You should pay Google directly because it keeps your ad budget and your agency's fee as two separate, visible numbers. When an agency bundles both into one invoice, you cannot see how much of your money actually reached the ad auction. That gap is where the markup hides.
I have reviewed a lot of Google Ads accounts over 16 years, and billing ownership is one of the first things I check. It takes five minutes and tells you plenty about how an agency works. This guide shows you what the markup trap is, how to check your own account, and what to ask before you sign anything.
What is the agency markup trap?
The agency markup trap is when a PPC agency collects your full ad budget, spends part of it on Google or Meta, and keeps the difference as extra profit on top of its stated management fee. You see one total. You cannot see the split.
This is sometimes called ad spend arbitrage. It works because most business owners never look inside the Google Ads account. They see the agency's invoice and assume the whole amount went into ads.
Many Luton and Bedfordshire agencies still hide their pricing until a discovery call, so this is a common blind spot. Plenty of local businesses have been burnt by agencies before, and opaque billing is often the reason.
How does the markup actually work?
Here is an illustration with made up numbers, not market data. You agree a £3,000 monthly ad budget, and the agency sends you a single invoice for £4,000. You have no way to know whether £3,000 or £2,600 reached Google.
The table below compares the three common billing models.
| Billing model | Who pays Google | Is the fee visible? | Main risk |
| Direct billing | You, on your own card or invoice | Yes, a separate agency fee | Very low |
| Agency billed, itemised | The agency, then re bills you at cost | Yes, if the invoice shows both lines | Medium: you rely on the agency's honesty |
| Agency billed, bundled | The agency | No, one total only | High: hidden markup and no proof of spend |
Direct billing is the only model where you can verify everything yourself.
Why should you pay Google directly?
Direct billing gives you proof of spend, full ownership of your account and a clear view of what you pay the agency. You can check every pound against Google's own records.
The main benefits are:
- Transparency: Google's billing records show exactly what was spent and when.
- Ownership: Your payment profile and account history stay with you if you change agency.
- Fairer incentives: A fixed fee does not grow just because your budget grows.
- Easier ROI tracking: You can compare true ad cost against revenue without guessing.
That last point matters. If a markup is buried in your spend, your real cost per acquisition (CPA) and return on ad spend (ROAS) are worse than your reports suggest.
How do you check who pays Google for your ads?
Log in to your Google Ads account and look at the billing section. If the payment profile belongs to your business, you pay Google directly. If it belongs to the agency, you do not.
Menu names change from time to time, so treat these steps as a guide:
- Sign in to Google Ads with your own login. If you cannot get in at all, that is your first red flag.
- Open the Billing section from the menu.
- Check Settings and find the payments profile linked to the account.
- Read the account holder name. It should be your registered business name, not the agency's.
- Open Documents and check whether invoices and statements are addressed to you.
- Check Access and security and confirm you are listed as an administrator.
- Compare the amount Google says was spent with the ad spend line on your agency invoice.
If step 7 shows a gap, ask the agency to explain it in writing.
Does a markup change my cost per click?
No, a markup does not change what Google charges per click. It changes how much of your budget reaches Google, which makes your effective cost per click look higher than it really is.
Many owners ask, "Why is my cost per click so high on Google Ads?" The ad auction sets the click price. Your bids, competition, ad relevance and landing page experience all play a part.
Before blaming Google, compare the cost per click shown inside the account with your total ad related invoice divided by clicks. If the second number is much higher, part of the difference may be markup.
Which fee structures should you look for instead?
A fixed monthly management fee, or a clearly stated percentage of ad spend, both work when paired with direct billing. The key is that the fee is written down and separate from the budget.
Percentage fees deserve a little care. When the agency earns more as your spend rises, its interests and yours can drift apart.
For context, the research on the UK market shows retainers commonly range from around £500 to £2,500 or more per month. Basic SEO packages start near £150, and comprehensive retainers reach £1,967 or more. Your PPC management fee should sit comfortably within a range like this, and it should be itemised.
Are there any exceptions?
Yes. Some agencies offer credit terms or consolidated invoicing for good reasons, such as cash flow support. The condition is that every charge is itemised and you can see the account itself.
If an agency bills you for ad spend, it should show:
- The exact amount spent on each platform
- The management fee as a separate line
- Read access to the Google Ads account at all times
- A clear statement that you own the account
Without these, the arrangement is a bundled one, and you should treat it with caution.
What should you ask a PPC agency before signing?
Ask five direct questions about billing, ownership and reporting. A good agency answers them plainly and in writing.
- Will I pay Google and Meta directly?
- Will I be the account owner and administrator?
- What is your management fee, and is it fixed or a percentage?
- Will my invoices show ad spend and your fee as separate lines?
- Can you report closed won revenue from my CRM, not only clicks?
That last question ties billing to results. To answer "How do I track leads from Google Ads?", your agency should connect campaign data to HubSpot or Salesforce, so you can see which spend produced revenue.
Frequently asked questions
Is it legal for an agency to mark up ad spend?
Marking up ad spend is not automatically illegal, and it is a common business model. The problem arises when it is not disclosed. Always check your Retainer Agreement for wording about ad spend, fees and account ownership.
Can I move my Google Ads account away from an agency?
Yes, if you own it. When your business holds the account and payment profile, you can remove the agency's access and keep your full campaign history.
Does paying Google directly work for Meta too?
Yes. The same principle applies. Your business should hold the ad account and payment method, and the agency should manage the account under your ownership.
Is direct billing more work for me?
Slightly. You add a payment method and review the monthly charge. In return you get proof of spend and freedom to switch agency without losing your data.
The bottom line
Pay Google directly, own your account, and insist that your agency's fee appears on its own line. Transparency is the simplest test of whether an agency is confident in its value.Google Business Profile also plays an important role as a ranking factor.
If you are a Luton business already working with an agency, run the seven checks above this week.