Why we only pay ads with a credit card, never a prepaid slip

When a new client joins our agency, one of the first conversations is about payment method inside the ad manager. And our house rule is firm: credit card only, never a prepaid bank slip. This piece explains why, looking at blocks, stuck balance, limit control and good billing practice.

How each option works

Prepaid slip (top-up)

You issue a slip, pay it, the amount enters as a balance in the account and the platform burns it as ads run. Sounds simple, but that is where the problem lives.

Credit card (postpaid)

You set a limit. The platform charges when the value is reached or at the end of the cycle. Money leaves your pocket only after media has been delivered.

Number one risk of prepaid: stuck balance

If the account is blocked for any reason (policy violation, "suspicious activity", ongoing review), the prepaid balance stays locked on the platform until the account is released. We have seen companies with four-digit amounts frozen for weeks. No predictability, no cash flow.

With a credit card, the worst case is a declined charge (no limit) or an account block mid-cycle: you owe what was already delivered, but you do not lose future balance.

Head-to-head

Limit management: the other side of the coin

Using a card takes discipline. If the limit is hit, Meta or Google decline the charge, and the account can be suspended for non-payment. Good practices we follow:

• Use a corporate card with limit sized for monthly media + 30% buffer.
• Check billing due dates before starting an ad cycle.
• Configure more than one payment method: primary card and backup card in the manager.
• Enable SMS or app alerts on any transaction above a defined floor.
• For high spend, request a temporary limit increase for the big campaign month.

Legal entity or individual?

Always the legal entity. Corporate card of the company that manages the media, matching the entity on the ad account. That eases accounting, proves the expense, avoids mixing personal and business, and reduces analysis risk from inconsistent patterns.

Is there a case where prepaid makes sense?

Few. Companies without a corporate card sized for the media sometimes need prepaid to start. In those cases we advise:

1. Issue a slip for the exact amount of the first test (do not park cash on the platform).
2. Get a corporate card in parallel, with matching limit.
3. Migrate to card by month 2, month 3 at the latest.

Good billing practice

If media is billed under the agency (rare model; preferred is always the client's entity on the ad manager), best practices are:

• Pass-through with invoice for the exact amount delivered.
• Monthly platform statement attached to the invoice.
• Zero hidden markup on media. Markup is for service, not investment.
• Client sees the ad manager in real time.

Our agency always operates with the client's entity and client's card. Media flows straight to the platforms. It is the healthy model.

Context: the link with blocks

Readers usually reach this piece after a scare. Prepaid and blocks are connected. Full prevention and recovery in ad account blocked: what to do.

Closing

Prepaid saves friction on day one and creates pain weeks later. A credit card demands financial discipline and returns predictability, cashback and speed. In more than 571 accelerated companies, the card is the standard. To set this up in your business, start with the free diagnosis.