Ask an owner "how's business?" and you'll usually get a feeling. Ask a good owner and you'll get numbers — not because they memorized a dashboard, but because they track a short list so consistently that the answers live in their head. This lesson is that list: eight numbers, why each earns its slot, and the one-page scorecard that holds them. It's the capstone of the reading-the-numbers lessons — everything here was defined earlier in the pillar.
1. Cash on hand. The survival number. Not roughly — actually. An owner who knows cash within a few hundred dollars makes different (calmer, better) decisions than one who knows it within ten thousand.
2. Cash needed, next 30 days. Payroll, rent, loan payments, tax remittances, big supplier bills. The pair of #1 and #2 is your short-term oxygen reading; the 13-week forecast extends it to a horizon.
3. Monthly revenue — and what normal is. Last full month, alongside your rolling 12-month average. Knowing "normal" is what makes a weird month feel weird in week two instead of quarter three.
4. Gross margin %. Profit per revenue dollar after delivery. The single best early-warning number in the business: pricing, costs, discounting, and mix problems all surface here first.
5. Operating profit (dollars). What the machine produced this month after overhead. Percent is for diagnosis; the dollar figure is what funds debt, taxes, reserves, and you.
6. Accounts receivable total — and the over-60 slice. What you're owed, and how much of it is going stale. The over-60 number should have names attached, not just digits.
7. Monthly overhead (the "nut"). What existing costs you before selling anything. Owners who know their nut can compute survival math in their head: cash ÷ nut ≈ months of life at zero sales. That's runway — the same number startup founders obsess over, equally vital at a lawn-care company.
8. Break-even revenue. The monthly sales level where you stop losing money: overhead ÷ gross margin. (With a 40% gross margin and a $12,000 nut: $30,000/month. The break-even lesson derives this properly.) Every month's revenue silently grades against it.
Deliberately absent: vanity numbers. Followers, traffic, "pipeline," bookings that haven't billed. Fine numbers for marketing meetings; none of them belongs on the survival card.
One page — a spreadsheet with 8 rows and a column per month. Update rows 1–2 weekly (two minutes from the bank and the bills list); rows 3–8 monthly at the close ritual. That's the entire system.
The compounding effect is real: after six months of filling it in, you'll answer "how's business?" with "cash is fine, margin slipped two points on the big jobs, AR over-60 doubled — I'm on it" — in one breath. That sentence is what knowing your numbers actually means, and lenders, partners, and buyers can hear the difference instantly.