CAC payback period: formula, calculator and 2026 benchmarks
What is the CAC payback period?
The CAC payback period is how many months a new customer takes to repay what it cost to acquire: CAC ÷ (new monthly recurring revenue per customer × gross margin). Spend $12,000 to win a customer paying $1,000 a month at an 80% margin, and payback is 15 months. Under 12 months is strong.
Key facts
- David Skok set the rule of thumb in 2010: "startups need to recover their cost of customer acquisition in less than 12 months." (Skok, 2010)
- Bessemer's targets depend on the customer segment, at under 12 months for SMB, under 18 for mid-market and under 24 for enterprise. (Bessemer, 2021)
- The median private B2B SaaS company paid back CAC in 16 months in 2025, down from 18 in 2024, in Benchmarkit's data on 198 companies. (Benchmarkit, 2026)
- Public software takes far longer, with Meritech's median at 30.5 months in Q2 2026, up from 17.2 in Q3 2021. (Meritech, 2026)
- Investors measure payback on gross profit, not revenue. a16z Growth "gross margin-adjusted all our CAC paybacks" to compare companies consistently. (a16z, 2022)
CAC payback period calculator
Enter the fully loaded cost of winning one new customer, the monthly recurring revenue that customer brings, and your gross margin. For a company-wide figure, use last quarter's sales and marketing spend divided by the customers won.
Want a CAC you can defend? CX Cash is being built to calculate fully loaded CAC by channel, from your accounting and ad spend data.
How to calculate CAC payback
CAC payback (months) = CAC ÷ (New MRR per customer × Gross margin)
In words: divide what it cost to win a customer by the gross profit that customer brings in each month.
- CAC: Fully loaded customer acquisition cost per new customer, meaning sales and marketing salaries, commissions, programmes and tools, divided by customers won.
- New MRR per customer: The monthly recurring revenue a new customer brings at the start. Company-wide versions use new ARR divided by 12.
- Gross margin: The share of revenue left after the cost of delivering the service, such as hosting and support. Dave Kellogg notes subscription gross margin "usually runs around 80%".
Worked example
An illustrative company that spends $12,000 in sales and marketing for each new customer, who pays $1,000 a month, at an 80% gross margin. The results below are computed by the calculator's tested code.
| Input | Value |
|---|---|
| Fully loaded CAC per new customer | $12,000 |
| New MRR per customer | $1,000 |
| Gross margin (%) | 80% |
CAC payback: 15.0 months Payback before gross margin: 12.0 months
Payback = 12,000 ÷ (1,000 × 80%) = 15.0 months
A 15-month payback. On revenue alone it would be 12 months, but only 80 cents of each revenue dollar is gross profit, so it takes three months longer. That's "good" on Ball's bands and inside Bessemer's mid-market target, but over its 12-month line for small-business customers. Raising gross margin to 85% would cut payback to about 14.1 months (our arithmetic).
In a spreadsheet
- CAC payback in months, with CAC per customer in B2, new MRR per customer in C2 and gross margin in D2: =B2/(C2*D2)
- Payback before gross margin: =B2/C2
- Public-company version, with last quarter's sales and marketing in B2, this quarter's net new ARR in C2 and gross margin in D2: =B2/(C2*D2)*12
- From the SaaS magic number in B2, at an 80% gross margin: =15/B2
How founders and investors read CAC payback
If you're the founder
- It tells you how long each new customer ties up your cash. Until payback you're funding the customer; after it, the customer funds you. Bessemer: "it's only after the CAC payback period expires that customers become profitable to your cloud business."
- Your segment sets the target. Larger customers cost more to win but stay longer. Skok: "In many enterprise businesses, where there is a Land and Expand model, Months to recover CAC can be around 20 months, and the model works fine." (Skok, 2020)
- Billing terms change the cash picture. Collect a year up front and the cash comes back in the first invoice. Kellogg: "In enterprise SaaS, you typically get paid once/year so an 8-month CPP is actually a 30-60 day CPP".
Questions you'll be asked
- Is that on revenue or on gross margin?
- What's in CAC? Salaries, tools, founders' selling time?
- How does payback differ by channel and customer segment?
- How many of each cohort are still customers at the payback month?
If you're the investor or LP
- Ask for the definition first. Payback on revenue is shorter than on gross profit by the gross margin, so at 80% a 12-month figure on revenue is 15 months on gross profit (our arithmetic).
- It's a measure of risk, not return. Kellogg: payback periods "are risk metrics, not return metrics." Read it with LTV:CAC and net revenue retention to see what happens after payback.
- Public comparables aren't a fair yardstick. Their medians of about 30 months use revenue × 4 as ARR and all sales and marketing spend.
Questions to ask the company
- How is CAC allocated between new customers and expansion?
- What is payback by segment and by channel?
- How has payback moved over the last four quarters?
- What are gross and net revenue retention for recent cohorts?
What is a good CAC payback period?
Under 12 months is strong for companies selling to small businesses, and up to 18 or 24 months is acceptable for mid-market and enterprise customers who stay longer. The median private SaaS company took 16 months in 2025. Public-company figures, measured differently, run near 30.
Show the numbers
| Average contract value | Median | 25th percentile (best quarter) |
|---|---|---|
| Under $5K | 11 months | 10 months |
| $5K–10K | 12 months | 8 months |
| $10K–25K | 18 months | 10 months |
| $25K–50K | 17 months | 13 months |
| $50K–100K | 22 months | 15 months |
Benchmarks
| Segment | Measure | Typical | Top quartile | As of | Sample | Source |
|---|---|---|---|---|---|---|
| Private SaaS companies · For this metric shorter is better, so the "top quartile" column shows the 25th percentile. | ||||||
| B2B SaaS and AI-native | CAC payback | 16 months (75th percentile 24) | 10 months | CY 2025 | 198 companies (Benchmarkit) | Benchmarkit, 2026 |
| Horizontal vs vertical SaaS | Median CAC payback | 14 months horizontal; 18 vertical | — | CY 2025 | 198 companies (Benchmarkit) | Benchmarkit, 2026 |
| Private SaaS, every ARR band | Payback of the most efficient teams | 13 months or less | — | Q2 2025 | 800+ companies (High Alpha) | High Alpha, 2025 |
| Growth-stage software | Top-quartile CAC payback | About 16 months | — | 2025 | ICONIQ portfolio and public companies | ICONIQ, 2025 |
| Public software companies · These use quarterly revenue × 4 as ARR and all sales and marketing spend, adjusted for gross margin, so they run far longer than private-company figures. | ||||||
| Public SaaS comparables | Gross-margin-adjusted payback | 31 months (75th percentile 50) | 23 months | 25 Sep 2026 | About 70 companies tracked (Clouded Judgement) | Clouded Judgement, Sep 2026 |
| Public software | Median payback | 30.5 months (28.4 the quarter before) | — | Q2 2026 | Over 100 companies in Meritech's history | Meritech, 2026 |
| Rules of thumb | ||||||
| Startups (Skok) | Target | Under 12 months | — | Feb 2010 | VC rule of thumb | Skok, 2010 |
| By customer segment (Bessemer) | Targets | SMB under 12 months; mid-market under 18; enterprise under 24 | — | Sep 2021 | VC rule of thumb | Bessemer, 2021 |
| Private cloud companies (Bessemer) | Bands | 0–6 months best; 6–12 better; 12–18 good | — | Apr 2023 | VC rule of thumb | Bessemer, 2023 |
| Earlier-stage companies (Ball) | Bands | Under 12 months fantastic; 12–24 good; 24–36 OK; over 36 dicey | — | Mar 2026 | VC rule of thumb | Clouded Judgement, Mar 2026 |
Fast growth and fast payback go together. Benchmarkit: "The fastest growing companies have a median CAC Payback of 10 months, compared to 18 months for companies growing 11-20%".
Small companies may look better than they are. High Alpha warns that "early-stage companies are not always fully accounting for all expenses to acquire customers, which may artificially lower their CAC payback period", naming founder salaries, support costs and onboarding.
Compiled Oct 2, 2026. Next review: June 2027, after Benchmarkit's 2027 report. Left out: KeyBanc and Sapphire 2024 and 2025 surveys (The full surveys are gated; the only copies we found were third-party reposts); High Alpha's payback table by ARR band (The report is marked proprietary, so we quote its sentences rather than reproduce its tables); ICONIQ 2026 State of Scaling (The report prohibits reproduction of its figures). Download these benchmarks as CSV.
CAC payback vs magic number, LTV:CAC, burn multiple and CAC ratio
| Metric | Answers | Ignores | Use it when | It misleads when |
|---|---|---|---|---|
| CAC payback period | Months of gross profit to recover the cost of winning a customer | What happens after payback, such as churn and expansion | Judging how long acquisition spend ties up cash | It's on revenue, or churn is high |
| SaaS magic number | New annual revenue per $1 of sales and marketing | Gross margin | Setting the sales and marketing budget | One quarter is unusual |
| LTV:CAC ratio | Lifetime gross profit per $1 of acquisition cost | How long the cash is tied up | Judging the return on acquisition | Customer lifetime is guessed from a short history |
| Burn multiple | Cash burned per $1 of net new ARR | Which spending drove the burn | Judging the whole company's efficiency | The company is profitable |
| CAC ratio | Sales and marketing spend per $1 of new ARR | Gross margin and time | Comparing sales efficiency directly | Compared across companies with different margins |
CAC payback in months = 12 × CAC ratio ÷ gross margin. At an 80% gross margin that becomes 15 ÷ magic number, as Dave Kellogg points out, so a magic number of 1 means a 15-month payback.
Common mistakes: how CAC payback gets flattered
- Measuring on revenue, not gross profit. Revenue-based payback looks shorter by the gross margin. Kellogg found one benchmark's numbers ran low for this reason and reckoned they needed scaling up by 1.25 to 1.5 to compare with others.
- Leaving costs out of CAC. Founders' selling time, sales tools, onboarding and support for new customers are all acquisition costs. Leaving them out flatters payback, most often at early-stage companies.
- Blending channels and segments. A cheap channel can hide an expensive one in the average. Calculate payback by channel and by customer segment as well as overall.
- Ignoring churn. Payback assumes the customer stays. Kellogg's extreme case: "CPP of 12 months and 100% churn rate means you get your money back in a year but never get anything else."
- Mismatching the timing. Spend comes before the customers it wins. Public-company versions divide the previous quarter's sales and marketing by this quarter's new ARR.
- Comparing private and public figures. Public medians near 30 months use revenue × 4 as ARR and net new ARR after churn. They aren't a benchmark for a private company's per-customer payback.
Where CAC payback came from and how it's regarded today
| When | What happened | Source |
|---|---|---|
| Sep 2026 | Meritech reports public software's median payback at 30.5 months for Q2 2026: "payback has ticked back up in the first half of 2026." | Meritech, 2026 |
| Jun 2026 | Benchmarkit finds the private-company median improved from 18 months in 2024 to 16 in 2025. | Benchmarkit, 2026 |
| Mar 2026 | Jamin Ball publishes his bands and notes: "Companies with <24 months of CAC payback have shown the ability to be wildly FCF profitable." | Clouded Judgement, Mar 2026 |
| Nov 2025 | High Alpha finds that companies with 106%+ net revenue retention and payback under 10 months "Achieve Materially Stronger Growth and Rule of 40 Scores". | High Alpha, 2025 |
| Sep 2025 | ICONIQ: "CAC payback remains extended at ~16 months for top quartile". | ICONIQ, 2025 |
| Dec 2023 | KeyBanc and Sapphire report a median payback of about 23 months for 2022 in their private SaaS survey. | KeyBanc & Sapphire, 2023 |
| Jun 2023 | Dave Kellogg argues payback is a risk metric, not a measure of sales efficiency. | Kellogg, 2023 |
| Jun 2023 | SEC staff ask Klaviyo to disclose its CAC payback for each period presented, not as an average over eight quarters. Klaviyo's July reply adds a quarterly series to its draft prospectus. | Klaviyo response letter, 2023 |
| Dec 2022 | a16z Growth "gross margin-adjusted all our CAC paybacks" in its guide to growth metrics. | a16z, 2022 |
| Sep 2021 | Bessemer sets segment targets of under 12, 18 and 24 months for SMB, mid-market and enterprise. | Bessemer, 2021 |
| Jan 2013 | Skok: "many of the best SaaS businesses are able to recover their CAC in 5-7 months." | Skok, 2013 |
| Oct 2012 | Bessemer lists the "CAC payback period" among its five accounting metrics for cloud companies. | Bessemer, 2012 |
| Feb 2010 | Skok names the metric: "Hence my preference for the term Months to Recover CAC." | Skok, 2010 |
| Dec 2009 | Skok's "Startup Killer" post: "Aim to recover your CAC in < 12 months, otherwise your business will require too much capital to grow." | Skok, 2009 |
How it's regarded today
- Longer in public markets. Meritech: "Payback periods declined for most of 2025, but payback has ticked back up in the first half of 2026" (Meritech, 2026).
- Improving in private companies. Benchmarkit's median fell from 18 to 16 months in 2025, which it calls "tied for the most significant single-year improvement in the four-year trend".
- Read with retention. Kyle Poyar: "The two strongest predictors of long term and profitable growth are CAC payback period and net revenue retention (NRR)."
- 2026 SaaS and AI Metrics Benchmarks (Benchmarkit, 2026). CAC payback quartiles for 2025, the trend since 2022, and medians by contract value, growth rate and solution type.
- Meritech Software Pulse | 25-September-2026 (Meritech, 2026). Median payback of public software companies each quarter since 2021.
- Scaling to $100 Million (Bessemer, 2021). Segment targets, and why Bessemer measures payback on gross-margin-adjusted ARR.
What experts say about CAC payback
“Anything less than 12 months is fantastic, 12-24 months is good, 24-36 months is ok, and >36 months gets dicey”
“The two strongest predictors of long term and profitable growth are CAC payback period and net revenue retention (NRR).”
“My own rule says that startups need to recover their cost of customer acquisition in less than 12 months.”
CAC payback FAQ
What is the CAC payback period?
The number of months a new customer takes to repay what it cost to acquire, counting only the gross profit the customer generates. David Skok called it "Months to Recover CAC".
How do you calculate CAC payback?
Divide customer acquisition cost by the monthly recurring revenue a new customer brings, times gross margin. $12,000 ÷ ($1,000 × 80%) is a 15-month payback.
What is a good CAC payback period?
Under 12 months is strong, especially when selling to small businesses. Bessemer accepts up to 18 months for mid-market and 24 for enterprise. The median private SaaS company took 16 months in 2025 in Benchmarkit's data.
Should CAC payback use revenue or gross margin?
Gross margin. Revenue includes the cost of serving the customer, so it overstates what comes back. Bessemer, a16z and most benchmarks adjust for gross margin.
Why are public-company payback periods so long?
Public figures divide all sales and marketing spend by net new ARR after churn, with ARR implied from revenue. Mature companies also spend more to find each new dollar. Medians run near 30 months.
Does CAC payback include expansion revenue?
Per customer, use the new customer's starting revenue. Company-wide versions vary: Clouded Judgement and Meritech divide by net new ARR after churn, which lengthens payback, while others count new and expansion ARR. Say which you use.
How does CAC payback relate to the magic number?
They're two views of the same efficiency. At an 80% gross margin, CAC payback in months is roughly 15 divided by the magic number.
Related metrics and guides
Sources
Every link was opened and checked. Archived copies guard against links that move or disappear.
Primary data
- 2026 SaaS and AI Metrics Benchmarks. Benchmarkit, 1 Jun 2026. Sponsored report; figures read from its charts; formula not published. Archived copy
- 2025 SaaS Benchmarks Report. High Alpha, Nov 2025. Marked proprietary; quoted, not reproduced. Archived copy
- State of Software 2025: Rethinking the Playbook. ICONIQ Analytics, Sep 2025. Investor's portfolio and public-company data; quoted, not reproduced. Archived copy
- KeyBanc Capital Markets and Sapphire Ventures Private SaaS Company Survey Reveals Pivot to Efficient Growth and Profitability. Sapphire Ventures (press release), 20 Dec 2023. Press release; the full survey is gated. Archived copy
- Registration statement (Form S-1). Klaviyo (SEC filing), 25 Aug 2023. Read from the archived copy. Archived copy
- Response to SEC staff comments on the draft registration statement, quoting the staff letter of 9 June 2023. Goodwin Procter for Klaviyo (SEC correspondence), 7 Jul 2023. Read from the archived copy; the staff letter itself has no archived copy and is known through this reply. Archived copy
- Similarweb announces fourth quarter and fiscal year 2023 results (Form 6-K, Exhibit 99.1). Similarweb (SEC filing), 13 Feb 2024. Read from the archived copy; cited for the definition only. Archived copy
Practitioner
- Meritech Software Pulse | 25-September-2026. Meritech, 29 Sep 2026. Newsletter compiling public filings; Meritech has invested in some companies it covers; figures read from its chart; no archived copy found.
- Clouded Judgement 9.25.26 - Own the Interaction Layer. Jamin Ball (Altimeter), 25 Sep 2026. Newsletter; Altimeter trades in public securities; quartiles read from its table.
- Clouded Judgement 3.13.26 - In Defense of Model Lab Profitability. Jamin Ball (Altimeter), 13 Mar 2026. Newsletter; Ball calls the bands "very general rules of thumb". Archived copy
- What's going on in SaaS: The 2025 SaaS Benchmarks Report. Kyle Poyar (Growth Unhinged), 12 Nov 2025. Newsletter summarising the High Alpha report. Archived copy
- Scaling to $100 Million. Mary D'Onofrio, Ethan Ding and Atlas Editors (Bessemer Venture Partners), 21 Sep 2021. Portfolio data. Archived copy
- State of the Cloud 2023. Bessemer Venture Partners, 11 Apr 2023. Archived copy
- The five accounting metrics for cloud companies. Byron Deeter (Bessemer Venture Partners), 2 Oct 2012. Archived copy
- Introducing a16z Growth's Guide to Growth Metrics. David George, Sarah Wang and Alex Immerman (Andreessen Horowitz), 14 Dec 2022. Archived copy
- Interpreting the Insight 2023 Sales KPI Report. Dave Kellogg (Kellblog), 18 Jun 2023. Archived copy
- SaaS Metrics 2.0 – Detailed Definitions. David Skok (For Entrepreneurs), 4 Jul 2014 (updated 21 Dec 2020). The land-and-expand passage was added in the December 2020 update. Archived copy
- SaaS Metrics 2.0 - A Guide to Measuring and Improving what Matters. David Skok (For Entrepreneurs), 16 Jan 2013. Archived copy
- SaaS Metrics - A Guide to Measuring and Improving What Matters. David Skok (For Entrepreneurs), 17 Feb 2010. Archived copy
- Startup Killer: the Cost of Customer Acquisition. David Skok (For Entrepreneurs), 22 Dec 2009. Archived copy
Changes to this page
- · Major · Rewritten and moved here from our earlier article on CAC payback. Benchmarks compiled 2 October 2026.
- · Major · First published as "How to Calculate CAC Payback Period and Price the Cash It Ties Up".
Cite this page
Dominique Bouillet, "CAC payback period: formula, calculator and 2026 benchmarks", CX Cash, updated Oct 6, 2026, https://cxcash.com/metrics/cac-payback-period
CX Cash builds software for founders and investors. This page is education, not investment advice. Third-party figures link to their source, and our own arithmetic and illustrative examples are labelled as such.