From YITH > Auctions > General > Auction payments> Commission options.
- Charge a commission fee to winners of auction products: Decide if you want to charge the winner a commission fee, on top of the winning bid.
- Default commission fee: Either choose a fixed price, or a percentage of the winning bid.
- Show commission: Decide to show the fee on the product, cart & checkout page, or only on cart & checkout page.
- Default commission label: Name of the commission that is visible to the customer.
- Multiple commissions label: Name of the commission for the total amount of commissions that is visible to the customer.
You can override these commission settings on product level, within the product editing page.