Growth rate measures how much a business metric increases or decreases over a defined period, usually as a percentage of its starting value. In SaaS, teams may calculate growth rates for recurring revenue, customers, active users, signups, or other measures that matter to the business.
A growth rate is only useful when the metric, time period, and calculation rules are clear. Revenue growth, customer growth, and user growth describe different things and can move in different directions.
How Is Growth Rate Calculated?
Growth rate (%) = (Current period value − Previous period value) ÷ Previous period value × 100
For example, if monthly recurring revenue (MRR) rises from $80,000 to $92,000, the growth rate is ($92,000 − $80,000) ÷ $80,000 × 100 = 15%.
If the starting value is zero, this percentage formula cannot be calculated because it requires division by zero. In that case, report the absolute change and explain the context instead.
Common Growth Rates in SaaS
- MRR growth rate: The percentage change in monthly recurring revenue between periods.
- ARR growth rate: The percentage change in annual recurring revenue using a consistent ARR methodology.
- Customer growth rate: The percentage change in the number of customers.
- User growth rate: The percentage change in a defined user population, such as active users or registered users.
- Signup growth rate: The percentage change in new signups during comparable periods.
- Revenue growth rate: The percentage change in recognized revenue, which may differ from recurring revenue metrics.
Why Growth Rate Matters
Shows direction and pace
Growth rate helps teams understand whether a metric is increasing or decreasing and how quickly it is changing. Looking at several periods can reveal whether growth is accelerating, slowing, or fluctuating.
Supports goal setting
Teams can use growth rates to set measurable targets and compare actual results with plans. Targets should reflect the company’s stage, business model, available resources, and the quality of its underlying data.
Helps evaluate strategies
After changes to pricing, marketing, onboarding, or product features, teams can review relevant growth measures. A change in growth rate alone does not prove that a strategy caused the result, so other factors should be considered.
Improves communication
A clearly defined growth rate can make reports easier to understand, especially when paired with the starting value, ending value, and time period.
Growth Rate vs. Growth Amount vs. Compound Growth
| Measure | Meaning |
|---|---|
| Growth amount | The absolute difference between the current and previous values. |
| Growth rate | The change expressed as a percentage of the starting value. |
| Month-over-month (MoM) growth | The percentage change from one month to the previous month. |
| Year-over-year (YoY) growth | The percentage change compared with the same period one year earlier. |
| Compound annual growth rate (CAGR) | A smoothed annual rate describing the growth from a starting value to an ending value over multiple years, assuming compounding. |
How to Interpret SaaS Growth Rate
- Use comparable periods. Compare like with like, such as the same number of days or the same month in different years where seasonality matters.
- State the metric clearly. Specify whether the rate refers to MRR, ARR, recognized revenue, customers, or users.
- Review absolute values too. A small starting base can produce a large percentage change, while a mature business may add more dollars at a lower rate.
- Account for seasonality. Promotions, renewal cycles, holidays, and annual billing patterns can affect short-term results.
- Check data consistency. Keep event definitions, revenue treatment, customer counting, and reporting windows stable.
- Investigate the drivers. Break changes down by new business, expansion, churn, pricing, or customer segments where possible.
- Pair growth with quality measures. Review retention, gross margin, acquisition costs, and customer satisfaction so growth is not viewed in isolation.
Common Growth Rate Mistakes
- Comparing different metrics or periods as if they were equivalent.
- Confusing percentage growth with percentage-point change.
- Reporting a high growth rate without the starting base or absolute change.
- Annualizing a short-term result without explaining the assumption.
- Ignoring churn, refunds, one-time revenue, or changes in the metric definition.
- Assuming correlation between a campaign and growth proves causation.
Frequently Asked Questions
What is a good growth rate for a SaaS company?
There is no universal target. Growth varies by company stage, size, market, pricing, customer segment, and the metric being measured. Compare with relevant peers when reliable benchmarks exist and track your own trend consistently.
Can growth rate be negative?
Yes. If the current value is below the previous value, the growth rate is negative, indicating a decline during the period.
What is the difference between MoM and YoY growth?
Month-over-month growth compares a month with the previous month. Year-over-year growth compares a period with the corresponding period one year earlier, which can help account for recurring seasonal patterns.
Should SaaS companies track revenue or customer growth?
Often both, along with retention and other measures. Customer growth shows changes in customer count, while revenue growth reflects changes in the revenue measure being tracked. Neither alone explains the full business picture.
How can growth rate be improved?
First identify the metric and the factors behind its change. Depending on the issue, improvements may involve attracting better-fit customers, increasing activation, expanding existing accounts, improving pricing, or reducing churn.