Contractor margins live and die in the same places: how you price jobs, how you bill across milestones, how you collect when the work is done — and which processor is sitting underneath all of it taking its cut. A useful starting point is contractor merchant services, which compares ACH-vs-card economics, mobile acceptance on-site, and progress-billing tooling built around how trades actually invoice. Crews ready to evaluate providers can review credit card processing for contractors tuned to field-service realities rather than retail templates.