Quick Answer (TL;DR)
Expansion MRR measures additional revenue from existing customers (upsells, cross-sells). The formula is Sum of revenue increases from existing customers. Industry benchmarks: >30% of new MRR for best-in-class. Track this metric when measuring growth from existing base.
What Is Expansion MRR?
Additional revenue from existing customers (upsells, cross-sells). This is one of the core metrics in the revenue metrics category and is essential for any product team serious about data-driven decision making.
Expansion MRR connects product performance to business sustainability. Revenue metrics translate user behavior into financial outcomes, making them essential for board reporting, investor communication, and strategic planning.
Understanding expansion mrr in context --- alongside related metrics --- gives you a more complete picture than tracking it in isolation. Use it as part of a balanced metrics dashboard.
The Formula
Sum of revenue increases from existing customers
How to Calculate It
Aggregate the relevant events over your chosen time period (daily, weekly, or monthly). For example, if you count 12,500 events in a week, your expansion mrr is 12,500 per week. Track this consistently to identify trends.
Benchmarks
>30% of new MRR for best-in-class
Benchmarks vary significantly by industry, company stage, business model, and customer segment. Use these ranges as starting points and calibrate to your own historical data over 2-3 quarters. Your trend matters more than any absolute number --- consistent improvement is the goal.
When to Track Expansion MRR
When measuring growth from existing base. Specifically, prioritize this metric when:
You are building or reviewing your metrics dashboard and need revenue indicators
Leadership or investors ask about revenue performance
You suspect a change in product, pricing, or go-to-market strategy has affected this area
You are running experiments that could impact expansion mrr
You need a quantitative baseline before making a strategic decision
How to Improve
Optimize pricing regularly. Most companies set pricing once and forget it. Review pricing quarterly, test willingness to pay, and ensure your pricing reflects the value you deliver.
Focus on expansion revenue. Growing revenue from existing customers is 5-7x cheaper than acquiring new ones. Build upgrade paths, usage-based pricing tiers, and cross-sell opportunities.
Reduce involuntary churn. Failed payments account for 20-40% of SaaS churn. Implement dunning flows, card update reminders, and retry logic to recover revenue automatically.
Common Pitfalls
Not normalizing for time period. Revenue metrics must be calculated over consistent time periods. Comparing a 28-day month to a 31-day month without normalization creates misleading trends.
Ignoring revenue quality. Not all revenue is equal. Revenue from customers likely to churn, deeply discounted deals, or one-time contracts should be weighted differently than high-quality recurring revenue.
Measuring without acting. Tracking this metric is only valuable if you have a process for reviewing it regularly and a playbook for responding when it moves outside acceptable ranges.
Related Metrics
New MRR --- revenue from newly acquired customers
Churned MRR --- revenue lost from cancellations
MRR Growth Rate --- month-over-month growth in MRR
Quick Ratio (SaaS) --- ratio of revenue growth to revenue loss
Product Metrics Cheat Sheet --- complete reference of 100+ metrics