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LTGP-to-CAC Ratio: The Master Metric That Tells You Whether to Scale or Fix

The Framework

The LTGP-to-CAC Ratio from Alex Hormozi's $100M Leads is the single most important metric in advertising economics: Lifetime Gross Profit per customer divided by Customer Acquisition Cost. This ratio tells you whether your advertising is an investment (ratio above 3:1) or a money pit (ratio below 3:1). It determines whether to scale aggressively, optimize carefully, or stop advertising entirely until the underlying business economics improve.

The Math

LTGP (Lifetime Gross Profit): Total revenue generated by a customer over their entire relationship minus the direct costs of serving them. A gym member who pays $200/month for 14 months and costs $50/month to serve generates LTGP of ($200 - $50) × 14 = $2,100. A consulting client who pays $10,000 for a project that costs $3,000 in labor generates LTGP of $7,000.

CAC (Customer Acquisition Cost): Total advertising and sales spend divided by total new customers acquired in the same period. If you spent $10,000 on ads and sales last month and acquired 20 customers, your CAC is $500.

The Ratio: LTGP ÷ CAC. The gym example: $2,100 ÷ $500 = 4.2:1. The consulting example: $7,000 ÷ $500 = 14:1.

Hormozi's targets: Below 1:1 means you lose money on every customer — stop advertising and fix the offer or the economics. 1:1 to 3:1 means you're profitable but not efficiently enough to scale aggressively — optimize before scaling. Above 3:1 means scale — every additional dollar spent on advertising returns three or more dollars in gross profit.

Why 3:1 Is the Threshold

The 3:1 minimum accounts for overhead, cash flow timing, and variability. A 2:1 ratio means your LTGP is twice your CAC, which sounds profitable — but LTGP is realized over months or years while CAC is paid immediately. The cash flow gap between paying for customers now and receiving their lifetime value later creates working capital pressure that a 2:1 ratio can't sustain.

The 3:1 threshold provides enough margin to absorb: overhead costs not captured in LTGP (rent, software, admin), variability in both LTGP (some customers churn early) and CAC (some months are more expensive), and the time value of money (a dollar today is worth more than a dollar next year).

At 5:1 or above, Hormozi considers the advertising system highly efficient and recommends aggressive scaling — the economics are strong enough to survive market fluctuations, competitive changes, and operational hiccups.

The Ratio's Strategic Implications

The ratio diagnoses not just advertising health but business model health:

Low ratio, high CAC: Your advertising is inefficient. Solutions: better targeting (Puddle-to-Ocean), better creative (Call Out + Value + CTA), better landing pages, or cheaper channels (referrals, content).

Low ratio, low LTGP: Your business economics are weak. Solutions: increase prices (Grand Slam Offer from $100M Offers), reduce churn (better fulfillment), increase purchase frequency (upsells, continuity), or reduce cost of service.

High ratio: Scale everything. The business model works and the advertising is efficient. The only constraint is operational capacity.

Cross-Library Connections

Hormozi's Client Financed Acquisition from the same book adds a timing dimension to the ratio: even with a 5:1 LTGP-to-CAC ratio, if LTGP takes 18 months to realize, cash flow limits scaling. Client Financed Acquisition restructures revenue timing so that 30-day cash covers CAC, enabling scale regardless of long-term ratio.

Hormozi's Value Equation from $100M Offers is the tool for improving the LTGP numerator: engineer the offer to increase dream outcome and perceived likelihood (which enables higher pricing and lower churn) while reducing time delay and effort (which improves fulfillment cost).

Dib's Lean Marketing addresses the CAC denominator through efficiency: better targeting, better copy, better conversion optimization, and marketing assets (flagship assets, content) that generate leads at near-zero marginal cost. Dib's approach reduces CAC without reducing reach.

Wickman's 10-Year Thinking from The EOS Life provides the patience framework: businesses with strong ratios (5:1+) can afford to invest heavily in advertising today knowing the returns compound over years. Short-term thinkers see advertising cost; long-term thinkers see advertising return.

The ratio also reveals whether marketing spend is efficient at the channel level: a channel with LTGP:CAC of 10:1 deserves more budget, while a channel with 2:1 may be approaching diminishing returns. Hormozi's Core Four from $100M Leads provides the channel framework for this analysis — each of the four channels (warm outreach, cold outreach, content creation, paid ads) should be measured independently on LTGP:CAC to identify which deserves marginal budget allocation.

Implementation

  • Calculate your LTGP today. Average revenue per customer × average retention period × gross margin percentage.
  • Calculate your CAC today. Total ad spend + total sales costs ÷ new customers acquired.
  • Divide LTGP by CAC. If below 3:1, focus on improving the ratio before scaling. If above 3:1, you have permission to spend more on advertising.
  • Identify which lever to pull. Low LTGP? Improve the offer, retention, or pricing. High CAC? Improve targeting, creative, or add cheaper channels.
  • Track monthly and trend over time. A declining ratio is an early warning. A rising ratio is confirmation that your improvements are working.

    • 📚 From $100M Leads by Alex Hormozi — Get the book