Supplier card fees depend on the governing state's surcharge definition, cap or ban; printed payment slips have separate limits. A card fee on a supplier invoice may be unlawful in one state, capped in another, and treated differently from one jurisdiction to the next. The same invoice can also come with a payment slip that displays more card data than the law allows. Owners and estimators who carry these figures into a bid need to know which charges belong in the material price and which do not. It does not cover every state, and it does not address sales tax, freight, or contract terms. The four steps below follow the order you would ask the questions when a bill arrives.
1. Decide whether the charge is a surcharge at all
Start with what the charge does to the price, not with what the supplier calls it. Invoices use labels such as processing fee, convenience fee, service charge, or card handling. The label does not settle the question. These charges can show up in three places: a separate line on the invoice, a percentage added to the total, or a higher unit price on a quote that shows no fee line at all. The third is the easiest to miss, and the Maine definition quoted below is written to catch it.
A practical way to test the definitions is to pull the quote, the invoice, and the supplier's terms of sale together. Ask whether a cash or check price is posted anywhere the buyer can see it, whether the price changes only when a card is used, and whether the difference is described as a fee, a discount, or simply a price. The answers do not settle the legal question by themselves, but they show which definition the bill most closely resembles.
Minnesota defines the term in plain language. Under Minnesota Statutes section 325G.051, a surcharge is "a fee or charge imposed by a seller or lessor upon a customer that increases the price of goods or services to the customer because the customer uses a credit or charge card to purchase or lease the goods or services." Two parts of that definition do most of the work on a supplier bill. The seller must impose the charge, and the charge must raise the price because the buyer paid by card. A line that appears only when the buyer pays by card meets both parts, whatever the line is called. A charge that appears on every invoice, whether the buyer pays by card or not, does not meet the second part, because it does not rise because of the card.
Maine uses a wider definition. Under Maine's Title 9-A, section 8-509, a surcharge means "any means of increasing the regular price to a cardholder that is not imposed on a customer paying by cash, check or similar means." That wording does not need a separate line item. A higher price for card buyers that cash or check buyers do not pay falls under the definition, even if the bill never uses the word surcharge. For a bid, the practical comparison is between the price a card buyer pays and the price a cash or check buyer pays for the same goods.
The definitions also carve out discounts, and this is where bills get misread. Maine's statute is direct: "A discount or reduction from the regular price is not a surcharge." Minnesota's approach is more conditional. Its definition excludes a discount for a buyer who pays by cash, check, or similar means, but only if the discount is offered to all prospective customers and its availability is clearly and conspicuously disclosed to all of them. A cash price offered only to some buyers, or disclosed only on the invoice, does not fit the Minnesota exclusion.
When a supplier's terms show two prices, identify which one the supplier calls the regular price. The question you are answering is whether the difference between the two is a discount from that regular price or an increase imposed on card buyers. The answer helps identify the charge before the fee is discussed with the customer or built into the estimate.
Once the charge is identified, show it on the bid as its own item rather than burying it in a unit price. A visible line lets the owner see the card-driven amount, decide whether to absorb it, and ask the supplier about it before the number reaches the customer.
2. Test any surcharge against the cap and the own-card rule
Minnesota does not leave surcharges unlimited, and it does not treat every card-related charge the same way. Its statute says the surcharge "does not exceed five percent of the purchase price." That is a ceiling on the fee, measured against the purchase price. Because the ceiling is a percentage, a fee that looks small in dollars can still be over it, and a fee that looks large can be under it. Read the fee against the purchase price, not against the total of the job or the size of the order.
Minnesota also bars one kind of surcharge completely. A seller or lessor that "establishes and is responsible for the seller or lessor's own customer credit or charge card" may not impose a surcharge on a customer who elects to use that card "in lieu of payment by cash, check, or similar means." The rule turns on who established and is responsible for the card, not on what the card is called. A card a supplier issues under its own program is the case the statute addresses directly. For another card, establish whether the supplier is responsible for it before deciding which restriction applies.
Ask the supplier directly which card the fee applies to. A supplier that cannot say whether the card is its own, or that adds the fee to every card transaction regardless of the card used, has given the estimator a reason to look more closely at the rest of the invoice.
The steps below show how to run the Minnesota test on one supplier invoice.
- Find the card line and the purchase price printed on the same invoice. The statute measures the fee against the purchase price; the invoice's purchase-price line is the practical figure to use.
- Identify the card the buyer used and whether the supplier established and is responsible for it.
- If the card belongs to a third party, compare the fee with the statutory ceiling using the purchase price.
- If the seller broke the section, it is "subject to a civil penalty of not more than $500 and shall refund the surcharge to each buyer." The refund goes to the buyer, so the fee should not be carried into the bid as a settled cost.
Raise the question with the supplier before the job is priced.
The steps assume the invoice shows the purchase price separately from the fee. When it does not, the price has to come from the supplier before the cap can be tested. A bid built on the total alone cannot show that the fee passed the ceiling, because the total hides the one number that the ceiling measures.
3. Check whether your state bans card surcharges outright
Some states forbid surcharges for certain cards instead of capping them. Florida is one of them. Under Florida Statutes section 501.0117, a seller "may not impose a surcharge on the buyer or lessee for electing to use a credit card in lieu of payment by cash, check, or similar means, if the seller or lessor accepts payment by credit card." Read the wording closely. The ban covers credit cards only, and it applies only when the seller accepts credit cards. A Florida seller that takes no credit cards is outside this quoted rule.
The statute also says what happens to someone who breaks the rule: a person who violates it "is guilty of a misdemeanor of the second degree." That is a criminal penalty. An estimator reviewing a Florida bill should therefore treat the fee as a compliance question for the supplier, not only as a pricing question.
Maine's rule reaches more cards. Under Maine's section 8-509, a seller in a sales transaction "may not impose a surcharge on a cardholder who elects to use a credit card or debit card in lieu of payment by cash, check or similar means." Two differences from the Florida text stand out. The Maine wording covers debit cards as well as credit cards, and it contains no condition about whether the seller accepts credit cards. The Florida test therefore does not carry over to Maine.
An estimator should identify the governing state before applying any rule from this post, and should not assume that a rule in one state settles the question for a job in another.
Whether a particular fee is lawful can turn on where the sale took place and how the price was posted to buyers. Before a disputed fee goes into a bid, a claim, or a refund request, have a lawyer licensed in the relevant state review it.
4. Check what the card payment slip shows
A fee that passes the first three tests still needs a payment slip that the job file can support. Washington sets limits on what a card payment slip can display. Under RCW 19.200.010, a business accepting credit or debit cards may print no more than the last five digits of the card account number on the payment slip and may not print the card expiration date. The rule is about what appears on the payment slip, not about whether the fee is allowed, so a lawful charge can still come with a payment slip that breaks it.
The Washington section also limits its own reach. It applies only to electronically printed payment slips and excludes transactions where the card number is recorded solely by handwriting or by a physical impression or copy of the card. That distinction changes what an estimator should look for. Check the printing method first.
For a supplier bill, the payment-slip test is short. Look at the card payment slip that goes with the invoice. Check its printing method and displayed card details against the Washington limits where that section applies. The payment slip should also match the card transaction on the invoice, with the same date, amount, and card, so the fee can be traced to a single payment. On a bill that shows a card fee, the payment slip helps tie that fee to a specific card payment in the job file. Ask the supplier for supporting payment records if the fee cannot be matched to a transaction.
When a payment slip fails the Washington test, the fee is still a question for the invoice, not an automatic finding. The payment-slip rule restricts what the printed slip shows; it does not say what the price should be. An estimator who finds a non-compliant payment slip should raise it with the supplier as a documentation problem, and should not reprice the material on that basis alone.
Keep the payment slip with the invoice in the job file, so the card charge, any fee, and the payment slip can be matched when the bill is reviewed.