Unit Economics Calculator
Calculate your SaaS LTV, CAC, LTV:CAC ratio, and payback period instantly. Benchmark against industry standards to see if your business model is sustainable.
Your SaaS Metrics
Revenue
Monthly revenue per paying customer (ARPU).
Acquisition Costs
Total new paying customers acquired this month.
Quick Tips
- Include all sales and marketing costs in CAC: ads, salaries, tools, commissions, and content production.
- Use logo churn (customer count) for this calculator, not revenue churn. They measure different things.
- If your LTV:CAC is above 5:1, you may be under-investing in growth. Consider scaling acquisition spend.
Unit Economics Dashboard
Customer LTV
$980
CAC
$300
Payback Period
6.1 months
GM-Adjusted LTV
$784
Revenue Snapshot
Monthly MRR
$2,450
Annual ARR
$29,400
Health Scorecard
4 of 4 benchmarks met
Important Note
This calculator uses the simplified LTV formula (ARPU / Churn). Real-world LTV can be affected by expansion revenue, contraction, cohort behavior, and discount rates. Use these numbers as directional guidance, not financial projections.
What Are Unit Economics?
Unit economics is the analysis of revenue and costs on a per-customer basis. For SaaS businesses, it answers the fundamental question: does each customer generate more value than they cost to acquire? The two core metrics are Customer Lifetime Value (LTV) — the total revenue a customer generates before churning — and Customer Acquisition Cost (CAC) — the total spend required to win one new customer.
Understanding unit economics is critical for SaaS founders, investors, and product managers. A business with strong unit economics (high LTV, low CAC, fast payback) can scale confidently. A business with broken unit economics will burn through cash faster as it grows. VCs routinely screen for LTV:CAC ratios before investing, making this one of the most important metrics to track from day one.
How to Calculate LTV, CAC, and LTV:CAC Ratio
The formulas are straightforward, but getting the inputs right is where most teams struggle.
Core Formulas
LTV = ARPU / Monthly Churn Rate
CAC = (Marketing Spend + Sales Spend) / New Customers
LTV:CAC Ratio = LTV / CAC
CAC Payback = CAC / ARPU (in months)
GM-Adjusted LTV = LTV x Gross Margin %
ARPU — Average Revenue Per User per month
Monthly Churn Rate — percentage of customers who cancel each month
Gross Margin — revenue minus cost of goods sold (hosting, support), as a percentage
Start with ARPU: take your total monthly recurring revenue divided by paying customers. For churn, divide the number of customers lost in a month by your starting customer count. CAC should include all acquisition costs: ad spend, sales team salaries, marketing tools, content production, and commissions. Excluding costs here is the most common mistake — it makes your numbers look better than reality.
Worked Examples
Three real-world scenarios showing how unit economics play out at different stages.
Example 1: Early-Stage SaaS ($29/mo plan)
ARPU = $29, Churn = 8%, Marketing = $5,000, Sales = $3,000, New customers = 20
LTV = $29 / 0.08 = $362.50 | CAC = $8,000 / 20 = $400 | LTV:CAC = 0.9x (unsustainable — losing money per customer)
Example 2: Growth-Stage SaaS ($79/mo plan)
ARPU = $79, Churn = 4%, Marketing = $15,000, Sales = $10,000, New customers = 80
LTV = $79 / 0.04 = $1,975 | CAC = $25,000 / 80 = $312.50 | LTV:CAC = 6.3x (very healthy — could invest more in growth)
Example 3: Enterprise SaaS ($499/mo plan)
ARPU = $499, Churn = 2%, Marketing = $30,000, Sales = $50,000, New customers = 15
LTV = $499 / 0.02 = $24,950 | CAC = $80,000 / 15 = $5,333 | LTV:CAC = 4.7x | Payback = $5,333 / $499 = 10.7 months
SaaS Benchmarks Table
How do your metrics stack up? Here are industry benchmarks from leading SaaS analysts.
| Metric | Poor | Acceptable | Healthy | Best-in-Class |
|---|---|---|---|---|
| LTV:CAC Ratio | < 1x | 1x - 3x | 3x - 5x | > 5x |
| CAC Payback | > 24 mo | 12 - 24 mo | 6 - 12 mo | < 6 mo |
| Monthly Churn | > 10% | 5% - 10% | 2% - 5% | < 2% |
| Gross Margin | < 50% | 50% - 70% | 70% - 85% | > 85% |
When to Use This Calculator
Unit economics analysis is essential at every stage of a SaaS business:
- Pre-launch pricing: Test whether your planned price point and estimated churn produce sustainable unit economics before you build.
- Fundraising prep: Investors will ask for your LTV:CAC ratio. Run this calculator to know your numbers and identify weak spots before the pitch.
- Growth planning: If your ratio is above 5x, you can afford to increase acquisition spend. If it is below 3x, focus on retention before scaling.
- Monthly board reporting: Track these metrics monthly to spot trends. Rising CAC or falling LTV are early warning signals that need attention.
- Pricing changes: Before raising or lowering prices, model the impact on LTV and payback period to ensure the change improves overall economics.
Tips to Improve Your Unit Economics
Actionable strategies to move each metric in the right direction.
- Reduce churn first. Churn is the silent killer. A 1% reduction in monthly churn can double your LTV. Invest in onboarding, customer success, and product-market fit before pouring money into acquisition.
- Increase ARPU with value-based pricing. Add premium tiers, usage-based components, or annual plan discounts. Even a small ARPU increase multiplies through the LTV formula.
- Lower CAC with organic channels. Content marketing, SEO, product-led growth (PLG), and referral programs have much lower marginal CAC than paid ads. Build these channels early.
- Include all costs in CAC. Underreporting CAC is the most common mistake. Include salaries, tools, agency fees, and overhead — not just ad spend. Honest numbers lead to better decisions.
- Monitor by cohort. Aggregate metrics can mask problems. Track unit economics by acquisition cohort, channel, and plan tier to find where the real opportunities are.
Frequently Asked Questions
About This Calculator
Free SaaS unit economics calculator. Instantly compute LTV, CAC, LTV:CAC ratio, and payback period. Benchmark your metrics against industry standards.
Frequently Asked Questions
Is the Unit Economics Calculator free to use?
Yes, this calculator is completely free with no registration required. We believe financial and analytical tools should be accessible to everyone. There are no hidden fees, premium features locked behind paywalls, or data collection requirements. You can use the calculator as many times as needed, compare unlimited scenarios, and access all features without creating an account. The tool runs entirely in your browser — your inputs are never sent to our servers or stored anywhere.
The SuperCalc Editorial Team maintains calculator interfaces, formula notes, examples, and supporting explanations. Methods, assumptions, source links, and review depth vary by calculator and are documented on the relevant page where available.