All toolsSign inAll toolsSign inThis educational tool is free to use without an account. Change one input at a time, compare results and read the example and assumptions below. Results are illustrations, not forecasts or personal offers.
Tools for understanding money: change inputs and explore the results.
All toolsCompound interest is earning interest on interest that has already been added.
Leverage is increasing exposure using debt or another mechanism.
A chart displays data. Check what is measured, the units and the period before drawing conclusions.
A company may be insolvent if it cannot pay debts when due, or its liabilities exceed the value of its assets.
Risk is the possibility that the outcome will be different from expected, including loss.
Marginal tax applies to the last slice of income. Effective tax is total tax divided by income. They are different numbers.
Value added tax is a tax on transactions that are liable for it. In the consumer price it is usually already included.
A track defines how interest and principal can change. A mix divides borrowing between tracks.
A full budget includes land or property, additional costs and work, not just the headline price.
Start with fictional amounts that are easy to check without a calculator. Write down the inputs and the first result, then change just one assumption. This helps you identify what caused the difference instead of changing several factors together. Check whether amounts are monthly or annual, which currency is used and which costs are included. Two decimal places do not make an assumption certain. Finally, explain the result in your own words, identify missing information and note what you would need to verify before using real money.