What should a restaurant calculate before raising marketplace menu prices to offset fees?

First measure observed marketplace cost by platform and the current contribution of major menu items. Separate commission, marketing, promotions, refunds, error charges, and fulfillment costs. Review the governing agreement and marketplace rules before changing prices. Then test item-level price scenarios, not one blanket percentage.

A markup can protect contribution but can also affect demand, conversion, guest trust, and relative value. Start with a bounded group of items, record the effective date, and compare order volume and contribution with a stable baseline. Do not claim an optimal markup without demand evidence.