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SAAS REVENUE CALCULATOR

SaaS Revenue Calculator — MRR, Churn, LTV & CAC Forecast

Free SaaS revenue calculator for US subscription businesses. Forecast MRR, ARR, churn, customer LTV, CAC payback, LTV:CAC ratio, net revenue retention, and monthly operating profit.

1. Customer & Revenue Metrics

Paying subscribers at the start of the projection.
Monthly recurring revenue per customer.
Percent of customers lost each month.
Gross new customers added in month 1.

2. Acquisition & Retention

Fully loaded marketing + sales cost to win one customer.
Percent of revenue left after hosting and delivery costs.
Payroll, tools, rent, and other fixed monthly costs (excludes CAC).
Used only for the manual LTV comparison. LTV is computed from churn.

3. Growth & Projection

1 to 24 months. Chart shows months 1, 3, 6, 9, and the final month.
Compounding monthly increase in new customer acquisition.
Upsells and cross-sells added to existing MRR each month.

4. Reference & Notes

SAAS REVENUE ANALYSIS

Business Performance Forecast

Reference: SAAS-2026-001
Date:
Current MRR $25,000.00
Active Customers 500
Monthly Churn 3.0%
Projected MRR $36,000.00
Customer LTV $1,666.67
LTV:CAC Ratio 8.3x
CAC Payback (net of margin) 5.0 Months
Net Revenue Retention 97.0%

Key SaaS Metrics

Current MRR $25,000.00
ARR $300,000.00
Churned MRR / month $750.00
Net New MRR / month $250.00

Operating Profit

Gross Profit (MRR × Margin) $20,000.00
Monthly Operating Costs $15,000.00
Net Operating Profit $5,000.00
Operating Margin 20.0%

MRR Projection

Month 1 $25,985
Month 3 $27,950
Month 6 $31,900
Month 9 $35,900
Month 12 $40,100

Business Health Score

Customer Health 70.0%
Revenue Health 85.0%
Overall Health 77.5%

SaaS Revenue Formula

MRR = Active Customers × ARPU

500 × $50.00 = $25,000.00

Your SaaS business currently generates $25,000.00 MRR and is projected to reach $40,100.00 in 12 months.

Notes

SaaS business performance forecasting

This calculation is for informational and educational purposes. Actual SaaS performance depends on pricing, sales efficiency, retention, and market conditions. Consult a business advisor or CFO for decisions specific to your company.
Prepared By
Date
GUIDE

How to Use This SaaS Revenue Calculator

This free SaaS revenue calculator forecasts MRR (Monthly Recurring Revenue) and ARR (Annual Recurring Revenue) for a subscription business, and simultaneously computes the metrics investors and operators care about most: customer LTV, CAC payback, LTV:CAC ratio, net revenue retention, and monthly operating profit. Use it to plan pricing, size marketing budgets, and pressure-test your growth assumptions. For a deeper unit-economics cross-check, pair it with our Lifetime Value Calculator and Customer Acquisition Cost Calculator.

1

Enter Customer Metrics

Current active customers, ARPU, monthly churn rate, and gross new customers added in month 1.

2

Add Acquisition & Costs

CAC, gross margin, and fixed monthly operating costs so the calculator can compute net profit.

3

Set Growth Projection

Projection months, monthly growth rate for new customers, and monthly expansion revenue as a percent of MRR.

4

Review Metrics

See current MRR, projected MRR, LTV, CAC payback, LTV:CAC ratio, NRR, and operating profit.

5

Save, Print or Export

Save a draft, print results, or download a PDF of the analysis for your records.

SAAS EDUCATION

What Does a SaaS Revenue Calculator Calculate?

A SaaS revenue calculator — also called an MRR calculator or SaaS metrics calculator — converts subscriber counts, ARPU, churn, and acquisition costs into the standard metrics used to run and value a subscription business. It replaces the messy spreadsheet with a consistent, transparent model.

Key SaaS calculations

  • MRR: Monthly Recurring Revenue — Active Customers × ARPU.
  • ARR: Annual Recurring Revenue — MRR × 12.
  • Churned MRR: MRR lost each month due to cancellations.
  • Net New MRR: New MRR + Expansion − Churned MRR.
  • Customer LTV: ARPU ÷ Monthly Churn Rate (or ARPU × average lifetime).
  • LTV:CAC Ratio: Customer LTV ÷ CAC. Target ≥ 3:1.
  • CAC Payback: CAC ÷ (ARPU × Gross Margin). Target under 12 months.
  • NRR (Net Revenue Retention): (Starting MRR + Expansion − Churned MRR) ÷ Starting MRR × 100.
  • Operating Profit: MRR × Gross Margin − Monthly Operating Costs.

Who can use this SaaS revenue calculator?

  • SaaS Founders and CEOs: Model MRR growth, retention, and profit margins.
  • CFOs and Finance Leaders: Forecast ARR and unit economics for board reporting.
  • Growth and Marketing Teams: Set CAC limits from LTV and payback targets.
  • Investors and Analysts: Screen SaaS opportunities on standard metrics.
  • Operators and Product Managers: Stress-test churn and expansion scenarios.
METHODOLOGY

SaaS Revenue Calculator Methodology

MoneyTool uses the standard subscription-revenue formulas used across the SaaS industry. The calculator is transparent about what each metric captures and what it does not.

1. MRR and ARR

Current MRR = Active Customers × ARPU

ARR = MRR × 12

2. Churned MRR and Net New MRR (month 1)

Churned customers = Active Customers × Monthly Churn Rate

Churned MRR = Churned customers × ARPU

Net New MRR = (New customers − Churned customers) × ARPU + Expansion MRR

3. MRR projection (monthly loop)

For each month t:

New(t) = New(1) × (1 + Growth Rate)t−1

Customers(t) = Customers(t−1) × (1 − Churn) + New(t)

ARPU(t) = ARPU(t−1) × (1 + Expansion Rate)

MRR(t) = Customers(t) × ARPU(t)

This ensures that expansion compounds correctly and that retained customers continue to pay the (possibly expanded) ARPU.

4. Customer LTV

Customer LTV = ARPU ÷ Monthly Churn Rate

This is the industry-standard way to compute LTV from churn. A manual "expected lifetime" input is shown only as a comparison — it does not affect the primary LTV used in the LTV:CAC ratio.

5. CAC Payback Period

CAC Payback (months) = CAC ÷ (ARPU × Gross Margin)

Using gross margin reflects that not all ARPU becomes contribution. Sub-12-month payback is the standard benchmark for efficient SaaS growth.

6. LTV:CAC ratio

LTV:CAC = Customer LTV ÷ CAC

A ratio of 3:1 or higher is the widely used benchmark for sustainable growth.

7. Net Revenue Retention (NRR)

NRR = (Starting MRR + Expansion MRR − Churned MRR) ÷ Starting MRR × 100

Best-in-class SaaS businesses target 110% or higher.

8. Operating profit

Gross Profit = MRR × Gross Margin

Operating Profit = Gross Profit − Monthly Operating Costs

Operating costs exclude CAC (which is a growth investment, not a fixed cost).

Important assumptions

  • Churn and expansion rates are constant month-over-month.
  • New-customer acquisition grows at a constant compounding rate.
  • ARPU growth is modeled as expansion revenue only; no downgrades are modeled separately.
  • Taxes, one-time fees, and payment processing are not included.
  • This is a planning estimate, not a financial forecast or valuation.
E-E-A-T & SOURCES

SaaS Revenue Information, Sources & Editorial Review

MoneyTool separates calculation results from financial education and personalized business advice. The calculator uses standard subscription-revenue formulas, while external SaaS guidance should be verified with authoritative sources.

Author and editorial responsibility

Methodology reviewed by the MoneyTool Finance Expert Team, a group of accountants, CPAs, and personal-finance analysts who maintain MoneyTool's calculator library and financial education content.

Last reviewed: | Subscription-revenue SaaS methodology

Next review: When calculation logic, supported inputs, or relevant guidance changes.

Authoritative U.S. business and SaaS resources

  • U.S. Securities and Exchange Commission (SEC) — Investor.gov: SEC Investor.gov provides investor education on business fundamentals, metrics, and reporting.
  • U.S. Small Business Administration (SBA) — Business Guide: SBA Business Guide covers business planning, pricing, financing, and marketing for US small businesses.
  • U.S. Small Business Administration (SBA) — Loans: SBA Loan Programs covers SBA-backed financing options for growth capital.
  • Financial Industry Regulatory Authority (FINRA): FINRA Investor Education offers practical guidance on evaluating businesses and understanding financial metrics.
  • U.S. Bureau of Labor Statistics (BLS) — Business Employment Dynamics: BLS Business Employment Dynamics provides national data on business formation, survival, and growth.
  • Internal Revenue Service (IRS) — Small Business Tax Center: IRS Small Business Tax Center covers expense treatment, deductions, and payroll tax that affect operating profit.
  • Federal Trade Commission (FTC) — Business Guidance: FTC Business Guidance covers advertising, disclosure, and fair-pricing rules relevant to SaaS pricing.
  • Consumer Financial Protection Bureau (CFPB): CFPB Consumer Tools provides consumer-facing financial guidance that pairs with business education.

External resources are provided for education and verification. MoneyTool is not affiliated with or endorsed by the SEC, SBA, FINRA, BLS, IRS, FTC, or CFPB.

BEST PRACTICES

Tips for SaaS Revenue Growth

SaaS growth is driven by three multipliers: acquisition, retention, and expansion. Optimize all three — improving just one rarely delivers the outcomes investors expect.

Monitor Churn Closely

Churn is the biggest growth killer. Track it monthly by cohort, segment, and reason.

Maximize LTV

Focus on retention, pricing, and upsells — small improvements compound across the lifetime.

Optimize CAC

Reduce acquisition cost without sacrificing lead quality. Cheaper customers aren't always profitable.

Target LTV:CAC ≥ 3:1

A 3:1 ratio is the widely used benchmark for sustainable, scalable SaaS growth.

Prioritize Retention Over Acquisition

Retaining an existing customer is cheaper than acquiring a new one — and compounds into NRR.

Consult a Professional

For pricing, fundraising, or M&A decisions, validate projections with a CFO or CPA.

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FAQ

Frequently Asked Questions About SaaS Revenue

What is MRR?

MRR (Monthly Recurring Revenue) is the predictable subscription revenue a SaaS business collects each month. It is calculated as Active Customers × Average Revenue Per User.

What is a good monthly churn rate for SaaS?

For SMB SaaS, a monthly churn rate below 3% is generally considered healthy. Enterprise SaaS often targets under 1% monthly churn. Higher churn limits growth and raises CAC payback.

What is a good LTV:CAC ratio for SaaS?

A LTV:CAC ratio of 3:1 or higher is the widely used benchmark for sustainable SaaS growth. Ratios below 1.5:1 usually indicate a business is spending too much to acquire customers.

What is net revenue retention (NRR)?

Net Revenue Retention is the percentage of recurring revenue retained from existing customers after accounting for churn, downgrades, and expansion. Best-in-class SaaS businesses target 110% or higher.

How is CAC payback period calculated?

CAC Payback Period = Customer Acquisition Cost ÷ (Average Revenue Per User × Gross Margin). A payback period under 12 months is generally considered strong for SaaS businesses.

Is this SaaS revenue calculator free?

Yes. MoneyTool provides this SaaS revenue calculator free for educational and planning use.

Can I save my SaaS analysis?

Yes. Save Draft stores the calculator inputs in your browser. Print Results and Download PDF can be used to keep a copy of the displayed analysis.

LEGAL

SaaS Revenue Calculator Disclaimer

This SaaS revenue calculator provides estimates for informational and educational purposes. It does not constitute financial, legal, tax, accounting, or investment advice. Actual SaaS performance depends on pricing, sales efficiency, retention variability, market conditions, and other factors not modeled here.

  • Estimates only: Results depend on the inputs and assumptions described in the methodology.
  • Not a forecast: MRR and ARR projections are planning estimates, not forward-looking financial statements.
  • Not investment advice: The calculator is not a valuation or fundraising tool.
  • Verify with a professional: For pricing, fundraising, or M&A decisions, validate projections with a CFO, CPA, or advisor.
Last methodology review: . Calculator logic and educational content should be reviewed again whenever the methodology, supported inputs, or relevant external guidance changes.