Revenue is a vanity metric—at least on its own.
I’ve worked with dozens of founders and CEOs who knew their top-line number down to the penny but had no idea whether their business was actually healthy underneath it. The companies that scale well are run by leaders who know their critical numbers cold—not just revenue, but the metrics that predict where revenue is going and whether the business underneath it is strong.
Here are the five I care about most.
1. Gross Margin (and what’s inside it)
Gross margin is your revenue minus your direct cost of goods sold, expressed as a percentage. It tells you how much value you’re actually creating per dollar of revenue before overhead kicks in.
But the more important question is: what’s inside it?
A SaaS company with 65% gross margins might look fine—until you realize that half of their “cost of revenue” is customer success headcount that should actually be classified as a sales expense. Gross margin is only meaningful when it’s calculated honestly.
The benchmark matters too. SaaS businesses should be targeting 70–80%+. Services businesses often run 30–50%. If you don’t know what’s normal for your model, you don’t know if you have a problem.
What to watch: Is gross margin stable, improving, or eroding as you scale? Declining margins at scale are a structural problem, not a timing issue.
2. Cash Runway
Cash runway is how many months you can operate at your current burn rate before you run out of money. It’s the most existential number in any business.
The formula is simple: Cash on hand ÷ Net monthly burn = Runway in months.
But the insight isn’t in the formula—it’s in what you do with it. Your runway determines the risk profile of every decision you make: how aggressively you hire, whether you discount to close a deal, how long you can wait before a fundraise.
What to watch: Minimum 12 months of runway at all times for a growth-stage business. If you’re under 6 months, it’s a crisis, not a metric.
3. Net Revenue Retention (NRR)
For any recurring revenue business, NRR is arguably the most important single metric. It measures what percentage of your revenue from existing customers you retain and grow over time—accounting for churn, contraction, and expansion.
An NRR above 100% means your existing customers are growing faster than you’re losing others. That means you can grow without acquiring a single new customer. That is an enormously powerful business characteristic.
An NRR below 90% means you have a leaky bucket—no matter how much revenue you add through sales, you’re losing it out the back.
What to watch: Best-in-class B2B SaaS companies target 120%+ NRR. If yours is below 100%, it’s the most important thing to fix in your business, full stop.
4. CAC Payback Period
Customer Acquisition Cost (CAC) payback measures how long it takes to recover the cost of acquiring a new customer through their gross margin contribution.
The formula: CAC ÷ (Monthly Revenue per Customer × Gross Margin %)
If it costs you $10,000 to acquire a customer and they pay you $1,000 per month at 70% gross margin, your payback period is about 14 months.
Why does this matter? Because the payback period determines how capital-efficient your growth is. A company with a 6-month payback can reinvest returns quickly and grow efficiently. A company with a 36-month payback is effectively a bank—lending money to customers and waiting years for repayment.
What to watch: Under 18 months is good for most SaaS businesses. Under 12 is great. Over 24 is a warning sign.
5. Operating Cash Flow vs. EBITDA
Most companies track EBITDA (earnings before interest, taxes, depreciation, and amortization) as a proxy for profitability. But EBITDA can be misleading—especially when working capital is moving around.
Operating Cash Flow tells you what’s actually coming in and out of your bank account from operations. The gap between EBITDA and Operating Cash Flow is one of the most revealing things in a business’s financials.
A company with strong EBITDA but weak operating cash flow might have:
- Customers on long payment terms who aren’t paying
- Inventory building up unsold
- Deferred revenue being recognized before it’s earned
What to watch: Over a rolling 12-month period, operating cash flow and EBITDA should be converging. Persistent gaps deserve investigation.
The point
Knowing these numbers doesn’t make you a CFO. But it makes you a better CEO—one who can spot problems before they become crises, ask the right questions of your finance team, and have credible conversations with investors and board members.
The best financial leaders I’ve worked with don’t just know these numbers. They know why they’re moving, what’s causing the movement, and what they’re doing about it.
That’s the difference between financial reporting and financial leadership.
Want help building a dashboard around these metrics for your business? Let’s talk.