About Our Calculators

Methodology

Our calculators use the published fee structures from each platform's official documentation. We compute listing fees, transaction fees, payment processing charges, and any additional platform-specific costs based on your inputs. Each fee in the result panel links directly to the source we used and shows the date it was last verified.

Fee Sources & Verification

Every fee in our calculators is traceable. The table below lists every fee we apply, the official source we consulted, and when we last verified the rate. If you spot a rate that has changed, please let us know.

Etsy

Last verified: 2026-08-22
  • Listing Fee — $0.20 per listing, charged when a listing is created or renewed. Modelled once per order (one item per order).
    Source ↗ (2026-08-22)
  • Transaction Fee — 6.5% of the total order amount — Etsy applies it to shipping and gift wrap you charge the buyer, not just the item price.
    Source ↗ (2026-08-22)
  • Payment Processing — 3% + $0.25 per order on the US rate, charged on the order total including shipping. The rate and flat amount vary by country.
    Source ↗ (2026-08-22)
  • Offsite Ads — 15% of an attributed order for shops under $10,000 in any 365-day period (who may opt out), 12% for shops at or above it (who cannot). Capped at $100 per order. Modelled as an expected cost across the share of orders you attribute to Offsite Ads.
    Source ↗ (2026-08-22)
  • Refunds — On a seller-issued refund Etsy credits the transaction and payment processing fees proportionally; the listing fee is only refunded if you also cancel. Fees are not credited when Etsy covers the refund.
    Source ↗ (2026-08-22)

Shopify

Last verified: 2026-08-22
  • Payment Processing — 2.9% + $0.30 per online card transaction on the Basic plan via Shopify Payments, charged on the total the buyer pays including shipping. Third-party gateways add a plan-dependent fee that this calculator does not yet model.
    Source ↗ (2026-08-22)
  • Shopify Plan — Billed monthly: Basic $39 (2.9% + $0.30), Grow $105 (2.7% + $0.30), Advanced $399 (2.5% + $0.30), Plus from $2,300 (2.25% + $0.30). Annual billing is cheaper and is not modelled.
    Source ↗ (2026-08-22)
  • Third-party gateway fee — Charged by Shopify when you use a payment provider other than Shopify Payments, on top of that provider’s own fees: 2% on Basic, 1% on Grow, 0.6% on Advanced, 0.2% on Plus.
    Source ↗ (2026-08-22)
  • Chargebacks — Modelled at $15 per dispute, the standard card-network dispute fee, plus the lost order value. Your processor’s fee may differ.
    Source ↗ (2026-08-22)
  • Refunds — Shopify does not return card processing fees when you refund an order, so a refund costs you the order value and the processing fee you already paid.
    Source ↗ (2026-08-22)

Dropshipping

Last verified: 2026-08-22
  • Platform Fee — User-supplied — depends on the marketplace or storefront you sell through. Applied to the order total including shipping charged.
    Source ↗ (2026-08-22)
  • Payment gateway — Stripe’s standard US online card rate is 2.9% + $0.30 per successful charge, with a $15 fee for each dispute received. Shopify Payments matches that rate on the Basic plan.
    Source ↗ (2026-08-22)
  • Disputes — Each dispute costs the order value plus a $15 dispute fee, whatever the outcome.
    Source ↗ (2026-08-22)
  • Import duties — User-supplied — duty rates depend on the destination country and product classification.
    Source ↗ (2026-08-22)

Amazon FBA

Last verified: 2026-08-22
  • Referral Fee — Category rates from Amazon’s published referral fee schedule, charged on the portion of the total sales price inside each price band, on the order total including shipping. Most categories carry a $0.30 per-item minimum.
    Source ↗ (2026-08-22)
  • FBA Fulfillment — Per-unit fee set by size tier and shipping weight. US rates rose an average of $0.08 per unit on 2026-01-15, and a 3.5% fuel and logistics surcharge applies to fulfilment fees from 2026-04-17 — enter the surcharged figure from your own fee preview until the calculator derives it.
    Source ↗ (2026-08-22)
  • Storage Fee — Monthly storage is charged per cubic foot and rises sharply from October through December.
    Source ↗ (2026-08-22)
  • Fuel surcharge — 3.5% fuel and logistics surcharge applied to US and Canada FBA fulfilment fees since 17 April 2026 — calculated on the fulfilment fee, not the sale price.
    Source ↗ (2026-08-22)
  • Refunds — Amazon returns the referral fee minus a refund administration fee of the lesser of $5.00 or 20% of that referral fee. The fulfilment fee already spent on the order is not returned.
    Source ↗ (2026-08-22)
  • Professional selling plan — $39.99 per month for the Professional selling plan. The Individual plan charges $0.99 per item sold instead — set this to 0 and add $0.99 to your per-unit costs to model it.
    Source ↗ (2026-08-22)

eBay

Last verified: 2026-08-22
  • Final Value Fee — 13.6% on the portion of the sale up to $7,500 and 2.35% above it for most categories, charged on the total amount of the sale including the shipping the buyer pays. Books, movies and music are 15.3%; jewellery and watches 15% to $5,000 then 9%.
    Source ↗ (2026-08-22)
  • Per-order fee — $0.30 per order on orders of $10 or less, $0.40 on orders above $10. Athletic shoes priced $150 and over carry no per-order fee.
    Source ↗ (2026-08-22)
  • Insertion fees — 250 zero-insertion-fee listings a month, then $0.35 per listing. An eBay Store subscription raises the free allowance.
    Source ↗ (2026-08-22)
  • Store subscription — Optional monthly eBay Store subscription. Enter the plan you pay for — it raises your free listing allowance and lowers some fees.
    Source ↗ (2026-08-22)
  • Refunds — eBay credits the variable part of the final value fee on a refund; the per-order fee is retained.
    Source ↗ (2026-08-22)

Walmart Marketplace

Last verified: 2026-08-22
  • Referral Fee — Walmart charges a referral fee on gross sales, set by the item’s contract category and ranging from 6% to 15%. Some categories switch rate by price band, others charge each rate on the portion of the price inside its band — both are modelled as published.
    Source ↗ (2026-08-22)
  • WFS fulfilment — Walmart Fulfillment Services charges a per-unit fee set by weight and size, plus monthly storage. Take your per-unit figure from Walmart’s WFS estimator — this calculator does not derive it.
    Source ↗ (2026-08-22)
  • Refunds — Walmart credits the referral fee on a refunded order. Fulfilment work already performed is not returned.
    Source ↗ (2026-08-22)

TikTok Shop

Last verified: 2026-08-22
  • Referral Fee — NOT VERIFIED AT SOURCE: TikTok Shop publishes its US fee schedule behind a Seller Center login, so we cannot cite a rate the way we do for every other platform here. The 8% default reflects the standard non-food rate widely reported since August 2026; beauty and some electronics run higher and jewellery lower. Confirm your own rate in Seller Center and change the field — it is an input, not a fixed rate.
    Source ↗ (2026-08-22)
  • Creator commission — Affiliate commission you agree with creators, charged on orders they drive. Sellers commonly set 5-20%. Entered by you because you set it.
    Source ↗ (2026-08-22)
  • Refunds — Referral fees are generally credited on refunded orders; creator commission on a refunded order is not recovered.
    Source ↗ (2026-08-22)

Print on Demand

Last verified: 2026-08-22
  • Print provider cost — Your print provider’s base cost per item plus its shipping — the figures Printful, Printify, Gelato or your own supplier quote you. Entered as cost of goods and shipping because they are your costs, not a platform fee.
    Source ↗ (2026-08-22)
  • Subscription — Optional print-provider subscription that buys lower base costs. Charged monthly, so it is kept out of per-order margin.
    Source ↗ (2026-08-22)

Frequently Asked Questions

How accurate are these calculators?+
Each fee comes from the platform's official documentation, and the result panel on every calculator links back to that source with the date we last verified the rate. The math is pure functions covered by unit tests. Real-world accuracy depends on edge cases we don't model — region-specific surcharges, promotional discounts, account-tier differences. Use our numbers as a strong baseline, then verify your own account against your platform's fee schedule before pricing decisions.
How often do you update the fee data?+
Every fee record carries the date we last checked it against the platform's own schedule plus a review interval — 90 days for the marketplaces. Our test suite fails when a record goes past that interval, and the calculator shows an "outdated" flag instead of a green badge, so a missed re-check is visible to you rather than hidden. Every change we apply is dated and sourced on the fee changelog.
Is CommerceProfitLab free? How do you make money?+
All calculators and guides are 100% free with no signup, no email gate, and no upsell. We don't sell user data and we don't require accounts. Eventually we may add unobtrusive sponsorships from ecommerce tools we genuinely vouch for, but the calculator results themselves will never be paywalled or affiliate-influenced.
Why don't you have an account system?+
Because the tool doesn't need one. Your inputs save to your browser's localStorage so you can come back and find the last numbers you ran. We don't want to be in the business of storing your business data on our servers, and you shouldn't have to trust us to keep it secure. If you want to share or archive results, every calculator has an "Export CSV" button.
Can I use these calculators for my client work or as part of my service?+
Yes — the tools are free to use for any purpose, including commercial. If you're building a course, consulting practice, or freelance bookkeeping service for ecommerce sellers, feel free to link to specific calculators or embed screenshots in your work. We just ask that you don't scrape and rehost the calculators as your own.

Disclaimer

This tool provides estimates only and does not constitute financial advice. Actual fees may vary based on your location, account type, currency conversion rates, and promotional programs. Always verify with your platform's official fee schedule before making business decisions.

Fee data last changed 2026-08-23 · oldest record verified 2026-08-22 · see the changelog

How we keep these numbers honest

Our calculators are only as trustworthy as the data behind them. Every fee in every result links to its source — and here's the process behind that.

  1. Step 1

    Pull from the source

    Each fee starts from the platform's official pricing or fee page — never a blog post, never a screenshot.

  2. Step 2

    Encode the formula

    The rate goes into platforms.json with a verified date. Calculations are pure functions, unit-tested.

  3. Step 3

    Link the proof

    Every fee row exposes the source URL and the date we last verified it — so you can audit the number yourself.

  4. Step 4

    Re-verify on cadence

    Every record carries a review interval, and our test suite fails once one is overdue — so a missed re-check surfaces instead of ageing quietly. Rates past review are flagged on the calculator itself.