DFWStrategy

LTV:CAC Ratio Calculator

Calculate whether your customer acquisition costs are sustainable. See how your ratio compares to industry benchmarks.

Calculate Your LTV:CAC Ratio
Enter your profit LTV (gross profit over customer lifetime) and acquisition cost to assess sustainability.
$

Use Profit LTV from the LTV calculator (Revenue LTV × Gross Margin)

$

Marketing + sales cost per customer

LTV:CAC Ratio

Healthy

4:1

Net Profit per Customer

After acquisition cost

$1,300

CAC as % of LTV

Acquisition investment

28%

Healthy: Your acquisition economics are sustainable. Each customer generates significantly more gross profit than they cost to acquire, leaving room for operating expenses and growth.

Understanding LTV:CAC Ratio

The LTV:CAC ratio is one of the most important metrics for business sustainability. It answers a simple question: are you making more profit from customers than you spend to acquire them?

LTV:CAC Ratio = Profit LTV ÷ Customer Acquisition Cost

Example: $1,800 Profit LTV ÷ $500 CAC = 3.6:1 ratio

Use Profit LTV, not Revenue LTV

Always calculate this ratio using Profit LTV (gross profit over the customer lifetime), not Revenue LTV. If you use revenue, you'll overestimate sustainability since you're ignoring the cost of delivering your service. Our LTV calculator outputs both—use the Profit LTV number.

LTV:CAC Ratio Interpretation

Below 1:1

Unsustainable

Losing money on every customer

1:1 to 3:1

Marginal

Thin margins, risky

3:1 to 5:1

Healthy

Sustainable, profitable growth

Above 5:1

Excellent

Strong unit economics

The 3:1 Benchmark

The 3:1 rule is a useful starting point: for every dollar spent on acquisition, aim to generate at least three dollars in gross profit over the customer's lifetime.

Why 3:1 and not 2:1?

A 2:1 ratio looks profitable on paper, but leaves no room for operating expenses, overhead, or reinvestment. Remember: gross profit still needs to cover rent, salaries, insurance, and other fixed costs. The 3:1 target provides margin for operational costs, market changes, and sustainable growth.

However, context matters. A business with strong cash flow and low overhead might accept 2:1 to grow faster. A capital-constrained business or one with high fixed costs might need 5:1+ to ensure stability. Always factor in your specific cost structure.

Improving Your Ratio

Increase LTV

  • • Improve customer retention
  • • Increase purchase frequency
  • • Raise prices (with value)
  • • Add upsells/cross-sells
  • • Generate referrals

Decrease CAC

  • • Improve conversion rates
  • • Better ad targeting
  • • Invest in organic channels
  • • Reduce wasted spend
  • • Build referral programs

Frequently Asked Questions

Related Tools

LTV Calculator

Estimate the true lifetime value of your customers including repeat business and referrals. Critical for service businesses.

CAC Calculator

Calculate your cost to acquire each new customer. Compare CAC across channels to find your most efficient marketing spend.

Payback Period

Calculate how long until a new customer becomes profitable. Essential for managing cash flow in service businesses.

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