This comes up again and again on the Jobber community and Houzz Pro forum. A contractor gets a steep vendor discount on furnishings and does not know whether to pass the savings through, mark each piece up to retail, or charge a flat design fee. The question behind vendor discount vs markup design fee is simple. You are not a retailer. You are delivering a finished project. I do not show clients my trade invoices. I price the deliverable and let the scope speak for itself. For the broader system on tracking these numbers, see our post on job costing for contractors.

What is the difference between a vendor discount and a markup design fee?

A vendor discount is the reduced trade price I negotiate with a supplier because I buy in volume or through a trade program. A markup design fee is what I charge the client for the work of selecting, procuring, and managing delivery of those furnishings. They are not the same line item, and I do not confuse them when I talk to the client.

The discount belongs to my business. It is a benefit between me and the vendor. The design fee is a service charge between me and the client. I can use both at once. I often buy at trade pricing and also charge a flat fee for my time. The key is separating the story I tell the client from the invoice the vendor sends me. If you are unsure how markup interacts with overall job profit, read our breakdown of material markup vs job markup.

How do you mark up furniture without showing the client your invoice?

You stop showing invoices. I bill by the piece, by the room, or by a flat procurement fee. If the proposal lists every sofa and lamp with my price next to it, the client has no reason to ask what I paid. My price is my price.

When a client asks to see vendor receipts, that usually means the proposal looks too low or too high. It is a trust problem, not a transparency problem. I fix it by presenting a clean scope with clear deliverables. If you want to be fully transparent, disclose a design fee upfront and show the pass-through cost at retail. In my experience, most contractors do better when they set a firm price and let the client say yes or no. If you want help deciding how much cushion to build in, see our guide on markup vs margin for contractors.

Which pricing model earns more: cost-plus or flat design fee?

It depends on the depth of your trade discount and the retail price of the item. At a deep discount, cost-plus often nets more. At a shallow discount, a design fee protects your margin without looking greedy.

Here is how the three common models compare.

Let me walk through a real example. Say I buy a sofa through my trade account for $2,000. The retail price is $3,500. Under a cost-plus model, I might bill the client $3,200. That is $1,200 gross profit. Under a flat design-fee model, I bill the client the retail price of $3,500. I also charge a procurement fee of $750. That is $2,250 gross profit. The design-fee model wins here because the retail floor gives me cover and the fee is explicit. But if the trade price is only ten percent below retail, the cost-plus model can look reasonable. The design fee looks thin. The math changes job by job. For more on setting the right overall job price, see going rate vs own pricing.

How do sales tax and resale certificates affect your pricing method?

If you hold a valid resale certificate, you buy furnishings tax-free and collect sales tax from the client based on the full amount you charge them. If you do not have one, you paid sales tax at purchase and your margin is already compressed before you quote the job.

This is where the tax mechanics matter. Under IRC §61, gross income includes all income from whatever source derived. Whether you label it markup or design fee, the net profit is taxable. But the sales tax collection obligation depends on your state and your certificate status. In most states, a resale certificate lets you purchase tangible personal property for resale without paying tax at the vendor level. You then collect tax from the end buyer on your selling price. If you skip the certificate, you are the end buyer. You pay tax. You cannot simply add tax on top later unless your contract is structured as a taxable sale. Some contractors accidentally create a use-tax liability by buying tax-free for one job and using the goods on another. I keep my certificate current and match my purchase orders to the specific project so the paper trail is clean. If you are wondering whether to discount at all, see our post on should you offer discounts.

What should your proposal look like to protect your margin?

One lump-sum line per scope item, or a flat fee schedule with no vendor detail. I do not itemize my cost. I itemize the deliverable.

A clean proposal might read: "Living room furnishings package — $8,500." Or: "Procurement and project management fee — $2,500; furnishings at retail — $6,000." Either way, the client sees a clear total and a clear scope. They do not see my trade discount. They do not see the vendor name unless delivery logistics require it. I build my profit into the number I present, not into a line that invites negotiation.

How do you handle a client who wants receipts or questions your fee?

Want a second set of eyes on how your pricing structure hits your tax return? We help contractors structure bids that protect margin and keep the books clean. Book a meeting with our team here.