Understanding ARR, MRR, NRR, and GRR: The Revenue Metrics Every SaaS Team Should Track
Recurring revenue businesses live and die by a handful of metrics. Annual Recurring Revenue (ARR), Monthly Recurring Revenue (MRR), Net Revenue Retention (NRR), and Gross Revenue Retention (GRR) together tell the complete story of whether a company is growing sustainably or papering over churn with new sales. Yet most growth-stage teams track these numbers in spreadsheets updated manually each quarter, leaving leaders to make decisions from stale, incomplete data.
Alpha GTM solves this by recalculating every metric in real time from live customer data. The scoreboard displays ARR and MRR as headline figures, then breaks them down by active, renewed, expanded, and new logo segments. NRR and GRR are calculated dynamically across month-to-date, quarter-to-date, and year-to-date periods, so teams always know whether their retention is improving or eroding. When NRR falls below 105% or GRR below 90%, the scoreboard highlights those metrics in red — a visual early warning that the revenue motion needs attention before the next board meeting.
ARR (Annual Recurring Revenue)
The total annualized value of all active subscription contracts. ARR is the headline number investors and buyers use to size a recurring revenue business. It is calculated by multiplying monthly recurring revenue by twelve, or by summing the annual contract value of every active account. ARR grows through new logo acquisition, expansion of existing accounts, and price increases, and it shrinks through churn and contraction. Tracking ARR in real time — rather than at quarterly board meetings — lets leaders spot trends before they become problems.
MRR (Monthly Recurring Revenue)
The monthly equivalent of ARR, calculated by summing the monthly value of all active subscriptions. MRR is the most granular recurring revenue metric and is essential for short-term forecasting and cohort analysis. Because MRR updates with every renewal, expansion, and churn event, it serves as the pulse of the business. Teams that track MRR movements month over month can identify whether growth is accelerating, decelerating, or stagnating well before annual figures reveal the trend.
NRR (Net Revenue Retention)
Measures the percentage of recurring revenue retained from existing customers over a given period, including expansion and excluding new logos. NRR above 100% means existing customers are growing faster than churn and contraction shrink the base. A healthy SaaS business targets NRR above 110%, and anything below 105% signals that expansion motions are not keeping pace with losses. NRR is the single strongest predictor of long-term enterprise value because it reflects whether a company can grow without constantly acquiring new customers.
GRR (Gross Revenue Retention)
Measures the percentage of recurring revenue retained from existing customers after churn and contraction, but before expansion. Unlike NRR, GRR cannot exceed 100%. It isolates the health of the existing base by removing the positive effect of upsells. A GRR below 90% indicates that customers are leaving or downgrading at a rate that expansion alone cannot offset. Tracking GRR separately from NRR reveals whether growth is coming from a healthy base or from expansion masking underlying churn.
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