What is ARR Components? (Definition + SaaS example)
ARR components are the revenue movements that explain how Annual Recurring Revenue changes over time. SaaS companies typically break ARR into beginning ARR, new ARR, expansion ARR, contraction ARR, reactivation ARR, and churned ARR to understand growth quality and forecast future performance.
What ARR Components Are
ARR components break a single ARR number into the movements that created it. Instead of only saying that ARR increased from $2 million to $2.4 million, the component view shows how much came from new customers, upgrades, downgrades, churn, and reactivations.
That makes the metric much more actionable for finance, sales, and customer success teams.
Standard ARR Components
Beginning ARR: recurring revenue at the start of the periodNew ARR: recurring revenue from newly signed customersExpansion ARR: additional recurring revenue from existing customersContraction ARR: recurring revenue lost from downgrades or seat reductionsChurned ARR: recurring revenue lost from cancellations or non-renewalsReactivation ARR: recurring revenue from customers who return after previously churning
Formula and ARR Bridge
ARR Movement Formula
Ending ARR = Beginning ARR + New ARR + Expansion ARR + Reactivation ARR − Contraction ARR − Churned ARR
Worked SaaS Example
| ARR Component | Amount |
|---|---|
| Beginning ARR | $1,800,000 |
| + New ARR | $240,000 |
| + Expansion ARR | $120,000 |
| + Reactivation ARR | $30,000 |
| − Contraction ARR | −$50,000 |
| − Churned ARR | −$90,000 |
| Ending ARR | $2,050,000 |
In this example, the company grew ARR by $250,000 during the period. The component view shows that strong new sales and expansion more than offset contraction and churn.
ARR Components vs ARR
How SaaS Teams Use ARR Components
Finance leaders use ARR components to answer questions like:
- Is growth coming from new business or from the installed base?
- Are expansions large enough to offset churn?
- Which customer segments drive the healthiest recurring growth?
- Is the company becoming more efficient as it scales?
Those answers matter because two companies with the same ARR can have very different growth quality. A company with strong expansion and low churn is usually more resilient than one that relies heavily on new logos to replace lost revenue.
Related Metrics
ARR components connect closely to ARR, MRR, NRR, and revenue churn. Together, those pages explain the size of the recurring base, how it moves, how much existing customers retain, and where revenue leakage occurs.
See ARR movement by component in JustPaid
Frequently Asked Questions
Most SaaS finance teams track beginning ARR, new ARR, expansion ARR, contraction ARR, reactivation ARR, and churned ARR. Together, these explain how ARR moved from one period to the next.
Related Terms
ARR (Annual Recurring Revenue)
Annual Recurring Revenue (ARR) is the annualized value of a SaaS company's committed recurring subscription revenue. ARR equals MRR multiplied by 12 and usually excludes one-time fees, services, and purely variable usage, making it a standard metric for investor reporting, valuation, and annual planning.
MRR (Monthly Recurring Revenue)
Monthly Recurring Revenue (MRR) is the predictable revenue a SaaS company earns each month from active subscriptions. MRR normalizes different billing periods — annual, quarterly, and monthly — into one consistent monthly figure, making it the foundational metric for SaaS financial planning.
NRR (Net Revenue Retention)
Net Revenue Retention (NRR) measures the percentage of recurring revenue retained from existing customers over a period, including expansion, contraction, and churn. An NRR above 100% means a SaaS company is growing revenue from its existing customer base without acquiring a single new customer.
Revenue Churn
Revenue churn measures how much recurring revenue a SaaS company loses from downgrades and cancellations during a period. It is often expressed as lost MRR or ARR, or as a percentage of starting recurring revenue, and is more financially meaningful than customer churn alone.
