LTV:CAC ratio: formula, calculator and 2026 benchmarks
What is the LTV:CAC ratio?
The LTV:CAC ratio divides a customer's lifetime value, the gross profit it brings over its life, by the cost of acquiring it. With $1,000 of monthly revenue, 80% gross margin and 2% monthly churn, LTV is $40,000; at a $12,000 CAC the ratio is 3.3:1. About 3:1 is the classic target.
Key facts
- David Skok, 2009: "It appears that LTV should be about 3 x CAC for a viable SaaS or other form of recurring revenue model." (Skok, 2009)
- Benchmarkit: "Median CLTV to CAC Ratio is 4.1x, exceeding the widely cited 3:1 benchmark", with the top quartile at 7.8x (2025, 146 companies). (Benchmarkit, 2026)
- Companies growing over 50% had a median LTV:CAC of 7.2x in Benchmarkit's data, against 3.2x for those growing under 10%. (Benchmarkit, 2026)
- Skok's 3x guideline assumes the simpler, revenue-based LTV and a gross margin of 80% or more. (Skok)
- Ray Rike: "less than 50% of companies calculate the CLTV:CAC Ratio." (Rike, 2025)
LTV:CAC ratio calculator
Enter average monthly recurring revenue per customer, gross margin, monthly revenue churn and fully loaded CAC. Lifetime value here is gross profit per month divided by churn, Skok's gross-margin formula.
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 LTV:CAC
LTV:CAC = (ARPA × Gross margin ÷ Monthly revenue churn) ÷ CAC
In words: work out the gross profit a customer brings each month, divide by the monthly churn rate to get lifetime value, then divide by what the customer cost to acquire.
- ARPA: Average monthly recurring revenue per account.
- Gross margin: The share of revenue left after the cost of delivering the service. Skok uses it "To truly get an accurate picture of LTV".
- Monthly revenue churn: Revenue lost to cancellations and downgrades each month. Customer lifetime is 1 ÷ churn: at 3% it is "1/0.03 which is 33 months".
- CAC: Fully loaded customer acquisition cost, all sales and marketing spend divided by new customers won.
Worked example
An illustrative customer paying $1,000 a month, at 80% gross margin and 2% monthly revenue churn, acquired for $12,000. The results below are computed by the calculator's tested code.
| Input | Value |
|---|---|
| Average MRR per customer | $1,000 |
| Gross margin (%) | 80% |
| Monthly revenue churn (%) | 2% |
| Customer acquisition cost | $12,000 |
LTV:CAC: 3.33x Customer lifetime value (gross margin): 40,000CAC payback: 15.0 months
LTV = 1,000 × 80% ÷ 2% = 40,000; LTV:CAC = 3.33x
LTV of $40,000 and a ratio of 3.33x: above Skok's 3x guide on the stricter gross-margin basis, and below Benchmarkit's 4.1x median. The customer pays back in 15 months. If churn rose from 2% to 3% a month, LTV would fall to $26,667 and the ratio to 2.22x (our arithmetic).
In a spreadsheet
- Lifetime value, with ARPA in B2, gross margin in C2 and monthly churn in D2: =B2*C2/D2
- LTV:CAC, with lifetime value in E2 and CAC in F2: =E2/F2
- Customer lifetime in months: =1/D2
- Lifetime value capped at five years (60 months): =B2*C2*MIN(1/D2,60)
How founders and investors read LTV:CAC
If you're the founder
- It measures the return on acquisition; payback measures the wait. Tunguz, on early-stage companies: "But this figure is often meaningless for early stage startups." His advice: "Use payback period instead."
- Lifetime is an estimate. At 1% monthly churn the formula assumes 100-month customers. Skok and Reiss warn that with negative churn "LTV can become infinite, which clearly doesn’t reflect reality."
- Segment it. HubSpot found its ratio was 1.5 selling direct and 5 through resellers, and moved its sales team accordingly (see the case below).
Questions you'll be asked
- Is LTV on revenue, gross margin or contribution margin?
- Do you cap the customer lifetime?
- What is the ratio by channel and segment?
- How long is CAC payback?
If you're the investor or LP
- Ask for the formula first. The same company can show 3x or 6x depending on margin, lifetime cap and discounting.
- Read it with payback. A high ratio with a long payback ties up cash for years; public SaaS companies' median gross-margin-adjusted payback was 31 months in September 2026 (Clouded Judgement).
- Gurley's caution: the formula is a tool for comparing marketing programmes, not a strategy. "You can’t win a fight with a measuring tape."
Questions to ask the company
- What churn rate drives lifetime, and over how many cohorts?
- What does the ratio look like with a five-year cap?
- How has it moved over the last four quarters?
- Is CAC fully loaded, including salaries?
What is a good LTV:CAC ratio?
About 3:1 is the classic target, and Benchmarkit's 2025 median was 4.1:1, with the top quartile above 7.8. Fast growers do better: companies growing over 50% had a median of 7.2. Below 1:1 the company loses money on every customer it wins.
Show the numbers
| 2025 growth rate | Median | 75th percentile |
|---|---|---|
| Under 10% | 3.2x | 4.1x |
| 11–20% | 4.6x | 7.7x |
| 21–30% | 3.9x | 7.0x |
| 31–50% | 4.0x | 6.8x |
| Over 50% | 7.2x | 10.8x |
Benchmarks
| Segment | Measure | Typical | Top quartile | As of | Sample | Source |
|---|---|---|---|---|---|---|
| Measured LTV:CAC | ||||||
| B2B SaaS and AI-native | LTV:CAC | 4.1x (25th percentile 2.7x) | 7.8x | CY 2025 | 146 companies (Benchmarkit) | Benchmarkit, 2026 |
| B2B SaaS and AI-native | Median LTV:CAC by year | 3.6x (2022), 3.6x (2023), 3.7x (2024), 4.1x (2025) | — | CY 2022–2025 | 146 companies in 2025 (Benchmarkit) | Benchmarkit, 2026 |
| By ARR: under $5M / over $100M | Median LTV:CAC | 4.6x / 8.0x (about 3.1x at $20M–100M) | — | CY 2025 | 146 companies (Benchmarkit) | Benchmarkit, 2026 |
| Vertical vs horizontal SaaS | Median LTV:CAC | 5.6x vs 4.1x | — | CY 2025 | 146 companies (Benchmarkit) | Benchmarkit, 2026 |
| Rules of thumb | ||||||
| SaaS companies (Skok) | Viable ratio | About 3x; public leaders "more like 5 x CAC" | — | Dec 2009 | VC rule of thumb | Skok, 2009 |
| Best SaaS companies (Skok) | Range | Higher than 3, "sometimes as high as 7 or 8" | — | Jan 2013 | VC rule of thumb | Skok, 2013 |
| B2B SaaS (Rike) | Good ratio | "closer to 4:1" than 3:1 | — | Jan 2025 | Practitioner rule of thumb | Rike, 2025 |
Benchmarkit's top performers are pulling away: "The 75th percentile jumped 30% year-over-year, from 6.0x to 7.8x."
Slow growth caps it. Benchmarkit: "Low-growth companies (<10%) are trapped at a 3.2x median, right at the traditional 3:1 threshold."
Compiled Oct 2, 2026. Next review: June 2027, after Benchmarkit's 2027 report. Left out: Benchmarkit's 2024 report (Gated; we use its 2026 report instead); Public companies (Few disclose LTV:CAC (Remitly's and Samsara's S-1s are exceptions); CAC payback is the closest public measure). Download these benchmarks as CSV.
LTV:CAC in the wild: how HubSpot rebuilt its sales team
Brad Coffey of HubSpot, quoted in David Skok's 2013 SaaS Metrics 2.0, describes calculating LTV:CAC by go-to-market channel for very small businesses. (Skok, 2013)
| Channel | Reps at the start | LTV:CAC | Reps twelve months later |
|---|---|---|---|
| Selling direct | 12 | 1.5 | 2 |
| Through value-added resellers | 4 | 5 | 25 |
In Coffey's words: "When we looked at the math we realized we had a LTV:CAC ratio of 1.5 selling direct, and a LTV:CAC ratio of 5 selling through the channel." A blended ratio would have hidden that one channel lost money while the other was highly profitable.
A 2013 example from one company, as told by an executive in a venture capitalist's post; HubSpot doesn't report LTV:CAC in its filings.
LTV:CAC vs CAC payback, magic number, burn multiple and NRR
| Metric | Answers | Ignores | Use it when | It misleads when |
|---|---|---|---|---|
| LTV:CAC ratio | Lifetime gross profit per $1 of acquisition cost | How long the cash is tied up | Judging the return on acquisition | Lifetime is guessed from a short history |
| CAC payback period | Months to recover acquisition cost | Profit after payback | Judging cash risk | Measured on revenue, not gross profit |
| SaaS magic number | New annual revenue per $1 of sales and marketing | Gross margin and churn | Setting the sales budget | One quarter is unusual |
| Burn multiple | Cash burned per $1 of net new ARR | Customer-level economics | Judging the whole company's efficiency | The company is profitable |
| Net revenue retention | What existing customers are worth a year later | Acquisition cost | Judging expansion and retention | A few big upsells hide broad churn |
With gross-margin LTV, LTV:CAC = customer lifetime in months ÷ CAC payback in months. A 15-month payback with 2% monthly churn (a 50-month lifetime) gives 50 ÷ 15 = 3.3x (our arithmetic).
Common mistakes: how LTV:CAC gets inflated
- Using revenue instead of margin. a16z: "A common mistake is to estimate the LTV as a present value of revenue or even gross margin of the customer instead of calculating it as net profit of the customer over the life of the relationship."
- Uncapped lifetimes. Low churn produces lifetimes of eight years or more that no young company has observed. Cap lifetime, often at three to five years.
- Blended CAC. One average hides channels that lose money. HubSpot's direct channel ran at 1.5x while resellers ran at 5x.
- Calculating it too early. Tunguz: a company "one or two or even three years into sales can’t yet accurately forecast" lifetime. Use payback until churn data matures.
- Ignoring time. A 5x ratio that takes four years to earn back CAC can still run a company out of cash. Pair it with payback.
- Holding low-margin products to the same bar. Skok's 3x assumes gross margin of 80% or more. At lower margins the same revenue ratio means much less profit.
Where LTV:CAC came from and how it's regarded today
| When | What happened | Source |
|---|---|---|
| Jun 2026 | Benchmarkit's median rises to 4.1x after three flat years at 3.6–3.7x. | Benchmarkit, 2026 |
| Jul 2025 | Stage 2 Capital's Jay Po calls LTV:CAC "obsolete" and proposes a cohort-based "CAC Yield" instead. | Stage 2 Capital, 2025 |
| Jan 2025 | Ray Rike: the good ratio "is now closer to 4:1". | Rike, 2025 |
| Nov 2017 | Tomasz Tunguz argues the ratio misleads early-stage startups and recommends payback instead. | Tunguz, 2017 |
| 2015 | David Skok and Stan Reiss propose a discounted-cash-flow LTV for companies with negative churn. | Skok, 2015 |
| Aug 2015 | a16z's "16 Startup Metrics" defines LTV on contribution margin rather than revenue. | a16z, 2015 |
| Jan 2013 | Skok: "The best SaaS businesses have a LTV to CAC ratio that is higher than 3, sometimes as high as 7 or 8." | Skok, 2013 |
| Sep 2012 | Bill Gurley publishes "The Dangerous Seduction of the Lifetime Value (LTV) Formula", with ten reasons not to rely on it. | Gurley, 2012 |
| Dec 2009 | Skok's "Startup Killer" sets LTV at about 3x CAC as the bar for a viable SaaS business. | Skok, 2009 |
How it's regarded today
- Still the founder's headline number. Benchmarkit's median keeps rising, and founders still lead with it, though Rike finds fewer than half of companies calculate it.
- Challenged by usage pricing and AI. Stage 2 Capital argues it "assumes CAC, churn, contract value, and gross margin are all constant" (Stage 2 Capital).
- Displaced by payback for cash planning. Investors increasingly lead with CAC payback, which needs no lifetime forecast.
- SaaS Metrics 2.0 – Detailed Definitions (Skok). The gross-margin LTV formula and why the 3x guideline assumes revenue-based LTV at 80%+ margins.
- 2026 SaaS and AI Metrics Benchmarks (Benchmarkit, 2026). LTV:CAC quartiles for 2025 and medians by year, growth rate, ARR band and solution type.
- The Dangerous Seduction of the Lifetime Value (LTV) Formula (Gurley, 2012). Ten ways the LTV formula gets misused, from a consumer-internet investor.
What experts say about LTV:CAC
“LTV:CAC has been around forever. It’s simple to calculate. It’s easy to talk about. But it’s obsolete.”
“Historically having a CLTV:CAC Ratio of 3:1 was viewed as good, but that ratio has been increasing over the last few years and is now closer to 4:1.”
“LTV > CAC. (It appears that LTV should be about 3 x CAC for a viable SaaS or other form of recurring revenue model. Most of the public companies like Salesforce.com, ConstantContact, etc., have multiples that are more like 5 x CAC.)”
“Lifetime value is the net present value of the profit stream of a customer.”
LTV:CAC FAQ
What is the LTV:CAC ratio?
Customer lifetime value divided by customer acquisition cost: how many dollars of gross profit a customer returns for each dollar spent to win it.
How do you calculate LTV:CAC?
LTV = monthly revenue per customer × gross margin ÷ monthly churn. Then divide by CAC. $1,000 × 80% ÷ 2% = $40,000; at a $12,000 CAC that's 3.3x.
What is a good LTV:CAC ratio?
About 3:1 is the classic target. Benchmarkit's 2025 median was 4.1:1 and its top quartile started at 7.8:1.
Can LTV:CAC be too high?
Possibly. A very high ratio alongside slow growth suggests room to spend more on acquisition (our reading); Benchmarkit's fastest growers combine high ratios with fast growth.
What's the difference between LTV:CAC and CAC payback?
LTV:CAC measures the total return on acquisition; payback measures how long it takes to recover the cost. Use both.
Should LTV use revenue or gross margin?
Gross margin at least. Revenue overstates what a customer is worth; a16z goes further and uses contribution margin.
Why do some investors distrust LTV:CAC?
Lifetime is a forecast. With little churn history, small changes in churn swing LTV widely, which is why Tunguz prefers payback for young companies.
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; LTV formula not published. Archived copy
Practitioner
- Clouded Judgement 9.25.26 - Own the Interaction Layer. Jamin Ball (Altimeter), 25 Sep 2026. Newsletter; payback is gross-margin-adjusted on implied ARR; no archived copy found.
- Customer Lifetime Value. Ray Rike (The SaaS Barometer), 28 Jan 2025. Newsletter by a benchmarking firm's founder; no archived copy found.
- LTV:CAC is Broken. Use CAC Yield to Measure Unit Economics in an AI-First World.. Jay Po (Stage 2 Capital), Undated (first archived 26 Jul 2025). Promotes the firm's own metric. Archived copy
- The False Confidence of the LTV/CAC Ratio for Early Stage SaaS Startups. Tomasz Tunguz, 9 Nov 2017. Archived copy
- What's your TRUE customer lifetime value (LTV)? - DCF provides the answer. David Skok and Stan Reiss (For Entrepreneurs), 2015. Archived copy
- 16 Startup Metrics. Jeff Jordan, Anu Hariharan, Frank Chen and Preethi Kasireddy (Andreessen Horowitz), 21 Aug 2015. Archived copy
- SaaS Metrics 2.0 – Detailed Definitions. David Skok (For Entrepreneurs), 4 Jul 2014 (updated 21 Dec 2020). Archived copy
- SaaS Metrics 2.0 - A Guide to Measuring and Improving what Matters. David Skok (For Entrepreneurs), 16 Jan 2013. Archived copy
- The Dangerous Seduction of the Lifetime Value (LTV) Formula. Bill Gurley (Above the Crowd), 4 Sep 2012. 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 the LTV:CAC ratio. Benchmarks compiled 2 October 2026.
- · Major · First published as "The LTV/CAC Ratio Depends on Whose Churn You Measure".
Cite this page
Dominique Bouillet, "LTV:CAC ratio: formula, calculator and 2026 benchmarks", CX Cash, updated Oct 6, 2026, https://cxcash.com/metrics/ltv-cac-ratio
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.