How to Understand Buyer's Premiums and Auction Fees

The winning bid at an auction is rarely the amount you end up paying. This guide is for buyers who want to understand the buyer's premium and the other charges that can be added to a purchase, so they can work out their real cost before raising a paddle.

What the hammer price is

The hammer price is the final bid accepted by the auctioneer when the lot is sold. It is the number you hear called out and see on the screen. Most auction fees are calculated from the hammer price, which is why it is the starting point for figuring out what you owe.

What a buyer's premium is

A buyer's premium is a charge the auction company adds on top of the hammer price, usually as a percentage. It is part of how the company is paid for running the sale. The rate varies widely from company to company, and sometimes from sale to sale within the same company.

Some important variations to look for:

• Tiered premiums: Some companies charge one rate up to a certain amount and a lower rate above it.
• Different rates by bidding method: Online bidding sometimes carries a higher premium than bidding in person, because of platform costs.
• Cash or check discounts: Some companies reduce the premium if you pay with cash or check instead of a card.
• No premium: Some sales, often smaller local auctions, charge no buyer's premium at all.

The premium is always stated somewhere in the terms of sale or catalog. If you cannot find it, ask before you bid.

Other fees you may see

The buyer's premium is the most common charge, but it is not the only one. Depending on the company and the type of sale, you might also see:

• Sales tax: Usually charged on the hammer price plus premium, depending on your state's rules and whether you have a valid exemption.
• Card processing fees: Some companies pass along a surcharge for credit card payments.
• Online platform fees: A separate per-lot or percentage fee for bidding through a third-party bidding service.
• Title or document fees: Common for vehicles, boats and real estate.
• Storage fees: Charged if you do not pick up your items by the stated deadline.
• Handling or packing fees: Charged if the auction house packs or ships items for you.
• Loading fees: Sometimes charged for heavy equipment that needs a forklift or crew.

How to calculate your total cost

Before you bid, work backward from what you are willing to spend in total. A simple way to think about it:

1. Decide the most you will pay, all in, including tax and shipping.
2. Subtract your estimated shipping or transport cost.
3. Divide the remainder by one plus the premium rate (for example, by 1.2 for a 20 percent premium) to remove the premium.
4. Adjust for sales tax if it applies to you.
5. The result is roughly your maximum hammer bid.

The 20 percent figure above is only an example to show the math. Use the actual rate stated in the sale's terms. A small calculator note on your phone or catalog can save you from overspending in the moment.

Where to find the fee information

Fees are normally listed in the terms and conditions, the catalog front matter, the registration page or the online bidding page for each lot. Read them for every sale, even with companies you know, because rates and policies change.

If anything is unclear, call or email the auction company before the sale. Ask directly what the premium is for your bidding method, whether there is a card fee, and whether any other charges apply to the specific lots you want.

Why the premium matters for comparisons

When you research past prices, check whether the figures you see include the buyer's premium. Some results show hammer price only, while others show the total including premium. Mixing the two can make an item look cheaper or more expensive than it really sold for.

Likewise, when comparing an auction purchase to buying from a dealer or shop, compare your total cost, not the hammer price, to the dealer's price.

Quick checklist

• Find the buyer's premium rate for your bidding method.
• Check for tiered rates, card surcharges and platform fees.
• Factor in sales tax and any exemption you qualify for.
• Add the cost of shipping, transport or storage.
• Convert your total budget into a maximum hammer bid.
• Ask the auction company about anything you cannot find in writing.