User Acquisition Cost for Mobile Apps: Formula, Examples and Benchmarks

User acquisition cost (UAC) is the total you spend on marketing and sales in a period divided by the number of new users you gained in that same period. If you spend $10,000 in a month and gain 100 new users, your UAC is $100 per user¹. The number only means something when you compare it to what each user is worth over time, so the second half of this guide covers lifetime value (LTV) and the ratio between the two.

The rest of this page walks through the formula, which costs to include, how CAC differs from CPA, what typical acquisition costs look like, and how to judge whether your own figure is healthy.

What user acquisition cost means and how to calculate it

UAC measures how much a business spends to attract each new customer or user. For apps, the terms user acquisition cost and customer acquisition cost (CAC) describe the same idea. Zoomd calls it a critical metric for businesses of all sizes, and especially for startups still trying to establish themselves¹.

The formula

The basic formula is:

UAC = total marketing and sales spend ÷ number of new users acquired in the same period

Pipedrive writes the same formula as marketing costs plus sales costs, divided by new customers. Its example: $500 on marketing plus $1,000 on sales, with 20 new customers, gives a CAC of $75².

A fuller worked example

Count gives a monthly example for a software company in March³:

With 150 new customers that month, CAC is $45,000 ÷ 150 = $300 per customer. For an app, swap "customers" for new installs or new signups, depending on which event you treat as an acquired user. Pick one definition and keep it.

Costs you should include

HubSpot lists the costs that belong in CAC: content creation, social media campaigns, ad spend, salaries and commissions, and software tools⁴. Count adds indirect expenses people forget, such as employee benefits, office space allocated to sales, and tools shared across departments³.

Choosing a time period

CAC is usually calculated monthly, though quarterly or annual figures work too². Count notes that monthly CAC gives short-term insight, annual CAC smooths seasonal swings, and quarterly sits between the two³.

Variants of the calculation and common mistakes

One blended number hides a lot. Count describes three variants worth tracking separately³:

• Blended CAC includes all acquisition costs, organic and paid. Use it for overall acquisition performance.
• Paid CAC counts only paid marketing spend. Use it to judge advertising efficiency.
• Channel-specific CAC splits costs by channel, such as Google Ads, Facebook or email, so you can see which sources bring users most cheaply.

For an app, the gap between blended and paid CAC tells you how much organic channels like search, word of mouth and app store browsing are pulling down your average.

Mistakes that distort the number

Count flags three errors³:

1. Mismatched time periods. Using January's spend with February's user count gives a meaningless figure. Numerator and denominator must cover the same window.
2. Excluding hidden costs. Leaving out salaries, benefits or shared tools makes CAC look lower than it is.
3. Ignoring user quality. Counting every user equally misleads you when channels bring users with different retention or lifetime value.

That third point matters most for apps. Zoomd makes the same argument: not all customers are equal, and users who make repeat purchases or refer others are worth more than one-time buyers, so segment your users before deciding where to spend¹.

What CAC stands for and how it differs from CPA

In digital marketing, CAC stands for customer acquisition cost. Count defines it as the total expense a business incurs to acquire a single new customer, covering all marketing and sales costs divided by customers gained in a period³. App teams often say UAC instead, because many users never pay directly, but the math is identical¹.

CAC vs. CPA

The two are often used interchangeably, but they answer different questions. Pipedrive draws the line this way²:

• CAC is the total cost of gaining one paying customer across all sales and marketing. An agency spending $12,000 a month on ads, content, salaries and tools, and landing 15 clients, has a CAC of $800.
• CPA (cost per action) is a campaign metric. It tracks spend for one conversion, such as a sale, signup or consultation. The same agency spending $4,000 on LinkedIn ads that produce 20 discovery calls has a CPA of $200 per call.

The practical rule: use CPA to compare campaigns and channels, and use CAC to decide whether your whole acquisition effort is profitable. HubSpot frames CAC as the way to judge whether money spent acquiring customers is delivering a return⁴.

For an app, CPA might be cost per install from one ad set. CAC adds everything else: your designer's time on store screenshots, analytics subscriptions and the share of salaries spent on growth.

Related app metric: ROAS

Return on ad spend (ROAS) measures revenue earned per dollar of advertising. Divide the revenue from a campaign by that campaign's cost¹. ROAS sits alongside CPA as a campaign-level check, while CAC stays the business-level view.

What an average CAC looks like

There is no single average. Costs vary widely by industry, audience and sales model. Pipedrive publishes average CAC (organic and paid) for B2C startups, which is the closer comparison for most consumer apps²:

B2B figures from the same source run higher, such as $273 for SaaS and $923 for financial services. Pipedrive attributes this to longer, more complex sales cycles, offset by customers who stay for years². B2C buyers make smaller, faster purchases and switch brands easily, which is why consumer businesses lean on low-cost marketing.

Ranges by segment and company stage

Count offers wider ranges, labeled as industry estimates from various benchmarking studies³:

• Subscription media (digital content and streaming): $15–$150
• E-commerce: $45–$200
• Fintech: $175–$300
• Healthcare: $200–$500
• Travel and hospitality: $7–$30
• SMB SaaS: $205–$395

Count also adjusts by stage. Early-stage startups often run at 2–3 times the industry average because of experimentation costs. Growth-stage companies sit at 1–1.5 times, and mature companies at 0.8–1.2 times. If your app is new, a CAC above the published average is not automatically a failure.

Treat these numbers as a reality check, not a target. Count stresses that benchmarks help you spot when something looks off, but should not be treated as strict rules for your business³.

What a good acquisition cost is: comparing CAC to lifetime value

A good CAC is one that is lower than what users bring in over time. Every source here agrees that CAC should not be judged alone. Zoomd puts it bluntly: if UAC is higher than LTV, the business is losing money; if LTV is higher, it is profitable¹.

HubSpot gives a simple illustration: spending $500 to acquire customers who spend only $400 on average means losing money on every one⁴. Pipedrive shows how relative the number is. A $50 CAC loses money for a coffee shop whose customer buys one $5 latte, but can be good value for a SaaS company selling $300 yearly subscriptions².

The LTV:CAC ratio

Pipedrive's formula is LTV:CAC = average lifetime value ÷ CAC. Its example: LTV of $1,800 and CAC of $450 gives a 4:1 ratio. Below 1:1 means you pay more for customers than they are worth and need to cut acquisition costs².

Working out what a user is worth

The simplest starting point is average revenue per user. Zoomd's example: $100,000 in revenue from 1,000 customers means each signup is worth $100¹. LTV extends that across the full time a user stays, and Zoomd describes it as the cap on how much you should spend to acquire each user.

Zoomd breaks app LTV into three levers¹:

• Average purchase value, raised through upselling, cross-selling, bundling or targeted discounts.
• Number of purchases, raised through personalization, loyalty programs, referrals or push notifications.
• Retention period, extended by improving user experience, adding useful content or features, and re-engaging users at risk of churning.

Count also points to the CAC payback period, which shows how quickly you recover what you spent to acquire a user³. For subscription apps, a short payback matters as much as a healthy ratio, because cash spent on acquisition comes back only month by month.

How to bring your acquisition cost down

HubSpot's interviews with practitioners point to two recurring causes of high acquisition costs: poor audience targeting and weak data⁴.

Research your audience first

Build a clear profile of your ideal user and base campaigns on it. HubSpot recommends interviews, focus groups and surveys, the last being useful when personas are hard to pin down. One cautionary example from the same piece: a brand spent heavily on a celebrity endorsement that did not connect with its core audience, and learned to do deep research before large campaigns⁴.

Test constantly

HubSpot quotes one adtech marketer whose company aims for 10 tests per month across acquisition channels, and an investment adviser who says every dollar spent should test a hypothesis⁴. Pair this with channel-specific CAC so each test has a clear cost per user attached.

Shift weight toward cheaper channels

Once you track blended and paid CAC separately, you can see how much organic channels lower your average³. Pipedrive notes that consumer businesses tend to rely on low-cost marketing because they cannot afford high per-customer spend². Search content turns your site into an SEO engine by answering questions your future users search for online. Publishing blog posts based on Google search trends lets app founders track downloads from each post against its production cost to calculate channel-specific CAC. Content like this works best as one channel within a broader marketing plan, not a replacement for it.

Keep the inputs honest

Recalculate on the same schedule every time, include the hidden costs, and segment users by value. Zoomd's point stands: the more you know about which users return and refer others, the better you can direct spend toward them¹.