6.3 Measuring Success
Key Metrics to Track:
Choosing the right metrics is crucial to steer the company. Most startups track a blend of financial metrics and customer metrics:
Financial Metrics: These show fiscal health. Track Monthly Recurring Revenue (MRR) if you have subscription revenue, or simply monthly sales revenue if not. Also measure Net Profit Margin (the percentage of sales that turns into profit), and Gross Margin (how much revenue exceeds cost of goods sold). A stable or improving profit margin means your growth is sustainable. Keep an eye on Burn Rate (cash spent per month) and Runway (months of cash left)– you don’t want to suddenly run out of money. Typically investors like to see a runway of 12–18 months at any time.
Customer/Engagement Metrics: These gauge market traction. Customer Acquisition Cost (CAC) is the cost to get one new customer (sum of sales/marketing spend divided by number of new customers). Customer Lifetime Value (LTV) is how much revenue you earn from a customer over the entire relationship. For a healthy model, LTV should be several times your CAC. Also track Churn Rate (percentage of customers lost in a period) or Retention Rate, since retaining customers is often cheaper than acquiring new ones. Other key numbers might include activation/engagement (e.g. daily active users, session length) for a consumer app, or net promoter score (NPS) to gauge satisfaction.
The North Star Metric is the single key measure that reflects your product’s core value. It aligns the team on one ultimate goal. For example, an e-commerce startup might choose “monthly active users” or “gross merchandise value,” a SaaS company might pick MRR growth, and a social app might pick “time spent by users.” This metric should be tied to long-term customer value. Supporting metrics (like retention rate, conversion rate, etc.) feed into the North Star. By focusing on one guiding metric, all departments can prioritize the actions that move the needle most.