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View offersSaaS MRR & LTV Calculator
Monthly recurring revenue, customer lifetime value and ROI
Updated for 2026
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SaaS
MRR
ARR
LTV
CAC
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What does the SaaS MRR & LTV calculator calculate?
The SaaS MRR & LTV calculator is an online tool that calculates key metrics for SaaS (Software as a Service) businesses, such as Monthly Recurring Revenue (MRR), Annual Recurring Revenue (ARR), Customer Lifetime Value (LTV), and return ratio (LTV/CAC). The calculator shows how subscription revenue is formed, what is the value of each customer over their lifetime, and whether Customer Acquisition Cost (CAC) is justified relative to LTV. The calculator is useful for SaaS startups analyzing their financial health, existing SaaS businesses planning growth, and investors evaluating SaaS companies. It helps you understand if your business model is sustainable, plan marketing expenses, and make informed decisions about strategy and development.
Key metrics for SaaS business
This calculator computes essential SaaS metrics: MRR (Monthly Recurring Revenue), ARR (Annual Recurring Revenue), LTV (Customer Lifetime Value) and LTV/CAC (return on investment ratio). Enter your number of customers, average revenue per customer, monthly churn rate and CAC (if available) to get a complete picture of your SaaS business financial health.
- Enter customers: Enter number of active customers (subscribers).
- Enter ARPU: Enter average monthly revenue per customer (Average Revenue Per User) in BGN.
- Enter churn rate: Enter monthly churn rate as percentage (how many customers leave each month).
- Enter CAC (optional): Enter customer acquisition cost if you have this data.
- Calculate: Click "Calculate" and the calculator will show results.
- Review metrics: View MRR, ARR, LTV, and LTV/CAC ratio.
Example with specific numbers
Example: SaaS business with 100 active customers
- Active customers: 100 customers
- ARPU (average monthly revenue): 50 BGN/customer
- Monthly churn rate: 5% (5 customers leave each month)
- CAC (acquisition cost): 150 BGN/customer
- MRR (monthly revenue): 100 × 50 = 5,000 BGN/month
- ARR (annual revenue): 5,000 × 12 = 60,000 BGN/year
- LTV (customer lifetime value): 50 ÷ 0.05 = 1,000 BGN (average over lifetime)
- LTV/CAC ratio: 1,000 ÷ 150 = 6.67:1 (good ratio)
For a SaaS business with 100 customers, average monthly revenue of 50 BGN/customer and churn rate of 5%, monthly revenue is 5,000 BGN, and annual revenue is 60,000 BGN. LTV per customer is 1,000 BGN, which means with CAC of 150 BGN, the business has a good 6.67:1 ratio, indicating a healthy business model.
Sources and notes
The calculator uses standard formulas for SaaS metrics, based on industry standards. MRR is calculated as: Number of customers × Average monthly revenue. ARR is MRR × 12. LTV is calculated as: Average monthly revenue ÷ Monthly churn rate. The LTV/CAC ratio shows how many times the customer value is greater than the cost of acquiring them. A good LTV/CAC ratio is above 3:1, with optimal being 4-5:1. It's important to note that these metrics are indicative and may vary according to business model, industry, and other factors. For accurate analysis and business planning, always consult with a financial consultant or SaaS expert.
Last updated: April 17, 2026
Data is up to date according to NRA and NOI (Bulgarian tax and social security). For official information see the sources below. Last update: 17 April 2026.
Sources:
- NRA – National Revenue Agency
- NOI – National Social Security Institute
- VAT Act – Bulgarian VAT law
- Local taxes act – Local taxes and fees
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Frequently Asked Questions
What is MRR?
MRR (Monthly Recurring Revenue) is the predictable monthly revenue from all active subscriptions. It's calculated as: Number of customers × Average monthly revenue per customer.
What is LTV?
LTV (Customer Lifetime Value) is the total revenue a customer generates over their lifetime. It's calculated as: Average monthly revenue ÷ Monthly churn rate.
What is a good LTV/CAC ratio?
A good LTV/CAC ratio is above 3:1, with optimal being 4-5:1. This means you earn 4-5 times more from a customer than you spend to acquire them.
What is churn rate?
Churn rate is the percentage of customers who cancel their subscription each month. Lower churn rate means higher LTV and better business health.
How do I reduce churn rate?
Focus on customer success, improve product value, provide excellent support, and regularly engage with customers to understand their needs and reduce cancellations.