Subscription Ecommerce MRR Calculator

Enter your new customers per month, average revenue per customer, churn, and expansion. Get a month-by-month MRR projection.

Inputs

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Results

Updates as you type

Ending MRR (Month 12)

$13,917.85

MonthNewExpandChurnEnd MRR
Apr 2026+$1,225.00+$0.00-$0.00$1,225.00
May 2026+$1,225.00+$36.75-$49.00$2,437.75
Jun 2026+$1,225.00+$73.13-$97.51$3,638.37
Jul 2026+$1,225.00+$109.15-$145.53$4,826.99
Aug 2026+$1,225.00+$144.81-$193.08$6,003.72
Sep 2026+$1,225.00+$180.11-$240.15$7,168.68
Oct 2026+$1,225.00+$215.06-$286.75$8,321.99
Nov 2026+$1,225.00+$249.66-$332.88$9,463.77
Dec 2026+$1,225.00+$283.91-$378.55$10,594.14
Jan 2027+$1,225.00+$317.82-$423.77$11,713.20
Feb 2027+$1,225.00+$351.40-$468.53$12,821.06
Mar 2027+$1,225.00+$384.63-$512.84$13,917.85

How to project your MRR

Enter your growth inputs

How many new customers do you add per month, and what is the average revenue per customer? This sets your new MRR each month.

Add churn and expansion rates

What percentage of existing MRR do you lose to cancellations each month? And how much do you gain from upgrades and add-ons? The net of these two determines whether your base grows or shrinks.

See the month-by-month projection

A table showing new MRR, expansion, churn, and ending MRR for each month. You can see exactly where your revenue is headed and how long it takes to hit milestones.

How to grow MRR faster

Three paths: add more customers, get more from existing ones, or lose fewer.

Fix churn first

If you are losing 6% per month and adding 8%, your net growth is only 2%. Cut churn to 3% and net growth jumps to 5% without acquiring a single extra customer.

Build expansion into your product

Usage-based pricing, premium tiers, and add-on features create natural upgrade paths. If expansion rate exceeds churn rate, your MRR grows from existing customers alone.

Increase ARPC with annual plans

Annual plans at a small discount increase average revenue per customer and reduce churn at the same time. A customer paying $500/year is more predictable than one paying $49/month.

Use reviews to reduce cancellations

Customers who have publicly endorsed your product by leaving a review are less likely to cancel. That small act of commitment creates stickiness that shows up in your churn numbers.

Focus on activation, not just signups

A customer who signs up but never uses the product will churn within 60 days. Better onboarding turns signups into active users, which turns new MRR into retained MRR.

Run this projection quarterly

Your inputs change. Customer acquisition slows in some months, churn spikes after a price increase, expansion picks up after a feature launch. Re-run the projection with fresh numbers to keep your forecast honest.

Grow MRR with
reviews that retain

Customers who engage with your product through reviews stick around longer. WiserReview automates that engagement so your churn rate drops and your MRR compounds.

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FAQs

Common questions about MRR.

Monthly Recurring Revenue -- the predictable income your business earns every month from active subscriptions or recurring customers. If you have 200 customers paying $49/month on average, your MRR is $9,800.
Number of active customers times average revenue per customer. This calculator goes further by projecting MRR forward with new customer growth, expansion from upgrades, and losses from churn.
MRR is monthly, ARR is annual. ARR is just MRR times 12. MRR is better for tracking short-term changes. ARR is better for annual planning and investor conversations.
Early-stage companies often target 15-20% month-over-month. More established businesses aim for 5-10%. But net growth (after churn) is what matters. 15% gross growth with 8% churn is only 7% net.
It compounds against you. 4% monthly churn means after 12 months, roughly 39% of your starting MRR is gone. New MRR has to replace all of that before your total actually grows.
Additional revenue from existing customers -- upgrades, add-ons, usage increases. It is the most capital-efficient growth because you already paid to acquire the customer. The best SaaS companies get more expansion MRR than new customer MRR.
Yes. If churn exceeds new MRR plus expansion, your ending MRR is lower than starting MRR. The projection table makes this obvious -- you will see the ending MRR column declining month over month.
Monthly, using real numbers from the previous month. Your new customer rate, ARPC, churn, and expansion all change. A projection from 3 months ago is probably wrong by now.