Performance-based financing becomes a common strategy to improve health sector quality. The findings of this paper imply that performance-based financing should take motivational effects and levels of provider capacity into account. Using a field experiment in the Democratic Republic of Congo, we find that financial incentives led to more effort from health workers on rewarded activities, without deterring effort on non-rewarded activities. We also find a shift from intrinsic to extrinsic motivation. Finally, the increased effort by health workers proved unsuccessful and led to a reduction in revenue, suggesting that health workers lacked the capacity to develop appropriate strategies to perform