A client acquisition audit verifies whether a company can continue to generate revenue after its acquisition. It helps the buyer understand where customers come from, how much they cost to acquire, and whether marketing results can be maintained after the owner leaves.

A company can show strong growth while relying on a fragile acquisition system. Sales might depend on a single advertising channel, imprecise attribution, a personal brand, or expenses that are no longer profitable.

The audit's objective is therefore not just to measure past performance. It aims to determine if future revenues are predictable, profitable, and transferable.

Summary: A client acquisition audit analyzes the cost of acquisition, customer lifetime value, channel profitability, conversion rates, attribution quality, and reliance on certain platforms. It enables the buyer to assess whether growth can continue after the transaction.

What is a client acquisition audit?

A client acquisition audit is a structured analysis of the methods used by a company to attract, convert, and retain its customers.

It covers marketing channels, advertising spend, sales data, conversion rates, margins, and follow-up processes.

In the context of an acquisition, this audit seeks to answer several questions:

• What channels actually generate customers?
• How much does it cost to acquire a new customer?
• Which segments are the most profitable?
• Is the presented data reliable?
• Does growth depend on the owner?
• Can marketing expenses be increased?
• Can results be maintained after the transaction?

In practice, the analysis should not stop at revenue generated. A channel can produce a lot of sales but create little value if margins are low, customers are not loyal, or expenses are difficult to control.

Why audit client acquisition before a purchase?

Client acquisition directly influences the quality and continuity of revenue.

A company whose sales rely on diversified, profitable, and documented channels generally presents fewer risks than a company dependent on a single source of leads.

The audit specifically verifies:

• The actual profitability of marketing.
• The stability of the acquisition cost.
• The quality of customers obtained.
• The company's ability to retain its customers.
• Reliance on Google Ads, Meta, or another platform.
• The proportion of organic growth versus acquired growth.
• The quality of attribution data.
• The possibility of increasing spending without reducing margins.

It is common for a company to present its marketing results in the best possible light. The buyer must therefore reconcile advertising data, CRM data, and financial results.

How to verify a company's customer acquisition cost?

The customer acquisition cost, or CAC, represents the average cost required to acquire a new customer.

The basic formula is:

CAC = acquisition expenses ÷ number of new customers acquired

This formula seems simple, but its application can vary considerably depending on the expenses included and the quality of the data.

What expenses should be included in CAC?

CAC should include costs directly related to acquiring new customers.

Depending on the business model, it may include:

• Advertising expenses.
• Agency fees.
• Marketing team salaries.
• Sales team salaries.
• Commissions.
• Marketing software.
• Events and sponsorships.
• Content production.
• Prospecting tools.
• Partnership-related fees.

A CAC calculated solely from the advertising budget risks underestimating the actual cost.

How to calculate CAC per channel?

The company's average CAC is not enough. The buyer must calculate it separately for each channel.

This analysis reveals performance differences between channels. It also helps identify those that appear profitable only because certain costs were omitted.

Why analyze CAC over multiple periods?

CAC should be studied over several months or years.

A short period can be influenced by:

• Seasonality.
• An exceptional promotion.
• A temporary increase in budgets.
• An agency change.
• A brand campaign.
• A market change.

The buyer should look for a stable trend or clearly understand the reasons for any deterioration.

Key takeaway: A low CAC is not always a positive sign. It's important to verify if the calculation includes all costs, if customers are profitable, and if the result can be reproduced on a larger scale.

How to analyze LTV and margin per segment?

Customer lifetime value, or LTV, represents the economic value a customer generates throughout their relationship with the company.

It can be calculated in a simplified way:

LTV = average revenue per customer × gross margin × average relationship duration

LTV must be analyzed with CAC. A high acquisition cost can be acceptable when customers stay for a long time, buy regularly, and generate good margins.

Why segment LTV?

A global average can mask significant differences between customer categories.

The buyer should analyze LTV based on:

• The acquisition channel.
• The product purchased.
• The industry sector.
• The customer size.
• The region.
• The sales representative.
• The acquisition cohort.
• The contract type.

A customer acquired through organic SEO might have a higher LTV than a customer obtained through a paid promotion.

Similarly, a segment might generate a lot of revenue but be unprofitable due to discounts, required service, or a high churn rate.

What CAC-LTV ratio to look for?

The ratio between LTV and CAC helps assess whether the value created by a customer sufficiently exceeds their acquisition cost.

The formula is:

LTV/CAC Ratio = LTV ÷ CAC

A ratio greater than 1 means that the estimated customer value exceeds their acquisition cost. However, this does not guarantee good profitability.

It is also necessary to consider:

• The time required to recover the CAC.
• Overhead costs.
• Service costs.
• Refunds.
• Customer churn.
• Working capital requirements.

In a transaction, the quality of the calculation method matters as much as the presented ratio.

How to know if a company's marketing is profitable?

Marketing is profitable when it generates a financial contribution greater than the costs incurred.

Revenue alone does not measure this profitability. It is necessary to analyze the margin generated after variable expenses and acquisition costs.

A simplified formula can be used:

Marketing profitability = margin generated by acquired customers − acquisition costs

The analysis should include:

• Revenue attributed to the channel.
• Gross margin.
• Advertising expenses.
• Agency fees.
• Commissions.
• Refunds.
• Discounts.
• After-sales service costs.

Return on ad spend

Return on ad spend is often called ROAS.

It is calculated as follows:

ROAS = revenue attributed to advertising ÷ advertising expenses

A ROAS of 4 means that every dollar invested in advertising generated four dollars in attributed revenue.

However, this result does not measure net profitability.

A company with a low gross margin can show a high ROAS while losing money after agency fees, commissions, and operational costs.

Actual return per channel

How to analyze conversion rates?

The conversion rate indicates the proportion of people who move from one stage to the next in the customer journey.

It can measure:

• The transition from a visitor to a lead.
• The transition from a lead to a quote.
• The transition from a quote to a sale.
• The transition from a trial to a subscription.
• The transition from a first purchase to a recurring purchase.

The formula is:

Conversion rate = number of conversions ÷ number of opportunities × 100

Why analyze the entire funnel?

A good conversion rate on the website does not guarantee good sales performance.

For example, a form might generate many unqualified leads. The initial conversion rate will be high, but few sales will be concluded.

The buyer should therefore analyze the entire journey:

• Visits.
• Leads.
• Qualified leads.
• Quotes.
• Sales.
• Recurring customers.

What discrepancies should attract attention?

Certain discrepancies can indicate a problem:

• Many leads, but few sales.
• A highly variable conversion rate depending on sales representatives.
• A significant difference between website data and CRM data.
• A recent unexplained decline.
• Sales attributed to multiple channels simultaneously.
• Leads difficult to link to recorded revenue.

How to verify a company's marketing attribution?

Marketing attribution involves determining which channels or interactions contributed to a sale.

It is essential for calculating CAC, campaign performance, and channel profitability.

Imprecise attribution can lead the buyer to overestimate marketing effectiveness.

What attribution models are used?

The main models include:

• First touch.
• Last touch.
• Last non-direct click.
• Linear attribution.
• Position-based attribution.
• Algorithmic attribution.

Each model distributes credit differently among channels.

A last-click model might assign all value to Google Ads, while organic content, a recommendation, or a brand awareness campaign influenced the customer earlier.

How to verify attribution quality?

The buyer should compare multiple sources:

• Advertising platforms.
• Website analytics tools.
• CRM.
• Sales data.
• Invoices.
• Sources declared by customers.
• Promotional codes.
• Tracked phone numbers.

It is common for advertising platforms to attribute more conversions than the actual number of sales.

This difference can result from different attribution windows, duplicated conversions, assisted sales, or incomplete tracking.

Signs of fragile attribution

• Sales are not linked to the CRM.
• Conversions are configured differently across platforms.
• Phone calls are not tracked.
• Data was lost during a migration.
• Campaigns use inconsistent parameters.
• Offline sales are not imported.
• The same revenue is attributed to multiple channels.
• Reports are produced manually without validation.

Summary: To verify marketing attribution, the buyer must reconcile advertising, analytical, commercial, and financial data. An advertising platform should never be the sole source used to confirm channel profitability.

How to analyze reliance on Google Ads?

Reliance on Google Ads exists when a significant portion of leads or sales would quickly disappear if campaigns were paused.

This reliance is not necessarily negative. Google Ads can be a profitable, stable, and predictable channel.

However, the risk increases when:

• A large proportion of revenue comes from a single account.
• Costs per click increase rapidly.
• Campaigns rely on a few keywords.
• Profitability depends on branded keywords.
• Conversion tracking is incomplete.
• The company does not have administrative access.
• An agency fully controls the strategy.
• Campaigns cannot be reproduced without a specific person.

Branded demand and acquired demand

Some advertising conversions may come from people who were already searching for the company by its name.

These campaigns capture existing demand rather than necessarily creating new customers.

The buyer should distinguish between:

• Campaigns based on the company name.
• Campaigns for products or services.
• Competitive campaigns.
• Prospecting campaigns.
• Remarketing campaigns.

Strong performance primarily from brand searches can overestimate Google Ads' actual ability to generate new demand.

How to test reliance?

The analysis may include:

• The share of revenue attributed to Google Ads.
• CAC excluding brand.
• Performance by campaign type.
• Evolution of costs per click.
• Margin after advertising.
• Ability to reduce spending without equivalent revenue loss.
• Performance of other channels.

How to measure the risk of marketing channel concentration?

Concentration risk appears when a significant portion of acquisition depends on a small number of channels.

A company can be vulnerable even when the main channel is profitable.

An algorithm change, cost increase, account suspension, or new rule can quickly affect sales.

What levels of concentration to analyze?

The buyer should measure concentration based on:

• Marketing expenses.
• Leads.
• New customers.
• Revenue.
• Margin.
• Customer segments.
• Platforms.
• Keywords.
• Partners.

Example of Concentration

A company generates 75% of its new customers through Google Ads.

The channel is profitable, but a 30% increase in cost per click could significantly reduce the margin.

The buyer should then verify:

• If the channel can absorb a cost increase.
• If other channels can take over.
• If prices can be adjusted.
• If the conversion rate can be improved.
• If the company has organic demand.

Organic Growth vs. Acquired Growth: What's the Difference?

Organic growth comes from channels that do not require direct payment for each visit or lead.

This may include:

• Search engine optimization (SEO).
• Recommendations.
• Word-of-mouth.
• Repeat customers.
• Lasting partnerships.
• Brand awareness.

Acquired growth primarily relies on advertising spending or commissions directly associated with acquisition.

Both forms of growth can create value. However, their risk profiles are different.

A company whose growth depends almost entirely on advertising spending can be successful, but it must demonstrate that this growth remains profitable as budgets increase.

How to Verify the Ability to Increase Marketing Spending?

The ability to increase spending without significantly degrading profitability is an important indicator of growth potential.

A channel can be profitable with a budget of $20,000 per month, but no longer at $50,000.

This deterioration can be explained by:

• A limited audience.
• An increase in cost per click.
• A decrease in lead quality.
• Market saturation.
• A decrease in conversion rate.
• Insufficient operational capacity.

How to Analyze Scalability?

The buyer should compare expenditures and results over several periods.

They can notably check:

• The evolution of CAC as the budget increases.
• The evolution of ROAS.
• The margin per customer.
• The quality of leads.
• The CAC recovery period.
• The team's capacity to handle the volume.
• The retention rate of new cohorts.

If CAC increases faster than LTV or margin, growth can destroy value.

What Documents to Request During the Audit?

The buyer should request sufficiently detailed data to verify the seller's claims.

Useful documents include:

• Monthly marketing expenses by channel.
• Advertising reports.
• CRM reports.
• Website conversion data.
• Sales by source.
• Retention rates.
• Revenue by segment.
• Margins by product or service.
• Contracts with agencies.
• Contracts with partners.
• Executive dashboards.
• Definitions of the metrics used.

Why Reconcile Marketing and Financial Data?

Marketing reports and financial statements do not always measure revenue in the same way.

The buyer must verify if:

• Attributed sales actually appear in accounting systems.
• Refunds are deducted.
• Canceled orders are excluded.
• Taxes are handled uniformly.
• Recurring revenue is properly identified.
• Analysis periods correspond.

What Warning Signs to Monitor?

Certain elements may indicate that the acquisition system is less robust than it appears.

• CAC is not calculated by channel.
• Team costs are not included.
• LTV relies on unverified assumptions.
• Advertising data does not match CRM.
• A single platform generates the majority of sales.
• Brand campaigns account for a large share of conversions.
• Growth slows when budgets increase.
• The owner personally generates the main leads.
• Accounts belong to an agency or an employee.
• Recent conversion rates are decreasing.
• New customers are less profitable than old ones.
• Historical data is incomplete.

Customer Acquisition Audit Checklist

Conclusion

A customer acquisition audit helps determine whether a company's revenue relies on a sustainable system or on conditions that are difficult to replicate.

CAC, LTV, conversion rates, and ROAS are important, but they must be analyzed together. No single indicator is sufficient on its own to confirm marketing profitability.

In practice, the buyer must primarily verify data quality, channel diversity, generated margin, and the system's ability to continue without the owner.

A company with profitable, documented, diversified, and transferable acquisition generally presents a lower business risk. Conversely, a strong dependence on one channel, fragile attribution, or rising CAC may justify adjustments in the valuation and terms of the transaction.

FAQ on Customer Acquisition Audit