Finance Index
What is a virtual card payment in accounts payable and how does it work?
Reference guide to virtual card payments, including payment timing, method choices, control points, reconciliation, and vendor communication.
A virtual card payment generates a unique, single-use card number for a specific vendor payment, typically authorized for the exact invoice amount. The vendor processes it like any card transaction through their merchant terminal. The buyer gets strong controls and usually rebate income; the vendor gets fast funds but pays interchange fees of roughly 2 - 3%.
At a Glance
| Aspect | Short Answer | Why It Matters |
|---|---|---|
| A virtual card payment | A virtual card payment generates a unique, single-use card number for a specific vendor payment, typically authorized for the exact invoice amount. | Reduces payment errors, timing issues, and reconciliation cleanup. |
| Vendor impact | Interchange. | Keeps vendor records and payment decisions reliable. |
| Control point | The virtual card is issued with the authorization capped at the approved invoice amount (sometimes with a single-use and merchant restriction). | Keeps evidence clear and reduces control risk. |
| Related terms | A single-use virtual card is generated per payment; a ghost card is a standing card number assigned to a vendor or department for repeated use. | Reduces payment errors, timing issues, and reconciliation cleanup. |
| Virtual card vs ACH | Use virtual cards where vendors accept them (rebate income plus controls); use ACH everywhere else as the low-cost electronic default. | Keeps evidence clear and reduces control risk. |
Why do some vendors refuse virtual cards?
Interchange. Accepting your virtual card costs the vendor 2 - 3% of the payment in merchant fees, which on thin-margin invoices wipes out profit. Vendors most likely to accept are those already card-enabled, selling at healthy margins, or valuing faster payment over the fee. The realistic ceiling for card acceptance in a typical AP file is a minority of spend - meaningful, but never the whole file.
How do exact-amount authorization controls work?
The virtual card is issued with the authorization capped at the approved invoice amount (sometimes with a single-use and merchant restriction). A vendor attempting to process more than the authorized amount is declined, which prevents the over-charge problem that plagues cards on file.
What's the difference between a virtual card, a ghost card, and a single-use number?
A single-use virtual card is generated per payment; a ghost card is a standing card number assigned to a vendor or department for repeated use. Single-use numbers with exact-amount authorization are the safer AP pattern.
Virtual card vs ACH - when does each make sense?
Use virtual cards where vendors accept them (rebate income plus controls); use ACH everywhere else as the low-cost electronic default.
How do virtual card rebates work and who funds them?
Rebates are a share of the interchange fee the vendor's merchant processor collects - economically, the vendor funds the rebate through their acceptance cost.
How does a vendor actually accept and process a virtual card payment?
They receive the card number and remittance securely, key it into their merchant terminal or gateway (or receive straight-through processing), and funds settle like any card sale.
We sent a virtual card and the vendor never processed it - does it expire?
Yes, virtual cards carry expiration windows. Unprocessed cards should trigger follow-up and eventually cancellation and reissue via another method; track them as incomplete payments, not settled ones.
What interchange does the vendor pay, and is that why they refuse?
Typically 2 - 3% for card-not-present B2B transactions, and yes - fee sensitivity is the dominant reason for refusal.
How do I figure out which vendors will accept virtual cards?
Match your vendor file against card-acceptance data (your provider can run this), then confirm by outreach; vendors already accepting cards from other customers are your fastest wins.
What's a realistic virtual card acceptance rate?
Expect a minority of vendors by count - often concentrated in services, media, travel, and supplies categories - while large strategic and thin-margin vendors decline. Treat optimistic acceptance assumptions in sales proposals with skepticism.
What rebate rate should we expect on virtual card spend?
Rebates vary with volume, average transaction size, and program structure; evaluate offers by modeling your actual card-able spend rather than the headline rate, and pressure-test the acceptance assumptions behind any projected annual figure.
What is straight-through processing (STP) for virtual cards?
The card payment is pushed directly into the vendor's merchant account without manual key-entry - faster and less error-prone than emailing card details for the vendor to type.
Buyer-initiated vs supplier-initiated virtual card processing - which is safer?
Buyer-initiated (push/STP) is generally safer and more controlled: the buyer triggers settlement for the exact amount, rather than leaving a card number with the supplier to charge.
Is pushing vendors to virtual cards worth the relationship friction for the rebate?
Only with consent-based targeting: convert willing vendors, don't strong-arm strategic ones. Rebate income rarely outweighs price increases or damaged relationships from forced card acceptance.
A vendor processed our virtual card for more than the authorized amount - how?
Either the card wasn't issued with exact-amount controls, or the authorization allowed tolerance/multiple captures. Fix the issuance controls and dispute the overcharge through your card program.
Stampli perspective
Stampli supports virtual card as one of its unified payment methods, so card payments flow through the same payment approval workflow, pre-payment validation, and 1-to-1 ERP reconciliation as ACH and check - card economics without a parallel process to reconcile.