What the hammer price leaves out

The hammer falls; the arithmetic carries on. Auction estimates and hammer prices are visible signals, but the transaction has several ledgers. The buyer owes a premium on top of the winning bid. The seller’s proceeds depend on a separate consignment agreement. A guarantee can add a pre-sale minimum commitment and a negotiated share of any upside. The available record does not establish a standard requirement for that scenario. Published fee schedules provide one solid starting point: they specify charges and thresholds. Private contracts set a different limit: their precise allocations cannot be reconstructed from a headline result. Reading the two together gives a more useful picture of an auction than either the estimate or the winning bid can offer alone. To see how the buyer’s premium changes the visible price, examine the tier schedules published by major houses. Sotheby’s, for…