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08 / Tools / Unit Economics

LTV:CAC Ratio

Check whether acquisition economics are healthy.

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Inputs

Results

  • LTV : CAC

    6.40x

What is LTV:CAC?

The LTV:CAC ratio compares customer lifetime value to acquisition cost. It answers a simple question: for every dollar spent to win a customer, how many dollars of lifetime value do you earn back?

Why is LTV:CAC Important?

  • Growth quality

    Separates efficient growth from spend that does not pay back.

  • Budget allocation

    Shows when to scale channels vs fix retention or pricing first.

  • Board reporting

    A standard efficiency snapshot alongside payback and NRR.

  • Channel ranking

    Highlights which acquisition motions deserve more capital.

  • Early warning

    A falling ratio often appears before cash-flow stress.

How is LTV:CAC Calculated?

Formula

LTV:CAC = Customer lifetime value ÷ Customer acquisition cost

Divide margin-based LTV by fully loaded CAC for the same customer definition and comparable time horizons.

Factors Affecting LTV:CAC

  1. 01

    LTV methodology

    Revenue LTV vs margin LTV changes the ratio dramatically.

  2. 02

    CAC completeness

    Omitting sales salaries understates true acquisition cost.

  3. 03

    Cohort timing

    Mismatching periods between LTV and CAC skews results.

  4. 04

    Expansion

    Strong NRR lifts LTV and improves the ratio over time.

  5. 05

    Channel mix

    Blended ratios hide inefficient paid programs.

  6. 06

    Payback cash

    A high ratio with slow payback can still strain runway.

LTV:CAC vs. Payback Period

LTV:CAC

  • Total lifetime value relative to acquisition cost.
  • Answers “is acquisition profitable over the life?”
  • Can look strong even when cash recovery is slow.

Payback

  • Months to recover CAC from contribution.
  • Answers “how fast do we get cash back?”
  • Critical for capital-constrained teams.

Read both together — ratio for profitability, payback for cash timing.

What is a LTV:CAC Calculator?

The LTV:CAC calculator divides lifetime value by acquisition cost so you can check whether your growth engine is economically healthy.

Benefits of Using a LTV:CAC Calculator

  • Instant health check

    See if you are near, above, or below common efficiency bands.

  • Scenario planning

    Model CAC or LTV changes before committing budget.

  • Channel comparisons

    Run ratios per acquisition motion.

  • Stakeholder clarity

    Explain efficiency in one number.

  • Paired metrics

    Use alongside payback and NRR for a full picture.

How to Use a LTV:CAC Calculator

  1. Step 1

    Enter LTV

    Use gross-margin LTV when possible.

  2. Step 2

    Enter CAC

    Use fully loaded sales & marketing CAC.

  3. Step 3

    Read the ratio

    Interpret as a multiple (e.g. 3.2×).

  4. Step 4

    Compare segments

    Repeat for each major channel or ICP.

What Is a Good LTV:CAC?

Many SaaS teams treat ~3:1 as a healthy target. Below ~1:1 usually means unprofitable acquisition. Above ~5:1 can mean you are under-investing in growth — unless capacity, brand, or market constraints justify restraint. Always pair with payback months.

Who's it for?

Founders & operators

Get a fast read on unit economics or channel efficiency without waiting on a spreadsheet rebuild.

Digital Marketers

Use this calculator to benchmark performance, allocate budget, and brief stakeholders with a clear, shared metric.

Agencies & growth teams

Standardize reporting across clients and campaigns, and turn calculations into optimization recommendations.

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