What Is a P-Card (Purchasing Card)?

How a p-card works

P-cards take small, routine purchases out of the purchase order process. Writing a PO, getting it approved and cutting a check for a $90 box of fittings can cost more in staff time than the fittings. With a p-card, a trusted employee buys within set rules and the paperwork happens afterward. The cards go to the people who buy most often: maintenance techs, field supervisors, office managers.

A p-card program has four roles. The issuer is the bank that provides the cards and sends the bill. A program administrator sets up cards and limits with the issuer. Cardholders make the purchases. Approvers, often the cardholder's supervisor, review each statement.

The federal government's GSA SmartPay program publishes its card rules, and they make a good model for company policy. GSA runs separate business lines for purchase, travel and fleet spending, plus an integrated account that combines them. Its purchase accounts are centrally billed (the agency gets one bill and pays it), and the government is liable for authorized charges. On a true company p-card, the company should be liable too, so check your issuer agreement.

P-card controls: limits and blocked merchants

Controls work at the register: a purchase that breaks a rule gets declined.

Transaction and monthly limits

A single purchase limit caps any one transaction. A monthly limit caps the cardholder's total for the cycle, and it has to be at least as high as the single purchase limit.

Merchant category code blocks

Every merchant that takes cards is assigned a merchant category code (MCC), a four-digit number that identifies its type of business, such as gas stations, restaurants or airlines. GSA's purchase card training notes that MCCs may be blocked to prevent fraud and misuse. A tech's card might allow hardware stores, plumbing supply and appliance dealers, and block bars, casinos and cash withdrawals.

The split purchase rule

Limits only work if nobody cuts a big purchase into small ones. The same GSA training puts it bluntly: "it is never permissible to intentionally divide purchases into parts just to get under your limits." Write that rule into your own policy. Split purchases are easy to spot later: two charges at the same store, minutes apart, adding up to just over the limit.

P-card vs travel card vs credit card

A p-card is one kind of corporate card. People mostly confuse it with the corporate travel card and with an ordinary credit card. The difference is the job each does and who is on the hook.

GSA's program draws the line clearly: most of its travel cards are individually billed accounts, where liability rests with the individual cardholder. Private travel card programs vary more, so check whose name is on the liability line. Our definition of a corporate card covers the wider category.

How p-card reconciliation works

Reconciliation means checking every charge against a receipt, confirming it was a business purchase, and coding it before the books close. GSA tells its cardholders to review and reconcile each statement within their agency's timeframe, usually three to five days. A typical monthly cycle at a small company:

1. The statement closes, and each cardholder gets a list of their charges.
2. The cardholder attaches a receipt to every line and flags anything they don't recognize.
3. Each charge is coded to a GL account (the general ledger category, such as Repairs or Materials), plus the job, property or cost center.
4. The approver reviews the statement and signs off.
5. Finance posts the coded charges and pays the issuer.

Disputes run on a clock. GSA gives its cardholders 90 calendar days from the transaction date to start one, and after that they lose the right to recover the money. Your issuer's deadline may differ. Our guide to credit card reconciliation covers the matching side in more detail.

A worked example with one month on a p-card

Maple Street Properties manages 40 units and gives p-cards to its three maintenance techs. Each card has a $1,500 single purchase limit, a $5,000 monthly limit, and blocks on restaurants, bars, gas stations and cash withdrawals. Fuel goes on a separate fleet card.

Here is one tech's October:

The total is $286.40 + $1,140.00 + $412.75 + $96.30 + $203.55 = $2,139.00, well under the $5,000 monthly limit. Every line has a receipt and a unit or property code, so approval takes minutes.

On October 16, the card declined a $1,890 water heater because it was over the $1,500 single purchase limit. Ringing it up as two $945 charges would be a split purchase. Ask the administrator for a one-time limit increase instead, or pay that invoice through accounts payable.

Across all three cards, Maple Street spends about $9,000 a month, or $108,000 a year. At a hypothetical 1% rebate, the issuer would pay back $1,080. For scale, agencies earned $471 million in refunds on $39.4 billion of total GSA SmartPay spend in fiscal year 2025, about 1.2 cents per dollar. A 40-unit property manager won't get federal pricing. But GSA's refunds depend on the dollar volume of transactions and the speed of payment, so ask your issuer how much each of those moves your rate.

Common p-card mistakes

The first problem is a shared card. One card passed around the shop means nobody knows who bought what. Issue cards to named people, and cancel a card the day its holder leaves.

Limits get set once and forgotten. Review them once a year, and look at declines: a card that keeps getting declined at the same supplier needs a different limit, not a workaround.

Receipts get chased at month-end. A receipt requested four weeks later is often gone. Ask for it at the time of purchase, while the cardholder still has it and remembers which unit or job it was for.

Approvers sign without reading. Spot-check a few lines each month, and look for split purchases and merchants that don't fit the job.

When a government agency pays you by card

If you sell to federal agencies, know the micro-purchase threshold: the dollar ceiling for the simplest federal buys. Since October 1, 2025, the Federal Acquisition Regulation has set it at $15,000 for most purchases, $2,000 for construction covered by federal wage rate rules and $2,500 for services covered by the Service Contract Labor Standards.

Under that ceiling, an agency buyer can choose, order and pay with a purchase card in one step, and GSA calls its purchase program the preferred way to pay. So expect orders under the threshold for your type of work to be paid by card.

Managing p-card spend day to day

Limits and MCC blocks belong to your card program and are set with the issuer. The work that piles up comes after the swipe: chasing receipts, coding charges and getting statements approved.

Clyr does not issue cards. It works with the cards you already have, including Amex, Visa and Mastercard, instead of replacing them. When a charge comes through, the cardholder gets a text and replies with a photo of the receipt. Coding rules fill in the GL account, property, job or cost code, and the expense syncs to your accounting platform. Approvals in Clyr happen after the purchase, so keep your issuer's limits and blocks in place to stop a charge before it happens.

FAQs