Percentage calculator →
Check a proportion or percentage change.
SubeR WORK / TOOLKIT
Explore growth, purchasing power and fee scenarios. No recommendations.

WORKSHEET / EDUCATIONAL SCENARIO
Explore a fixed annual rate and contributions made at each year-end.
For each year: balance = previous balance × (1 + rate ÷ 100) + contribution. Contributions are added at year-end. No fees, taxes, withdrawals or inflation are included. Rates can be negative, down to −100%. Constant returns are hypothetical; actual returns vary and can be negative. No rate is recommended. Annual balances are not rounded; final displays round to cents.
WORKSHEET / EDUCATIONAL SCENARIO
See both directions of an inflation assumption, using the same starting amount.
Today’s value of that future amount = amount ÷ (1 + inflation ÷ 100)^years. Future amount with today’s purchasing power = amount × (1 + inflation ÷ 100)^years. A fixed-rate illustration, not a current inflation reading or forecast. Rate must be greater than −100%. Intermediate values are not rounded; final displays round to cents.
WORKSHEET / EDUCATIONAL SCENARIO
Compare two hypothetical percentage fees under identical growth assumptions.
For each year: grow the balance by the assumed gross rate, then deduct the annual fee as a percentage of that post-growth balance. No contributions, withdrawals, fixed charges, taxes or other fees. A minus B is the ending-balance difference. Real fee timing and fee bases vary. Annual balances are not rounded; final displays round to cents. This is not a product comparison or recommendation.
Check a proportion or percentage change.
Compare dates, not regulatory deadlines.
Compare costs on the same basis.
Official educational scenario tool.
Official explanation of fee effects.
Official explanation of purchasing power.
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