If we analyze our unpaid loans versus our entire loan book over our entire lending history, our default rate is 0.5%. That is already an impressive achievement and certainly the lowest default rate ever achieved for any factoring company in Brazilian history. How then can we be so audacious to report a 0% default rate? The standard convention for computing default is to include late fees to offset defaults. According to that standard, our official default rate is actually -0.5%. For simplicity, we report 0%. Most people have never heard of a lender having a negative default rate! As with any significant achievement, the main ingredient in reaching our target was a lot of hard work and late nights at the office. Along the way, we also identified some other key learnings that made a big difference.

https://medium.com/inside-weel/how-weel-reached-a-zero-percent-default-rate-12582e52c2f3