- The 6 metrics that tell you whether your business is truly healthy
- How to calculate each one and what a healthy number looks like
- Which single metric, if it hits zero, ends your business
- How to build a simple monthly financial review routine
Most small business owners know their bank balance. Fewer know their gross margin. Even fewer know their customer lifetime value, their churn rate, or their monthly recurring revenue. The founders who scale successfully are the ones who run their business on numbers, not feelings.
Here are the six financial metrics that matter most for a scaling small business, and how to calculate each one.
1. Gross profit margin
What it is: The percentage of revenue left after paying the direct costs of delivering your product or service.
Formula: (Revenue − Cost of goods sold) ÷ Revenue × 100
What it tells you: Whether your pricing covers your costs with enough left over to run the business. A healthy gross margin for a service business is 60-80%. For a product business, 40-60% is typical.
If your gross margin is below 30%, you will struggle to cover your overheads (rent, salaries, marketing, software) no matter how much revenue you generate. Fix your pricing or your cost structure before scaling.
2. Net profit margin
What it is: The percentage of revenue left after paying all costs — direct costs and overheads.
Formula: Net profit ÷ Revenue × 100
What it tells you: How efficiently your business converts revenue into actual profit. A healthy net margin for a small business is 10-20%. Below 5% leaves very little room for error.
3. Monthly recurring revenue (MRR)
What it is: The predictable revenue your business generates every month from subscriptions, retainers, or recurring contracts.
Formula: Sum of all active recurring revenue in a given month
What it tells you: How stable and predictable your revenue base is. High MRR means you start every month knowing most of your revenue is already secured. A business with €50k MRR is fundamentally more stable than one with €600k in annual project revenue.
4. Customer acquisition cost (CAC)
What it is: The average cost of acquiring one new customer.
Formula: Total sales and marketing spend ÷ Number of new customers acquired
What it tells you: Whether your marketing investment is sustainable. CAC should always be compared to customer lifetime value (see below). If it costs you €500 to acquire a customer who spends €200, your business is losing money on every customer.
5. Customer lifetime value (CLV or LTV)
What it is: The total revenue you expect to generate from a typical customer over the entire relationship.
Formula: Average purchase value × Purchase frequency × Average customer lifespan
What it tells you: How much you can afford to spend to acquire a customer. The ratio of LTV to CAC should be at least 3:1 for a healthy business — meaning you earn at least €3 for every €1 you spend acquiring a customer. A ratio below 1:1 means you are losing money on every customer you acquire.
6. Cash runway
What it is: How many months you can operate at your current burn rate before running out of cash.
Formula: Current cash balance ÷ Monthly net cash outflow
What it tells you: How much time you have before a cash crisis. Most financial advisors recommend maintaining at least 3-6 months of cash runway at all times. If you're below 2 months, this is an emergency — not a planning problem.
Cash runway is the one metric that, if it hits zero, ends your business regardless of how profitable you are on paper. Profitable businesses run out of cash all the time — usually because they are growing fast, paying suppliers before customers pay them, or not managing their receivables. Know your runway at all times.
How to track these metrics
You don't need complex software to track these numbers. A monthly financial review using your accounting software (FreshBooks, QuickBooks, or Xero) and a simple spreadsheet is enough for most small businesses.
Set a recurring calendar appointment — the first Monday of every month — to calculate and review all six metrics. A business that knows its numbers can course-correct early. A business that doesn't discovers problems only when they become crises.
The bottom line
You cannot manage what you don't measure. These six metrics tell you whether your business is healthy, sustainable, and scaling in the right direction — or whether problems are building beneath the surface that revenue growth is temporarily hiding.
Know your numbers. Review them monthly. Act on what they tell you.