Planning your Google Ads Q4 budget: click prices, break-even and what invalid clicks add

Key takeaways

How much more budget do you need in Q4?

More than the click price alone suggests. In Channable's data, ad spend in the fourth quarter of 2025 was 47.9% above the first quarter, while the click price was 9.1% higher. For the same number of clicks, you need as much more budget as the click price rises.

The source is Channable's eCommerce Google Ads Benchmark. It covers merchants in the EU and the EEA, not the US. Channable makes software for product data.

In words: if the click price rises by 9.1%, you need 9.1% more budget to buy the same number of clicks. Spend rose much faster than the price. Since spend is clicks times price, most of the extra spend went into more clicks, though the report does not break this down.

Channable's own assessment is that a budget set against the first quarter will not carry through the fourth. That is their view, not a law, but it is a reason to check last year's numbers before you copy the budget of a quiet quarter.

How much does the click price really rise in Q4?

It depends on who measured it, when and where. The sources below give values from +9.1% over a quarter to +27% in a single week, and one agency found no rise at the median at all. There is no single number you can plan with. For why prices rise at all, see our article on rising click prices.

Sources: eCommerce Google Ads Benchmark, Lyonic, SmartSites. Different periods and groups, so the values are not directly comparable.

Lyonic adds a finding that points the other way. For Shopping and Performance Max, the fourth quarter was not more expensive than the summer at the median. According to Lyonic, Black Friday and the Christmas season push the click price up only on individual days.

These numbers contradict each other less than it looks. A rise over a whole quarter, a rise in one week and a rise on single days are different things, so do not read a weekly peak as a rise of the whole quarter. SmartSites' accounts are mostly US stores, while Channable's figures cover the EU and the EEA.

So what do you plan with? Your own curve. In Google Ads, look at the cost per click by week for last year's fourth quarter and set it against your summer. That is the one number that applies to you, and it is free.

Which break-even ROAS applies at the Black Friday price?

A higher one. The break-even ROAS is 1 divided by your margin. In this example, a 50% margin gives a break-even ROAS of 2.0. After a 25% discount, the same product has a margin of one third and a break-even ROAS of 3.0.

The calculation, step by step. A product sells for 100 and the goods cost 50. The gross margin is 50 of 100, which is 50%, and 1 divided by 0.5 is 2.0. At 2.0, every euro of ads must bring two euros of revenue to break even.

Now the sale. With 25% off, the price drops to 75, but the goods still cost 50. What is left is 25 of 75, a third. 1 divided by one third is 3.0. Now each euro of ads must bring three euros of revenue.

A ROAS target that fits the list price does not fit the sale price. If your campaign still aims at 2.0 during the sale, it can look successful while each sale loses money. SmartSites uses the same example in its Black Friday guide, and the arithmetic above is all there is to it.

Use your own margin and your own discount, per product group if discounts vary. Returns, shipping and payment fees can eat into the margin too, so your real break-even may be higher.

What does extra budget buy in invalid clicks?

In euros, more of them, if the share stays the same. In this example, a normal month has a budget of €10,000. In the fourth quarter, it is 47.9% higher, so €14,790. At 5.0% invalid clicks, that is €500 in a normal month and €739.50 in Q4.

The 5.0% is Lunio's average across all channels, from its retail report (status August 14, 2026): 414 million clicks from 88 retail accounts in monitor-only mode. Lunio sells click protection.

The limits of this example matter more than the example itself:

• It is a vendor's average, not a measurement of your account. Your account may look better or worse.
• Credits from Google, given when appropriate and possible, make the figure smaller.
• The share can be different in the fourth quarter. The example only keeps it equal to show the effect of the budget.

Why the share looks smaller in November, you can read in our Black Friday article.

What can you still do before Black Friday?

Black Friday is on November 27, 2026. Work through these steps in order.

1. Check your tracking first. If conversions or values are wrong, bidding strategies learn from false data.
2. Raise the budget in steps, not in one jump. Steps show how the account reacts.
3. Stop rebuilding the structure. SmartSites advises against restructuring before Black Friday. It also says a new Performance Max campaign needs weeks to settle, which is their assessment, so do not launch one now.
4. Recalculate your ROAS target for the sale price. Use the calculation above and set the target for the discounted products.
5. Write down your baseline for invalid clicks now. Note what the invalid clicks column and the credits show today, so you can compare later.
6. Record logs. Proof exists only from the day you start recording, and older days stay without proof. Keep IP addresses, devices and click IDs.
7. If you suspect a pattern, request a review. Google reviews the last 60 days. Details are in the section on review requests of our click price article. Google decides, and a credit is given only when appropriate and possible.

Google does not charge for invalid traffic it detects before billing. Later detections can appear as a credit under "Invalid activity" in your corrections. This is described on Google's help page on invalid traffic. According to that page, campaign reports are not adjusted retroactively for credits, so check your invoices too.

How does seacashback help you with this?

seacashback checks the clicks on your landing pages, excludes detected bots at account level and documents invalid clicks, so you can report them to Google. You see up front how much of your budget is affected.

It does not change the click price or your bid in the auction. It lets detected invalid clicks drop out, which dampens, on paper, what a real click costs you. With a bigger budget, that is worth more euros, but it is never a promise for your account. Read how it works under How it works. For data on invalid clicks in shops, see the Click Protection Report 2026, which measures German shops.