How to Calculate Your PPC ROI for Service Businesses

Many service business owners look at their Google Ads dashboard, see they spent $2,000, and have no idea if they actually made any money. Clicks and impressions don't pay the bills—booked jobs do.

To run a profitable campaign, you need to understand the math behind your marketing. As outlined in our Paid Advertising Guide, tracking your return on investment (ROI) is the only way to scale your business predictably.

1. Cost Per Lead (CPL)

Your Cost Per Lead is how much you spend to get one person to call you or fill out a form. If you spend $1,000 on ads and get 20 calls, your CPL is $50. But remember, a lead is not a customer yet.

2. Cost Per Acquisition (CPA)

Your Cost Per Acquisition is how much you spend to actually book a paying job. If you got 20 leads (at $50 each) but you only closed 5 of them, you spent $1,000 to get 5 jobs. Your CPA is $200.

This is the most important metric in PPC advertising. If your average profit on a job is $500, and your CPA is $200, your ads are highly profitable. If your profit is $150, you're losing money.

3. Customer Lifetime Value (LTV)

Most businesses only look at the revenue from the first job. But if an HVAC customer pays $200 for a tune-up today, they might pay $8,000 for a new system in three years. When you factor in LTV, you realize you can afford to spend much more to acquire a customer than your competitors.

4. The True ROI Formula

True ROI = ((Total Revenue from Ads - Ad Spend) / Ad Spend) * 100.

To track this accurately, you must use call tracking software and a CRM. You need to tie every booked job back to the exact keyword and ad that generated the call. If you need help setting this up, our paid advertising systems include full closed-loop reporting.

Frequently Asked Questions