Why Did My Cost Per Click Go Up?

A rising cost per click has six usual causes: more competitors, a falling Quality Score, broad match widening what you bid on, seasonal demand, a change in bidding strategy, or a landing page that got slower. Only one of those is outside your control. Diagnose which you have before touching a bid — the instinctive response of raising bids to defend position makes four of the six worse.

First, the framing question: has your cost per enquiry moved? If clicks cost more but leads cost the same, you have a pricing change, not a problem.

Cause 1: More competitors

How to check: Campaigns → Insights and reports → Auction insights. Compare the last 30 days against the previous 30. Look for new domains, or existing ones with a rising impression share.

Competition is the most common cause and the one you can do least about. New entrant, competitor raising budget, a large national brand deciding your city is worth targeting.

What you can do: compete on relevance rather than budget. A better Quality Score means paying less than a competitor for the same position. That is the whole game when someone outspends you.

What not to do: match their bid reflexively. That is an auction you lose slowly.

Cause 2: Quality Score fell

How to check: Keywords tab → add the Quality Score column, plus the three component columns: Expected CTR, Ad relevance, Landing page experience.

Quality Score is Google's judgement of how well your keyword, ad and landing page fit the search. It directly affects what you pay for a given position. A drop from 8 to 5 raises your cost for the same slot without anything else changing.

Read the components rather than the score:

• Ad relevance below average — the ad text does not match the keyword closely enough. Usually one ad group covering too many themes.
• Expected CTR below average — the ad is not compelling, or it is competing with a better-written one.
• Landing page experience below average — the page does not answer the search, or it is slow. See cause 6.

Cause 3: Match-type drift

How to check: search terms report, last 30 days versus the previous 30. Is it wider than it was?

Broad match hands Google discretion over which searches you pay for. That discretion widens over time, particularly after Google adjusts how broad match works — which happens without notice.

The signal: rising CPC and a search terms report full of queries you would not have chosen. That is drift, not competition, and it is fixable today by adding negatives and tightening match types.

Also check whether someone enabled "Search partners" or "Display expansion". Both quietly widen where your ads run.

Cause 4: Seasonality

How to check: compare against the same period last year, not last month.

Some categories have brutal seasonal swings. Everyone bids harder in the same weeks, so everyone pays more. Ramadan and Eid compress buying into short intense windows and drag click prices with them; so do the weeks before any major shopping season.

If this is your cause, the answer is planning rather than reacting. Budget for the expensive weeks and accept the price, or shift budget to the cheaper ones if your product allows.

Cause 5: The bidding strategy changed

How to check: Campaign → Settings → Bidding, then Change history for the account.

Switching from Manual CPC to Maximise Conversions or Target CPA will change your CPC, often sharply, and that is the strategy working as designed — it will pay more for a click it believes converts. The question is whether cost per conversion improved.

Two specific traps:

• A Target CPA set too high gives the algorithm permission to pay far more per click than you intended.
• Smart bidding without enough conversion data. Below roughly 30 conversions a month, it is guessing, and it guesses expensively. Fix tracking and volume before automating.

If tracking broke recently, smart bidding is optimising against a gap. Fix that first — it makes every other diagnosis unreliable.

Cause 6: The landing page got slower

The one most people never check, and the one most within your control.

Landing page experience is a Quality Score component. A page that got slower — a new plugin, an unoptimised hero image, a chat widget someone added — scores worse, and worse scores cost more per click for the same position.

How to check: run the landing page through PageSpeed Insights, mobile tab. Then ask what changed on that page recently.

Two things regularly cause it:

• A new script. Chat widgets, popups, tracking pixels, embedded maps. Each is third-party code at a speed you do not control.
• An image swap. Someone replaced a hero with a 2MB photograph straight from a camera.

Image optimisation and Core Web Vitals cover the fixes. The relevant point here is that they are not only SEO work — they show up on your ad invoice.

The check most people skip

Did your position change?

Add the "Impr. (Top) %" and "Impr. (Abs. Top) %" columns. If those rose alongside your CPC, you are paying more because you are appearing higher — which may be exactly what your bidding strategy was told to do.

Paying more for a better slot is a different situation from paying more for the same slot. Only the second is a problem.

What to actually do

In order:

1. Compare cost per enquiry, not cost per click. If leads cost the same, stop here.
2. Check position. If you moved up, the CPC rise is bought, not lost.
3. Check Quality Score components. Fix the below-average one.
4. Read the search terms report. Add negatives. Immediate saving.
5. Check what changed on the landing page. Speed and relevance both.
6. Check Auction insights last. It is the cause you can do least about, so it should not be the first thing you look at.

And the thing not to do: raise bids to defend position before working through the list. It treats every one of these causes identically, and it is the only response that guarantees paying more.

Where to go next

The full account audit covers where budget leaks beyond click price. If conversions look wrong as well as costs, start with tracking.

We run Google Ads for 20% of monthly ad spend, with a $200 minimum and the account owned by you — the details.

If your costs moved and none of the five explanations above fits, ask us to look — working out which one it is costs nothing.