Two sliders. The number nobody puts on their P&L.
How it works: invoicing ÷ 30 × days late = the receivables balance created purely by lateness. That balance × your funding rate = the yearly cost of carrying it. It excludes the chasing time and the deals you pass on for want of cash — the real number is higher. Benchmark: OneBook SME Cash Flow Report, 2026 ($2,408 a month, about $29,000 a year).
Who owes you what, how late, and what it costs — watched every week, including payroll. It is the first thing every client gets.