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SaaS MRR & Growth Calculator

Calculate MRR, ARR, churn rate, and LTV

Active Customers

ARPU (Monthly)

Monthly Churn Rate

Monthly Growth Rate

Customer Acquisition Cost (CAC)

MRR

$4,900

Monthly Recurring Revenue

ARR

$58,800

Annual Recurring Revenue

LTV

$1,633

Customer Lifetime Value

LTV:CAC Ratio

8.2:1

Healthy

Annual Churn Rate

30.6%

3% monthly compounds to 30.6% annually

CAC Payback Period

4.1 months

Time to recover acquisition cost

Net Growth Rate

+2%

Growth (5%) - Churn (3%)

12-Month MRR Projection

Month	Now	+1	+2	+3	+4	+5	+6	+7	+8	+9	+10	+11	+12
Customers	100	102	104	106	108	110	113	115	117	120	122	124	127
MRR	$5k	$5k	$5k	$5k	$5k	$5k	$6k	$6k	$6k	$6k	$6k	$6k	$6k

Projected ARR in 12 months: $74,573 (+27% vs today)

SaaS Benchmarks

LTV:CAC Ratio

<1:1 = Losing money
1-3:1 = Needs improvement
3:1+ = Healthy (target)

Monthly Churn

>5% = High (SMB typical)
2-5% = Average
<2% = Good (Enterprise)

CAC Payback

>18 mo = Too slow
12-18 mo = Average
<12 mo = Efficient

Key SaaS Metrics Explained

MRR (Monthly Recurring Revenue)


MRR = Number of Customers × Average Revenue Per User


ARR (Annual Recurring Revenue)


ARR = MRR × 12


Churn Rate


Monthly Churn = Lost Customers / Starting Customers × 100


Customer Lifetime Value (LTV)


LTV = ARPU / Monthly Churn Rate

MRR Components

New MRR: Revenue from new customers
Expansion MRR: Upgrades and add-ons from existing customers
Churned MRR: Lost revenue from cancellations
Net New MRR: New + Expansion - Churned

Benchmarks by Stage

Frequently Asked Questions

What is MRR?

Monthly Recurring Revenue (MRR) is the predictable revenue a SaaS business expects every month from active subscriptions. It's calculated by multiplying the number of paying customers by the average revenue per user (ARPU).

How do you calculate churn rate?

Monthly churn rate = (Customers lost during month / Customers at start of month) × 100. Revenue churn is similar but uses MRR instead of customer count. Net revenue churn includes expansion revenue.

What is a good LTV:CAC ratio?

A healthy SaaS business typically has an LTV:CAC ratio of 3:1 or higher. This means the lifetime value of a customer is at least 3x the cost to acquire them. Below 1:1 means you're losing money on each customer.