What's a good SaaS Magic Number?

Median for healthy SaaS: 0.6-0.8. Top quartile: 1.0+. Companies preparing to IPO typically show 0.7-1.2 for several quarters. Below 0.5 = burning capital inefficiently. Above 1.5 = under-investing in growth (you could be growing faster). The 'right' number depends on stage and growth goal: early-stage companies should target 1.0+ (investing aggressively) while later-stage should target 0.6-0.8 (balancing growth and efficiency).

How does Magic Number differ from CAC payback period?

Magic Number is dollar-in / dollar-out efficiency on a portfolio basis. CAC payback is months until cumulative gross profit from a customer equals their CAC. They're related but measure different things. CAC payback 0.7 typically describe the same healthy company. CAC payback handles gross margin explicitly; Magic Number assumes 100% gross margin (so it overstates efficiency for low-margin businesses). Use both metrics together.

Why use prior-quarter S&M spend?

Sales cycles take time. Spend you make in Q1 typically generates revenue in Q2 (or later for enterprise). Using prior-quarter spend matches the lag. Some companies use trailing 2-quarter average S&M to handle longer sales cycles. The exact lag depends on your sales motion: PLG (product-led growth) is roughly same-quarter; SMB sales is 1 quarter lag; enterprise is 2-4 quarters. Adjust the formula to match your business; the standard 1-quarter lag is a starting point.

Should I include marketing in S&M?

Yes. The metric is sales-AND-marketing combined: salesforce, sales commissions, sales tools, BDR/SDR salaries, marketing programs (paid acquisition, events, content), marketing salaries, marketing tools. The full bill of getting a customer from awareness to closed deal. Some companies separate 'CAC by channel' (paid vs organic vs sales-led), but Magic Number aggregates because the ARR doesn't tell you which channel sourced it.

How do I improve Magic Number?

Two levers: increase numerator (Net New ARR) or decrease denominator (S&M spend). Numerator levers: improve close rates (better qualification, shorter cycles), increase ASP (price up, sell larger packages), reduce churn (better onboarding, customer success investment). Denominator levers: cut bottom-decile reps, reduce paid acquisition (often inefficient at scale), shift from outbound to inbound, automate top-of-funnel. The most powerful lever for most companies is reducing churn — every churned customer means you have to acquire a replacement just to stand still, which kills Magic Number.

What's the difference between gross and net Magic Number?

Gross Magic Number uses Gross New ARR (only new logo + expansion, ignores churn and contraction). Net Magic Number uses Net New ARR (subtracts churn). Gross looks better but is misleading for high-churn businesses. Net is the conservative metric and what most VCs benchmark against. Both are useful: Gross tells you about new-business efficiency; Net tells you about portfolio-level efficiency including retention. Best-in-class companies show both Gross > 1.0 and Net > 0.7.

Career & Growth · Free tool

SaaS Magic Number Calculator

Calculate (net new ARR x 4) / S&M spend instantly. Above 1.0 push more spend, below 0.5 slow down. Free browser-only tool, no sign-up needed.

Updated June 2026

Net new ARR this quarter ($)S&M spend this quarter ($)

Magic Number

4.80

(Net new ARR × 4) / S&M spend

Efficiency tier

Great — push more spend

Each sales & marketing dollar returns strong ARR. Consider accelerating hiring and paid channels.

If this quarter continues for a year

Projected annual ARR added: $2,400,000
Projected annual S&M spend: $2,000,000
ARR added per $1 of S&M: $1.20

Benchmark rule

> 1.0 — Pour fuel on the fire
0.75 – 1.0 — Keep investing, tune the funnel
0.5 – 0.75 — Pause scaling, fix conversion
< 0.5 — Slow spend and re-examine ICP

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What it does

Calculate the SaaS Magic Number, the VC-favorite sales-and-marketing efficiency metric: (Net New ARR for the quarter × 4) / S&M spend in the previous quarter. The formula compares annualized new revenue against the dollars you spent acquiring it. Magic Number above 1.0 means S&M is paying back in under a year (you should invest more); 0.5-1.0 is healthy; 0.5-0.7 is the median benchmark; below 0.5 means S&M is inefficient and you should reduce spend or fix the funnel.

Why VCs care: SaaS Magic Number is one of the cleanest signals of capital-efficient growth at scale. Most companies in expansion stage face the same dilemma: should they double S&M spend to grow faster, or reduce spend and grow slower but more profitably? Magic Number gives a numerical answer. At 1.5+ you’re leaving money on the table — every dollar spent on S&M generates more than a dollar in ARR; investors will fund growth. At 0.3, you’re burning capital — the marginal dollar of S&M doesn’t generate proportional ARR; cut spend, fix the funnel, then re-invest. Most series B-C SaaS companies hover around 0.6-0.9 in healthy growth modes.

Limitations to know: (1) Magic Number assumes constant gross margin and retention; high-churn companies look efficient on paper but actually destroy capital. (2) The metric uses ARR (annualized) but S&M is a quarterly cost — there’s a 1-2 quarter lag between sales investment and revenue recognition. Use 4-quarter trailing averages to smooth this. (3) Pure new-logo Magic Number tells a different story than blended (new logo + expansion); track both. Expansion is typically more efficient (existing customer relationships) so blending makes the number look better. (4) Doesn’t adjust for sales cycle length — 18-month enterprise cycles look worse on Magic Number than 30-day SMB cycles even if both end up profitable. Pair Magic Number with CAC payback period (months for cumulative gross profit to equal CAC) and LTV/CAC ratio for a complete picture.

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How to use it

Calculate Net New ARR for the most recent quarter: New customer ARR + Expansion ARR − Contraction ARR − Churn ARR. Use ARR (annualized) not MRR.
Pull S&M spend from the prior quarter — typically 1 quarter lag between when you spend and when revenue lands. Include sales salaries + commissions + sales tools + marketing programs + marketing salaries.
Compute Magic Number: (Net New ARR × 4) / Prior-quarter S&M spend. Multiplying ARR by 4 annualizes a quarterly snapshot.
Compare to benchmarks: < 0.5 inefficient (cut spend); 0.5-0.75 healthy median; 0.75-1.0 strong; > 1.0 underspending (invest more in S&M).
Track quarter-over-quarter trend more than absolute number. A 0.6 trending up to 0.8 is a buying signal; 0.8 trending down to 0.6 is a warning.
Cross-check with CAC payback (target under 18 months for healthy SaaS) and Net Revenue Retention (target over 110% for best-in-class).

When to use this tool

Quarterly board meetings — Magic Number is a standard metric VCs and board members expect.
Deciding whether to scale S&M — if Magic Number is over 1.0, the answer is 'yes, invest more.'
Pre-fundraise diagnostics — investors evaluating your business model will look at trailing 4-quarter Magic Number trend.
Comparing your efficiency to public SaaS comps — quarterly investor calls disclose Magic-Number-equivalent metrics.

When not to use it

Very early stage (< $1M ARR) — quarterly numbers are too noisy to compute meaningfully; use unit economics instead.
Hardware, services, or hybrid business models — Magic Number is designed for pure-SaaS recurring revenue.
When you don't trust your S&M cost allocation — companies that don't separate sales from marketing or that bury costs in 'G&A' will get garbage numbers.
When churn or contraction dominate — Magic Number can mask high-churn problems; pair with retention metrics always.

Common use cases

Quick calculation during a typical workday
Pre-decision sanity-check on inputs and outputs
Educational use — demonstrating the underlying concept
Onboarding a colleague who needs the same calculation/conversion

Frequently asked questions

What's a good SaaS Magic Number?: Median for healthy SaaS: 0.6-0.8. Top quartile: 1.0+. Companies preparing to IPO typically show 0.7-1.2 for several quarters. Below 0.5 = burning capital inefficiently. Above 1.5 = under-investing in growth (you could be growing faster). The 'right' number depends on stage and growth goal: early-stage companies should target 1.0+ (investing aggressively) while later-stage should target 0.6-0.8 (balancing growth and efficiency).
How does Magic Number differ from CAC payback period?: Magic Number is dollar-in / dollar-out efficiency on a portfolio basis. CAC payback is months until cumulative gross profit from a customer equals their CAC. They're related but measure different things. CAC payback < 12 months and Magic Number > 0.7 typically describe the same healthy company. CAC payback handles gross margin explicitly; Magic Number assumes 100% gross margin (so it overstates efficiency for low-margin businesses). Use both metrics together.
Why use prior-quarter S&M spend?: Sales cycles take time. Spend you make in Q1 typically generates revenue in Q2 (or later for enterprise). Using prior-quarter spend matches the lag. Some companies use trailing 2-quarter average S&M to handle longer sales cycles. The exact lag depends on your sales motion: PLG (product-led growth) is roughly same-quarter; SMB sales is 1 quarter lag; enterprise is 2-4 quarters. Adjust the formula to match your business; the standard 1-quarter lag is a starting point.
Should I include marketing in S&M?: Yes. The metric is sales-AND-marketing combined: salesforce, sales commissions, sales tools, BDR/SDR salaries, marketing programs (paid acquisition, events, content), marketing salaries, marketing tools. The full bill of getting a customer from awareness to closed deal. Some companies separate 'CAC by channel' (paid vs organic vs sales-led), but Magic Number aggregates because the ARR doesn't tell you which channel sourced it.
How do I improve Magic Number?: Two levers: increase numerator (Net New ARR) or decrease denominator (S&M spend). Numerator levers: improve close rates (better qualification, shorter cycles), increase ASP (price up, sell larger packages), reduce churn (better onboarding, customer success investment). Denominator levers: cut bottom-decile reps, reduce paid acquisition (often inefficient at scale), shift from outbound to inbound, automate top-of-funnel. The most powerful lever for most companies is reducing churn — every churned customer means you have to acquire a replacement just to stand still, which kills Magic Number.
What's the difference between gross and net Magic Number?: Gross Magic Number uses Gross New ARR (only new logo + expansion, ignores churn and contraction). Net Magic Number uses Net New ARR (subtracts churn). Gross looks better but is misleading for high-churn businesses. Net is the conservative metric and what most VCs benchmark against. Both are useful: Gross tells you about new-business efficiency; Net tells you about portfolio-level efficiency including retention. Best-in-class companies show both Gross > 1.0 and Net > 0.7.

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