Growth Metrics That Actually Predict Success

1. 30-Day Cohort Repeat Purchase Rate Trend

The repeat purchase rate of customers acquired in the most recent months, measured at 30 days and tracked as a trend over the prior six months. Improving trend: the business is getting better at acquiring and serving customers who find genuine value. Declining trend: the recent customer acquisition is producing lower-quality cohorts the sign of audience saturation, product-market fit weakening with scale, or operational quality degradation eroding the customer experience. This metric predicts revenue sustainability 60 to 90 days before the decline shows in revenue.

2. CAC-to-LTV Ratio Trend

The ratio of customer acquisition cost to projected lifetime value, tracked as a trend over the prior six months. A stable or improving ratio confirms that each new customer acquired is generating sustainable value at the current acquisition cost. A declining ratio signals that either CAC is rising faster than LTV or LTV is declining faster than CAC falls both are indications that the current acquisition strategy will produce diminishing returns before the revenue trend reflects it.

3. Contribution Margin Per Order Direction

The trend in contribution margin per order over the prior three months specifically whether it is improving, stable, or declining. A declining trend while revenue is growing indicates that the cost structure is scaling faster than the gross margin the margin compression described in the article on profit margins shrinking with growth. This metric predicts a future profitability crisis before it appears in net margin, because it is upstream of the fixed cost allocation that would obscure the variable cost deterioration.

4. Organic Acquisition Share

The percentage of new customers arriving through non-paid channels (direct search, referral, organic social, word-of-mouth) over the prior three months, tracked as a trend. An increasing organic share indicates improving brand strength the brand is building the word-of-mouth and awareness that reduces dependency on paid acquisition. A declining organic share indicates increasing paid acquisition dependency the business is becoming more expensive to maintain as it grows larger.

5. Net Promoter Score by First-Delivery-Experience Cohort

The NPS of customers who received their first order on time versus customers who experienced a delivery delay, tracked monthly. A narrowing gap between these cohorts indicates improving delivery consistency. A widening gap indicates that operational quality is not keeping pace with volume a leading indicator of the retention deterioration that will appear in cohort data 60 to 90 days later.

6. Cash Conversion Cycle Trend

The trend in the number of days between inventory purchase payment and revenue collection over the prior six months. A lengthening CCC indicates that the business is becoming more working-capital-intensive as it grows a sustainability risk if the working capital facility has not grown proportionally. A stable or shortening CCC indicates effective working capital management. This metric predicts cash flow stress before the cash balance itself reaches the danger threshold.