Can agents run this deterministically?

Yes. The engine is a pure function with zero randomness. Given identical inputs, every run produces byte-identical JSON output suitable for automated pipelines.

SaaS Growth Metrics

Unit Economics Calculator

Calculate LTV:CAC ratio, payback period, and unit-level viability to see if your business model works per customer.

Results

LTV:CAC Ratio

5.88x

Excellent

LTV

$882.00

CAC

$150.00

CAC Payback Period

4.1 mo

Unit Profit

$732.00

Monthly Contribution

$36.75

Per customer, per month (after COGS)

LTV vs CAC

Compare lifetime value against acquisition cost.

LTV

$882.00

CAC

$150.00

Assumptions Warning

Churn rate implies a lifespan of 33.3 months, but you entered 24 months. Your LTV projection may be optimistic.

Business planning estimates — not legal, tax, or accounting advice.

How to use it

Enter CAC, monthly ARPU, gross margin percent, average customer lifespan in months, and monthly churn percent. Lifespan and churn should broadly agree because 5% monthly churn implies about 20 months of expected life, while 2% implies about 50 months.
Read monthly contribution, LTV, LTV:CAC ratio, CAC payback months, unit profit, implied lifespan from churn, and the verdict. Below 1 is unsustainable, 1-3 is marginal, 3-5 is healthy, and above 5 is excellent but can also suggest under-investment in growth.
Take warnings seriously when implied lifespan from churn differs from your entered lifespan by more than about 20%. That usually means your LTV is being flattered by optimistic assumptions rather than actual retention behavior.
Use the result to choose the highest-leverage fix: lower CAC, higher ARPU, better gross margin, or lower churn. If LTV:CAC is healthy but payback is still long, cash flow rather than profitability is the bottleneck and pricing or onboarding may matter more than top-line growth.
Re-run every month by channel, plan tier, or segment. Track LTV:CAC and payback together because ratios can improve while capital efficiency still worsens if gross contribution takes too long to recover CAC.

AI Integrations

Contract, discovery endpoints, and developer notes for agent use.

Always available for agents

Tool contract JSON

https://aibizhub.io/contracts/unit-economics-calculator.json

Stable input and output contract for this exact tool.

Human review

People can use the browser page to sense-check outputs and charts, but agents should still execute against the contract and discovery endpoints.

/agent-tools.json - machine-readable tool index.
/llms.txt - human-readable model discovery guide.
/.well-known/webmcp.json - WebMCP capabilities manifest.
/.well-known/ai-plugin.json - plugin-style discovery manifest.

{
  "tool": "unit_economics",
  "cac": 150,
  "monthly_arpu": 49,
  "gross_margin_percent": 75,
  "avg_lifespan_months": 24,
  "monthly_churn_percent": 3
}

Open tool contract JSON Open AI integrations guide

Expand developer notes

Agent playbook

Resolve Unit Economics Calculator from /agent-tools.json and open its contract before execution.
Validate inputs against the contract schema instead of scraping labels from the page UI.
Open the browser page only when a person wants to review charts, assumptions, or related tools.

Agent FAQ

Should ChatGPT, Claude, or another agent click through the UI?

No. Start with /agent-tools.json, then follow the tool's contract URL. The page UI is for human review, not parameter discovery.

When do tools show Quick and Advanced?

Every tool opens in Quick Start first. Advanced Controls keeps the same scenario, reveals more assumptions or diagnostics, and every tool keeps AI integrations inline below the instructions.

When should an agent still open the browser page?

Open it when a human wants to sense-check the output, review the chart, or keep exploring related tools after the calculation finishes.

Questions people usually ask

What is a good LTV:CAC ratio?

3:1 or higher is generally considered healthy. Below 1:1 means you spend more to acquire a customer than they're worth. Above 5:1 may indicate you're under-investing in growth.

How is this different from the CLV calculator?

The CLV calculator focuses on computing customer lifetime value in isolation. This tool combines CAC, LTV, payback, and viability scoring into a single decision framework for business model assessment.

Why does churn rate matter if I set lifespan manually?

Churn provides a cross-check. If your stated lifespan implies much lower churn than your actual rate, the tool warns you — your LTV projection may be optimistic.

Is this tool free and private to use?

Yes. All calculations run locally in your browser. No data is sent to any server, no account is required, and no cookies are set.

Related Resources

Learn the decision before you act

Every link here is tied directly to Unit Economics Calculator. Use the explanation, formula, examples, and benchmarks to pressure-test the calculator output from first principles.

Browse all 12 resources

Checklists · 2 Learn · 1 Tips · 2 Mistakes · 1 Formulas · 3

How To Use

5 STEPS

How to Use Unit Economics Calculator

Master your business's profitability per unit with this guide. Learn to calculate LTV, CAC, and gross margins to optimize growth and financial health.

Read

Formula

3 VARIABLES

CAC Payback Formula

Master the CAC Payback Formula to understand how quickly your business recoups customer acquisition costs, crucial for evaluating marketing efficiency and cash flow in unit economics.

Read

Formula

3 VARIABLES

LTV CAC Ratio Formula

Understand the LTV CAC Ratio formula, a crucial unit-economics metric. Learn how to calculate customer lifetime value against acquisition cost to assess business health and profitability for sustainable growth.

Read

Formula

3 VARIABLES

Unit Economics Formula

reveal the core of business profitability with the Unit Economics Formula. Learn to calculate Contribution Margin, understand per-unit revenue and costs, and drive smarter decisions for your venture.

Read

Examples

4 EXAMPLES

Unit Economics Examples

Explore practical unit economics examples across SaaS, e-commerce, and services. Learn to calculate CLTV, contribution margin, and project profitability for smarter business decisions.

Read

Checklist

19 ITEMS

Break-Even Analysis Checklist

Master your business's financial health with this actionable break-even analysis checklist. Pinpoint costs, calculate your profit threshold, and strategize for sustainable growth.

Read