There is an entire industry built around SaaS metrics. Thousands of blog posts, hundreds of dashboards, dozens of frameworks, all telling you the forty seven numbers you absolutely must track to build a successful software business. Most of it is written by people with VC money who have very different priorities to someone like me.
I run two SaaS businesses. Crocodile, which is HR software, and CampSuite, which is campsite management software. Both are bootstrapped. I have never taken outside investment. Everything is funded from revenue and my own pocket. When you are in that position, the metrics you care about are fundamentally different from a VC backed startup chasing hockey stick growth at all costs.
Here are the numbers I actually look at, why they matter, and what I have learned about each of them the hard way.
Monthly Recurring Revenue is the only revenue number that matters
MRR. Monthly Recurring Revenue. This is the total amount of money you can reliably expect to receive every single month from your subscriptions. Not annual contracts divided by twelve. Not projected revenue. Actual, confirmed, money hitting your bank account every month recurring revenue.
When you are bootstrapped, MRR is everything. It is the number that tells you whether you can pay your costs, whether you can hire, whether you can invest in growth, whether you can sleep at night. Everything else flows from MRR.
I track MRR daily across both Crocodile and CampSuite. Not because I am obsessive, although I might be, but because the trend matters as much as the number. Is it going up? Going down? Flat? The direction tells you more than the absolute figure. Flat MRR for three months is not neutral, it is a warning sign. It means you are losing customers as fast as you are gaining them, and that needs investigating.
One thing I have learned is to be very precise about what counts as MRR. Only count revenue from customers who are on recurring plans and are actually paying. Do not count trials, do not count one off setup fees, do not count annual contracts that have not renewed yet. Be ruthlessly honest with this number because it is the foundation everything else is built on.
Churn will quietly destroy you
Customer churn is the percentage of customers who cancel their subscription in a given period. Revenue churn is the percentage of MRR you lose. They are related but not the same, and you should track both.
For a bootstrapped SaaS business, churn is the most dangerous metric because it is invisible until it is a crisis. If you are adding ten customers a month and losing eight, your MRR might still be growing, but you are running on a treadmill and it is going to catch up with you.
At Crocodile, we obsess over churn. Every cancellation gets a personal follow up. Not an automated email. An actual conversation. Why did they leave? What could we have done differently? Was it a product issue, a service issue, a pricing issue or did they simply close their business? That qualitative data is worth more than any dashboard.
What I have found is that most churn in small to medium SaaS is caused by one of three things. The customer never properly onboarded and never got real value from the product. The customer's needs changed and the product did not evolve with them. Or the customer found something cheaper. The first one is fixable. The second one is fixable. The third one is a strategic problem.
For a bootstrapped SaaS business, a monthly churn rate above three percent is a serious concern. Above five percent and you have a fundamental product or market fit problem. Below two percent and you are in good shape. Below one percent and you are doing exceptionally well.
I also track what I call "logo churn" versus "revenue churn" because they tell different stories. If you lose ten small customers but gain two large ones, your logo churn looks terrible but your revenue churn might be fine. That distinction matters when you are making decisions about where to focus.
Customer Acquisition Cost: know what a customer costs you
CAC is how much you spend, on average, to acquire a new customer. Take your total sales and marketing spend for a period and divide it by the number of new customers you gained in that period. Simple in theory. Messy in practice.
When you are bootstrapped, CAC matters because every pound you spend on acquiring a customer is a pound that is not going towards product development, support or your own salary. There is no investor writing cheques to cover a blitz scaling acquisition strategy. You need to know exactly what a customer costs you and whether that cost makes sense.
For CampSuite, our primary acquisition channels are organic search, word of mouth and the occasional bit of targeted advertising. I track the CAC for each channel separately because the numbers are wildly different. Organic search has basically zero marginal cost. A customer who comes through Google costs us nothing beyond the content and SEO work we already do. A customer who comes through paid advertising might cost fifty to a hundred pounds depending on the campaign.
The mistake I see a lot of bootstrapped founders make is not accounting for their own time. If you spend twenty hours a month doing sales calls, that has a cost. If you spend ten hours writing blog posts for content marketing, that has a cost. Your time is not free, even if you are not paying yourself for it. Be honest about the true cost of acquisition.
I also track time to payback, which is how many months of subscription revenue it takes to recover the acquisition cost of a customer. For a bootstrapped business, you want this under six months. Under three is excellent. If it takes more than twelve months to pay back a customer's acquisition cost, you have a problem because you are essentially financing every new customer out of your own pocket for a year before they become profitable.
Lifetime Value: what is a customer actually worth?
LTV is the total revenue you can expect from a customer over the entire time they stay with you. The simplest way to calculate it is average monthly revenue per customer divided by your monthly churn rate. If your average customer pays a hundred pounds a month and your monthly churn is two percent, your LTV is five thousand pounds.
The reason LTV matters for bootstrapped businesses is that it tells you how much you can afford to spend on acquisition. The standard rule of thumb is that your LTV should be at least three times your CAC. If it is less than that, you are spending too much to acquire customers relative to what they are worth. If it is more than three times, you have room to invest more in growth.
What I have learned is that LTV is not a fixed number. It changes as your product improves, as your pricing evolves and as your customer base matures. When Crocodile was new, our LTV was relatively low because we had higher churn. People were trying us out and some were leaving. As the product matured and we got better at onboarding, churn dropped and LTV increased significantly.
I also track LTV by customer segment because not all customers are created equal. Enterprise customers tend to have much higher LTV than small business customers, not just because they pay more per month, but because they churn much less. Once a large organisation has implemented your software across their team, the switching cost is high and they tend to stay. Understanding which segments have the highest LTV helps you focus your acquisition efforts where they matter most.
What I deliberately do not track
Here is the bit that might be controversial. There are a bunch of metrics that the SaaS industry considers essential that I either do not track at all or only glance at occasionally.
I do not obsess over monthly active users. If customers are paying and not churning, I do not particularly care how often they log in. Some of our Crocodile customers only use the system heavily at payroll time and that is absolutely fine. Usage metrics can be useful for product development, but they are not a business health indicator for us.
I do not track Net Promoter Score. I know, heresy. But I have found that direct conversations with customers tell me far more than a numerical score ever could. When a customer is unhappy, they tell us. When they are happy, they refer other people. That is all the feedback loop I need.
I do not worry about total addressable market or serviceable addressable market or any of the market sizing exercises that VCs love. My markets are niche. I know they are niche. That is deliberate. I would rather own a significant share of a small market than a tiny share of a massive one. The SaaS economics work better that way for a bootstrapped business.
I do not benchmark against VC backed competitors. Their metrics are not comparable to mine. They are burning cash to grow fast and will worry about profitability later. I need to be profitable now because there is no later funding round coming. Comparing my growth rate to theirs is meaningless and demoralising.
The one metric that ties it all together
If I had to pick one single number that tells me whether a bootstrapped SaaS business is healthy, it would be net revenue retention. This is the percentage of revenue from your existing customers that you retain from one period to the next, including expansions and contractions.
If your net revenue retention is above a hundred percent, your existing customers are spending more over time. That means your business grows even if you stop acquiring new customers. That is an incredibly powerful position for a bootstrapped business because it means growth is compounding rather than linear.
At Crocodile, we achieve this through natural expansion. As a company grows and adds employees, they move to a higher pricing tier. We do not need to upsell them aggressively. The growth happens naturally because our pricing is aligned with their growth. Getting your pricing model right so that net revenue retention is naturally above a hundred percent is one of the smartest things a bootstrapped SaaS founder can do.
Keep it simple and stay honest
The best advice I can give a bootstrapped SaaS founder about metrics is to keep it simple and stay brutally honest. Track MRR, churn, CAC, LTV and net revenue retention. Look at them regularly. Understand the trends. Act on what they tell you, even when it is uncomfortable.
Do not hide behind vanity metrics. Do not count things that make you feel good but do not actually mean anything. Do not compare yourself to VC backed companies with completely different economics. And do not spend so long building dashboards that you forget to build your actual product.
Your metrics should fit on one page. If they do not, you are tracking too much. And if you are not tracking anything at all, start today. Because the difference between a bootstrapped SaaS business that survives and one that does not is almost always whether the founder was paying attention to the right numbers.
