Upgrade your ad spend from Slash to Opal

Slash publishes two card structures, and which one you are on changes the answer. The standard Slash Card is a charge card that settles at the end of each business day, and your available credit is the lower of your approved limit and the balance in your Slash account. Slash's own example: a $100,000 limit against a $150,000 balance still caps card spending at $100,000. Slash also publishes an Unsecured Commercial Charge Card Agreement for a second program, bounded by a credit limit rather than deposits and repaid monthly.

For a company spending its own money, that structure can work very well. Spending at scale on ads creates a different problem. When the card is backed by your balance, the card stops when the balance runs low, and a paused campaign is the way you find out. An agency, an ecommerce brand or an in-house performance team may run $500,000 a month in media without wanting $500,000 of its own working capital sitting behind card spend.

Opal is designed around that distinction. Eligible businesses can access credit limits up to $10 million, with limits determined using factors including managed ad spend, cash flow and underwriting. The Opal Card is paid in full monthly, and the capacity is sized against the advertising you run rather than the cash you park.

Slash's deposit-backed card turns cash you already hold into spending capacity, and its unsecured program is underwritten on your business. Opal underwrites the advertising you manage.

Which structure Slash offers you depends on what your business qualifies for, so confirm the credit limit and repayment terms directly with Slash.

On the headline rate, this one is close. Slash Free customers can earn up to 1.5% cashback on eligible card purchases and Pro customers up to 2%, with Pro currently starting at $25 a month. Slash markets that cashback as uncapped, though its rewards terms reserve the right to apply caps or other limits and to change rates, and qualified purchases exclude foreign-currency transactions, non-U.S. merchants and a list of restricted merchants.

Opal pays up to 2% on eligible ad spend, uncapped, with no annual cap and no monthly platform fee to unlock the higher rate. Slash's 2% sits on Pro at $25 a month, so at low volume that subscription eats into the reward before you earn it.

Both say 2%. What matters is what's funding the spend. On Slash's standard card, cashback is earned on money you already hold. Opal's is earned on credit sized against the advertising you manage, so you keep the working capital and the reward at the same time. At $500,000 a month of ad spend, up to 2% is up to $120,000 a year in cash, without $500,000 of your own money parked to unlock it.

Slash's cashback covers general business purchases. Opal's covers advertising, the line you need to fund, control and monetize.

Slash separates client spend through virtual bank sub-accounts. Slash Virtual Accounts let you create separate sub-accounts for individual clients or campaigns, each with its own balance, transaction history and account and routing numbers, and cards can be linked to a specific sub-account. Slash's help documentation says there is no limit on how many virtual cards you can create.

The structural difference is where the money sits. With Slash, client spend runs through a client virtual account and its balance before it reaches a Meta or Google card. With Opal, the agency creates dedicated cards by client, platform and campaign, drawing on ad-spend credit rather than a funded sub-account.

Every Opal card can be locked to one platform, given its own spend limit, and issued to a team member with its own permissions, and Opal enforces those limits automatically. New cards are created instantly, so a new client or campaign never waits on a card, and you see every transaction in real time. For agencies that work from pre-funded client budgets, Opal also supports the client-funded card model.

Slash can organize clients too. The choice is whether you want client ad spend sitting inside your bank or on dedicated ad-spend credit.

Slash has strong accounting infrastructure. It integrates with QuickBooks, Xero, NetSuite and others, and Virtual Accounts and card controls help organize transactions before they reach the books.

Opal is built around a narrower question, the one every advertiser asks at month end: which client, brand, platform and campaign does this transaction belong to? Dedicated cards create that structure before the transaction happens, and Opal syncs it to QuickBooks or Workday tagged by client, platform and campaign.

Instead of a shared card feeding transactions into a spreadsheet and then back to a client, the workflow runs client, then platform, then dedicated card, then transaction. That structure cuts the month-end work of matching Google, Meta and TikTok charges back to client budgets.

Both companies have built products for advertisers whose Meta spend has moved away from card billing. They solve it differently.

Slash's Meta Invoice Rewards Program can pay 1% cashback on eligible Meta payments made by qualifying ACH or wire transfer. The rate is flat, but how much monthly Meta spend earns it is tiered against your average qualifying Slash balance, running from $25,000 of eligible monthly spend at a $100,000 balance up to $4 million of eligible monthly spend at $16 million or more. It rewards paying Meta out of cash you already hold.

Opal Ad Pay takes a different approach. Instead of rewarding the bank transfer, Ad Pay lets eligible businesses fund supported Meta and Google invoices using Opal credit or a connected card. Opal can detect supported invoices, surface balances and due dates, and track payment status in one workflow. Payments using Opal credit currently carry a 3% processing fee, offset by the cashback earned on eligible spend. Payments made with a connected card currently carry a 3.5% fee.

The tradeoff is cash flow. Using Opal credit can extend the payment window by up to 55 days. Slash's 1% rewards paying Meta from cash you already hold, and how much of your Meta spend earns it depends on the balance you keep at Slash: $100,000 on deposit earns on the first $25,000 of monthly Meta spend. If preserving working capital or extending the payment window is the problem you are solving, Ad Pay lets you pay Meta on credit and keep the cash.