Write one schedule of recurring tasks, entities, ledgers, transaction volumes, systems, cutoff times, deliverables, exception ownership, and review responsibilities. State expected capacity and seasonal peaks. Ask each option to price that same package and identify exclusions.
Use the BLS occupational description as a scope check, not a rate card: transaction entry, records, reports, and reconciliation work differ from policy decisions, final accounting judgments, payment release, and controller review. If one quote includes managed review and another supplies preparation capacity only, their headline prices do not represent the same service.