Understanding the RRA percentage
What the RRA fee is, when it applies, and how the calculator handles it.
The RRA percentage is a Rwanda Revenue Authority levy applied to the gross value of the sale. Different minerals carry different rates - the calculator uses the admin-configured default for each mineral unless you override it.
If you're entering a custom rate, use a decimal fraction (0.04 for 4%) or a whole-number percentage - the calculator accepts both and normalises internally. Always double-check the result against your invoice.