Venture Finance & Capital Efficiency Lab

Burn Multiple & Capital Efficiency Calculator

Diagnose David Sacks' Burn Multiple, evaluate cash burn pacing against net new ARR expansion, calculate true cash runway, and benchmark fundraising readiness.

1. Burn & ARR Inputs

$
Total cash, cash equivalents, and short-term Treasuries in bank accounts.
Annual periods smooth seasonal booking variations.
$
Cash collections minus cash disbursements during the evaluation window.
$
Contracted Annual Recurring Revenue at start of period.
$
Contracted Annual Recurring Revenue at end of period.
$
Monthly unadjusted cash expenditures (payroll, marketing, servers).

2. Capital Efficiency & Runway Diagnostics

Evaluating...
Burn Multiple
1.14x
Good Tier (1.0x-1.5x)
Net New ARR Added
+$4.20M
+70.0% YoY Growth
Monthly Net Burn
$400.0K
Gross: $750.0K
Cash Runway
18.8 Mos
Fundraise Window

3. David Sacks Craft Ventures Efficiency Matrix

Benchmark Tier Burn Multiple Range Capital Efficiency Rating Venture Fundraising Outlook

Capital Consumption Synthesis

Cost to Buy $1 of ARR: $1.14 of Cash Burn
Runway Depletion Pacing: 5.3% of Reserves / Month

4. Burn Multiple Sensitivity: Net Burn ($) vs. Net New ARR ($)

Projected Burn Multiples across cash burn discipline and sales velocity variations.

  Current operational pacing highlighted in light blue. Multiples ≤ 1.50x indicate institutional venture fundraising health.

Managerial Economics: The Power of the Burn Multiple

Why Burn Multiple Surpasses CAC Payback

Most software founders focus heavily on Customer Acquisition Cost (CAC) payback periods to justify hiring sales reps. However, CAC payback ignores product engineering, general administrative costs, hosting infrastructure, and customer churn. David Sacks introduced the Burn Multiple to capture total institutional capital drag:

$$\text{Burn Multiple} = \frac{\text{Net Burn}}{\text{Net New ARR}} = \frac{\text{Cash Inflows} - \text{Cash Outflows}}{\text{Ending ARR} - \text{Beginning ARR}}$$

If a startup burns $5M in cash to add $2.5M of Net New ARR, its Burn Multiple is 2.0x. The business consumes $2.00 of equity investor capital for every dollar of recurring top-line revenue generated.

Managing Runway & Venture Fundraising Windows

In competitive venture capital markets, a high Burn Multiple (>2.0x) triggers severe down-round risk or structure-heavy financing. Maintaining an efficient Burn Multiple under 1.25x extends cash runway naturally:

$$\text{Cash Runway (Months)} = \frac{\text{Total Cash Balance}}{\text{Monthly Net Burn}}$$

Companies with 18+ months of runway and a sub-1.2x Burn Multiple negotiate growth equity rounds from a position of strength, avoiding forced dilutive emergency bridges.

Frequently Asked Questions

The Burn Multiple is a venture capital capital efficiency metric developed by Craft Ventures' David Sacks. It measures how much cash a startup burns to generate each incremental dollar of Annual Recurring Revenue (ARR): Burn Multiple = Net Burn / Net New ARR. A lower score reflects higher efficiency.

Institutional venture benchmarks define: Under 1.0x as "Amazing" (spending less than $1 of cash for every $1 of new ARR added); 1.0x to 1.5x as "Good"; 1.5x to 2.0x as "Suspect" (acceptable for early seed-stage companies but unsustainable at scale); and Over 2.0x as "Bad" or "Distressed" (burning $2+ for every $1 of growth).

Gross Burn represents total monthly cash outflows (salaries, hosting, office, marketing). Net Burn is total cash cash outflows minus cash cash inflows (customer collections). Net Burn reflects the true monthly net cash deficit reducing the company's bank balance.

While Customer Acquisition Cost (CAC) Payback only measures direct sales and marketing spend, the Burn Multiple encompasses all company operating costs—including engineering salaries, G&A, management overhead, and customer churn. It answers the holistic question: How much total cash was spent across the entire organization to produce net recurring growth?

Early-stage companies (under $2M ARR) often experience higher Burn Multiples (1.5x to 2.5x) as product-market fit is established and initial engineering teams are staffed. Growth-stage companies ($10M+ ARR) must operate at 1.0x to 1.3x or lower to achieve favorable Series B/C valuations and avoid severe dilution.