the example as yours

Inflation Compounds. It Does Not Add. uses a specific illustration so the relationship is easy to see. The category is Everyday Money. The tools sitting next to the note are Inflation Calculator, Real Return Calculator. Open one of them, replace the example, and press Calculate if the decision in front of you depends on your balance, your rate, or your income. The article does not update itself when those facts change.

A careful reading checks three matches. The heading should be the question you have. The worked number should use inputs you can point to. The omitted items, named above, should be irrelevant or added back in a field. If any of the three fails, do not stretch the conclusion. Three percent for twenty years is not a 60 percent increase.

Keep the note and the calculator apart in your notes. The note explains why the pieces move. The calculator shows how far they move once you type them. Publishing date 25 Oct 2026 is the version of the explanation you are reading. Public limits can change after that date, and the methodology is where this desk records the figures it is willing to stand behind.

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