Most of the online advice on this question is written by people who sell payment processing, so it answers "is it legal" in a paragraph and moves on to a sales pitch. For a contractor the legal answer is the smaller half. The larger half is a pricing decision: which way to recover a cost that shows up on every card payment, and which way costs the least goodwill.
This guide prices the options against one real-sized invoice, lays out the network caps and the state rules that apply to a trades business, and ends with when to skip all of it. It covers the cost of taking the payment and nothing else. If you came for net terms or late penalties, see what payment terms to put on an invoice and when to charge a late fee on an invoice. Markup on materials has its own guide: how much contractors should mark up materials.
What card processing costs you per job
You pay a percentage of every card sale, and the percentage depends on the card and on how the payment is taken. The number to work from is your effective rate: the total fees on your processor statement divided by the total card volume for the same month. Use that figure, not a rate someone quoted you before you signed up.
Example: at an effective rate of 2.9 percent, a $2,400 invoice paid by card costs you $69.60. If that job carried a 15 percent margin, your profit on it was $360, and the fee took nearly a fifth of it. On a $30,000 remodel at the same rate the fee is $870. The rate is an illustration, not a market figure, but the shape is real: contractor tickets are large, so a percentage that is invisible on a coffee is a line item on a job.
Surcharge, cash discount, or build it into the rate
There are three ways to recover the cost, and they are not equivalent.
A surcharge adds a fee to the invoice when the customer pays by credit card. It is the only one of the three with card network caps, it carries most of the state rules, and it is the one most likely to start an argument when the card comes out. Under the rules of both major networks it applies to credit cards only, never to debit or prepaid cards.
A cash or check discount works from the other end. The posted price is the card price, and a customer who pays by check or bank transfer pays less. The money moved is the same. The federal Durbin provision protects it, and several state statutes say outright that a discount is not a surcharge.
Building it into the rate means you quote the price that leaves you whole after the fee and tell no one. There is nothing to disclose and nothing to cap. Every customer, including the ones paying by check, covers a share of the cost.
In short, a surcharge is the most paperwork for the same money a discount moves. On small-ticket work, building the cost in is simpler than either.
Where surcharging is capped or restricted
Two layers apply, and they are separate. The first is the card networks' own rules, which are contract terms between you, your processor, and the network. The second is state law, which the networks say they do not override.
The network caps
Visa's merchant Q&A tells merchants to limit the surcharge to their merchant discount rate for the card or 3 percent, whichever is lower, bars surcharges on debit and prepaid cards, requires the surcharge to appear as a separate charge on the receipt, and requires you to notify your acquirer at least 30 days before you start. Mastercard's rules page caps a brand-level surcharge at the lesser of your average effective merchant discount rate or a Maximum Surcharge Cap that the page states as 4 percent. It also bars surcharges on debit and prepaid Mastercard, requires the dollar amount of the surcharge on the receipt, and asks for 30 days' notice to both Mastercard and your acquirer.
If you surcharge both brands at one rate, the working rule is simple: no more than your actual cost, and never above 3 percent. The 4 percent figure you see printed as a nationwide cap is Mastercard's own ceiling, not Visa's, and both networks say their rules do not override what your state allows.
These rules may change. A proposed settlement of the merchants' antitrust case against Visa and Mastercard would let merchants surcharge by card type, generally capped at the lesser of 3 percent or your cost of accepting the card. The court gave it preliminary approval in June 2026 and set the final approval hearing for November 16, 2026. Until it is final and the networks rewrite their rules, the caps above are the ones that apply.
How six states handle it
State law is the part that changes, so treat this as a sample of how different the rules are, not a map. Check your own state before you add a fee.
Connecticut. Section 42-133ff says "No person may impose a surcharge on any transaction." It allows a discount for paying by cash, check, or debit if you post a notice of it: on the premises, online before checkout, or out loud on a phone sale. A contractor there should use the discount route.
Massachusetts. The statute bars a seller from imposing a surcharge on a customer who chooses to pay by credit card instead of cash or check, and it allows a cash or check discount. The discount route is the only one open here too.
California. Civil Code section 1748.1 bars card surcharges and permits discounts for cash, check, or debit. The Attorney General's own page says a federal court held the law unenforceable as to the businesses in Italian Colors v. Becerra and that the office "will generally apply" that decision to similarly situated merchants, while merchants remain barred from misleading customers about price. The practical reading is that the ban is on the books and not enforced against an ordinary merchant who discloses, but you should not build a business on a statute that a court has narrowed and a regulator has only described as a general practice.
Colorado. A 2021 law, effective July 1, 2022, replaced the old ban. A surcharge is allowed under one of two options, and the merchant picks one: up to 2 percent of the total cost to the buyer, or up to the merchant discount fee the merchant actually pays. Each option comes with its own required notice wording, posted on the premises or shown before an online checkout. The surcharge has to appear as its own line on the receipt, and none is allowed on cash, check, debit, or gift card payments.
Minnesota. A surcharge may not exceed 5 percent of the purchase price. On an in-person sale the customer has to be told out loud at the time of sale and a sign has to be conspicuously posted. Online sales need a notice during checkout, and phone sales need the same spoken notice. A discount for cash or check offered to all customers and clearly disclosed is not a surcharge. A violation carries a civil penalty of up to $500 and a refund of the surcharge to each buyer.
New York. A seller that surcharges must clearly post the total price for using a credit card, inclusive of the surcharge. The surcharge may not exceed what the card charge costs the business, and the statute expressly allows a two-tier pricing system.
Visa's own Q&A, dated February 2024, lists Connecticut, Maine, Massachusetts, Oklahoma, and Puerto Rico as places that prohibit surcharging. Oklahoma has since dropped its ban. Since November 1, 2025, a surcharge there may not exceed 2 percent of the transaction or your actual processing cost, whichever is less. The notice has to be posted at the entrance and at the point of sale, on the home page and checkout page for online sales, and read out on phone sales. Other states have their own statutes, and several have a history of litigation. If yours is not named here, read it on the state's official site or ask your processor which rules they enforce.
Disclosure: the fee goes on the quote, not at the door
Every route that involves a visible fee has a disclosure rule, and they all point the same way. Visa requires disclosure at the point of entry and at the point of sale. Mastercard requires disclosure at the point of interaction that includes the surcharge amount. New York requires the total card price to be posted. Minnesota requires the customer to be told out loud on an in-person or phone sale.
For a quote-based trade, the time of sale is when the customer accepts the quote. That is the safe place to disclose, and it is also the place where the conversation costs you nothing. A fee announced when the card comes out reads as a trick even if it is legal. The same fee printed as a line on the quote reads as policy.
Put three things in writing. On the quote, a line that says card payments carry a processing fee of a stated percentage and that payment by check or bank transfer does not. On the invoice, the fee as its own line with the dollar amount, because both networks require the amount on the receipt. At the point of payment, the same sentence again, so the customer chooses a method knowing the price of each.
One more rule applies in California. The Attorney General's guidance on hidden fees says a credit card processing fee is not a mandatory fee if the customer can avoid it by paying a different way. If a business accepts only credit cards, the fee is mandatory and has to be included in the advertised price. A contractor who takes cards only should fold the cost into the price and skip the line.
The cash and check discount most operators should run instead
The federal provision at 15 U.S.C. 1693o-2(b)(2) says a payment card network may not stop a merchant from offering a discount or in-kind incentive for payment by cash, check, debit, or credit. A discount for paying by debit or credit card may not differentiate on the basis of the issuer or the network. And to the extent federal and state law require it, any discount has to be offered to all prospective buyers and disclosed clearly and conspicuously.
That provision constrains the networks, not the states, so it is not the whole answer. But the state statutes above line up behind it. Connecticut and Massachusetts both ban the surcharge and allow the discount. Minnesota's statute excludes a clearly disclosed cash or check discount from the definition of a surcharge. California's Attorney General says the law permits discounts for cash, check, or debit.
The practical difference is how it reads to the customer. A surcharge is a penalty added to a number they already agreed to. A discount is a reward for a choice, applied to a card price that was on the quote from the start. If you post both numbers on the quote, the customer who pays by check feels like they got a deal, and the customer who pays by card pays what the quote said.
Keep the discount the same for every customer and put it on every quote. If you ever extend it to debit or credit cards, the federal condition adds a rule: the discount cannot depend on which bank issued the card or which network it runs on.
Worked example: one $2,400 invoice, four ways
Example: you want to keep $2,400 on a job. Your effective card rate is 2.9 percent, an illustrative figure. Here is what each route does.
| Route | Customer pays by card | Card fee | You keep |
|---|---|---|---|
| Absorb it | $2,400.00 | $69.60 | $2,330.40 |
| Surcharge 2.9% | $2,469.60 | $71.62 | $2,397.98 |
| Built into the rate | $2,471.68 | $71.68 | $2,400.00 |
| Card price $2,471.68, check price $2,400.00 | $2,471.68 by card, $2,400.00 by check | $71.68 on cards, $0 on checks | $2,400.00 either way |
Absorbing the fee costs you $69.60 on this job. The surcharge nearly makes you whole, but it leaves you $2.02 short, because the fee is also charged on the surcharge itself. It also puts a fee on top of a total the customer already agreed to, even when the quote warned them. Building the cost into the rate or posting a lower check price gets you to the same $2,400, and the customer who pays by card pays within a few dollars of the surcharge total either way.
The money is the same. What changes is the word on the page and the day the customer first reads it. The surcharge is the route with the caps and the state-by-state disclosure. The discount is the route with a sentence on the quote.
When to just absorb it
Absorbing the fee makes sense when the ticket is small enough that the fee is a rounding error against the goodwill, or when the customer is a repeat account whose next ten jobs matter more than this one. It also makes sense when you cannot say the fee out loud at the time of sale without the conversation getting harder than the job.
The reverse is where the decision gets expensive. Large tickets and thin-margin work are where a percentage turns into real money. On those, take the deposit by check or bank transfer where the customer will, post the check price, and keep card for the balance. How to ask a customer for a deposit covers where that first payment fits.
Put the payment choice on the quote
The cleanest place to handle a card fee is the quote, before the customer has agreed to anything. Build the quote at your card price in EosLog's free quote generator and write the check price in the notes, which print on the PDF. The customer sees what each payment method costs before they say yes.
No account required. You can also create a free EosLog account to save your line items and reuse them on every quote, or see the plans first.
Sources and further reading
- Cornell Legal Information Institute, 15 U.S.C. 1693o-2 (the discount-for-cash provision and its conditions).
- Visa, U.S. Merchant Surcharge Q&A (cap at the lower of merchant discount rate or 3 percent; credit only; receipt and notice requirements; the states that prohibit surcharging as of February 15, 2024).
- Mastercard, Merchant surcharge rules (brand-level cap, 4 percent Maximum Surcharge Cap, notice and receipt requirements).
- U.S. District Court for the Eastern District of New York, Interchange Rule 23(b)(2) Equitable Relief Settlement (official settlement site: preliminary approval in June 2026, final approval hearing November 16, 2026).
- California Attorney General, Credit Card Surcharges (Civil Code 1748.1 and Italian Colors v. Becerra, 878 F.3d 1165, 9th Cir. 2018), and the hidden fees FAQ (when a card processing fee is a mandatory fee).
- Colorado General Assembly, SB21-091 (surcharge allowed under one of two options, up to 2 percent or up to the merchant discount fee; effective July 1, 2022).
- Minnesota Office of the Revisor of Statutes, Minn. Stat. 325G.051 (oral notice, posted sign, 5 percent cap, cash discount excluded, civil penalty).
- New York State Senate, General Business Law 518 (posting the total card price; surcharge may not exceed the business's cost; two-tier pricing allowed).
- Connecticut General Assembly, Chapter 739, section 42-133ff (no surcharge on any transaction; a posted discount for cash, check, or debit is allowed).
- Massachusetts Legislature, M.G.L. c. 140D, section 28A (no surcharge on a cardholder who pays by credit card; cash or check discount allowed).
- Oklahoma Legislature, Enrolled Senate Bill 677 and its bill history (repeals the surcharge ban in 14A O.S. 2-417; cap at the lesser of 2 percent or actual processing cost; notice rules; became law May 28, 2025, effective November 1, 2025).
This article is general information, not legal advice. Surcharge and discount rules differ by state, change often, and are the subject of ongoing litigation, and the card networks update their own rules. Confirm the rules for your state with your state attorney general or a licensed attorney, and confirm your network obligations with your payment processor, before adding a fee. The 2.9 percent rate and dollar figures are illustrative examples.