The test of whether growth pays
Spending to win customers only makes sense if a customer is worth more than they cost. The LTV to CAC ratio puts those two numbers side by side and tells you whether your growth engine builds or drains the business.
A ratio near 3 to 1 is a common healthy benchmark. Far below that, you are buying customers at a loss; far above it, you may be under-investing and could grow faster. You move it by raising lifetime value, through repeat sales and retention, or by lowering acquisition cost.