Fixed costs
Per unit
Refunds are not modeled. If you expect 10% refunds, add about 10% to the units.
How break-even units are calculated
Margin per unit
margin = price − product − shipping − price × (referral % + commission %)What each sale adds toward your fixed costs. Use an average commission, since only affiliate orders pay it.
Break-even units
units = fixed costs ÷ margin per unit (rounded up)Fixed costs are the money you spend whether or not you sell: samples, ads budget, tools.
Days to break even
days = units ÷ daily salesA quick check that the plan pays back before the product's moment passes.
Frequently asked questions
What counts as a fixed cost on TikTok Shop?
Spend that doesn't change per order: samples, an ads budget, apps, photos and flat creator fees. Per-order costs belong in the margin.
What referral fee should I use?
TikTok's public US table lists 6% for most categories; trade reports say many moved to 8% in August 2026. Use the rate in your Seller Center.
Should ads be fixed or per unit?
Treat a set test budget as fixed. If you pay a steady cost per order, add it to the per-unit costs instead.
Related free tools
Sources: Dashboardly: TikTok Shop fees 2026, the complete seller fee guide · beBOLD: TikTok Shop 8% referral fee report