Does customer acquisition cost inevitably rise as a company scales?

Harry Stebbings · May 24, 2021 · hedged

Early-stage CAC is a transient signal: it is often at its lowest with the earliest, most aligned users and then shifts over time as acquisition broadens or brand builds

The earliest cohorts are the most aligned users, so acquisition costs are artificially low and then move as brand and channels change

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Harry Stebbings · Jan 18, 2023

Founders who present a fixed forever CAC are wrong: as you saturate your initial market, subsequent users are both lower quality and more expensive to acquire.

Market saturation degrades both the quality and the price of incremental users.

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Mike Salguero · Apr 5, 2023

Customer acquisition costs inevitably rise over time because the earliest cohorts are the cheapest and most loyal, and once the predisposed market is exhausted you must spend on brand campaigns to create demand

Early adopters already want the product and can be captured with cheap search/influencer tactics; only ~2% of the US was predisposed to buy grass-fed beef, so further growth requires expensive market creation

Scope: drawn from ButcherBox's grass-fed beef category

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Phil Carter · Sep 20, 2024

For all but the outliers, CAC rises over time almost by definition — because you exhaust high-intent early adopters and because paid channels lose efficiency as spend scales up

As average user intent drops, cost per install rises and every funnel metric (activation, trial start, trial conversion) gets harder to hold; and throwing too much money at Facebook or Google too fast pushes you into lower-intent users and lower-quality ad inventory

Scope: excludes viral outliers

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Matt Pohlson · Jun 6, 2025 · hedged

The general law of CAC is that it rises over time; brand-building can mitigate but not reverse it, so companies should model it as increasing

You saturate audiences over time; a broadly appealing product lets you keep finding untapped pockets, which slows but doesn't stop the rise

Scope: Omaze is advantaged by broad appeal across age, gender and income

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Dominik Richter · Dec 1, 2023

Customer acquisition cost neither simply rises nor falls with scale: deeper penetration of a TAM pushes it up while brand and a large past-customer database pull it down, and the two effects largely offset.

Both dynamics operate simultaneously as you gain tenure in a market, so the net direction depends on which effect dominates in a given category.

Scope: net outcome depends on the category

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Antoine Le Nel · Oct 18, 2024

CAC over time is driven by two opposing forces — a growing brand generating organic growth that feeds the engine, versus diminishing returns as you saturate — and which dominates depends on how competitive the market is

In some markets the brand gets big enough that growth becomes self-feeding and organic; in others each incremental user gets more expensive, largely as a function of competition

Scope: outcome varies by market

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Kyle Norton · May 30, 2025

Whether customer acquisition gets cheaper with scale depends on market size — many markets saturate after the early adopters and see costs rise, but Owner's are falling rapidly

Owner made heavy upfront investments in RevOps, enablement, data and biz ops that look overweight for its ARR, but those systems make it increasingly efficient as reps and demand-gen spend scale

Scope: market-dependent

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Thomas Plantenga · Feb 12, 2024

Blended CAC and payback should fall over time as organic acquisition grows, but the cost of directly marketing-acquired new users rises as the marketplace matures

Once you already hold a large share of the population, the remaining directly acquirable users get harder to reach, while organic and word-of-mouth carry more of the volume

Scope: depends on how you define 'customer' — blended versus marketing-attributed

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Luke Harries · May 23, 2025 · hedged

CAC rises over time within any specific channel, but blended CAC can be held flat by adding new channels, increasing virality, and improving activation and conversion to paid

New channels and funnel improvements offset saturation in existing channels

Scope: blended CAC staying flat is the hoped-for outcome

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Jeff Jordan · Jan 16, 2023

You should underwrite CAC on the assumption it will only rise, so a tight LTV:CAC ratio is a serious warning sign — 2:1 is a big problem, 4:1 still makes him lean back, 20:1 is tolerable

In his experience CAC typically goes up as you scale acquisition, partly from competitive dynamics as many similar companies chase the same consumer, and it isn't within the company's control

31:01 Underwrite cac as only rising tight ltv cac ratios are a warning sign

Dave Kellogg · Jan 31, 2024

CAC should go down over time, and the 'we picked all the low hanging fruit' explanation for rising CAC is usually a cop out

Startups making that argument are vastly underestimating the size of their market — a $5M company in a really big market has not exhausted the easy customers

14:18 Low hanging fruit explanation for rising cac is usually a cop out market is bigger than assumed

Akshay Kothari · Sep 18, 2024

There are ~99 ways to burn money and only one good way to effectively make it — very few acquisition channels actually scale, and taking a working channel from 1x to 10x while holding unit economics is very hard

Channels that work at small scale often degrade into bad channels once you put more money in

29:01 Very few channels scale 10x while holding unit economics

Andrew Dudum · Apr 4, 2026

CAC does not only ever go up — at scale, brand value and product assortment unlock new channels and efficiency

Leverage accelerates with assortment and scale, unlocking new channels and efficiency

54:25 Scale brand and assortment unlock cheaper channels