Buyer's premium
-Auction Invoice
Buyer Cost Calculator
Estimate the all-in invoice total from hammer price, buyer's premium, taxes, shipping, handling, and platform fees.
Enter invoice assumptions
The calculator will estimate the premium, tax, fees, and all-in buyer cost.
Tax estimate
-Total fees
-Estimated invoice total
-Buyer cost estimate for auction invoices
Use AuctionMath's buyer cost calculator to estimate how buyer's premium, sales tax, shipping, handling, and platform fees affect the final amount owed after an auction purchase. This tool is useful for checking auction invoices, comparing purchase scenarios, budgeting for lots before pickup or shipment, and documenting all-in cost assumptions for resale or appraisal records.