Free auction calculator · Manual inputs
Sports Card Maximum Bid Calculator
Work backward from realistic resale value and your required return before an auction starts. The winning bid is only one part of landed cost.
Set your auction assumptions
This model assumes tax applies to hammer price plus buyer premium. Auction houses can calculate taxable amounts differently, so verify the invoice rules for the venue you are using.
How a maximum bid works
Start with a supported resale value. Subtract expected selling costs, then determine the most landed cost you can tolerate while still meeting your profit and ROI requirements. Finally, work backward through buyer premium, tax, and shipping to find the maximum hammer bid.
Read the full maximum auction bid guide for the formula, assumptions, and combined-shipping considerations.