Startup Financial Metrics: The 12 Numbers to Track

Startup financial metrics are the small set of numbers that tell you whether your company can survive and whether its growth is healthy. The essentials are cash, burn rate and runway (survival), revenue and growth rate (momentum), gross margin (quality of revenue) and unit economics such as CAC, LTV and payback period (efficiency). Track them monthly from one clean source, and you will spot problems while you still have time to fix them.

This guide explains each metric, how to calculate it, what it tells you and where founders typically go wrong. It is the hub for the more detailed articles on calculating burn rate, extending runway and the LTV to CAC ratio.

Why a short list beats a big dashboard

Early-stage companies rarely fail because they tracked too few numbers. They struggle because nobody looked closely at the few numbers that mattered, or because the numbers came from three different spreadsheets that disagreed. A useful metrics set has three properties:

• It is small. A dozen numbers you understand beat fifty you skim.
• It is defined. Everyone on the team uses the same formula for "churn" or "MRR".
• It is reviewed on a rhythm. The same day each month, the same format, compared against the plan.

The 12 metrics below fall into four groups. Pre-revenue companies can start with the first group and add the others as revenue appears.

Group 1: Survival metrics

1. Cash in the bank

The simplest and most important number: how much cash the company can actually spend today. Count only accessible cash. Money committed by an investor but not yet wired, or a customer invoice that has not been paid, does not count yet.

2. Gross burn

Gross burn is your total monthly cash spending: salaries, contractors, rent, software, marketing, taxes and anything else that leaves the account. It answers the question "what does it cost to run this company for a month?"

3. Net burn

Net burn is gross burn minus cash received from revenue in the same month.

Net burn = cash out − cash in from operations

If you spend €60,000 and collect €18,000 from customers, your net burn is €42,000. This is the number that drains your bank balance. The detailed walkthrough, including how to handle one-off payments and annual contracts, is in our guide on how to calculate burn rate.

4. Runway

Runway is how many months you can operate before cash hits zero.

Runway (months) = cash in the bank ÷ net burn

With €500,000 in the bank and €42,000 net burn, runway is roughly 11.9 months. That simple formula assumes burn stays flat. In reality, hiring plans push expenses up and revenue growth pulls net burn down, so it is worth projecting month by month. The free startup runway calculator does this for you: enter cash, revenue, expenses and monthly growth rates, and it shows months of runway, the zero-cash date and whether you break even first.

Group 2: Revenue and momentum

5. Revenue (and MRR or ARR for subscriptions)

For subscription businesses, monthly recurring revenue (MRR) is the normalised monthly value of all active subscriptions. Annual recurring revenue (ARR) is MRR × 12. Exclude one-off setup fees, consulting work and usage spikes you do not expect to repeat, or report them separately.

A useful MRR breakdown:

Component	Meaning
New MRR	Revenue from customers who started this month
Expansion MRR	Upgrades and add-ons from existing customers
Contraction MRR	Downgrades from existing customers
Churned MRR	Revenue lost from customers who cancelled
Net new MRR	New + expansion − contraction − churned

The breakdown matters more than the total. Two companies can each add €10,000 of net new MRR, one through strong expansion and low churn, the other by replacing a leaky customer base with expensive new sales.

6. Growth rate

Month-over-month growth is (this month's revenue − last month's revenue) ÷ last month's revenue. Small numbers swing wildly, so many founders also look at a three-month rolling average. At very early stages, a single large customer can distort the picture; note such events alongside the number.

7. Customer count and revenue per account

Track active paying customers and average revenue per account (ARPA = MRR ÷ active customers). ARPA tells you whether you are moving upmarket, discounting heavily, or attracting smaller customers than planned.

Group 3: Quality of revenue

8. Gross margin

Gross margin = (revenue − cost of goods sold) ÷ revenue

For software, cost of goods sold usually includes hosting, third-party services needed to deliver the product, payment processing and the part of customer support needed to keep customers running. For physical products it includes materials, manufacturing, packaging and shipping. Gross margin determines how much of each euro of revenue is available to pay for growth and overhead. A business with thin margins needs far more revenue to cover the same costs.

9. Churn and retention

Customer churn is the share of customers who cancel in a period. Revenue churn measures lost revenue instead, and net revenue retention includes expansion from the customers who stay.

Monthly customer churn = customers lost this month ÷ customers at the start of the month

Churn compounds. A monthly churn rate that sounds small can mean you replace a large part of your customer base every year. Watch cohorts (customers grouped by start month) to see whether newer customers retain better than older ones.

Group 4: Unit economics

10. Customer acquisition cost (CAC)

CAC = total sales and marketing spend ÷ new customers acquired

Include salaries of people who sell and market, not just ad spend. A "blended" CAC that includes free organic signups looks better than the paid CAC of any channel, so calculate both.

11. Customer lifetime value (LTV)

A common simple version for subscriptions:

LTV = ARPA × gross margin ÷ monthly churn

Using gross margin rather than revenue matters: a customer paying €100 a month at a 75% margin contributes €75 per month, not €100.

12. LTV:CAC and CAC payback

LTV:CAC compares the value of a customer to the cost of acquiring them. CAC payback is the number of months of gross profit needed to earn back the acquisition cost:

CAC payback (months) = CAC ÷ (ARPA × gross margin)

Payback is often more useful than LTV for early startups, because it depends on fewer assumptions and maps directly onto cash. We cover both in depth, including rules of thumb and how to improve them, in the LTV to CAC ratio guide. To run the numbers quickly, use the SaaS unit economics calculator.

A worked example: one month, all twelve metrics

Here is a hypothetical B2B software company at the end of March.

Metric	Value	How it was calculated
Cash in the bank	€620,000	Bank statement
Gross burn	€71,000	All cash out in March
Revenue collected	€26,000	Cash received from customers
Net burn	€45,000	€71,000 − €26,000
Runway	~13.8 months	€620,000 ÷ €45,000
MRR	€25,500	170 customers × €150 ARPA
MoM growth	6.3%	From €24,000 in February
Gross margin	78%	(Revenue − hosting, support, payments) ÷ revenue
Monthly churn	2.5%	4 of 160 starting customers cancelled
CAC	€1,400	€19,600 sales & marketing ÷ 14 new customers
LTV	€4,680	€150 × 0.78 ÷ 0.025
LTV:CAC / payback	3.3 / ~12 months	€4,680 ÷ €1,400; €1,400 ÷ (€150 × 0.78)

Reading this table as a whole tells a story. Runway is a little over a year, which is a common point at which founders start preparing a fundraise. Growth is positive, margins are healthy, and payback of about a year means each new customer ties up cash for twelve months before contributing. If the team plans to double marketing spend, net burn will rise before the extra revenue arrives, so the runway projection needs to be rerun with the new plan.

How to set up your monthly metrics review

A metrics routine only works if it happens reliably. A simple version:

1. Close the books. Reconcile bank accounts and categorise every transaction within the first week of the month. Use the same categories each month.
2. Update the core sheet. One tab, one row per month, the twelve metrics above. Formulas, not hand-typed numbers.
3. Compare to plan. Next to each actual, show the planned value and the difference. Explain any large gap in one sentence.
4. Rerun the runway projection. Use the latest burn and growth assumptions. Note the new zero-cash date.
5. Pick one or two actions. For example, "Pause the paid channel with the worst payback" or "Start fundraising conversations in eight weeks".
6. Share it. Send the same one-page summary to co-founders, and later to investors in a monthly update.

Checklist: is your metrics setup trustworthy?

• Every metric has a written formula that the whole team uses
• Cash figures come from the bank, not from an accounting estimate
• Recurring and one-off revenue are separated
• CAC includes people costs, not only ad spend
• Churn is measured against customers at the start of the period
• Runway is projected with expected hiring, not just today's burn
• The review happens on a fixed date each month

Common mistakes with startup metrics

Counting bookings as cash. A signed annual contract is good news, but if it is paid quarterly, only the first instalment affects this month's cash. Runway is a cash concept.

Ignoring upcoming cost jumps. Planned hires, a new office or an annual software renewal can change burn significantly. Projected runway should include them.

Using revenue instead of gross profit in LTV. It inflates customer value and can make an unprofitable acquisition channel look attractive.

Blending all channels together. A blended CAC can hide one channel that loses money on every customer. Break it down by channel once you have enough volume.

Changing definitions quietly. If you change how you count active customers or MRR, note it and restate earlier months. Otherwise growth trends become meaningless.

Tracking without acting. If no decision ever comes out of the monthly review, the metrics are either the wrong ones or nobody owns them.

Which metrics matter at which stage

Not every number deserves the same attention at every stage.

Stage	Focus metrics	Why
Pre-revenue	Cash, net burn, runway, cost per experiment	Survival while you search for demand
First revenue	Plus MRR, growth, early churn	Evidence that people pay and stay
Repeatable sales	Plus CAC by channel, payback, gross margin	Deciding where to invest growth spend
Scaling	Plus LTV:CAC, net revenue retention, cohort analysis	Efficiency of growth at higher volume

Before you raise money, investors will usually ask for several of these numbers, and having them ready with clear definitions makes conversations faster. The startup fundraising guide explains how metrics fit into the wider process. If runway is short, start with the practical levers in how to extend startup runway.

Summary

Start with survival: cash, net burn and runway. Add revenue, growth and gross margin once customers pay, then unit economics once you spend money to acquire them. Define every metric once, review them monthly against plan, and let each review end in a decision. The numbers themselves do not run the company, but they tell you early when the plan and reality are drifting apart.

This article is general information, not financial or accounting advice. For accounting treatment specific to your country, talk to an accountant or tax adviser.