Practical guide to calculating your CAC and marketing ROI in your dealership

What is CAC and why is it key for a dealership?

The CAC (Customer Acquisition Cost) is the average cost you incur to acquire a new customer. In the context of a dealership, it includes everything you invest to close a sale: advertising, marketing tools, salaries of the sales team, commissions, and any expenses related to lead generation.

Simple example: if you spend €3,000 a month on marketing and achieve 10 sales, your CAC is €300 per customer.

Why does it matter? Because it allows you to know if you are overspending to acquire customers, if your strategy is profitable, and when it’s time to adjust your campaigns.

How to calculate CAC step by step

1. Add up all marketing and sales expenses over a period (monthly, quarterly)

Include:

• Online advertising (Google, Meta, portals)

• Salaries and commissions of salespeople

• Automation and CRM tools

• External agencies or freelancers

2. Divide that total by the number of customers acquired during that period

Formula:

CAC = Total spending on marketing and sales / Number of new customers

Practical example:

• Spending: €4,500

• Sales: 15 cars

• CAC: €4,500 / 15 = €300 per customer

Tip: Use a CRM to record the source of each customer. The better you attribute the sale to the channel, the more accurate your CAC will be.

What is marketing ROI and how is it interpreted?

The ROI (Return on Investment) is the return you get for every euro invested in marketing. It is one of the most important indicators to know if your campaigns are profitable.

Why is it vital? Because it’s not just about selling, but about making money with those sales. A positive ROI indicates that marketing is working; a negative one means you are losing money.

Caution: A low ROI is not always bad if you are gaining volume, but it should be compensated at a global level.

Formula to calculate ROI in marketing for dealerships

ROI = [(Revenue generated - Marketing investment) / Marketing investment] x 100

Applied example:

• Revenue generated from sales = €50,000

• Total marketing investment = €5,000

• ROI = [(50,000 - 5,000) / 5,000] x 100 = 900%

This means that for every euro invested, you earned 9.

Advice: Make sure to include only those sales attributable to marketing, and measure by channel if possible (Google Ads, social media, email, etc.).

Common mistakes when calculating CAC and ROI in dealerships

• Not including all actual costs, such as salaries or tools

• Not correctly attributing customers to the channels that originated them

• Mixing periods or types of campaigns, making comparison difficult

• Ignoring offline leads, such as those that come through referrals or by phone

Tips to improve your CAC and maximize ROI

• Optimize your campaigns: invest more in the channels that convert best

• Qualify leads well: don’t waste time on contacts without real interest

• Automate responses and follow-ups: speed up the closing

• Retain your customers: a repeat customer has nearly zero CAC

• Align marketing and sales: when they work together, results improve significantly

Recommended tools

• Dealcar: A specialized software for dealerships that allows you to record leads, link them to sales, and visualize CAC and ROI in real time from an intuitive dashboard.

• HubSpot or Zoho CRM: Good options for customer management if you already have more complex processes

• Google Analytics and Looker Studio: to measure web conversions and build visual dashboards

• Custom spreadsheets: useful for starting to control if you don’t use integrated software

Conclusion: measure to scale

Measuring your CAC and ROI gives you real control over your marketing strategy. In a competitive sector like automotive, knowing which channel works, how much each customer costs, and how much profit each invested euro brings can make the difference between growing or stagnating.

It’s not just about investing in marketing, but doing it intelligently. And that starts with measuring correctly.

Frequently Asked Questions (FAQs)

What is a reasonable CAC for a dealership?

It depends on the type of car, the acquisition channel, and the profit margin. As a general rule, it should be below 10-15% of the net margin of each sale.

How long can it take to see a positive ROI?

There are campaigns that generate quick results (like occasional promotions) and others that take time (branding, SEO positioning). In general, a good measurement system starts to provide clear insights in 30-90 days.

Can the ROI of offline campaigns be measured?

Yes, if you implement traceability mechanisms such as coupons, customer origin surveys, or specific promotional codes.