Scope before calculation
The current calculator supports eBay US, No Store or Starter Store, and most categories for a standard one-item order with buyer payment at or below $7,500. Higher totals, unsupported Store plans, and category exceptions are blocked instead of being guessed.
How the estimate is built
- Buyer payment. The item price, buyer-paid shipping, and collected sales tax are combined to model the buyer payment used by the selected rule.
- Modeled platform fees. Final-value tiers and the per-order fee are shown as separate line items.
- Proceed and profit. Sales tax is kept out of seller revenue. Costs you enter are subtracted from net proceeds to estimate profit.
Rounding and final charges
This scope stays within the published 13.6% first tier. When buyer payment is expressed in whole cents, that rate cannot produce an exact half-cent result. The two public eBay scenarios also exercise ordinary nearest-cent results in both directions. Together, these facts support a deterministic estimate within the stated range without resolving eBay's universal half-cent policy.
MarketCalcs uses half-up for its repeatable cent conversion. That is a disclosed product convention and mathematical scope decision, not a statement that eBay applies the same rule to every fee or order.
Important: eBay calculates the final charge per order. Your eBay transaction details and statement remain authoritative.
What is not modeled
- Category-specific and Store-plan exceptions
- Promoted Listings, international, and surcharge fees
- Refunds, returns, account-specific adjustments, and credits
- Tax, accounting, or legal outcomes
Sources and change control
The selected rule set is marked as a scoped estimate, not as a universal verified billing rule. Public eBay fee materials and official scenarios provide regression coverage for one-item buyer payments at or below $7,500. A real transaction detail is still required before expanding to higher-value tiered orders or claiming universal billing reproduction.