Net revenue retention and gross margin dominate SaaS earnings calls. Both are important, but our analysis of 180 public SaaS companies across three market cycles shows that the sales efficiency ratio — the ratio of new ARR to sales and marketing spend — is a stronger leading indicator of future gross margin pressure than either of the metrics the market watches most closely.
Why sales efficiency predicts margin better
When sales efficiency deteriorates, the company is paying more to acquire each dollar of recurring revenue. This dynamic precedes gross margin compression by an average of 2.4 quarters in our dataset — long enough that an analyst watching efficiency ratios can anticipate margin moves that the consensus misses.
The screening implication
In a portfolio screening context, companies with declining sales efficiency ratios but still-healthy gross margins are candidates for margin compression within the next two to three quarters. The combination of high gross margin and deteriorating sales efficiency was present in 78% of the companies in our dataset that subsequently experienced gross margin compression of more than 300 basis points.