"What's your LTV:CAC?" "What's your burn multiple?" "How's your Net Revenue Retention?"
If these questions make you nervous, you're not alone. Many founders build amazing products but struggle to articulate their business in the language investors speak: financial metrics.
Here's the good news: you don't need an MBA to master these numbers. You need to understand 15 key metrics, know how to calculate them correctly, and—most importantly—know what "good" looks like.
This guide breaks down every metric investors will ask about, with formulas, benchmarks, and red flags to avoid.
What it is: Your normalized annual revenue from subscriptions and recurring contracts.
Formula: MRR × 12
Why investors care: ARR is the primary measure of SaaS business scale. It shows predictable, recurring revenue—the kind investors love.
Benchmarks:
Seed stage: $100K-$1M ARR
Series A: $1M-$5M ARR
Series B: $5M-$15M ARR
Gotcha: Don't include one-time revenue, implementation fees, or professional services in ARR. Investors will catch this in diligence.
What it is: Your monthly recurring revenue from all active subscriptions.
Formula: Sum of all monthly subscription revenue
Why investors care: MRR shows your baseline monthly revenue and is essential for understanding growth trajectory.
Break it down further:
New MRR: Revenue from new customers
Expansion MRR: Additional revenue from existing customers (upsells, cross-sells)
Churned MRR: Lost revenue from cancellations
Net New MRR: New + Expansion - Churned
What it is: Month-over-month percentage growth in MRR.
Formula: (Current Month MRR - Previous Month MRR) / Previous Month MRR × 100
Benchmarks:
Good: 10-15% MoM
Great: 15-20% MoM
Exceptional: 20%+ MoM
Context matters: Early-stage companies can grow faster percentage-wise. A company at $50K MRR growing 20% MoM is different from one at $500K MRR growing 20% MoM.
What it is: Revenue minus cost of goods sold (COGS), expressed as a percentage.
Formula: (Revenue - COGS) / Revenue × 100
What counts as COGS:
Hosting and infrastructure
Third-party software costs
Payment processing fees
Customer support (often debated)
Benchmarks by business type:
SaaS: 70-85%
Marketplace: 50-70%
E-commerce: 30-50%
Hardware: 20-40%
Why it matters: Higher gross margins mean more money available for R&D, sales, and marketing. Low gross margins limit growth potential.
What it is: The total cost to acquire a new customer.
Formula: (Sales + Marketing Expenses) / Number of New Customers Acquired
Important nuances:
Use fully loaded CAC: Include salaries, tools, ad spend, events—everything related to sales and marketing
Calculate separately by channel if possible (Paid CAC, Organic CAC, etc.)
Consider time lag: Marketing spend in January may generate customers in March
Benchmarks: CAC varies wildly by business model. What matters is CAC relative to LTV (see below).
What it is: The total revenue you expect from a customer over their lifetime.
Simple Formula: Average Revenue Per User (ARPU) × Customer Lifetime
More precise formula: ARPU × Gross Margin % / Monthly Churn Rate
Example:
ARPU: $500/month
Gross Margin: 80%
Monthly Churn: 2%
LTV = $500 × 0.80 / 0.02 = $20,000
Why the precise formula matters: Including gross margin ensures you're calculating the profit from a customer, not just revenue.
What it is: How much value you get from a customer versus how much you spend to acquire them.
Formula: LTV / CAC
Benchmarks:
Below 1:1: You're losing money on every customer
1:1 to 2:1: Problematic—consider it a warning sign
3:1: The benchmark for healthy unit economics
5:1+: Very efficient, but could indicate underinvestment in growth
What investors look for: A 3:1 ratio means for every $1 spent acquiring a customer, you get $3 in lifetime value. This leaves room for other expenses and profit.
What it is: How many months it takes to recover your customer acquisition cost.
Formula: CAC / (ARPU × Gross Margin %)
Example:
CAC: $6,000
ARPU: $500/month
Gross Margin: 80%
Payback = $6,000 / ($500 × 0.80) = 15 months
Benchmarks:
Excellent: Under 12 months
Good: 12-18 months
Acceptable: 18-24 months
Concerning: 24+ months
Why it matters: Shorter payback means you can reinvest in growth faster without burning through cash.
What it is: The percentage of customers who cancel in a given period.
Formula: Customers Lost During Period / Customers at Start of Period × 100
Benchmarks (monthly):
SMB-focused: 3-5% monthly (acceptable)
Mid-market: 1-2% monthly (good)
Enterprise: Under 1% monthly (expected)
Annualize for perspective: 3% monthly churn = ~31% annual churn. That means you need to grow 31% just to stay flat!
What it is: The percentage of MRR lost to cancellations and downgrades.
Formula: MRR Lost During Period / MRR at Start of Period × 100
Why it differs from logo churn: If you lose a $50/month customer but retain a $5,000/month customer, your logo churn and revenue churn will look very different.
What it is: The percentage of revenue retained from existing customers, including expansion revenue.
Formula: (Starting MRR + Expansion - Churn - Contraction) / Starting MRR × 100
Example:
Starting MRR: $100,000
Expansion: $15,000
Churned MRR: $8,000
Contraction: $2,000
NRR = ($100,000 + $15,000 - $8,000 - $2,000) / $100,000 = 105%
Benchmarks:
Below 100%: You're shrinking without new customers
100-110%: Good for SMB-focused businesses
110-130%: Excellent, typical of best SaaS companies
130%+: World-class (Slack, Twilio historically)
Why investors love high NRR: NRR above 100% means you grow even without acquiring new customers. It's compounding revenue.
What it is: How much cash you spend (net) each month.
Formula: Beginning Cash Balance - Ending Cash Balance (over a month)
Two types:
Gross Burn: Total monthly expenses (what you spend)
Net Burn: Expenses minus revenue (what you lose)
Investors typically care about Net Burn because it shows your true cash consumption.
What it is: How many months you can operate before running out of cash.
Formula: Current Cash Balance / Monthly Net Burn
Example:
Cash: $2,000,000
Monthly Net Burn: $150,000
Runway = $2,000,000 / $150,000 = 13.3 months
Best practices:
Start fundraising with 6+ months runway remaining
Target raising 18-24 months of runway
Monitor runway weekly during high-growth phases
What it is: How much you're burning relative to ARR growth. This is the efficiency metric VCs love in 2024-2025.
Formula: Net Burn / Net New ARR
Example:
Net Burn: $500,000/quarter
Net New ARR: $300,000/quarter
Burn Multiple = $500,000 / $300,000 = 1.67x
Benchmarks:
Under 1x: Highly efficient (rare)
1-1.5x: Excellent
1.5-2x: Good
2-3x: Acceptable
3x+: Concerning—may indicate inefficient growth
Why it matters: Burn multiple shows if you're efficiently converting cash into growth. In the current market, efficient growth matters more than growth at all costs.
What it is: Sales and marketing efficiency metric showing how much ARR you generate per dollar spent.
Formula: (Current Quarter ARR - Previous Quarter ARR) / Previous Quarter S&M Spend
Example:
ARR Growth: $200,000
Previous Quarter S&M: $250,000
Magic Number = $200,000 / $250,000 = 0.8
Benchmarks:
Below 0.5: Inefficient—S&M spend isn't converting
0.5-0.75: Needs improvement
0.75-1.0: Good efficiency
Above 1.0: Strong—consider increasing S&M spend
Have a single document with:
Current month actuals
Last 12 months trend
Cohort analysis (for retention metrics)
In investor meetings, you should be able to recall:
ARR and MRR (exact numbers)
Growth rate (last month, last quarter)
Churn rate and NRR
CAC and LTV:CAC
Burn rate and runway
Fumbling on basic metrics signals lack of operational rigor.
Numbers alone aren't enough. For each metric, be ready to explain:
What's driving the trend?
What are you doing to improve it?
How will it evolve over time?
Vanity metrics: Focusing on total users instead of active, paying users
Inconsistent calculations: Changing formulas between months
Missing cohort analysis: Reporting blended churn instead of cohort-specific retention
Not segmenting: Reporting one LTV when SMB and enterprise customers have vastly different profiles
Including one-time revenue in MRR: Professional services, implementation fees should be separate
At seed, investors focus on product-market fit signals: engagement metrics, early retention, and revenue growth rate matter more than perfect unit economics. By Series A, unit economics must be solid—LTV:CAC, CAC payback, and NRR become critical. Burn multiple becomes important in any environment where capital efficiency matters.
Not necessarily. Early-stage companies often have sub-optimal unit economics while finding product-market fit. What matters is the trend and your plan. If LTV:CAC was 1.5:1 six months ago and is 2.5:1 now with a clear path to 3:1, that's a compelling story. Show you understand the problem and have a plan to fix it.
Focus on leading indicators: waitlist growth, engagement metrics (DAU/MAU), user activation rates, and qualitative signals like NPS or user feedback. For financial metrics, use market benchmarks and bottoms-up estimates based on pricing tests or letters of intent.
Building an investor-ready metrics package requires both finance expertise and fundraising experience. Consider working with:
A Virtual CFO to build your financial infrastructure and metrics dashboards
Fundraise preparation advisors to translate metrics into a compelling investment narrative
Financial metrics are the language of startup investing. Mastering these 15 metrics—knowing your numbers, understanding what "good" looks like, and articulating the story behind them—separates fundable founders from everyone else.
Build your metrics dashboard. Track these numbers monthly. And most importantly, understand what each metric tells you about your business, not just what it tells investors.
Amit Patel is a startup advisor with 12 years of experience working with early-stage companies on fundraising, financial strategy, and growth. He has helped founders build metrics-driven businesses that have raised over $200M in venture capital.
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