Credit Limit
A credit limit is the maximum amount a cardholder can have outstanding on a payment card before further transactions are declined or held for review. The issuer sets the limit during underwriting, using inputs such as revenue, time in business, financial statements, deposit balances, and the owner's personal credit. On accounts with many cards, the credit limit applies to the account as a whole, and individual card limits are allocated inside it.
Last updated: August 2026
Why credit limits matter
The number matters less than what it was calculated from, and for advertisers the inputs are usually wrong.
Traditional underwriting reads the business as a spender of its own money. It looks at revenue, assets, and the owner's credit file, then sets a limit proportional to those. An agency managing $500,000 a month in client budgets on $2M of annual revenue looks, to that model, like a small business asking for an implausible limit. The spend is recurring, low-risk, and directly tied to campaigns that generate the client's revenue, and none of that appears in the calculation.
Balance-backed models have the same problem from a different direction. A limit tied to deposits means growth requires the agency to park more of its own cash.
How credit limits are set
- Financial statement underwriting: revenue, profitability, time in business, personal credit.
- Balance-backed: spending capacity tied to funds held with the provider.
- Revenue-connected: limits derived from connected commerce accounts such as Shopify, Amazon, or PayPal.
- Managed spend underwriting: limits sized to the ad volume the business actually runs.
Business examples
A $75,000 limit from a traditional bank for an agency spending $300,000 a month. A balance-backed card requiring cash on deposit before capacity increases. A limit sized on managed ad spend and cash flow rather than on the balance sheet.
Frequently asked questions
Because most issuers size limits against the business's own financials rather than the budgets it manages. An agency spending client money looks small on paper regardless of how much volume moves through it.
On many traditional cards, yes. Opal does not require a hard credit check, and reviews business performance periodically to assess eligibility for credit adjustments, offering an increase where eligible.
A card with no fixed ceiling, where buying power adjusts with purchase, payment, and credit history. The American Express business cards work this way. It is flexible but not transparent, since the cardholder cannot see the ceiling in advance and cannot plan a large flight around it.
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