The Seed Stage MRR Calculator estimates monthly recurring revenue from active customers, average monthly subscription revenue, and predictable recurring add-ons. It is designed for early-stage subscription businesses that need a clean operating view without mixing one-time setup fees or nonrecurring services into MRR.
Founders can use the result to track traction, compare growth periods, prepare investor updates, and translate MRR into an annualized run rate. The calculator also shows customer-based MRR and add-on MRR separately so changes in customer count, pricing, and expansion revenue are easier to diagnose.
1. Enter active customers
Use customers who are currently paying for a recurring plan.
2. Add average monthly revenue
Enter the average recurring amount billed per active customer each month.
3. Include recurring add-ons
Add contracted recurring extras, but exclude setup fees and one-time services.
4. Provide prior MRR
Enter the previous month total to calculate month-over-month growth.
5. Review the breakdown
Compare customer-based MRR, add-ons, annualized run rate, and growth.
MRR includes predictable monthly subscription revenue only. The annualized run rate is a simple twelve-month projection and does not account for future churn, upgrades, discounts, or seasonality.
The main result is the recurring revenue expected for one representative month under the entered customer and pricing assumptions.
Keep one-time revenue separate so the metric remains comparable across reporting periods.
Given: 150 active customers, $55 average monthly revenue per customer, $1,200 in recurring add-ons, and $8,900 previous-month MRR.
Calculation: Customer MRR = 150 × $55 = $8,250. Total MRR = $8,250 + $1,200 = $9,450. Annualized run rate = $9,450 × 12 = $113,400. Growth = ($9,450 − $8,900) ÷ $8,900 × 100 = 6.18%.
Result: Estimated MRR is $9,450, with a $113,400 annualized run rate and 6.18% month-over-month growth.
No. MRR should represent revenue that is contractually recurring each month.
Convert annual recurring contract value to a monthly amount by dividing it by 12 before including it.
The calculator leaves growth unavailable because percentage growth from a zero base is undefined.
No. It simply multiplies current MRR by 12 and does not model churn, new sales, or pricing changes.
For operational MRR, use activated paying customers. Committed future revenue is better tracked separately.