Your client signed the engagement letter, so why is there confusion about this month's invoice? The problem often lies in a disconnect between your contract and your bill. When your invoice terms and conditions don't perfectly match the master agreement, you open the door to disputes and payment delays. This guide explains how to create consistent, enforceable terms. More importantly, we’ll show you how to use a system where your initial agreement becomes the engine for your billing, eliminating manual errors and ensuring you get paid exactly as planned, without any surprises for you or your client.