A client asks you to just use their card. It sounds like a favor, maybe even a kindness. Skip the processing fee, save everyone a little money, keep the relationship easy.
Then the request gets specific. Take their card, place the order directly with your vendor, then bill them separately for your markup. On the surface, it looks like a shortcut. Underneath, it is a tangle of trade agreements, resale certificates, sales tax exposure, and fraud liability that most designers have never had to explain out loud.
That is the exact situation one member brought to the Interior Design Community recently. A client placing a large first-floor furnishings order wanted a workaround to the credit card processing fee, and the designer needed language that held the boundary without sounding like just another no.
The “no” itself is easy. Explaining why, in a way that protects the relationship and the business, is the harder part.
This particular ask tends to show up once a designer starts booking larger furnishings packages, the kind where a credit card processing fee on a five- or six-figure order is not a small number anymore. Clients notice that number, and a reasonable one will ask if there is a way around it. The workaround they propose usually is not malicious. It is just untested against how trade purchasing actually works.
Why vendors already answered this question for you
Most trade vendors do not give designers a choice here. Purchases run through the designer’s account, tied to the designer’s resale certificate and payment terms, full stop. A client’s personal card was never part of that arrangement, no matter how the client wants to structure the payment.
@studio_dean_ put it plainly:
“Our trade vendors require the use of the company card on file with our account to process purchases and dont allow the use of client cards. This is standard for the large majority of vendors we use.”
@studio_dean_
This is not the designer being difficult. It is the vendor being clear, which is exactly why setting up trade vendor accounts the right way from the start keeps this kind of policy from ever becoming a surprise mid-project.
When designers reframe a client’s request this way, it’s not my policy, it’s my vendor’s policy, the conversation moves out of a negotiation and into a fact. That reframe also helps with scope control. It draws a hard line around who touches a purchase order and who does not, a line that matters even more once a project scales past a few line items into full rooms of furnishings.
What this workaround actually costs
The sales tax math nobody wants to do
Processing fees are the visible cost. The real cost shows up somewhere else entirely, in sales tax liability. Designers who buy through a resale certificate, then mark the item up and rebill the client, are responsible for tax on the full retail price, not just their markup. Route the purchase through the client’s card instead, and that math falls apart, because the invoice no longer matches who actually bought what.
@janagrayinteriors walked through the numbers:
“Its an accounting and sales tax nightmare. If you buy an item from a trade source using your retail certificate for $500 and then add $500 as a markup (using round numbers here for the example), then the clients (and your) sales tax liability is on the entire $1000 ($100 assuming 10% sales tax). Quickbooks automatically calculates this for you based on your paid invoices. If you are not invoicing the client for 1/2 of the total sale, you are still liable for the tax from the sale and would have to figure this out and somehow invoice correctly for the taxes and hope the state doesnt audit you. And what if the client did a chargeback on a charge that was through your trade account?”
@janagrayinteriors
Educational content, not legal advice. But the pattern holds even without a lawyer in the room: once a client’s card enters a trade transaction, the paperwork stops matching reality, and the designer is the one left to explain the mismatch to a state auditor, not the client.
The liability nobody sees until it is too late
Tax exposure is a paperwork problem. Fraud exposure is a relationship problem, and it tends to surface later, when it is much harder to unwind.
@studiokcinteriors shared what happens when this setup goes wrong:
“I worked for a designer at one point who would put charges directly on client’s cards. It’s all fun and games until a year later a vendor kept that client A’s card on file and you think they’re charging client B. And now client A is coming to you with fraudulent charges and you’re in the middle trying to get things uncharged and recharged and don’t have access to anyone’s CC statements. A great little anecdote I use as to why you shouldn’t charge direct to clients… Regardless, no other business operates that way, it’s unprofessional, and even a bunch of our vendors charge CC fees anyhow, so I don’t know why clients think it’s ok to push us around on that stuff.”
@studiokcinteriors
A card left on file with a vendor does not remain attached to a single project. Once it is there, it can get charged again, misapplied to another client’s order, or disputed months later, with the designer stuck in the middle of a dispute they have no records to resolve. That is the risk a processing fee discount is not worth taking on.
Two ways to handle credit card processing fees that actually work
Once the “no” is settled, the real conversation is about the fee itself. Designers who navigate this well tend to land on one of two approaches, and both are legitimate business decisions rather than compromises.
The first is to disclose the fee and pass it along, which is what the original poster already does. The second is to build the cost into pricing so the client never sees it as a separate line item.
@180spaces makes the case for the second approach:
“I build in enough margin on every furnishing piece to cover merchant fees because clients want the convenience, their rewards, etc that comes with using their CC. I also want an elevated, client experience and to avoid annoying them with pesky add-on fees or give them an underlying sense that Im nickel & dime-ing them. There is data out there somewhere that buyers actually spend more and have less objections when they have a cc payment option. Why not build it in your margins? I dont know about you, but Im usually internally annoyed when I go into a store and they have signs stating they add % to take a cc. Merchant fees to retailers have ALWAYS been there, and Ive always thought of it as a cost of doing business.”
@180spaces
Neither approach is wrong. Disclosing the fee keeps pricing transparent and shifts the cost to the client who is choosing the convenience. Building it into the margin keeps the client experience frictionless and treats the fee like any other overhead, quietly, before the number ever reaches an invoice- the same logic behind building overhead costs into project pricing instead of passing every expense through as its own line item.
The choice comes down to business model and client base, not which option is more correct. A designer doing high-volume, lower-ticket residential work may find disclosure keeps pricing honest and easy to explain. A designer doing fewer, larger full-service projects may find that folding the fee into a margin that already accounts for freight, receiving, and project management makes for a smoother client conversation overall. Either way, the decision should be made once in advance and applied consistently, rather than negotiated project by project.
How to structure billing so a client’s card never touches your vendor account
The cleanest fix is not a script, it is a workflow. Several members solve the underlying problem before it ever becomes a conversation about card fees, by changing how the invoice is built in the first place.
@bridgetrayinteriordesign described the version that removes the ambiguity entirely:
“I only pay vendors using my bank/card. I first invoice client for TOTAL amount including tax. They pay my invoice then I order using my accounting.”
@bridgetrayinteriordesign
This sequencing matters. The client’s payment and the vendor’s payment never touch the same transaction, which closes off the tax mismatch, the resale certificate problem, and the fraud exposure all at once. It also gives the designer a clean paper trail if a client ever disputes a charge, since the client paid the designer’s invoice rather than a specific vendor’s purchase.
For the credit card conversation specifically, a script that has worked for other members: “I’m not able to run your card through our vendor accounts. Our trade agreements require purchases to go through our business account and to be accompanied by a resale certificate. What I can do is invoice you directly, and you’re welcome to pay that invoice by card with the processing fee applied, or by check or transfer with no added fee.” That script lands best when it echoes language the client already agreed to, which is why writing clear payment terms into your contracts matters as much as the conversation itself.
That framing keeps the boundary intact while still giving the client a choice, which is usually what turns a “no” into a conversation instead of a conflict.
It also holds up the second time a client asks, which matters more than the first. A one-off explanation can sound like a personal preference. A written payment policy, referenced the same way every time, sounds like exactly what it is: how the business runs. Designers who put this in writing before a project starts, rather than explaining it mid-project, report far fewer of these conversations altogether.
Boundaries like this are what keep vendors willing to work with you
Processing fees are a few percentage points. Vendor relationships, resale certificates, and clean books take years to build and very little to damage. That is the actual trade a client is asking for when they suggest using their card directly, even when that is not how the request is meant.
@amyvermillioninteriors said what a lot of designers were thinking:
“What are we even talking about here? I have never (in almost 30 years) used a clients credit card to make a purchase from a trade vendor. Maybe Im misunderstanding the question but this seems bananas to me. What happens when the client decides to make a chargeback and the vendor decides never to work with you again? Why are we doing this?”
@amyvermillioninteriors
Thirty years of trade relationships is the answer to “why are we doing this?” Every vendor account a designer holds is built on the assumption that the purchases on it belong to them, priced, taxed, and reconciled through their own business. A client’s card, even used once, breaks that assumption.
The fee conversation is worth having openly. The card itself is not up for negotiation, and the designers who hold that line clearly, with a reason rather than just a refusal, tend to keep both the client and vendor relationship intact. That kind of clarity is what strong client communication and boundaries look like in practice: a policy stated once, applied consistently, and never renegotiated on a case-by-case basis.
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