A plain-English explanation of lifetime tax burden logic, variable meanings, and edge cases that confuse most users.
Most “wrong answers” are input problems, not calculator problems. A quick pass through the lifetime tax burden logic makes it easier to enter the right numbers.
If you can explain how start age, end age, and income assumptions connects to estimated tax paid and tax-to-income ratio, you’re unlikely to be fooled by a fragile scenario.
The calculator translates your inputs into a consistent model so you can compare scenarios with the same rules.
Change one variable at a time and confirm the output direction matches intuition.
Most sensitivity lives in 2–3 fields: start age, end age, and income assumptions.
When the result surprises you, simplify the scenario and confirm each field definition.
Avoid impossible combinations (negative values, unrealistic rates, mismatched time horizons).
If the outcome is close to your threshold, run a conservative downside case before deciding.