Google Ads conversion tracking is a small piece of code that tells Google which clicks turned into a lead or a sale. You create a conversion action in your Google Ads account, install the Google tag on your site, and fire the conversion on the page or button that counts. Setup takes under an hour. Keeping it accurate is the part that goes wrong.
Most accounts we look at have tracking installed. Far fewer have tracking that tells the truth. The tag is there, numbers appear in the dashboard, and everybody assumes it is fine.
Conversion tracking almost never breaks loudly. It breaks quietly, the reports keep filling in, and nobody checks.
How do you set up Google Ads conversion tracking?
You do three things: define what counts as a conversion, install the Google tag on every page of your site, and attach the conversion action to the moment the action happens.
Google’s own conversion tracking setup documentation covers the click by click for websites, calls, app installs and offline imports. We are not going to rewrite it here.
What it will not tell you is which conversion actions are worth counting. Before you install anything, decide this:
- Primary conversions. The things that make you money. A submitted form, a booked call, a completed purchase, a phone call over a set length.
- Secondary conversions. Useful to see, but not what bidding should chase. Newsletter signups, PDF downloads, chat opens.
- Not conversions at all. Page views, scroll depth, time on page, clicks on the menu.
Only primary conversions belong in the “Primary action” list, because those are the only ones Smart Bidding should chase. Everything else goes in as secondary, so you can still see it without it steering your budget.
Why does bad conversion tracking cost more than no tracking?
Because Google’s automated bidding believes whatever you tell it. If your conversion data is wrong, the machine spends your money getting you more of the wrong thing, faster.
Google’s Smart Bidding documentation describes strategies that use your conversion data to set bids at auction time. That is powerful when the data is clean, and an amplifier pointed the wrong way when it is not.
An account with no tracking is flying blind, which is bad. An account with broken tracking is being steered off the road, which is worse. The person with no tracking knows they do not know. The person with broken tracking is confident and wrong.
What are the six ways conversion tracking breaks?
These are the failures we run into most often. None of them throw an error. All of them change what you decide to do with your budget.
1. The same conversion gets counted twice
This happens when the tag sits in two places, usually the site theme and Google Tag Manager, or when a thank you page refires the tag on every refresh.
The signal is a cost per lead that is roughly half what your sales team says it is. Load your thank you page with Google’s Tag Assistant and count the conversion hits. Two hits on one page load means you have been doubling your numbers.
2. You are counting form views instead of form submissions
A tag placed on the contact page fires when the page loads. So every person who looked at the form and left is recorded as a lead.
It is common with popup forms and embedded booking widgets, where there is no separate thank you URL to fire on. Fire on the submission event or a real confirmation state instead. If your conversion rate on the contact page is above 50%, this is almost certainly what is happening.
3. Soft actions are set as primary conversions
Scroll depth, a 30 second page view, a tap on the phone number that never became a call. Each is easy to track and each makes the dashboard look great.
The tell is simple and painful: the reports show hundreds of conversions and the phone does not ring. If conversion volume and your sales pipeline are not moving together, look at what you flagged as primary.
4. A website redesign wiped the tag
New theme, new page builder, new developer, and the code that lived in the old header is gone. Nobody notices, because conversions do not hit zero the same day. They taper as the last delayed conversions land.
Any time your site changes, someone has to submit a test form and confirm a conversion is recorded. Put it on the launch checklist next to checking that the contact form still sends email. Our guide to high converting PPC landing pages covers what else to verify before a new page takes paid traffic.
5. Consent mode and cookie banners are suppressing conversions
If a visitor declines cookies, the conversion may not be attributed to the click. Google will under-report, sometimes badly, and it will look like performance dropped.
This bites hardest on EU and UK traffic, but consent banners are everywhere now. The symptom is a gap between what Google Ads reports and what your CRM records, with the CRM showing more. That gap is not fraud. It is consent.
6. Offline sales never get sent back to Google
The form fills are tracked. What happens after is not. So Google optimizes toward whichever campaign produces the most form fills, even if none of those forms ever become customers.
This is the biggest one for long sales cycles: legal, home improvement, B2B, high ticket services. Importing offline conversions from your CRM lets bidding chase closed deals instead of raw inquiries. It takes work, and it is usually the highest value tracking change an account can make.
How do you diagnose which one is happening to you?
Start with the symptom you can see, then work back to the cause. This table covers the six failures above.
| Symptom | Likely cause | How to check |
|---|---|---|
| Conversion count is roughly double what sales reports | Tag installed twice, or thank you page refiring | Load the thank you page with Tag Assistant and count the conversion hits |
| Conversion rate on the contact page is above 50% | Tag fires on page load, not on submit | Open the form page and leave without submitting, then see if a conversion is recorded |
| Lots of conversions, no increase in calls or sales | Soft actions marked as primary | Open Goals and check which actions are set to Primary action |
| Conversions dropped off a cliff after a site update | Redesign or theme update removed the tag | Submit a test form yourself and confirm it appears in the account |
| Your CRM shows more leads than Google Ads does | Consent banner blocking attribution | Compare CRM lead count to reported conversions for the same date range |
| Campaigns with the cheapest leads close the fewest deals | No offline conversion import | Match closed deals in your CRM back to the campaign that generated them |
What this means for you: pick the row that matches what you are seeing and run that check before you change a single bid. Most “our Google Ads stopped working” conversations end at one of these six rows.
How often should you audit conversion tracking?
Test after every site change, and do a full check once a quarter even if nothing changed. Plugins update, tags get moved, and consent tools change their defaults quietly.
A full check is short. Submit a real test lead through every form on the site and confirm each one lands in the account within a day. Open your conversion actions and confirm the primary list still only contains things that make money. Then compare last month’s reported conversions against your CRM.
If those checks pass, your numbers are probably honest. Only then do benchmarks mean anything, and you can compare yourself against the cost per lead benchmarks for your industry with some confidence.
What should you track beyond the lead?
Track value, not just count. A conversion action with no value attached tells Google that a $200 job and a $20,000 job are the same event.
If you sell products, pass the real transaction value so bidding can chase revenue. If you sell services and cannot know the value at the moment of the form fill, use a sensible average per lead type, then correct it later with offline imports. Our explainer on what ROAS is and how to calculate it covers what to do with that data once it is flowing.
Common questions
How do I know if my Google Ads conversion tracking is working?
Submit a test lead through your own form and wait up to 24 hours. If it shows up in your conversion column, the tag fires. If it does not, either the tag is missing or it is attached to the wrong trigger. Doing this yourself once a quarter catches most problems early.
Why do Google Ads conversions not match Google Analytics?
They use different attribution rules and different lookback windows, so they will never match exactly. Google Ads credits the conversion to the date of the click, while Analytics normally credits it to the date of the conversion. Small gaps are normal. Gaps of 40% or more are worth investigating.
Should I use Google Tag Manager or the Google tag directly?
Either works. Tag Manager is easier to maintain once you have more than a few tags and survives site changes better. The direct tag is simpler if you track one or two things. The mistake is using both at once, because that is how duplicate conversions start.
What counts as a conversion in Google Ads?
Whatever you tell it to count, which is exactly why this matters. Purchases, form submissions, phone calls over a chosen length, booked appointments and offline sales are all valid. Page views and scroll depth can be tracked, but marking them as primary sends your bidding in the wrong direction.
Does conversion tracking affect how much I pay per click?
Not directly, but it changes which clicks Google buys for you. Smart Bidding uses your conversion data to decide where to bid up and where to pull back, so wrong data means it buys the wrong traffic. Fixing tracking often moves cost per lead more than changing bids does.
How long do Google Ads conversions take to appear?
Usually a few hours, sometimes up to 24. They are also reported against the date of the original click, so recent days keep filling in for a while. Do not judge yesterday’s performance yesterday.
Want someone to check your tracking before you spend more?
If your reports and your sales pipeline tell different stories, tracking is the first thing to fix, not the bids. Our Google Ads management team can run the six checks above on your account and tell you which numbers you can trust.
If you are also weighing up who should run the account, our guide to choosing a Google Ads agency lists the questions worth asking. Either way, get in touch and we will tell you what we find, with no pitch attached.
