This article uses a new dataset of 330 slaving voyages to examine terms of credit issued for British American slave sales between 1755 and 1807. It shows that credit terms consistently varied between American colonies, and that slave ship captains considered these differences when electing where to land enslaved Africans. Our dataset also shows that credit terms were highly erratic, especially in the last quarter of the century, contributing to both surges and collapses in the slave trade to individual colonies, and in the trade as a whole. Four such instances are examined in detail to show that instability in credit terms played an important and hitherto unacknowledged role in the volume and direction of Britain’s transAtlantic slave trade in the second one-half of the eighteenth century