CAC Forecast Model

Build channel-level acquisition cost projections and align budgets to payback realities.

Use this model to set CAC guardrails, pressure test scenarios, and decide where to scale or pull back.

  • Inputs Snapshot

    Capture spend, expected conversion rates, and average order values per channel.

    Formula: CAC = Spend / New customers

    Start with realistic baselines before adding growth assumptions.

  • Channel Benchmarks

    Compare historical CAC to target ranges by channel and objective.

    Signal: CAC vs. LTV threshold

    Flag channels that are outside acceptable payback windows.

  • Time Horizons

    Project CAC weekly, monthly, and quarterly to account for lagging conversion effects.

    Assumption: Conversion lag by channel

    Align forecasts with reporting cadence and cash flow timing.

  • Scenario Planning

    Model conservative, base, and aggressive CAC outcomes to surface risk.

    Variable: CPM + CVR shifts

    Stress test the plan before committing budget.

  • Payback Targets

    Set acceptable payback periods based on cash constraints and growth goals.

    Formula: Payback = CAC / Gross margin

    Prioritize channels that meet your payback guardrails.

  • Decision Signals

    Translate the forecast into scale, maintain, or pause recommendations.

    Output: Budget allocation guidance

    Make the forecast actionable for weekly planning meetings.