Magic Number
Also known as: SaaS Magic Number, Sales Efficiency
Definition
Magic Number estimates how efficiently sales and marketing spend converts into recurring revenue. A common formula is net new ARR in the current quarter divided by prior-quarter sales and marketing spend, often annualized. It is useful directionally but must be interpreted with CAC payback, gross margin, expansion, and sales-cycle length.
Magic Number is valuable when the underlying data is clean. It is misleading when sales and marketing spend includes founder time, partner subsidies, implementation work, or customer-success expansion capacity.
Use it as a directional health check, not a board-level answer by itself.
Related terms
- Burn Multiple — A capital-efficiency metric that compares net cash burn to net new ARR. It shows how much cash a company spends to create each dollar of recurring revenue.
- CAC Payback — The number of months a SaaS firm needs to recover the fully-loaded sales-and-marketing cost of acquiring a customer. The leading indicator of capital efficiency.
- Pipeline Coverage — The ratio of qualified pipeline to sales target. Coverage indicates whether the team has enough real opportunities to hit the number.
Where this gets applied
- Revenue Architecture — ICP, deal-desk, sales-engineering ratios, MEDDPICC, deal-stage definitions. Move win rates from 29% to 68%.
- GTM Execution — Pipeline coverage, top-down/bottom-up motion, AE/SE ratios, comp realignment, partner-channel structure.
- Unit Economics — CAC payback, NRR, gross margin by segment, cohort analysis, paid-on-bookings vs. paid-on-cash.