My payment structure is back-loaded but analyze: should I get paid upfront? Map payment timing: what I can negotiate for upfront payment? Calculate: if I required 50% upfront, would it filter wrong clients and improve cash flow? Show me the payment structure options: these timing arrangements. Give me the upfront strategy: require this much upfront for these reasons. Include: how to require upfront payment without losing clients, why upfront payment filters serious buyers, and whether back-loaded payment is causing cash flow problems.