How much should the whole GTM org cost, and how do I know when we are overspending?

One number that tells you whether your whole GTM spend is working, with current benchmark bands (under 0.5 underinvesting, 0.75 to 1.0 efficient, over 1.0 exceptional) and the precise definition of what to include in the spend.

How to Calculate the SaaS Magic Number

From The SaaS CFO by Ben Murray 8 min read

• Magic number = (this quarter's ARR minus last quarter's ARR) times 4, divided by last quarter's sales and marketing spend.
• Above 0.75 means step on the gas; 1.0 or better is the efficient zone.
• A magic number of 1.0 implies you paid back customer acquisition cost inside a year.
• It only reads true on short sales cycles: with a 12 month enterprise cycle, use trailing twelve month figures instead.

The headcount question answered as arithmetic: revenue target divided by revenue per rep and capacity utilisation, with ramp time and attrition built in. Use it before you sign off next quarter's hiring plan.

Sales Capacity Planning

From Everstage 12 min read

• Reps spend only about 30 percent of the week actually selling, the rest goes to admin and quoting.
• Capacity formula: revenue target divided by (revenue per rep times utilization), so 5M at 400K and 0.6 needs about 21 reps.
• Mid-market B2B SaaS reps carry 200K to 500K a year; enterprise reps 500K to 750K.
• Assume 60 percent capacity utilization and revisit the plan at least quarterly.

The clearest arithmetic anywhere on rep economics: the rule of 10 for quota against base, four months to productivity, draws during ramp, and why teams attain about 70 percent of quota capacity so you must plan over capacity.

Simple Math to Set Up a Sales Team

From Craft Ventures by David Sacks 12 min read

• Rule of 10: an AE's quota is 10x base salary, and the standard SaaS commission rate is 10 percent of ARR.
• Pay a 50/50 base to variable split, then accelerate to 15 percent commission past quota.
• Plan for a 4 month ramp and about 70 percent average team attainment, so carry excess quota capacity.
• Set a manager's quota at 80 percent of their team's capacity; below 400K new ARR per AE, sales-led may not pencil.

Roughly 47,000 quota carrying reps across 246 companies, with average attainment at 42.7 percent. The number to put in front of a board that thinks your team is underperforming when the quota is what is broken.

57% of SaaS Sales Reps Missed Quota in Q2 2025. Here's What That Means

From QuotaPath, using RepVue's Cloud Sales Index 8 min read

• 57.31 percent of SaaS reps missed quota in Q2 2025, across 246 companies and about 47,000 quota carriers.
• Average quota attainment was 42.69 percent, less than half of target.
• The quotas were built on growth assumptions from a different market, and comp plans never adjusted to longer cycles.
• When most sellers cluster far below quota, comp stops working as a performance signal at all.

Knowing your magic number is the easy part. Sapphire's investors walk through what they do about a bad one, which spend to cut and which segment is quietly subsidising another, using benchmarks from across their portfolio.

How to Double Your Magic Number and Increase Your Go-to-Market Efficiency with Sapphire Ventures

On SaaStr 22 min