[header] How to get paid on time when freelancing [title] Issue invoices for all work completed. [step] Invoices serve as a record of services performed. There is less recourse to following up complaints if you haven't kept a clear paper trail. 
Treat invoices in the same manner as a contract; their existence is a formal indicator of work performed and payment promised. [title] Put all the necessary information on the invoice from the outset.