Agency paying client ad spend: how to stop the 30-to-60-day gap draining your cash

If your agency pays Google and Meta for client campaigns and the clients pay you 30 to 60 days later, you’re lending them money every month. Nobody agreed to that, it isn’t priced into your fee, and it grows with every client you win.

This guide shows how the gap forms, the changes that shrink it, and where borrowing sensibly fits for whatever is left.

Why does ad spend drain an agency’s cash?

Three clocks run at once, and they don’t line up.

1. The platform clock. Spend accrues daily and you’re charged on the platform’s rules.
2. Your invoice clock. You bill the client at month end, often with the media and your fee together.
3. The client’s clock. They pay on 30, 45 or 60 day terms, and some pay late.

Google’s help page on automatic payments says you’re charged when your account reaches its payment threshold or on the first day of the month, and that “you can be charged multiple times a month” if costs keep reaching the threshold. Charges can also come in slightly over the threshold when spend builds quickly. So a busy week for a client can mean several charges to your card or account before you’ve even raised the invoice.

Take a made-up example. An agency runs media for eight clients, with a combined month of spend that’s larger than its own monthly payroll. Clients are on 45-day terms. At any given time the agency has been billed by the platforms for roughly six weeks of client media that clients haven’t yet paid for. The agency is profitable. It’s also permanently out of pocket by a number bigger than its fee income.

That’s why growth makes it worse. Win two big accounts and the float doubles before the first of their invoices is due.

How big is your float? A two-minute check

Work out your media float:

• Add up what the platforms charged you for client media in the last 60 days.
• Subtract what clients have paid you toward that media in the same period.
• The difference is what you’re carrying.

Then check it against your lowest bank balance in the same period. If the float regularly exceeds your buffer, you’re relying on card limits, late supplier payments or delayed wages to bridge it. That’s the signal to act, before a client pays late and it turns into a crunch.

Which contract and billing changes shrink the gap?

Fix the terms first. Borrowing against a bad setup just makes the bad setup bigger. These changes cost nothing:

• Prepay the media. Ask for the media budget up front, or weekly in advance, and keep your management fee on normal terms. New clients and renewals are the easy places to introduce it.
• Split media from fees on the invoice. If a client pays your fee late, you can still chase it without confusing it with ad spend. Shorter terms on media, such as 7 to 14 days, are easier to defend because you’re passing on a third party’s cost.
• Cap spend without a top-up. Put a clause in the agreement that you’ll pause or throttle campaigns if the media invoice is overdue. Clients accept this when it’s in writing at the start.
• Invoice more often. Fortnightly or weekly media invoices shorten the float. Most accounting software can automate recurring invoices.
• Raise deposits for new clients. A starting deposit equal to a few weeks of media protects you in the riskiest stretch.
• Use the platforms’ own billing. If the client has their own account with you as a manager, they pay the platform directly and you carry no float at all. You lose some control over the billing relationship but eliminate the gap.

Large clients sometimes hold out for long terms. If you’re negotiating with a large corporate client, the Payment Times Reporting Scheme register shows how quickly big businesses report paying their small suppliers, so you can check before you accept long terms.

Can monthly invoicing from the platform help?

Possibly, for the biggest accounts. Google describes monthly invoicing as a payment setting “where Google provides you a line of credit for your advertising costs”. It’s not automatic. Google’s page says you may qualify if your business has been registered for at least a year and you meet a minimum amount of spend in 3 of the last 12 months, and spend on other accounts doesn’t count toward that. The page doesn’t state the number of days you then have to pay, which sits in your agreed terms, so read them before you count on it.

If you qualify, it can push the platform’s payment date out so it sits closer to when clients pay. It doesn’t remove the gap, and Meta and other platforms have their own rules, so check each platform’s billing help rather than assuming it works the same way.

Two cautions. First, a platform credit line is still credit: pay on time or you can lose the setting. Second, if you’re juggling several platforms, you’ll have several billing clocks to track. A single spreadsheet of due dates, updated weekly, is worth the effort.

Agent or principal: what about GST on the media?

It matters for how you invoice. If you buy media as an agent for the client, you’re passing on their cost and charging a management fee. If you buy as principal, you buy the media yourself and resell it. The ATO’s agent guidance turns on this relationship, and it affects what GST you charge and what you can claim.

This isn’t something to guess at. Ask your accountant to confirm which one you are under your current contracts and make the agreement say so in plain words. It will also help a lender, because the way you invoice media decides how your income looks in your bank statements.

When does borrowing make sense?

After the contract fixes, you’ll often still have some float: the weeks between a platform charge and a client’s payment, which you can’t remove entirely. That’s a working capital gap, and funding built for it is usually better than stretching a credit card.

• A business line of credit. You draw when a platform charge lands and repay when the client pays. Cost accrues on what you’ve drawn, so it suits a gap that rises and falls. See our page on business lines of credit online.
• Invoice finance. Useful if a few large invoices carry most of the float. Our invoice finance online page explains how it works.
• A short-term or unsecured loan. Can suit a one-off jump, such as taking on a big new account. See funding for ad spend and digital agency finance.

Borrowing doesn’t make sense if the real problem is a client who never pays or a fee that doesn’t cover your costs. Be honest about which problem you have first.

If you’d like a second opinion on which fits your numbers, you can check your options online in about a minute.

What will a lender look at?

Most online lenders read your recent bank statements, usually through a read-only bank statement link. For an agency, a few things help:

• Platform payments and client receipts that match up. A pattern of regular receipts from several clients reads as a steady business.
• Spread across clients. One client making up most of your receipts is a risk a lender will notice.
• Clean separation. If media and fees run through the same account as personal spending, the story gets muddy. Keep business money in business accounts.
• Up-to-date records. Accounting software that’s reconciled makes the conversation quicker.

You don’t need a perfect set of books to enquire, but the clearer the picture, the better the match.

Ready to stop financing your clients’ media?

Fronting ad spend is one of the more honest cash flow problems in the business: it comes from doing good work for growing clients. It’s also fixable, with better terms first and the right funding for whatever gap remains.

Want to know where your agency stands? See if you qualify with a short online enquiry. It’s about a minute of your time, and your credit file stays untouched because nothing is checked just for asking. Your details stay with one team rather than going out to a stack of lenders, so your phone won’t light up with calls from strangers. A real person reads your enquiry and rings you to work through the numbers.

One request: answer the form accurately, including real monthly revenue and time trading. That lets us line you up with the right fit on the first go.

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