Professional services billing: how to pick the model that protects your margin
Your billing model decides who pays when an estimate turns out wrong, so choose it per engagement rather than by habit. Professional services billing is how a professional services firm turns delivered hours, phases or ongoing access into invoices a client agrees to pay. Before I joined Teamwork.com, I managed agency accounts where underbidding at the pitch caused most of the scope disputes that followed. That's why this guide treats the model as a risk decision.