The breakeven formula
Breakeven sale price equals landed cost plus fulfillment cost, divided by one minus percentage-based fees. If referral fees, payment fees, and advertising take 26 percent of revenue, each dollar of extra tariff requires more than one dollar of sale price to preserve margin.
Why low-price products are fragile
A product selling for less than $20 has limited room for freight spikes, duty changes, returns, and ad cost increases. Before ordering, model a higher-tariff scenario and a higher-ad-spend scenario together.
When to walk away
If the target price required for a healthy margin is above the search result page's realistic price range, the product may need a bundle, better differentiation, lower freight cost, or a different supplier.
Use tariff stress tests before samples, not after inventory is already on the water.
This page is a planning model, not customs, tax, legal, or Amazon fee advice. Verify HTS classification, current trade actions, marketplace fees, and fulfillment assumptions before making inventory decisions.