Google Ads Not Converting? Diagnose It by Symptom

When someone gets in touch with a Google Ads account that’s not converting, they rarely open with the problem. They open with what they can see: “I’m getting clicks and nothing else”, “the forms come in but nobody buys”, “it worked fine last month”. Those are different sentences, and they point to different causes, so I’ve organised this diagnosis by symptom: find yours and follow the checks in order.

The logic is the one I follow when I audit an account: first I confirm the measurement is telling the truth, then I look at the traffic, and only then at the offer and the page. Skipping that order is the most expensive way to lose a month. I’ve seen teams rebuild an entire landing page when the real issue was a tag that stopped firing after a template change.

If you’re after a general review of setup problems, I already have a guide to the 45 most common Google Ads mistakes. This post works the other way round: from symptom to cause.

In 30 seconds:

• Before touching bids or ads, check that your conversion action is active and counting the right thing.
• Only primary conversion actions go into the “Conversions” column and into bidding (Google Ads Help).
• Google Ads files each conversion under the ad date, not the sale date, so the last few days always look worse than they are.
• Since 17 August 2026, budget-limited campaigns with a target CPA deliver closer to that target, even if they used to beat it.
• When Google Ads and your CRM disagree, it’s usually dates, windows and attribution before it’s fraud.

Quick map: what to check when Google Ads is not converting

This table is the short version of the whole post. If you only have five minutes, start with the middle column.

Getting clicks but no conversions?

Before you look at the landing page, look at measurement. In the conversion actions table, Google flags actions whose status is “Unverified”, “Tag inactive” or “Needs attention”, and recommends Tag Assistant to check them (Google Ads Help). If the status is wrong, any other conclusion is premature.

The test I always run is the dumbest one: I come in through an ad, fill in the form or buy something cheap, and check in Tag Assistant that the tag fires on the thank-you page and not on the form page. Sounds obvious. Even so, it’s the number one cause of “zero conversions” I find when I open a new account: forms that no longer redirect to a thank-you page, payment gateways that send users back to another domain, or tags left behind on the old version of the site.

If measurement is fine, then it’s time to look at traffic. Open the search terms report and read the real queries from the last 30 days. Are people searching for what you sell, or something next to it? A parts shop showing up for “how to fix” or a law firm showing up for “free template” will get clicks and no sales, and no landing page tweak will change that. The fix there is negative keywords and tighter match types.

Only once measurement and traffic are clean do I look at the page. Three things, in this order: the ad’s message matches the page’s, the form or cart works on mobile, and the offer holds up against the other three ads the user just saw.

So how much should it convert? For reference, LocaliQ’s 2026 report puts the average search conversion rate at 8.18% across all industries (LocaliQ). Treat that as an order of magnitude. An all-industry average hides huge gaps between, say, an emergency service and a B2B product with a long sales cycle.

Getting conversions but no sales or quality leads?

Getting conversions that never turn into sales almost always means Google is optimising towards something that isn’t your business. Google’s documentation says primary actions appear in the “Conversions” column and are used for bidding, while secondary ones are for observation only and go into “All conversions” (Google Ads Help). If “phone number click” or “contact page view” is set as primary, that’s what your bidding is chasing.

Here’s how I check it, in the conversion actions table:

1. What’s marked as primary. Keep only actions with real commercial value as primary: purchase, submitted form, a call over a certain length. Everything else goes to secondary.
2. How it’s counted. Google recommends counting “One” conversion per click for leads, because what matters is whether a lead was generated, not how many times the form was submitted, and “Every” for purchases (Google Ads Help). A form counted as “Every” gets inflated by refreshes and duplicates.
3. Where the junk leads come from. If they’re spam, the problem is the form (no validation, no filter field). If they’re real people who just aren’t a fit, it’s the targeting or the message.

The underlying issue is that Smart Bidding learns from the signal you give it. Feed it “form submitted” when half the submissions are tyre-kickers, and it’ll learn to bring you cheap tyre-kickers. The real fix is to import what happens next in your CRM: qualified lead, opportunity, sale. I walk through it in lead quality and offline conversions for B2B Google Ads, and the page side in landing pages for qualified B2B leads.

One detail worth knowing before you start: Google only keeps the GCLID for 90 days, so an offline conversion uploaded later won’t import (Google Ads Help). If your sales cycle is longer, upload an intermediate event (a qualified lead, for instance) that happens inside that window.

Is your CPA creeping up month after month?

A slowly rising CPA rarely has a single cause, so the first step is to put dates on the rise. Open the change history and match each step up in CPA with what was changed that week: bid target, budget, new keywords, paused ads. Half the time the answer is right there.

There’s a recent reason you’ll want to rule out. On 17 August 2026, Google changed how target-based strategies behave: budget-limited campaigns using target CPA or target ROAS now perform more consistently towards that target. Google’s own example is clear. If your target CPA is $10 and you’ve been getting $5, your actual CPA will now move closer to $10 (Google Ads Help). If your CPA went up after 17 August 2026 and your targets were loose, check the target before you touch anything else.

Other causes I see often:

• Changes that restart learning. Google says a bid strategy can take a few conversion cycles (typically 1 or 2) to calibrate after a change (Google Ads Help). Moving the target every week keeps the campaign permanently recalibrating.
• Broad match nobody is watching. Volume grows, but a growing share of spend drifts to ever more distant queries. It shows up in search terms; the campaign overview hides it.
• More competition. Auction insights tell you whether someone new has entered or a competitor is showing above you more often. There’s no settings trick for that: you need to revisit the offer, the ad and your margin.
• Seasonality. Compare against the same period last year, not just last month.

If you run automated bidding, Smart Bidding: when it works and when it fails covers the volume requirements and the cases where going back to more manual control makes sense.

Did conversions drop overnight?

A sudden drop, from one day to the next, is almost always technical. Business-driven drops (demand, price, competition) tend to be gradual. So the order changes here: website first, then measurement, and only then the account.

Before you panic, though, rule out the most common false alarm. Google Ads reports each conversion on the ad date, while other tools attribute it to the conversion date (Google Ads Help). Conversions can also keep arriving up to 90 days after the click depending on your window, which is why Google recommends your report’s date range end at least 30 days ago for complete data (Google Ads Help). Compare the last seven days with the week before and the recent week will always lose. Add the “Conversions (by conv. time)” column, which files each conversion on the day it happened, and compare using that instead.

If the drop is real, this is my checklist, in order of likelihood:

1. Did anything change on the website that week? New template, new form, domain migration, updated plugin. Ask whoever runs the site, with the exact date in hand.
2. Is the tag showing “Tag inactive”? If it used to work and now doesn’t, something broke after a setup that was correct.
3. Has the cookie banner changed? If you advertise in the European Economic Area, you have to collect consent and send Google the ad_user_data and ad_personalization signals. Google warns that blocking tags until the user interacts with the banner can lead to data loss (Google Ads Help).
4. Did someone switch an action from primary to secondary, or create a new one and disable the old one? The change history will show it.
5. Are the ads still serving? Disapproved ads, an expired payment method or a campaign paused by mistake all look like “conversions dropped” if that’s the only column you’re watching.

Is your campaign not spending its budget?

Underspending looks like a minor issue, but it caps volume and, with it, conversions. The bid strategy status column usually gives you the answer. Google lists four possible limits: inventory (available search volume), bid limits, budget and the strategy itself (Google Ads Help). Hover over the status and it’ll tell you which one applies.

What I see most often when a campaign won’t spend:

• A target CPA that’s too low. The strategy stops entering auctions it could win because the numbers don’t work at your target. If your real CPA sits at €60 and you ask for €25, it probably won’t spend.
• Not much real volume. Very specific exact-match keywords in a small niche with narrow location targeting. Google can’t spend on searches that don’t exist.
• Bid limits inherited from an old setup nobody remembers.
• Disapproved ads or assets leaving whole ad groups dark.

The fix isn’t always “raise the target”. Sometimes it’s accepting that the market is small and that the leftover budget will work harder in another campaign or another channel.

Does Google Ads show one number and your CRM another?

A mismatch between Google Ads and the CRM is the symptom that sparks the most arguments between clients and agencies, and most of the time nobody is lying: they’re comparing different things. Google Ads only counts conversions with an ad interaction from that same account, files them under the ad date and uses its own attribution model. Other tools may attribute to a different date or a different channel (Google Ads Help).

To reconcile the numbers, I always do the same four things:

• Align the period. Compare CRM leads by creation date with the “Conversions (by conv. time)” column in Google Ads, not with the standard one.
• Check the window. If you don’t customise it, the click-through conversion window is 30 days (Google Ads Help). A lead that arrives on day 35 exists in your CRM and not in Google Ads.
• Look for duplicates. A form action counted as “Every” plus a GA4 import of the same event is a classic. Google Ads ends up showing more conversions than real leads.
• See which leads have no GCLID. If the CRM doesn’t store the click ID, there’s no way to know which leads came from an ad, and the comparison turns into an estimate.

A simple example: someone clicks your ad on 28 June and submits the form on 3 July. Google Ads counts that conversion in June; your CRM counts it in July. Repeat that for every lead who takes a few days to decide and your month-end numbers never match, even with both systems set up correctly.

When the gap is stable (Google Ads always a bit above the CRM because of known duplicates, say), it’s not a serious problem. It gets serious when nobody can explain the gap, because then budget decisions are being made on a number nobody trusts.

What doesn’t this Google Ads diagnosis cover?

This post assumes the account is reasonably well built and something has stopped working, or never did. If the account has foundational problems (structure, badly defined goals, untested ads, unused assets), the symptom barely matters: go through the full list of mistakes I linked at the start, or follow the method in the Google Ads account audit, which reviews the whole account in a fixed order.

It also doesn’t cover what happens outside the account: price, stock, sales response times. In B2B, “it doesn’t convert” often means “nobody called the lead back for 48 hours”. You can’t fix that in Google Ads, but it’s worth checking before you blame the campaign.

When does it make sense to bring someone in?

You can do a good chunk of this diagnosis yourself with the table at the top and a free afternoon. Outside help makes sense in three specific situations, which are the ones I hear most on the calls I take:

• You’ve checked measurement and it still doesn’t add up. Tag, consent and offline import problems overlap, and they’re hard to isolate unless you’ve seen them many times.
• You’ve been changing things for two or three months and CPA won’t settle. Each change restarts learning, and sometimes what’s missing is someone who decides what not to touch.
• Nobody on the team has the hours. A proper diagnosis takes time, and the alternative is usually to keep spending month after month without knowing which part of the budget is actually working.

If you’re in one of those three, this is how I approach Google Ads management with companies: measurement first, then traffic, then the offer. Same order as this post.

Frequently asked questions

Why is my Google Ads getting clicks but no conversions?

The most common reason is that the conversion tag isn’t firing properly, so start by checking its status in the conversions table and running a test conversion with Tag Assistant. If measurement works, review your search terms: clicks often come from queries with no buying intent.

How long should I wait before deciding a campaign isn’t converting?

It depends on your conversion cycle. Google says a bid strategy usually needs one or two conversion cycles to calibrate after a change. If your customers take two weeks to decide, judging the campaign after five days means judging it half-finished.

Why does Google Ads show more conversions than my CRM?

The usual causes are actions counted as “Every” instead of “One”, duplicate events between the Google Ads tag and GA4, and micro-actions set as primary. It also matters that Google Ads files the conversion under the ad date while the CRM uses the lead date.

Can I trust the last few days of conversions in Google Ads?

Not fully. Conversions can arrive up to 90 days after the click depending on your window, and Google recommends reports end at least 30 days ago for complete data. For day-to-day tracking, use the “Conversions (by conv. time)” column.

Should I switch bid strategy if my CPA goes up?

Not as a first step. Check the change history, the target CPA and the search terms first. Since August 2026, budget-limited campaigns with a target CPA deliver closer to that target, so a loose target can explain the rise on its own.

Where to start tomorrow

If you only do one thing after reading this, open the conversion actions table and answer two questions. Are they all in a healthy status? Is whatever’s set as primary something you’d actually pay for? In my experience, those two answers explain more “non-converting” accounts than any change to ads or bids.

And if you’d rather go through it together, book a 30-minute call: we open your account, pin down the symptom, and you leave with the exact order of checks for your case.