When you create an invoice in the web user interface, Tradeshift is doing the calculations. Our rounding model is "round half to even". Thus, for example, €1159.125 becomes €1159.12, and €231.837 becomes €231.84.

For a truly random set of decimal numbers, this type of rounding will not skew the totals up or down significantly, so it is favored as a fair rounding system in financial applications.