The right SaaS opex spend ratios

Sammy Abdullah
3 min readMay 8, 2023

The general rule of thumb for spending in SaaS is 40/40/20. In other words, 40% of operating expense should be on R&D, 40% should be on sales and marketing, and 20% should be on G&A. Rules of thumb are just generalizations, so we wanted to see what the data really is. 73 SaaS companies have gone public since October 2017 and below are their margins. Perhaps the rule of thumb should be 30/50/20. The data is below.

30/50/20. On median, 27% of opex is R&D, 48% is on sales and marketing, and 22% is on G&A. So we believe “30/50/20” on R&D/S&M/G&A may be more accurate.

There are outliers. Rules of thumb are just general guidelines, and sure enough there are significant outliers. 45% of Dropbox’s spend was on R&D while only 13% of Zoom’s spend was on R&D. Similarly, 73% of Zoom’s spend was on sales & marketing, Dropbox spent only 37% on S&M, and spent 28% on S&M. Snowflake spent a whopping 130% of revenue on S&M and indeed their EBITDA margin is the worst of the bunch at -192%.

Don’t let G&A be the outlier. Obviously you should minimize spend on G&A. Building product and selling it should be the priorities. Cloudflare, Sendgrid, Snowflake, and Palantir are violators of this mantra (they spend 36%, 34%, and 37%, and 43% of opex on G&A).

COGS isn’t 20%. The other rule of thumb that needs to be debunked is that COGS is 20% of revenue. The median and averages are 29%. Below you can see percent of revenue calculations.

Sammy is the Managing Partner and Co-Founder of Blossom Street Ventures. Visit us at and email directly at We invest in companies with run rate revenue of $3mm to $30mm, with year over year growth of 20% to 100%+ depending on revenue. We lead or follow in growth rounds and special situations like inside rounds, small rounds, rushed rounds, corralling investors with our term sheet, cap table clean up, and extensions. We can commit in 3 weeks and our check is $1mm to $4mm. Also visit for always up-to-date SaaS metrics.