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ARR growth rate is the headline number for any SaaS, the first thing a board or investor looks at. But the raw rate means little without context, because growth naturally decelerates as your base gets bigger. Doubling from $1M to $2M is 100% growth. Doubling from $50M to $100M is the same percentage but a vastly harder feat. This calculator gives you the rate; judge it against your scale.
The other trap is confusing ARR growth with revenue growth. ARR captures recurring subscription revenue and is the cleaner SaaS metric, stripping out one-off services and professional fees that can flatter a growth number. For an honest read of how fast the core SaaS business is compounding, use ARR, not total revenue.
Use annual recurring revenue at both points, excluding one-off services and professional fees, for a clean SaaS growth read.
Compare the same period year over year or annualise carefully. Comparing mismatched periods produces misleading rates.
A growth rate is only meaningful relative to your ARR base. Expect and accept deceleration as you get larger.
ARR growth rate is the percentage by which your annual recurring revenue grows over a period, usually a year. It is calculated as ending ARR minus starting ARR, divided by starting ARR. As the headline SaaS growth metric, it is the first number most boards and investors look at, though it always needs interpreting against your scale, because the same percentage is far harder to achieve on a large revenue base than a small one.
Subtract your starting ARR from your ending ARR, divide the result by the starting ARR and multiply by 100 for a percentage. For example, growing from $2M to $3.4M ARR is a $1.4M increase on a $2M base, which is 70% growth. Use annual recurring revenue rather than total revenue at both points, so that one-off services and professional fees do not distort the underlying SaaS growth picture.
It depends heavily on scale. Early-stage SaaS often grows 100% or more a year, while a SaaS past $50M ARR doing 30 to 40% is performing strongly, because growth naturally decelerates as the base compounds. For venture-backed SaaS, sustained growth well above the market is the expectation. For bootstrapped or profitable SaaS, a lower growth rate paired with healthy margins can be perfectly sound. Judge it against both your scale and your strategy.
ARR growth measures only recurring subscription revenue, while revenue growth includes everything: subscriptions plus one-off services, professional fees and other income. ARR is the cleaner SaaS metric because it reflects the predictable, recurring core of the business, which is what makes SaaS valuable. A company can show strong revenue growth on the back of services work while its recurring ARR grows slowly, so investors focus on ARR for the truer picture.
Because each year of the same percentage growth requires a larger absolute increase. Growing 100% from $1M means adding $1M, while growing 100% from $50M means adding $50M, which requires vastly more customers, market and execution. Markets are finite and competition intensifies, so almost all SaaS see their growth rate decline as they scale, even as the absolute dollars added keep rising. Decelerating growth is normal and expected.
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