By Dean O'Meara · Founder, Wrapt
You can't improve what you don't measure. But most early-stage founders either track nothing or track everything — both of which lead to the same outcome: poor decisions. This guide covers the SaaS metrics that actually matter, with formulas you can use today and benchmarks to tell you whether you're on track. No fluff, no vanity metrics. Just the numbers that investors, operators, and successful founders pay attention to.
Revenue is the foundation of every SaaS business, and the way you measure it matters. Monthly Recurring Revenue (MRR) is the single most important number for any subscription business. It tells you how much predictable revenue you generate each month from active subscriptions. The formula is straightforward:
Annual Recurring Revenue (ARR) is simply MRR × 12. It's the metric investors use when talking about company scale. A company doing $83K MRR is a $1M ARR business — that framing matters when you're fundraising.
Average Revenue Per User (ARPU) tells you how much each customer is worth on a monthly basis. Track it over time — if ARPU is rising, your pricing or upsell strategy is working. If it's flat or declining, you may be attracting lower-value customers or discounting too aggressively.
Benchmark: ARPU varies wildly by market. Self-serve SaaS tools typically see $20–$100/month. SMB products range from $100–$500/month. Enterprise SaaS can exceed $5,000/month per account.
Raw revenue means nothing without context. Month-over-month (MoM) growth rate tells you whether you're accelerating, coasting, or stalling. The formula:
Benchmark: Early-stage SaaS companies should aim for 15–20% MoM growth. Post-Series A, 10–15% is strong. At scale (over $10M ARR), even 5–7% MoM is impressive. YC famously tells founders to target 5–7% weekly growth during the batch.
Net New MRR breaks your revenue growth into its components so you can see what's driving changes:
This decomposition is critical. A company growing 10% MoM by acquiring new customers while losing 8% to churn has a fundamentally different business from one growing 10% with minimal churn. Net New MRR reveals the real story behind headline growth numbers.
Churn is the silent killer of SaaS businesses. It compounds against you the same way growth compounds for you — except in the wrong direction. There are two types you need to track: customer churn and revenue churn.
Benchmark: Good SaaS churn is under 5% monthly for SMB-focused products and under 1% monthly for enterprise. Annual churn below 10% is considered excellent across the board. If your monthly churn exceeds 7–8%, you have a retention crisis that no amount of acquisition spend will fix.
Net Revenue Retention (NRR), sometimes called Net Dollar Retention (NDR), is arguably the most important metric for a scaling SaaS company. It measures how much revenue you retain and expand from your existing customer base, excluding new customers entirely:
Benchmark: An NRR above 100% means your existing customers are spending more over time — even without adding a single new customer, your revenue grows. Best-in-class SaaS companies (Snowflake, Datadog, Twilio at peak) have NRR above 130%. For SMB SaaS, 90–100% is healthy. For mid-market and enterprise, 110–130% is the target.
Unit economics answer a simple question: does it cost you more to acquire a customer than that customer is worth? Customer Acquisition Cost (CAC) measures the total cost of winning a new paying customer:
Include everything: ad spend, salaries for your sales team, tools, content production costs, and agency fees. Founders routinely undercount CAC by excluding headcount — don't make that mistake.
Lifetime Value (LTV) estimates the total revenue you'll earn from a customer over the entire relationship:
For example, if your ARPU is $50/month and your monthly churn rate is 5%, your LTV is $50 / 0.05 = $1,000. That means the average customer will pay you $1,000 before they cancel.
The LTV:CAC ratio brings it all together:
Benchmark: A healthy LTV:CAC ratio is 3:1 or higher — meaning each customer generates at least three times what it cost to acquire them. Below 1:1, you're losing money on every customer. Between 1:1 and 3:1, the economics are tight and fragile. Above 5:1, you're likely under-investing in growth and leaving money on the table. Also track CAC payback period — the number of months it takes to recoup your acquisition cost. Under 12 months is the target; under 6 is excellent.
Revenue metrics tell you what happened. Engagement metrics tell you what's about to happen. If usage drops before churn spikes, you have a window to intervene — but only if you're tracking the right signals.
The DAU/MAU ratio measures what percentage of your monthly users are active on any given day. It's a proxy for how "sticky" your product is:
Benchmark: A DAU/MAU ratio above 20% is good for most SaaS products. Above 40% is exceptional and typically reserved for communication tools (Slack, Teams) or daily workflow products. B2B tools used weekly might sit around 10–15% and that's perfectly fine if the use case doesn't demand daily interaction.
Activation rate measures what percentage of new signups reach your product's "aha moment" — the point where they experience core value for the first time. This is unique to every product: for a project management tool, it might be creating a second project; for an analytics tool, it might be setting up a dashboard. You need to define your own activation event and track conversion to it.
Feature adoption tracks which features your customers actually use. Most SaaS products have a long tail of features that almost nobody touches. Understanding which features correlate with retention helps you prioritize your roadmap. If customers who use Feature X have 50% less churn, that's the feature you should be guiding new users toward.
Not every metric matters equally at every stage. Tracking the wrong numbers at the wrong time leads to misguided priorities. Here's what to focus on depending on where you are.
Pre-revenue (0 to first 10 customers): Forget about CAC and LTV — your sample size is too small for these to be meaningful. Focus on activation rate, qualitative feedback, and whether people come back without being asked. Track signups, activation events, and weekly active usage. The goal at this stage is to find your first 100 users who genuinely need what you're building.
Post-product-market fit ($10K–$100K MRR): Now your numbers start to matter. Track MRR, MoM growth rate, customer churn, and NRR closely. Start measuring CAC by channel so you know where your best customers come from. Monitor expansion revenue — are existing customers upgrading? This is the stage where retention becomes the priority. If churn is above 5% monthly, fix that before pouring money into acquisition.
Scaling ($100K+ MRR): Everything compounds at this stage, both good and bad. Track the full suite: ARR, NRR, LTV:CAC ratio, CAC payback period, gross margin, and burn multiple. Segment your metrics by cohort, plan tier, and acquisition channel. A blended 3:1 LTV:CAC might hide the fact that one channel is 10:1 and another is 0.5:1. The founders who win at this stage are the ones who understand their numbers at a granular level — and make allocation decisions accordingly.