What is the Magic Number?
Magic Number is a SaaS sales efficiency metric that measures how much new annualised recurring revenue (ARR) a company generates for every dollar spent on Sales and Marketing (S&M) in the prior period. Coined by Scale Venture Partners and popularised by Lars Dalgaard, Magic Number is widely used by growth-stage investors to assess whether incremental S&M spend produces proportional growth — i.e., whether the go-to-market motion is scaling efficiently.
Magic Number formula
Magic Number = (Current Quarter ARR – Prior Quarter ARR) × 4 / Prior Quarter S&M Spend
- Numerator: annualised net new ARR added in the current quarter.
- Denominator: S&M spend in the prior quarter (lagged because S&M investment generates revenue with delay).
- Result: dollar of new ARR generated per dollar of S&M.
Magic Number benchmarks
- <0.5: S&M inefficient — pause growth investment, optimise.
- 0.5-0.75: mediocre; review channel mix, sales productivity.
- 0.75-1.0: efficient — consider scaling S&M.
- >1.0: highly efficient; aggressive growth investment justified.
- >1.5: exceptional — common at early-stage product-led growth companies.
Magic Number caveats
- Excludes expansion: uses net new ARR which captures expansion AND new logo; some variants split for clearer signal.
- Lag mismatch: S&M payback varies by segment (SMB 3-6 months, enterprise 12-18 months); single-quarter lag may misstate.
- Macro distortion: demand spikes/collapses (COVID-era SaaS boom) inflated Magic Numbers temporarily.
- Gross vs. net Magic Number: gross uses Net New ARR; net subtracts churn-driven attrition; net is more honest at scale.
Türk SaaS pazarında Magic Number
Türk SaaS’ler Magic Number’ı yerli (TL-fiyatlı) ve uluslararası (USD-fiyatlı) segmentler için ayrı hesaplamalıdır; TL volatilite quarter-to-quarter ARR hesabını çarpıtabilir. KOBİ-odaklı Türk SaaS’ler (Logo, Mikro, Loops AI) için tipik Magic Number 0,6-1,0 aralığında; uluslararası odaklı (Insider, Foriba) yüksek Magic Number’a ulaşabilir. Türk lokal pazarda S&M kanalları (LinkedIn ads vs. event sponsorship vs. inside sales) verimliliği farklıdır; segment-bazlı analiz kritik.
Do: calculate gross and net Magic Number separately; track quarterly trend, not single-quarter snapshots; segment by channel for sub-metric analysis.
Don’t: treat Magic Number as the sole growth-efficiency metric — combine with CAC payback, Burn Multiple, and Rule of 40 for full diagnosis.