A real difference
Bicycle’s published overview gives zero for a failed contract. Pagat’s basic partnership account deducts ten times the bid. These descriptions should not be merged into one unlabelled scoring rule.
Our tool’s choice
The calculator on this site follows the ordinary-contract part of Pagat’s basic partnership account, with the ten-bag penalty enabled. It does not implement Nil or house variants.
Keep a full agreement
Before entering a result, confirm the complete scoring rules with your group. The manual scorebook accepts an agreed net change without deciding which rule is correct for your table.