See where every fee goes on a listing
Platform fees hide in help docs. GrowMargin pre-fills standard rates for major marketplaces and custom gateways — with editable fields so calculations match your specific account tier.
Platform fee breakdown18.5% total
Listing fee$0.20
Transaction fee6.5%
Payment processing3% + $0.25
Fees take a real slice of your revenue — understand them before committing to inventory or ad budgets.
Full cost stack
Product costYou set
ShippingYou set
Platform feesPreset + editable
Ad spendOptional
Returns rateTrue net per order
Produces an actionable decision verdict (Good to scale / Watch closely / Fix first) — not just a raw fee total.
Know where money goes on every channel
Whether you sell on marketplaces or your standalone site, small fees quietly compound. GrowMargin starts from realistic defaults and lets you customize each line item.
- Marketplace referral and fulfilment estimates
- Listing, transaction, and payment gateway fees
- Fully customizable for international and discounted rates
- Integrated with break-even price floor calculations
Protect your profit margins
Get clear fee math, true net profit, and plain-language decisions before scaling your store.