Annual Recurring Revenue (ARR) isn’t just a metric; it’s the lifeblood of every subscription-based business. ​

This guide introduces a simple, interactive SaaS ARR calculator to help you calculate your ARR in real-time, using core inputs to evaluate Net New ARR, Contraction, Churn, and more.

ARR formula

ARR=Gross New ARR+Expansion ARR+Reactivation ARRContraction ARRChurn ARR+Previous Year's ARR

Components of an ARR calculator

  1. Gross New ARR
    Represents the ARR generated from new customers in a given period.
  2. Expansion ARR
    Measures the added revenue from existing customers, including upgrades or additional products purchased.
  3. Contraction ARR
    Captures the ARR lost due to downgrades, such as customers reducing their subscription plans or seat counts.
  4. Churn ARR
    The total ARR lost from customers who cancel their subscriptions.
  5. Reactivation ARR
    Revenue from customers who re-subscribe after canceling.
  6. Previous ARR
    The total ARR from the last period, serving as a base to build on.

SaaS ARR calculator

Enter your figures to instantly calculate ARR based on these components. Adjust any input, and see how each change affects your bottom line. This live calculator will break down your Total ARR and Net New ARR, providing a quick look at how ARR is growing (or shrinking) over time.

$
$
$
$
$
$

Net New ARR

$750,000

New + Expansion + Reactivation − Contraction − Churn

Total ARR

$7,750,000

Previous ARR + Net New ARR

Total MRR

$645,833

Total ARR ÷ 12

A higher churn rate directly lowers ARR. At your current churn rate you're losing 26% of your recurring revenue every year — even a small reduction can significantly boost ARR.

Churn rateARR
Decrease by 2%$7,890,000
Decrease by 4%$8,030,000
Decrease by 5%$8,100,000
Decrease by 7%$8,240,000

Would you like to decrease churn?

Churn has two parts: voluntary and involuntary — you lose either customers (#) or revenue ($). The best way to cut voluntary churn is a great Cancel Flow with trial extensions, pause walls, and offers personalized to each user. Then tackle involuntary churn with Precision Retries, dunning email campaigns, and Reactivations.

Churnkey has a free churn-metrics product to help you understand your numbers, and our full retention platform saves 20–40% of the customers you'd otherwise lose to churn.

Explore Churnkey

ARR calculator formula explanation

Suppose you have the following metrics for this year:

  • Gross New ARR = $2,000,000
  • Expansion ARR = $600,000
  • Contraction ARR = $100,000
  • Churn ARR = $1,800,000
  • Reactivation ARR = $50,000
  • Previous ARR = $7,000,000

Here’s how these components contribute to your Total ARR and Net New ARR:

Calculating Net New ARR:

Net New ARR = Gross New ARR + Expansion ARR + Reactivation ARR − Contraction ARR − Churn ARR = 750,000

Calculate Total ARR:

Total ARR = Previous ARR + Net New ARR = 7,750,000

How Churnkey can help improve ARR?

We’re everything your customer-obsessed team needs to improve retention, automatically. With Churnkey, companies save 20-40% of the revenue they would have otherwise lost to churn. If you aren't yet sure how retention impacts your business, use our free churn metrics product.

To improve your ARR, sign up for Churnkey or book a demo.

ARR benchmarks

After launching

Time to $1M ARRGoodGreat
After launching1 year9 months

After $1M ARR

YearGood Growth RateGreat Growth Rate
Year 13x YoY (10% MoM)5x YoY (16% MoM)
Year 23x YoY (10% MoM)4x YoY (12% MoM)
Year 32x YoY (5% MoM)3x YoY (10% MoM)
Year 42x YoY (5% MoM)2.5x YoY (8% MoM)
Year 52x YoY (5% MoM)2.5x YoY (8% MoM)

By funding round

Funding RoundGood Growth RateGreat Growth RateBelow Expectations
Series A$1M ARR, 2-3x YoY$1M ARR, 3x+ YoY<$1M ARR, <2x YoY
Series B$5M ARR, 2-3x YoY$5M ARR, 3x YoY<$5M ARR, <2x YoY
Series C+$20M ARR, 1-2x YoY$20M ARR, 2-3x YoY<$20M ARR, <1x YoY

Additional reading

Retention Cohort Analysis: Four Simple Ways

Retention automation separates growth heroes from growth zeroes

Calculate Customer Retention Rate and Revenue Retention [Calculator]

Customer Retention Curve: Calculator, Definition, Examples

Customer Exit Survey: 21 Templates, Questions, and Best Practices

Understanding the FTC’s New Negative Option Rule and Its Impact on Free Trials

How Churn Affects SaaS Company Valuations