SaaS Metrics to Track After Launch, and Which to Ignore
After launch, a small SaaS needs five metrics: where signups come from, activation (how many reach the first useful result), MRR, churn and retention. Track them in a simple sheet, most of them weekly. Leave LTV and CAC payback for later, because with a few dozen customers those numbers swing too much to mean anything.
Why do new founders track the wrong SaaS metrics?
Every SaaS metrics guide lists twenty numbers. You set up a dashboard with all of them, check it every morning, and still can’t say what to work on this week.
That’s the cost: time spent watching numbers that can’t move yet, while the one that matters (people signing up and never coming back) goes unfixed. Early on, a metric is only useful if it tells you what to do next.
Which SaaS metrics matter in the first months?
| Metric | What it tells you | Formula | Check it |
|---|---|---|---|
| Signups by source | Which channels bring people | Signups per channel (from UTM tags or a “how did you hear about us” field) | Weekly |
| Activation rate | Whether onboarding works | Users who reach the first useful result ÷ signups | Weekly |
| MRR | Whether recurring revenue grows | Sum of active subscriptions’ monthly amounts | Monthly, glance weekly |
| Customer churn | Whether paying customers stay | Customers lost in the month ÷ customers at the start of the month | Monthly |
| Retention | Whether users come back | Share of a signup week’s users still active after 1, 4 and 8 weeks | Monthly |
Signups by source
Tag every link you share during a launch, because without tags every visitor looks like direct traffic. A launch platform that sends ten users who stay beats one that sends a hundred who leave. Our SaaS launch checklist covers setting this up before launch day.
Activation rate
Pick one action that means “this person got value”: created their first project, connected their data, sent their first invoice. Count how many signups reach it. A low activation rate is a common early leak. It’s also fixable in the product, which makes it a good place to spend a week.
MRR
Monthly recurring revenue: what your active subscriptions bring in each month, with yearly plans divided by 12. What is MRR explains the formula and what to leave out.
Churn
Count customers who cancel, not just revenue, because a few large accounts can hide many small ones leaving. With a small base, one cancellation is a big percentage, so look at the reasons more than the rate. Ask everyone who leaves one question: what made you stop?
Retention
Group users by the week they signed up and see how many are still active later. If each week’s line flattens instead of dropping to zero, some people found lasting value. How to keep users after launch covers what to do when it doesn’t.
Which SaaS metrics can wait?
- LTV (lifetime value). It needs a stable churn rate, which you won’t have with a few dozen customers.
- CAC and CAC payback. Useful once you pay for acquisition at scale. If your marketing is mostly your own time, track hours instead.
- ARR. It’s MRR × 12. It makes a small number look bigger, not clearer.
- Net revenue retention. Meaningful once enough customers have upgraded or downgraded.
- Vanity totals. All-time signups and page views only go up, so they never tell you anything is wrong.
How do you track SaaS metrics without a data team?
A spreadsheet is enough, because at this stage you need a habit more than a tool. One row per week, one column per metric, and a short note on what changed that week (a launch, a new onboarding step, a price change). The notes are what make the numbers readable a month later.
Your billing provider has MRR and churn. Activation and retention come from your own database or product analytics.
How does LaunchGP use these numbers?
On LaunchGP, products race a weekly Grand Prix and then join LaunchGP Endurance, a permanent race that rewards consistency. Two of the metrics above show up there:
- Verified MRR sets your class. With a Stripe restricted key that can only read subscriptions, cars race as Rookie (up to $100 or no key), GT (up to $1k), Prototype (up to $10k) or Hypercar (over $10k). The page shows your class, not your number. How to verify MRR shows how to create the key.
- Traffic and activity move the car. Visitors who click through from LaunchGP and updates you log as pit stops add pace each day.
Season Pass and Month Pass holders also get traffic telemetry for every product they race, which helps with the “signups by source” column. Passes are $199 for six reserved seats in a season or $99 for two in a month.
What’s the next step?
Open a sheet with the five columns above and fill in this week. Then bring some new signups into it, because a metric with no new users can’t move.
A seat is free with the LaunchGP badge, and a front slot starts at $9.
Get your seat in the next Grand Prix
FAQ
What are the most important SaaS metrics?
For an early product, start with activation and retention, then MRR and churn, plus where signups come from. Later, add LTV, CAC and net revenue retention.
How do you calculate churn rate?
Divide the customers who canceled during the month by the customers you had at the start of it. 2 cancellations out of 40 customers is 5% monthly churn.
What is a good churn rate for a new SaaS?
It depends on price and customer type, and with a small base the rate jumps around. Compare your own months and read the reasons people give when they leave.
How often should I check SaaS metrics?
Weekly for signups and activation, monthly for MRR, churn and retention. Daily checks mostly show noise.
What is activation in SaaS?
The moment a new user gets the first useful result from your product. You define it, and the activation rate is the share of signups who reach it.