The first business I ran, I tracked exactly one metric: revenue. Money came in, I felt good. Money slowed, I panicked. I had no idea why revenue fluctuated, which customers were profitable, or how long my cash would last. I was flying blind and calling it entrepreneurship.
It took a near-death cash crunch — the kind where you’re calculating whether you can make payroll next Friday — to force me into learning financial metrics properly. What I discovered is that most entrepreneurs track too many metrics (vanity dashboards with 30 KPIs) or too few (just revenue, like I did). The sweet spot is a small set of metrics that tell you different things about different aspects of your business health.
These seven metrics are the ones I now check weekly in every business I run or advise. They’re not exhaustive, but together they give you a complete picture: how much you’re making, how efficiently you’re making it, how long you can survive, and whether your unit economics actually work.
Key Takeaways
- Revenue tells you how much money is coming in, but without context from the other six metrics, it can be deeply misleading
- The CAC-to-LTV ratio is the single most important unit economics metric — aim for at least 3:1
- Gross margin reveals whether your business model is fundamentally viable before overhead costs
- Runway (not burn rate alone) is what determines how much time you have to figure things out
1. Revenue (And Why It’s Not Enough By Itself)
Revenue is the most visible metric and the most dangerous one to celebrate in isolation. I’ve watched companies with impressive revenue growth go bankrupt because they were losing money on every transaction and making it up in volume — which, as the old joke goes, doesn’t actually work.
What to actually track:
Monthly Recurring Revenue (MRR) if you have a subscription model. This is the most predictable form of revenue and the one investors value most highly. Track net new MRR (new customers minus churned customers) to see whether your revenue base is growing or eroding.
Revenue by source. Know which channels, products, and customer segments generate your income. When I finally broke our revenue down by acquisition channel, I discovered that 60% of our profit came from one channel that received 20% of our marketing budget. That insight alone changed our allocation and doubled our growth rate.
Revenue growth rate. Month-over-month and year-over-year. The absolute number matters, but the trajectory matters more. Consistent 8% monthly growth compounds into nearly 2.5x annual growth.
The mistake I made: Treating all revenue equally. A $10,000 contract that costs $8,000 to fulfill is worth less than a $5,000 contract that costs $500 to fulfill. Revenue without margin context is vanity.
2. Customer Acquisition Cost (CAC)
CAC tells you how much you spend to acquire each new customer. The formula: total sales and marketing spend divided by the number of new customers acquired in that period.
The calculation most people get wrong: They include only advertising spend. Real CAC includes everything: ad spend, sales team salaries, marketing tools, content production, event costs, and the portion of your time spent on sales and marketing. When I included my own time (valued at what I’d pay someone else to do it), our CAC nearly doubled from what I’d been reporting.
What good looks like: CAC varies enormously by industry. A B2B SaaS company might spend $200-500 to acquire a customer. An e-commerce business might spend $20-80. A consulting firm might spend $2,000-5,000. The number itself doesn’t tell you much — you need to compare it to LTV.
How to reduce CAC:
Improve conversion rates at each stage of your funnel. A 10% improvement in conversion from lead to customer reduces CAC by 10%, regardless of what you spend on advertising.
Double down on channels with the lowest CAC. Measure CAC by channel, not just in aggregate. Your average CAC might be $300, but if organic search customers cost $50 and paid social customers cost $600, you know where to invest.
Increase referrals. Referred customers typically have a CAC near zero and higher retention. Building a referral mechanism is one of the highest-leverage things you can do.
3. Customer Lifetime Value (LTV)
LTV estimates how much total revenue a customer will generate over their entire relationship with your business. It’s the counterpart to CAC, and together they form the most important ratio in your business.
The basic formula: Average Revenue Per Customer × Average Customer Lifespan.
For subscription businesses: Monthly Revenue Per Customer × Average Months Before Churn.
For transaction businesses: Average Order Value × Purchase Frequency × Average Customer Lifespan.
Example: If a SaaS customer pays $100/month and stays for an average of 30 months, their LTV is $3,000. If it costs $800 to acquire them (CAC), the LTV:CAC ratio is 3.75:1. That’s healthy.
The ratio that matters: LTV:CAC should be at least 3:1. Below 3:1, you’re spending too much to acquire customers relative to what they’re worth. Above 5:1, you might actually be under-investing in growth — you could afford to spend more on acquisition and grow faster.
Where entrepreneurs get this wrong: They calculate LTV using optimistic assumptions. They assume customers will stay for years when actual data shows average retention of 8 months. Use real data, not projections. And recalculate quarterly, because LTV changes as your product, pricing, and customer mix evolve.
4. Gross Margin
Gross margin is the percentage of revenue remaining after subtracting the direct costs of delivering your product or service. The formula: (Revenue – Cost of Goods Sold) ÷ Revenue × 100.
Why it matters more than revenue: Gross margin reveals whether your business model is fundamentally viable. A business with $1M in revenue and 20% gross margin has $200K to cover all operating expenses. A business with $500K in revenue and 70% gross margin has $350K. The smaller business is in a stronger position.
Benchmarks by business type:
SaaS companies: 70-85% gross margin is typical and expected. Below 60% suggests infrastructure costs are too high.
Service businesses: 50-70% is healthy. Below 40% usually means you’re underpricing or overstaffing.
E-commerce (physical products): 30-50% is common. Below 25% makes it very difficult to build a sustainable business after marketing and overhead.
What I learned the hard way: Gross margin should improve over time as you gain efficiencies of scale. If yours is flat or declining as revenue grows, something is structurally wrong — usually your costs are scaling linearly with revenue when they shouldn’t be.
5. Burn Rate
Burn rate is how much cash your company spends per month beyond what it earns. There are two versions:
Gross burn rate: Total monthly operating expenses. This tells you what it costs to keep the business running regardless of revenue.
Net burn rate: Monthly expenses minus monthly revenue. This is the more useful number because it shows how much cash you’re actually consuming.
Example: If you spend $80,000/month and earn $50,000/month, your net burn rate is $30,000/month. You’re consuming $30K in cash reserves each month to keep operating.
When burn rate is acceptable: Early-stage companies are expected to burn cash while they build their product and find product-market fit. The question isn’t whether you’re burning — it’s whether what you’re burning is producing growth. A company burning $50K/month with 20% monthly revenue growth is in a fundamentally different position than one burning $50K/month with flat revenue.
The danger sign: When burn rate increases but growth metrics don’t improve proportionally. That means you’re spending more without getting more. I’ve seen this happen most often when companies hire aggressively before their sales process is proven.
6. Runway
Runway is how many months your business can survive at its current burn rate before running out of cash. The formula: Cash on Hand ÷ Net Monthly Burn Rate.
Example: $300,000 in the bank ÷ $30,000 net monthly burn = 10 months of runway.
This is the metric that forces honesty. Revenue is encouraging. Growth rates are exciting. Runway is sobering. It tells you exactly how much time you have to make things work.
Minimum comfortable runway: 12-18 months if you’re venture-funded. 6-12 months if you’re bootstrapped (because you can adjust spending more quickly). Below 6 months, you should be in emergency mode — either raising capital, cutting costs, or accelerating revenue.
What most entrepreneurs miss: Runway isn’t static. It changes every month as your burn rate and revenue change. I calculate runway on the first of every month and project it forward under three scenarios: optimistic (revenue grows as planned), realistic (revenue grows at half the planned rate), and pessimistic (revenue stays flat). The pessimistic scenario is the one that determines my actual decisions.
The fundraising math: If you need to raise money, start the process when you have 6-9 months of runway remaining. Fundraising typically takes 3-6 months. Starting at 3 months of runway means you’re negotiating from desperation, which investors can smell.
7. Cash Flow
Cash flow is the actual movement of money in and out of your business within a specific period. It’s different from revenue (which can be recognized before cash arrives) and different from profit (which doesn’t account for timing).
Why cash flow matters separately from profit: A business can be profitable on paper and still run out of cash. This happens when customers pay slowly (net-60 terms), when you have to pay suppliers before you collect from customers, or when seasonal swings create gaps between expenses and income.
I learned this distinction painfully. My business showed a $40K profit for the quarter while simultaneously having $12K in the bank because two major clients were 60 days late on payments. Profit said we were fine. Cash flow said we might miss payroll.
The three types to monitor:
Operating cash flow: Cash generated by your core business operations. This should be positive and growing over time. Negative operating cash flow means your business doesn’t generate enough cash to sustain itself, regardless of what the income statement says.
Investing cash flow: Cash spent on assets (equipment, technology, acquisitions). This is typically negative for growing businesses, and that’s fine — as long as those investments generate future operating cash flow.
Financing cash flow: Cash from fundraising, loans, or investor distributions. This fills the gap between what your business generates and what it needs.
The weekly practice: I check our cash position every Monday morning. Not monthly, not when the bank statement arrives — weekly. Knowing exactly how much cash you have, when the next major expenses hit, and when you expect receivables to arrive gives you the ability to make decisions before they become emergencies.
Putting It All Together
These seven metrics form a complete picture when read together:
Revenue tells you how much money is coming in. Gross margin tells you how much of that money you actually keep after direct costs. CAC and LTV tell you whether your customer economics work. Burn rate and runway tell you how long you can sustain current operations. Cash flow tells you whether the timing of money movement is manageable.
No single metric tells the full story. A company with amazing revenue growth but terrible gross margins is building on sand. A company with great margins but declining revenue is slowly dying. A company with perfect unit economics but three months of runway is about to run out of time.
Build a simple dashboard — a spreadsheet is fine — and update these seven numbers weekly. The discipline of looking at all seven together, rather than cherry-picking whichever one looks best, is what separates entrepreneurs who survive from those who are surprised by failure.