#### FINANCE.RATE

```
FINANCE.RATE(periods, amount, value, future_value = 0, end_or_start = 0, rate_guess = 0.1)
```

Calculates the interest rate of an annuity investment based on constant-amount periodic payments and the association of a constant interest rate.

**periods:**Number of payments to be made.**amount:**The amount paid per period.**value:**The current value of the annuity.**future_value:**The future value remaining after the final payment.**end_or_beginning:**Whether payments are due at the end (0) or the beginning (1) of each period.**rate_guess:**Estimate for the interest rate.