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5 Key Metrics for your Lean Start Up

Have you got a lean startup? There are no limit of metrics you can use to measure your lean startup's progress. Here are some of the most common ones that you'll want to start tracking right away.


To remain fiscally viable in the long term, you'll need to have a solid operating business model. Once you do start bringing in revenue, you need to make sure it doesn't cost too much to keep bringing in new customers. Customer acquisition cost can kill you at every stage of business development. How do you measure customer acquisition cost? You can use a mathematical model to estimate it if you're early on and don't have a lot of data. If you've got the following actual data, you can calculate customer acquisition cost:

Number of new customers per month

Costs to develop product/service

Estimated life of product/service

Monthly marketing costs

Monthly maintenance costs

Customer acquisition cost can change over time, due to rolling out new products and services, streamlining or complicating operations. Make sure to reevaluate it on a regular basis to see if you are still on target.


One of the wonderful things about a lean startup is the short product development cycles and iterative product releases. That same excitement can be a killer in the marketplace. Customers who have adopted your business model early on may be completely turned off by a subsequent product release, and others could be engaged. What you really need to measure is your customer retention rate. That way, you'll know when you've reached a sustainable point where customers perceive a value and are willing to continue to pay.

Measuring customer retention is relatively straightforward. With all the different advertising channels out there, you should track the retention of those customers you engaged using different media approaches. Then you can better target future advertising dollars. Quarterly measurement of customer retention is a good place to start so that it coincides with quarterly financial earnings reports. Beware that customer retention is a lagging indicator, so once you see it drop, you probably should have made a business change several months ago!


Viral reach is how many you've engaged via social media outlets like Facebook, Instagram, and Twitter. Social media is great advertising when done right, and growth rates for viral reach vary widely. If your reach metrics look good, then maybe it's time to tease apart the quality of those connections to see how valuable they really are. Don't be discouraged if you have slower viral growth but more relevance. But you should be concerned if you have rapid viral growth without quality participators.


Turnover or churn rate is a metric that measures how rapidly your lean startup is losing team members or customers. When used as an internal metric, turnover needs to be assessed to see if it's an expected, natural part of the startup's evolution, or a sign of something deeper. When faced with high customer churn rate, you might look at whether you can recoup some of those lost costs by upselling to the lost customers or cross-promoting other products and services.


You're probably most familiar with revenue as a metric, but you may be focusing so much on whether you're turning a profit to realize if your revenue metric is looking good! Operations and maintenance costs can vary widely for the first few years of a lean startup, so make sure to focus on revenue, not just overall profit. If revenue looks good, then you'll need to seriously work on reducing your operations cost.

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