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Last reviewed: September 6, 2026

Found a bug, spotted a stale number, or want a calculator I don’t have yet? Reach out — I read every message myself.

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What to write in about

Data or calculation errors

A figure that looks outdated, or a calculator output that doesn’t match what you’d expect.

New calculator ideas

A VOO-related scenario or comparison you wish this site covered.

Corrections

A broken link, a stale source, or a methodology note that needs a second look.

Anything else

General feedback, questions about how a tool works, or just to say hello.

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    What I don’t offer: personalized investment, tax, or legal advice about your specific situation — for that, a licensed financial advisor or accountant is the right call. I’m glad to help with anything about how the calculators themselves work or where a number comes from.

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