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How to Calculate AdWords Profitability for your SaaS Business

3 Min Read

Google Ads (formerly AdWords) is a core digital marketing channel for most businesses. But how do you know whether it will be profitable for you? 

In this post we’ll show you how to calculate if a PPC campaign will work for your SaaS business as a profitable customer acquisition channel. We’ll also provide a free PPC Profitability Calculator you can use to figure out if AdWords (or any other PPC channel) works for you.

Download Free: A/B Testing Guide

Seven easy steps to calculate the profitability of Google Ads

Step 1: Find a keyword you want to bid on

Find a keyword that is relevant to your product or business. As an example, let’s assume your product is a self-service tool to create and host landing pages, so ‘landing page creator’ will be a relevant keyword. Go to Google Adwords and click on Keyword Planner tool under the Tool menu.

Keyword Planner
Image source: Google

Click on ‘Get traffic estimates for a list of keywords’ and type ‘landing page creator’. This will show you a graph of how many clicks and impressions the keyword gets in a day and at what cost. See here how to create high-converting search ads.

Step 2: Decide your average CPC

If the CPC you’re willing to bid is lower than the maximum shown, shift the slider to bring it to your desired CPC. In this example, we set it at $4.


With CPC set at $4, 100 clicks on the ad will cost a total of $400. If I get 100 clicks on the ad for the duration of the campaign, then I’ve spent a total of $400.

Step 3: Calculate the average number of free trials

Assuming the AdWords visitor to free trial conversion rate is 10%, then you’ve just acquired 10 free trial users at a total cost of $400 — meaning $40 per free trial customer. Tip: optimizing your landing pages will help to maximize conversions from website visitors into free trials and customers. VWO Testing allows you to A/B test any element on your website and increase conversion rates.

Step 4: Calculate the number of paying customers

According to Userpilot, the average conversion rate for free trial to paying customers is 25%. But let’s be conservative and use a 15% conversion rate for this example. So the number of paid customers will be 15% of 10 (number of free trials), giving us 1.5 paying customers.

Step 5: Calculate your customer acquisition cost (CAC)

The number of paying customers acquired from that investment was 1.5. So, the average customer acquisition cost (CAC) is $400 / 1.5 = $266. This may sound expensive, but to understand whether you’ve made a profit we need to take into account the revenue from a customer on average.

Step 6: Calculate the average customer lifetime value (LTV)

Simply determine the average number of months a customer pays for your product before churning, and the value of the most commonly bought subscription plan. Suppose your most commonly bought plan is $49 and the average lifetime is 10 months, then the average customerlifetime value (LTV) is $49 x 10 = $490

Download Free: A/B Testing Guide

Step 7: Deduct CAC from LTV to calculate gross profit

LTV = $490

CAC = $266

Gross profit = $224

So we calculate that from this Google Ads cost, you’ll make a profit of $224. From an AdWords purely marketing perspective, this seems okay as this marketing channel is profitable. But in truth, there is more to consider.

Considering profitability more broadly

AdWords probably won’t be your only marketing channel, and there are other costs beyond media spend to calculate the Return On Investment (ROI) of all your marketing efforts. But you can use these same calculations to determine the profitability of any sales or marketing spend. Also, consider other operating costs such as salaries, rent, and hardware to calculate the profitability of your company overall. If you’ve got the exact numbers down, you’re good. If not, then aim for LTV to be at least three times CAC.

Here’s the AdWords / PPC Profitability calculator

PPC Profitability calculator
PPC Viability Calculator

Access the calculator on Google Spreadsheets here.

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Mohita Nagpal
Mohita Nagpal A lover of the written word, I plan to be the planet's first sit-down comedian. When I am not rethinking a misplaced comma, I write about conversion optimization and website usability. You can follow me @mohitanagpal
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