- simple interest: the future value of the capital
*K*,_{n} - interest rate: interest rate
*n*(*t*), - discount: amount paid
*K*,_{ob} - compound interest: the future value of the capital Kn,
*K*,_{n} - interest rate: net interest rate
*i*._{č}

- short term savings: saved amount
*S*,_{x} - long term savings: saved amount
*S*.

Unless stated otherwise, the *30E/360* (German method) is used here.

If an interest tax is used in the examples, a withholding tax of *15 %* is calculated.

I rounded to *two decimal places* by default. I round the days for whole days. Decimal years round to four decimal places.

When calculating the interest period, the first day of the deposit (or loan) is calculated and the last day of the deposit (or loan) is not calculated. From the two extreme days, therefore, only one day is counted.

If the interest rate is given monthly, semi-annually, quarterly or annually, I assume that the interest starts on the first day. So I count for a *whole month, quarter, semester or year*.

Unless otherwise specified, I count the *one-year* interest period.