Seller's Premium vs. Buyer's Premium: How Auction Houses Really Make Money

Published: June 29, 2026

The short answer: Auction houses charge both sides. The buyer's premium is the public fee — 27% at Christie's on the first CHF 1.2 million in Geneva. The seller's premium is negotiated privately and rarely disclosed. The house profits from both, but the real money is in volume, not percentage points.

---

I've sat in the room at Christie's Geneva watching a Kashmir sapphire ring hammer at CHF 800,000. The buyer paid CHF 1,016,000. That extra CHF 216,000 didn't go to the seller — it went to Christie's. Nobody in the room blinked because everyone there had already done the math before raising a paddle.

I tell every client the same thing before they bid for the first time: the hammer price is not the price. The hammer is the starting line. What you actually pay is hammer plus premium plus, depending on the lot, shipping and insurance. Know your walk-away number before your hand goes up. I learned that the expensive way in 2010 at a Doyle New York sale when I forgot to add the 20% and overpaid on a Belle Époque brooch by about $1,400. I still sold it for a profit, but the lesson stuck.

How Much Is Christie's Buyer's Premium?

Christie's uses a tiered structure that resets per lot. As of 2026 in Geneva, it's 27% on the first CHF 1,200,000, then 22% on the portion from CHF 1,200,001 to CHF 6,500,000, and 15% on anything above CHF 6,500,000.

Run the numbers on a CHF 5 million hammer. You're paying 27% on the first CHF 1.2 million (CHF 324,000) plus 22% on the remaining CHF 3.8 million (CHF 836,000). Total premium: CHF 1,160,000. Your all-in is CHF 6,160,000. That's 23.2% in fees, not 27%. The blended rate drops as the hammer rises because of those tier breaks.

Sotheby's runs a similar structure. Phillips typically sits at 26% on the first tier. Bonhams often comes in slightly lower, but the inventory quality gap matters more than the fee difference. I bid at Christie's and Sotheby's primarily because the lots I want — signed vintage Cartier, unheated Burmese rubies, important Kashmir sapphires — show up there. A 1% fee difference doesn't move the needle when you're chasing the right stone.

Smaller houses like Doyle and Heritage charge lower premiums, sometimes 20–25% flat. But the material is different. I use them for estate jewelry buys and secondary-market signed pieces, not trophy lots.

What Is Seller's Premium and How Is It Negotiated?

The seller's premium is the fee the auction house charges the consignor. Unlike the buyer's premium, it is not published. Every seller's rate is negotiated, and the numbers vary wildly depending on what you're consigning and who you are.

A consignor walking into Christie's with a CHF 10 million Argyle pink diamond collection has leverage. They might pay zero seller's commission, or the house might even offer a guarantee — a minimum price the house will pay regardless of whether the lot sells. I've heard of houses splitting the buyer's premium with major consignors to win the business.

A consignor with a single CHF 30,000 Cartier Tank watch pays the standard rate, probably 5–10%. The house covers catalog photography, marketing, and the physical auction — those costs get built into the seller's side.

Here's what most people don't realize: if a lot fails to sell, the consignor might still owe the house. Unsold lots can carry a buy-in fee, usually 1–5% of the low estimate. Some houses charge a withdrawal fee if you pull a lot after the catalog is printed. Read the consignment agreement carefully. I have a client who pulled three lots from a regional house in 2023 and got hit with a CHF 4,200 withdrawal charge he didn't see coming.

How Do Auction Fees Compare to Dealer Margins?

A buyer walking out of Christie's paying CHF 100,000 all-in might have paid CHF 78,700 at hammer — the rest went to fees. If that same piece were sitting in my showcase on 47th Street, it would be priced differently. Dealers don't charge a premium. We price inventory based on what we paid, what it's worth, and what the market will bear. You pay the sticker price plus tax. That's it.

But dealers also carry inventory risk. Auction houses don't. That's the fundamental trade-off. The house moves other people's property and collects a fee. I have capital tied up in every sapphire and every signed Van Cleef piece sitting in my safe. When the market slows down, the auction house still gets paid. I don't.

The transparency difference matters too. At auction, everyone in the room sees the same hammer price. The premium is public. The final number is verifiable. With dealers, you're trusting that the price reflects the market. A reputable dealer will show you comps — recent auction results, Rapaport pricing for diamonds, what similar stones have traded for. Ask for them. If a dealer won't show you comps, walk.

How to Calculate Your Real Auction Cost Before You Bid

1. Find the buyer's premium schedule for the specific auction house and location. New York, Geneva, and Hong Kong can all have different rates even at the same house.
2. Set your total all-in budget first, then back out the premium to find your maximum hammer bid.
3. Factor in the blended rate, not the top tier. A CHF 2 million hammer at Christie's Geneva runs about 24.1% blended, not 27%.
4. Add shipping, insurance, and any import duties. Exporting from Geneva to Hong Kong is VAT-free. Shipping to New York is not.
5. Build in a 3–5% cushion for the unexpected. Currency fluctuation between bidding and settlement. A last-minute wire issue. It happens.

Here's a quick reference for Christie's Geneva (current as of mid-2026, 1 USD ≈ 0.8048 CHF):

Hammer (CHF)	Effective Premium Rate	All-In (CHF)
500,000	27.0%	635,000
1,000,000	27.0%	1,270,000
2,000,000	24.1%	2,482,000
5,000,000	23.2%	6,160,000
10,000,000	20.3%	12,030,000

The takeaway: premium isn't a flat percentage in practice. Once your hammer crosses into that middle tier on a single lot, your effective rate drops. Bid accordingly.

---

I've made money on lots where I paid 27% to Christie's and resold the piece six months later at 40% above my all-in. I've also watched people overpay on premium-heavy lots they'll never get out of. The fee is just math. The question is whether the object is worth the number at the bottom of the invoice. Answer that before you bid, and the premium is just a line item.

---

Frequently Asked Questions

Do auction houses make more from buyer's premium or seller's premium?

Both, but the buyer's premium is the public profit center. At a major house, buyer's premium can account for 60–70% of total commission revenue. The seller's side is often discounted heavily for important consignments — houses compete fiercely for trophy property and will give up seller's commission entirely to win a collection. The buyer's premium is non-negotiable at the individual bidder level, which makes it the more reliable revenue stream. The math is simple: a CHF 1 million hammer at 27% generates CHF 270,000 on the buy side alone, and that number scales with every lot in every sale.

Can you negotiate the buyer's premium at Christie's or Sotheby's?

No. I've tried. Unless you're a museum, an institution, or a buyer spending eight figures annually, the premium schedule is fixed. Christie's and Sotheby's offer zero flexibility on the buyer's side at the individual level. What does vary is the seller's commission, which is aggressively negotiable depending on the quality and value of your consignment. If you're a frequent buyer and consignor with a relationship manager at the house, you might get perks — preferential viewing appointments, private sale access, condition report priority — but the premium rate itself doesn't budge. The only way to lower your effective premium is to bid on lots with higher hammers where the tiered structure reduces the blended rate.

Why don't auction houses just charge one transparent fee?

Because the dual-fee structure maximizes revenue from both sides of the transaction without either party feeling the full weight. A single 35% fee would be transparent — and would scare off both buyers and sellers. Splitting it into a visible buyer's premium and a hidden seller's commission lets the house charge effectively 30–40% combined while keeping the public conversation focused on the buyer's side. The seller's premium stays private, which protects the consignor's negotiating position and the house's margin. It's a pricing strategy that has worked for 250 years for a reason. I don't love it, but I respect the math.