Bessemer Efficiency Score: Formula, Benchmarks & How Investors Use It

Most SaaS founders know that burn rate matters. Most can tell you their monthly net burn within a few percentage points. Fewer can tell you how efficiently that burn is converting into new recurring revenue — which is exactly what the Bessemer Efficiency Score measures, and exactly what investors ask about in Series B and Series C due diligence.

The metric was formalized by Bessemer Venture Partners, one of the longest-tenured SaaS investors, as part of their Atlas framework for evaluating cloud companies. It answers a single question with precision: for every dollar this company burns, how many dollars of new ARR does it produce?

This guide covers the exact formula, what counts and what does not count in the calculation, the 2026 benchmarks Bessemer and peer investors use, how the metric sits alongside CAC Payback and the Rule of 40, a worked numerical example, the most common calculation errors, and a practical set of levers to improve your score before your next fundraise.

What the Bessemer Efficiency Score measures

The Bessemer Efficiency Score is a capital efficiency metric. It does not measure revenue growth in isolation, nor burn in isolation. It measures the ratio between the two — the amount of new recurring revenue created per dollar of cash consumed.

The intuition is straightforward. A company burning $1M per month to grow ARR by $2M per month is more efficient than a company burning the same amount to grow ARR by $500K. The efficiency score makes that difference explicit and comparable across companies.

Bessemer introduced this as part of their view that "efficient growth is more stable and reliable" than growth purchased at any cost. A company that can grow ARR at 100% while maintaining a score above 1.0 is a fundamentally different investment than one growing at 100% with a score of 0.3 — the latter may plateau or contract the moment capital conditions tighten, while the former has demonstrated that it can grow on its own terms.

The metric also functions as a management discipline tool, not just an investor communication tool. When a leadership team tracks the efficiency score quarterly, it surfaces the interaction between go-to-market spending, product velocity, pricing, and churn — all in a single ratio. For operators preparing for a Series A or Series B fundraise, the score becomes a north star for every headcount and budget decision.

The exact formula and its components

The formula has two inputs. Both require care in how they are defined.

Component 1: Net New ARR

Net New ARR is the change in Annual Recurring Revenue over the measurement period after accounting for all ARR movements — gains and losses. It is not the same as new bookings, new logos closed, or gross new ARR. It captures the net effect of all ARR-changing events during the period.

Each component has a precise definition:

• New ARR: ARR from customers who did not exist on the books at the start of the period. First-time contracts only.
• Expansion ARR: Additional ARR from existing customers — upsells, seat additions, tier upgrades, cross-sells. This is one of the highest-quality ARR movements because it requires no incremental acquisition cost.
• Churned ARR: ARR from customers who cancelled entirely during the period. A $30K annual contract that did not renew is $30K in churned ARR.
• Contraction ARR: ARR lost from customers who did not cancel but reduced their contract value — downgrading plans, removing seats, or negotiating lower rates. Often omitted from casual calculations but material in a rigorous analysis.

A company that adds $800K in new customer ARR, generates $200K in expansion from existing accounts, and loses $150K in churn plus $50K in contraction has a Net New ARR of $800K.

Component 2: Net Burn

Net burn is the actual cash consumed by the business after offsetting all cash revenue collected. It is the practical measure of how much capital the company requires to operate for the period.

Operating expenses include every line item the business spends to function: cost of goods sold (COGS), sales and marketing (S&M), research and development (R&D), and general and administrative (G&A). For most SaaS companies at the Series A to Series C stage, the largest line items are payroll, cloud infrastructure, and sales and marketing programs.

What to include in net burn:

• All salaries, benefits, and payroll taxes across every function
• Cloud infrastructure and hosting costs (AWS, GCP, Azure)
• Sales and marketing spend (paid acquisition, events, tools, commissions)
• Software subscriptions (Salesforce, HubSpot, Intercom, etc.)
• Office, facilities, and travel expenses
• Professional services (legal, accounting, HR)

What to exclude from net burn:

• Stock-based compensation (non-cash)
• Depreciation and amortization (non-cash)
• One-time restructuring charges or severance
• Capitalized software development costs (already excluded from opex on the P&L)
• Interest income from the company's cash balance (not an operating item)

Bessemer's own guidance, published in the cloud metrics framework on BVP Atlas, notes that cash figures tend to be "lumpy based on timing of collections and payables." For this reason, most investors prefer a trailing three-month sum or a quarterly figure — not a single month — to normalize the seasonal and timing distortions that affect both collections and expenses.

If the company is profitable (revenue exceeds operating expenses), net burn is negative. A negative net burn flips the efficiency score: a negative denominator with a positive Net New ARR numerator produces a negative score, which does not apply in the usual benchmark framework. Profitable companies use the Rule of 40 and free cash flow margin as their primary efficiency signals rather than the efficiency score.

2026 benchmarks and what they mean

Bessemer's published framework defines three performance tiers. These tiers have remained consistent in their structure, but the practical fundraising expectations around them have tightened since 2022 as the venture market rerated for efficiency.

Score	BVP Tier	Practical interpretation (2026)
Below 0.5	Concerning	Burning significantly more than you are growing in ARR. Requires a compelling narrative about why efficiency will improve materially in the next two to four quarters. Fundraising is harder and valuations reflect the risk.
0.5 – 1.0	Solid	Acceptable for early Series A companies investing heavily in GTM. By late Series A and Series B, investors expect to see the trend moving toward 1.0. A flat 0.6 across six quarters is a concern; a rising 0.6 → 0.9 trend is a positive signal.
1.0 – 1.5	Strong	Generating at least one dollar of new ARR per dollar burned. Strong performance at Series B and C. Investors at this tier focus more on growth rate and go-to-market repeatability than on efficiency concerns.
Above 1.5	Excellent	Best-in-class. Common in companies with strong product-led growth, high net revenue retention, or efficient enterprise sales motions. These companies command premium multiples and shorter diligence cycles.

The fundraising reality in 2026 is that the 0.5 floor that counted as "good" in BVP's original 2019 classification is now the minimum most Series B investors will accept before seriously engaging. Many top-tier firms have moved their informal threshold to 0.8–1.0 before term sheets materialize. The companies that raised at 0.3 in 2020 and 2021 were benefiting from a capital environment that no longer exists.

It is also worth noting that the benchmark is stage-sensitive. A seed-stage company at $1M ARR with a score of 0.4 is in a very different position than a Series B company at $15M ARR with the same score. At seed, a low score often reflects appropriate investment in product and early hiring before revenue catches up. At Series B, a score of 0.4 means the business has scaled its burn faster than its ARR growth, which is a structural warning sign.

Worked numerical example

Consider a B2B SaaS company called OperateAI, preparing for a Series B. Here is their quarterly performance over three consecutive quarters.

Metric	Q2	Q3	Q4
New customer ARR added	$480K	$540K	$620K
Expansion ARR	$90K	$110K	$130K
Churned ARR	($70K)	($60K)	($50K)
Contraction ARR	($20K)	($15K)	($10K)
Net New ARR	$480K	$575K	$690K
Total operating expenses	$720K	$760K	$800K
Revenue collected	$250K	$300K	$360K
Net Burn	$470K	$460K	$440K
Bessemer Efficiency Score	1.02	1.25	1.57

OperateAI's efficiency score moved from 1.02 to 1.57 over three quarters. The improvement came from three simultaneous dynamics: new customer ARR grew from $480K to $620K, net burn declined from $470K to $440K as the revenue base absorbed a larger share of fixed costs, and churn declined from $70K to $50K as the customer success motion matured.

This is the kind of trend line that creates conviction at a Series B. The investor does not need to take the founder's word that efficiency is improving — the numbers show it happening in real time. A company presenting this trajectory to Bessemer, Sequoia, or Insight is giving the investment team a reproducible data story, not a projection.

How Bessemer uses this metric in due diligence

Bessemer Venture Partners does not evaluate any single metric in isolation. The efficiency score is one node in a broader capital efficiency diagnostic that the firm runs on every prospective investment. Understanding how they use it helps founders prepare the right narrative and the right data package.

They request time series, not snapshots. Bessemer's diligence teams ask for the efficiency score across six to eight quarters. A single quarter with a score of 1.8 is interesting but not credible without context. A rising trend from 0.7 to 1.4 over eight quarters demonstrates that the company has figured out how to grow ARR faster than it scales burn — a proof of operational discipline, not a lucky quarter.

They triangulate against CAC Payback. The efficiency score measures burn against ARR creation at the company level. CAC Payback measures the time required for a customer's gross profit contribution to recover the cost of acquiring them. A company with a strong efficiency score but a 36-month CAC Payback is growing efficiently in aggregate but acquiring individual customers at a loss for three years — a mix that is fragile if revenue growth slows. Bessemer's due diligence framework, published on BVP Atlas, targets CAC Payback of 0 to 6 months (best), 6 to 12 months (better), and 12 to 18 months (good) for the companies they back.

They look at gross margin alongside it. Two companies can show the same efficiency score while having very different unit economics. A company with 80% gross margins that generates $1M in Net New ARR from $800K in burn has far more operating leverage than a company with 50% gross margins achieving the same ratio. Gross margin ultimately determines how much of that ARR contribution flows to free cash flow as the company scales. Bessemer's benchmark data for the companies in their Cloud 100 report shows gross margins of 70–80% at the Series B to Series C stage.

They pair it with Net Dollar Retention. A high efficiency score built on new logo acquisition is more fragile than one supported by strong expansion revenue. If the company is landing customers at a loss and then expanding them significantly, the efficiency score will look healthy because expansion ARR has zero acquisition cost. But if churn is high and the expansion machine is not yet proven, the score will deteriorate as the install base ages. Bessemer looks for NDR above 120% at the Series B stage, paired with an improving efficiency score, as the combination that signals a durable business — not just a fast-growing one. For more on retention benchmarks, see the SaaS unit economics framework.

They use it to pressure-test the funding ask. When a founder proposes raising $12M at a Series B, Bessemer will model what the efficiency score implies about how far that capital should take the business. If the company currently burns $500K per month with a score of 1.2, a $12M raise represents 24 months of runway. The question then becomes: what ARR level should the company reach on $12M of capital given that efficiency score? If the math does not produce a credible Series C profile, the amount is wrong, the efficiency assumption is wrong, or both.

How the efficiency score relates to CAC Payback and Rule of 40

These three metrics appear in nearly every institutional SaaS fundraising conversation. They are related but distinct. Using them correctly means knowing what each one measures and when each one applies.

Metric	Formula	What it measures	Most relevant stage
Bessemer Efficiency Score	Net New ARR / Net Burn	Company-wide ARR creation per dollar of cash consumed	Pre-revenue to $30M ARR
CAC Payback Period	CAC / (ACV × Gross Margin)	Months to recover the cost of acquiring one customer	Series A through Series C
Rule of 40	ARR Growth % + FCF Margin %	Balance between growth and profitability as a single score	$25M ARR and above

The Bessemer Efficiency Score focuses on the aggregate relationship between ARR creation and cash consumption. It does not distinguish between a company that grew ARR through five large enterprise deals versus fifty SMB deals — both produce the same numerator if the Net New ARR figure is the same. CAC Payback fills that gap by measuring the economics of individual customer acquisition — particularly whether the go-to-market motion is efficient at the unit level.

The SaaS Magic Number is a closely related cousin of the efficiency score. It calculates Net New ARR from a specific period divided by the prior period's S&M spend. Where the efficiency score uses total net burn in the denominator, the Magic Number isolates go-to-market spend specifically. A high Magic Number but a mediocre efficiency score often signals that S&M is lean and efficient but infrastructure, R&D, or G&A costs are elevated relative to ARR.

The Rule of 40 enters the picture as the ARR base grows. Below $25M ARR, the Rule of 40 is less meaningful because the growth rate dominates the formula and the FCF margin is typically deeply negative. Above $25M, investors begin expecting the company to demonstrate a credible path to combined 40+ performance. For more on the Rule of 40 mechanics and how investors evaluate it alongside ARR growth rates, see the guide to ARR growth rate formulas and benchmarks.

Common calculation mistakes

The efficiency score is simple to define but consistently miscalculated in practice. These are the errors that appear most frequently when founders present the metric to investors — and that create credibility problems in diligence when the investor recalculates and gets a different number.

Mistake 1: Using gross new ARR instead of net new ARR. This is the most common error. Gross new ARR counts only new customer acquisitions and ignores churn, contraction, and expansion. Using gross new ARR overstates the efficiency score by inflating the numerator. If you closed $600K in new logos but lost $200K in churn, your efficiency score should use $400K (net) in the numerator — not $600K (gross). Investors will recalculate using net figures and the difference will surface immediately.

Mistake 2: Using a single month's data in a quarter with unusual timing. A month in which three large annual contracts renew in advance and only one payroll cycle runs will produce an artificially high efficiency score. A month in which annual bonuses are paid and no annual renewals land will produce an artificially low one. Use quarterly figures or trailing three-month sums to normalize these timing effects.

Mistake 3: Excluding stock-based compensation from burn but including other non-cash items. The goal of net burn in this formula is to capture recurring operational cash consumption. Stock-based compensation is non-cash and should be excluded. However, some founders selectively exclude SBC while including other non-cash items inconsistently. Pick a methodology and apply it consistently across all periods. Investors will notice if the burn figure fluctuates in ways that do not track actual headcount or operational changes.

Mistake 4: Applying the metric above $30M ARR as if the benchmarks still apply. Bessemer designed the efficiency score specifically for early-stage companies. Above $30M ARR, the denominator (net burn) typically has a different character — the company is often closer to breakeven, the burn is smaller relative to revenue, and the metric loses resolution. At that stage, investors shift attention to the Rule of 40, free cash flow margin, and net revenue retention. Presenting an efficiency score of 4.0 to a Series C investor when your company is at $45M ARR is technically accurate but contextually misleading — use the metrics that apply to your stage.

Mistake 5: Treating a single strong quarter as a trend. A company that pulls forward several large enterprise deals into Q4 for quota credit will show an excellent efficiency score in Q4 and a poor one in Q1. Investors see this pattern frequently. Present at least six quarters of data and be prepared to explain any quarter-over-quarter anomalies. A score that has been consistently above 1.0 for six quarters is a fundamentally different signal than a score of 1.2 in one quarter surrounded by scores of 0.4.

How to improve your Bessemer Efficiency Score

The efficiency score is a ratio. It improves when the numerator (Net New ARR) grows faster than the denominator (Net Burn), when the denominator shrinks without proportionally reducing the numerator, or — ideally — when both move in the right direction simultaneously. The levers to achieve this are specific and not interchangeable.

Reduce gross churn. Churned ARR directly reduces the numerator of Net New ARR without reducing burn at all. A company with $600K in new logo ARR but $250K in churn has a Net New ARR of $350K. The same company with $150K in churn has a Net New ARR of $450K — a 29% improvement in the numerator at zero incremental cost. Churn reduction through better onboarding, customer health scoring, and proactive expansion conversations is the highest-leverage efficiency improvement most early-stage SaaS companies can make. For a detailed breakdown of the tactics, see the guide to improving SaaS unit economics.

Build expansion revenue into the product. Expansion ARR has no acquisition cost by definition. A $400K annual contract that expands to $520K at renewal adds $120K to the Net New ARR numerator with no corresponding increase in S&M spend. Companies that design usage-based pricing, modular add-ons, or seat-based expansion into the product architecture build structural efficiency into the ratio. The best SaaS businesses at Series B and beyond generate 30–50% of their Net New ARR from expansion within the existing customer base.

Improve sales efficiency before adding headcount. A company that doubles its sales team without improving win rates, average deal sizes, or sales cycle length is doubling the burn denominator without proportionally growing the numerator. Before every significant S&M hire, the question is: what does the data say about current rep productivity? If existing AEs are running at 80% of quota with two-month sales cycles, adding more AEs is a reasonable investment. If existing AEs are at 50% of quota with six-month cycles, the problem is in the sales motion, not the headcount — and adding more of the same does not solve it.

Raise prices on new business. Price increases on renewals take time to work through the ARR base. Price increases on new business take effect immediately. A 20% ACV increase that does not materially affect win rates adds 20% to the new ARR contribution of every deal closed, improving the efficiency score without increasing burn at all. Most early-stage SaaS companies are significantly underpriced relative to the value they deliver. The founders who test pricing aggressively at Series A are typically the ones showing strong efficiency scores at Series B.

Reduce COGS through infrastructure optimization. For companies with meaningful cloud infrastructure costs, a 20–30% reduction in COGS (through reserved instance purchasing, architecture optimization, or renegotiated vendor contracts) reduces net burn directly. A company burning $600K per month with $120K in cloud infrastructure costs that reduces infrastructure to $80K has reduced net burn by $40K without any impact on ARR growth. Over a full year, that is $480K of additional capital efficiency.

Use G&A leverage as the company scales. G&A costs — finance, legal, HR, office — should not scale linearly with headcount. A company with 30 employees and 3 G&A staff that grows to 60 employees and 4 G&A staff has found leverage. A company that scales from 30 to 60 employees while growing G&A from 3 to 8 staff has not. G&A as a percentage of total operating expenses should decline as ARR grows. Companies at $5M ARR typically run G&A at 15–20% of expenses; companies at $20M ARR should be at 10–12%.

Limitations and when to use other metrics

The Bessemer Efficiency Score is not the only metric that matters and is not the right primary metric at every stage. Understanding its limitations prevents over-reliance on a single ratio at the expense of the complete operating picture.

The score does not distinguish between the quality of new ARR. A company that adds $500K in Net New ARR from five $100K enterprise contracts is fundamentally different from one that adds the same amount from 500 $1K SMB contracts — the enterprise business has longer payback but much stronger retention dynamics, while the SMB business faces higher churn risk and higher support cost per dollar of ARR. The efficiency score shows the same number for both.

It also does not reflect gross margin. Two companies with identical efficiency scores but 80% and 50% gross margins respectively have very different unit economics and very different paths to profitability. The company with 80% gross margins will convert much more of its ARR growth into free cash flow as it scales. The 50% gross margin company will require significantly more capital to reach the same FCF profile.

At ARR above $30M, investors shift to metrics that better capture the maturity of the business. The Rule of 40 becomes the dominant efficiency signal because it incorporates profitability alongside growth — not just the ratio of ARR creation to burn. The Cash Conversion Score (ARR divided by total capital invested minus remaining cash) provides a lifetime capital efficiency view that is particularly relevant for companies approaching IPO readiness.

How Fairview tracks capital efficiency for SaaS operators

The Bessemer Efficiency Score is a quarterly metric, but the inputs that drive it — ARR movements, burn by category, expansion revenue, churn — are operational data that accumulates in real time across your CRM, billing system, financial data, and customer success platform. By the time most SaaS operators assemble the quarterly efficiency score, the data is already weeks old and the ability to act on it has narrowed.

Fairview connects your operating data — Stripe, HubSpot, Salesforce, QuickBooks, and your infrastructure cost feeds — into a single operating layer that surfaces Net New ARR, net burn, and the resulting efficiency score on a rolling basis. Instead of assembling the calculation manually in a spreadsheet at the end of each quarter, you see the trend updating in real time as new deals close, contracts churn, and expenses post.

For founders preparing for a Series B or Series C, Fairview's operating dashboard gives you the six to eight quarters of clean, reconciled efficiency data that investors request — alongside the supporting metrics (CAC Payback, NDR, gross margin by cohort) that contextualize the efficiency score. The data exists in your systems. Fairview makes it accessible without a finance team and an analyst and a two-week data preparation project.

If you are within 12 months of a Series B or C and the efficiency story is not yet clean, the right time to get the data in order is now — not the week an investor asks for it.

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Frequently asked questions

What is the Bessemer Efficiency Score formula?

The Bessemer Efficiency Score equals Net New ARR divided by Net Burn for the same period. Net New ARR is new ARR plus expansion ARR minus churned ARR and contraction ARR. Net Burn is total operating expenses minus revenue collected — the actual cash loss during the period. A score of 1.0 means the company generated one dollar of new ARR for every dollar it burned. The metric applies to companies with less than $30M ARR; above that threshold, investors typically shift to the Rule of 40 and the Cash Conversion Score.

What is a good Bessemer Efficiency Score in 2026?

Bessemer Venture Partners uses three tiers: below 0.5 is concerning, 0.5 to 1.5 is solid, and above 1.5 is excellent. In practice, the fundraising bar has tightened since 2022. Series B investors in 2026 typically expect scores of at least 0.8 to 1.0 before committing to term sheets. Series C investors look for 1.0 or higher with a trend of improvement over the prior three to four quarters. Companies below 0.5 are seen as capital-inefficient and must compensate with exceptional growth rates and a credible path to efficiency improvement.

What counts as net burn in the Bessemer Efficiency Score?

Net burn is total operating expenses (COGS, S&M, R&D, G&A) minus all revenue collected during the period. It represents actual cash loss, not GAAP loss. One-time charges such as severance and non-cash items such as stock-based compensation and depreciation should be excluded. Use a trailing three-month average or quarterly figure to smooth the timing lumpiness of collections and payroll cycles. If the company is cash-flow positive, net burn is negative and the efficiency score does not apply in the conventional benchmark framework.

How does the Bessemer Efficiency Score relate to the Rule of 40?

The Rule of 40 sums ARR growth rate and free cash flow margin and targets a combined score of 40 or above. It applies primarily to companies above $25M ARR where profitability begins to matter alongside growth. The Bessemer Efficiency Score is more granular and forward-looking — it measures how efficiently new ARR is being created from current burn, making it more relevant for pre-$30M companies still in growth investment mode. Use the efficiency score to communicate capital discipline in the growth phase, and the Rule of 40 to show investor-grade profitability as the business scales past $25M ARR.

Can the Bessemer Efficiency Score be gamed or manipulated?

Yes, and investors know how to identify it. Common manipulation patterns include pulling forward multi-year contract signings into a single quarter to inflate Net New ARR, temporarily cutting headcount or deferring payroll to reduce Net Burn, and stripping legitimate operating costs from the burn figure. Bessemer diligence teams request quarterly data for at least six to eight quarters specifically to identify period-specific anomalies. A single outlier quarter is a flag, not a signal. Sustained scores above 1.0 across multiple quarters, combined with consistent growth rate and gross margin, are what create investor conviction.

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