Opal vs Amex business cards for ad spend

Business Platinum carries an $895 annual fee and earns 5X Membership Rewards points on eligible flights and prepaid hotels booked through Amex Travel. It earns 2X on specified business categories and on eligible individual purchases of $5,000 or more, up to $2 million of qualifying purchases each calendar year. Other eligible purchases generally earn 1X.

Advertising is not a dedicated bonus category on this card.

A large monthly media budget does not necessarily arrive as one large charge. Meta, Google and other platforms may process several charges within a billing period. An individual advertising transaction that does not reach $5,000, and does not fall into another eligible 2X category, is not made eligible by the size of the monthly budget it belongs to.

American Express lets eligible Business Card Members create Virtual Cards with unique numbers and security codes, custom expiration dates and adjustable spending limits. There is no fee to create them and no limit on how many you create. Comparisons that say Amex has no virtual cards are out of date.

The difference is what sits around the card. On a general business card, virtual cards tend to be organized around vendors, projects, subscriptions and departments. Opal organizes them around clients, platforms and campaigns: one card for a client's Meta spend, another for their Google spend, another again for the next client.

That is not a feature gap, it is a workflow one. A card structure that mirrors how your advertising operation runs is what makes month end cheap, and one that does not is what makes it expensive. Opal categorizes transactions by client, platform and campaign before they reach QuickBooks, so attribution is structural rather than manual.

For agencies on Opal's client-funded model, client budgets fund the advertising workflow directly rather than the agency carrying campaign spend on its own operating capital. Outsmart Labs, a Miami digital agency, recovered 15 hours per week after moving to a per-client card structure on Opal.

Business Gold and Business Platinum both use a No Preset Spending Limit model. That is not unlimited spending. Amex says capacity adapts based on factors including purchase, payment and credit history, and for most businesses that flexibility works well.

High-volume advertisers have a different problem. An agency, an ecommerce brand or an in-house performance team may run $300,000 or $500,000 a month in media that has nothing to do with its own operating expenses. Opal sizes limits up to $10M on managed ad spend, cash flow and underwriting, so capacity scales with the advertising you manage rather than with the expenses you run.

Liability works differently too. The current Business Gold Card Member Agreement states that the Basic Card Member and the company are jointly and severally liable for all charges on the account, which means Amex may seek payment from either or both. On ordinary company spending that is unremarkable. On several hundred thousand dollars a month of somebody else's media it is a different question, and it gets asked when a client delays payment after the media has already run.

Opal requires no personal guarantee and no hard credit check. Eligibility is assessed on the spend you manage, not on the balance sheet behind it.

Above a certain volume the question stops being which card earns the most. Some high-spend Meta and Google advertisers are billed by invoice rather than by card, which takes the largest expense in the business out of every card rewards program at once.

Opal Ad Pay is built for that. It detects authorized advertising invoices, shows upcoming amounts and due dates in one place, and lets teams settle them with a card or Opal credit, extending the cash-flow window by up to 55 days. Payments on Opal credit carry a 3% processing fee, offset by the cashback earned on eligible spend. Payments on a connected card carry a 3.5% fee.

Explore Opal Ad Pay