SaaS Growth Metrics Explained For Founders
Understanding growth is one of the most important — and often misunderstood — parts of building a SaaS company.
Many founders focus on top-line growth alone. Revenue is increasing, users are growing, and everything appears to be working. To truly assess and drive success, founders must focus on key SaaS metrics—essential performance indicators that reveal the health and growth potential of a SaaS business.
But sustainable growth in SaaS is not just about how fast you grow. It’s about how efficiently and predictably that growth happens.
SaaS growth metrics are considered core metrics for evaluating SaaS business performance, helping founders understand whether their business is truly scaling — or simply expanding without strong underlying fundamentals.
SaaS growth metrics explained
Why Growth Metrics Matter
Growth metrics provide visibility into how a business is performing beneath the surface.
They help answer critical questions:
Is growth sustainable?
Are customers staying or leaving?
Is revenue compounding over time?
Is growth becoming more efficient or less efficient?
These are the same questions investors ask when evaluating startups, which is why growth metrics—often referred to as key performance indicators (KPIs)—form a core part of how investors and operators assess companies alongside factors like team, market size and scalability.
For founders, understanding these metrics early allows for better decision-making across product, pricing and growth strategy. Tracking the right critical metrics is essential to ensure long-term business success.
Core SaaS Growth Metrics
Here are some of the important SaaS metrics that define how a SaaS business grows. Understanding and tracking these SaaS metrics is essential for every founder.
Annual Recurring Revenue (ARR)
ARR is the primary metric used to measure the scale of a SaaS business.
ARR provides a clear view of:
current revenue scale
growth over time
overall business trajectory
It represents the annualised value of all active subscriptions. ARR is often calculated based on the value of each annual contract a company has with its customers.
Annual contract value (also known as annual contract value (ACV)) is the average yearly revenue generated from each annual contract, and is a key input for calculating ARR. ACV helps SaaS businesses benchmark performance and compare customer value across different contracts.
It is often one of the first metrics investors look at when evaluating a company, particularly when assessing overall startup performance.
Monthly Recurring Revenue (MRR)
MRR is the monthly equivalent of ARR and is considered one of the most important revenue metrics for SaaS companies.
It provides a more granular view of growth and is particularly useful for tracking short-term trends.
MRR allows founders to:
monitor growth momentum
identify changes quickly
track the impact of pricing or product changes
track average revenue per account or user
Together, ARR and MRR form the foundation of SaaS financial metrics and are critical for understanding how subscription businesses operate. Subscription revenue forms the basis for calculating both MRR and ARR, making it essential for assessing business performance and revenue predictability.
Net Revenue Growth
Net revenue growth, a key growth rate metric for SaaS businesses, measures how total recurring revenue is changing over time.
It incorporates:
new revenue
expansion revenue
churned revenue
Net dollar retention is commonly used to measure revenue growth from existing customers by tracking how much recurring revenue is retained and expanded over a 12-month period.
This gives a more complete picture of growth than simply looking at new customer acquisition.
Strong SaaS businesses typically demonstrate consistent net revenue growth driven by both new and existing customers. Tracking customer revenue is essential to understand the drivers behind net revenue growth and to identify opportunities for improving retention and expansion.
Churn Rate
Churn measures how many customers or how much revenue is lost over a given period. The customer churn rate is defined as the percentage of customers lost during a specific period, and is a critical metric for understanding customer retention and overall business health in SaaS companies.
There are two main types:
Customer churn — percentage of customers who leave
Revenue churn (also known as revenue churn rate) — percentage of revenue lost
Customer turnover is another term for customer churn, and it measures the rate at which customers leave over a specific period.
Churn is one of the most important indicators of product quality and customer satisfaction. Tracking the number of customers lost helps identify areas for improvement and can reveal underlying issues with customer experience or product fit.
If churn is high, it often signals that the business has not fully achieved product-market fit, even if growth appears strong on the surface.
Net Revenue Retention (NRR)
NRR measures how revenue from existing customers changes over time, including expansion and churn. It specifically tracks revenue from the same customers over a given period, showing how well a business retains and grows its customer base.
It is calculated by looking at:
starting revenue
plus expansion
minus churn
NRR above 100% means the business is growing revenue from existing customers, even before adding new ones.
This is one of the strongest indicators of a high-quality SaaS business, and NRR is considered one of the most important retention metrics for SaaS companies.
Customer Acquisition Cost (CAC)
CAC measures how much it costs to acquire a new customer.
It typically includes:
marketing spend
sales costs
marketing expenses
sales and marketing
marketing efforts
Understanding CAC is critical when scaling growth, as it determines how efficiently new customers are being acquired. CAC is calculated by dividing total sales and marketing costs by the number of customers acquired in a period.
CAC is most powerful when analysed alongside lifetime value, which is explored in more detail in CAC vs LTV explained for SaaS companies.
Optimising your customer acquisition strategy is essential to improve CAC and drive sustainable SaaS growth.
Customer Lifetime Value (LTV)
LTV is the total revenue a business can estimate that it will generate from a customer over their lifetime, representing how much value each customer generates for the company.
It is influenced by:
pricing
retention
product usage
customer segments
The relationship between CAC and LTV determines whether growth is sustainable, and forms the foundation of strong SaaS unit economics.
CAC Payback Period
This measures how long it takes to recover the cost of acquiring a customer.
Shorter payback periods:
improve cash flow
reduce capital requirements
enable faster scaling
A shorter CAC payback period is also a strong indicator of marketing efficiency, showing that your company is effectively converting marketing spend into revenue growth.
This metric becomes particularly important when managing capital efficiency and planning for fundraising.
Growth vs Efficiency
One of the most important concepts in SaaS is the balance between growth and efficiency. The way a SaaS company's business model is structured directly impacts its growth trajectory, operational efficiency, and ability to scale profitably.
Rapid growth alone is not enough. If growth is driven by excessive spending or poor retention, it may not be sustainable.
This is where metrics like CAC, LTV and churn become critical. These metrics reflect the company's ability to generate and retain recurring revenue, which is essential for sustainable growth.
They provide context behind growth and help founders understand whether the business is scaling in a healthy way. Gross margin is also a key indicator of profitability and efficiency in SaaS businesses, as it measures how much revenue remains after accounting for the direct costs of delivering the service.
This dynamic is closely tied to broader financial concepts such as burn rate and runway, which determine how long a company can sustain its current growth strategy. Monitoring financial health and working towards positive cash flow are crucial for ensuring long-term success and stability.
How Metrics Work Together
SaaS growth metrics should not be viewed in isolation. They are interconnected.
For example:
High churn reduces LTV
Lower LTV impacts CAC efficiency
Poor CAC efficiency increases burn rate
Increased burn reduces runway
Understanding these relationships is essential for making strategic decisions.
The most effective founders don’t just track metrics — they understand how those metrics interact. Selecting the right SaaS metrics for your business stage and goals is critical to accurately assess company health and guide growth. Continuously improving SaaS metrics over time ensures your business remains competitive and supports long-term success.
Lessons from Scaling a High-Growth Company
During my time helping scale Canva from approximately US$10 million in revenue to more than US$2 billion, growth metrics were central to decision-making. As the company scaled, understanding not just how fast we were growing — but how efficiently — became increasingly important.
While early-stage startups often prioritise rapid user acquisition and market fit, mature SaaS companies tend to focus on low customer churn, stable revenue, and improving customer lifetime value.
Metrics such as retention, expansion and acquisition efficiency helped guide decisions across product, pricing and go-to-market strategy. Customer success played a critical role in driving sustainable growth, as tracking metrics like Net Promoter Score (NPS) measures customer satisfaction and loyalty. Monitoring these metrics can inform product and strategy decisions, helping to improve customer retention and overall business health.
Growth that is supported by strong fundamentals compounds over time. Growth without those foundations often does not.
Common Mistakes Founders Make
Growth metrics are powerful, but they are often misunderstood.
Some common mistakes include:
Focusing only on top-line growth
Revenue growth alone does not guarantee a healthy business.
Ignoring churn
High churn can undermine even strong acquisition performance.
Not understanding unit economics
Scaling without understanding CAC and LTV can lead to inefficient growth.
Tracking metrics without context
Metrics are only useful when understood together.
Frequently Asked Questions
What is the most important SaaS growth metric?
There is no single metric. ARR, churn and CAC/LTV are often considered the most critical.
What is a good churn rate?
It varies by industry and stage, but lower churn is always better.
What is a strong NRR?
NRR above 100% is typically considered strong, as it indicates expansion within the customer base.
Final Thoughts
SaaS growth metrics provide a framework for understanding how a business is scaling.
They go beyond surface-level growth and reveal the underlying health of the company.
For founders, the goal is not simply to grow — but to grow in a way that is efficient, sustainable and compounding.
Understanding these metrics early can significantly improve decision-making and position a company for long-term success.
Author
Damien Singh is the former CFO of Canva, where he helped scale the company from approximately US$10 million to more than US$2 billion in revenue.