SellerSays helps small cross-border sellers understand the real cost before they price, source, or ship.

Landed cost & import duty calculator

Calculate the real landed cost of a cross-border parcel — goods, shipping, duty, and import tax — for the US, UK, EU, Canada, Australia, and Japan, with official sources.

What will you actually keep? Net margin calculator

Work out real per-order profit after platform fees, payment fees, currency conversion, shipping, duty, returns, and chargebacks.

Amazon seller fees: what you pay per sale

Calculate Amazon US referral fees for your category and price — including the tiered clothing, beauty, and electronics-accessories schedules — with official sources.

eBay seller fees: what you pay per sale

Calculate eBay US final value fees — 13.6% plus the per-order fee — and see what cross-border orders add, with official sources.

Etsy fees: what you pay per sale

Calculate what Etsy takes per sale — $0.20 listing, 6.5% transaction, 3% + $0.25 processing — plus the Offsite Ads and currency-conversion fees that surprise sellers.

TikTok Shop fees: what sellers pay

TikTok Shop US charges a 6% referral fee for most categories — the lowest of the major marketplaces. What that number hides, with official sources.

Shopify fees: what your store really costs

What Shopify actually costs per order: plan subscription, Shopify Payments rates, the external-gateway penalty, and the 1.5–2% currency conversion fee — with official sources.

Reorder point & safety stock calculator

When to reorder and how much buffer to hold, using the transparent max-method — built for long, variable cross-border lead times.

Cash conversion cycle calculator

How many days your cash is locked between paying suppliers and getting paid out — and how much money that traps at your run-rate.

What are chargebacks really costing you?

Expected monthly chargeback cost from your volume and dispute rate — with Stripe's and PayPal's official dispute fees — plus the evidence that wins disputes.

FBA fee calculator (2026 rate card)

Calculate your exact 2026 FBA fulfillment fee from Amazon's official rate card — size tier, price band, dimensional weight, and the 3.5% fuel surcharge the tables leave out.

Walmart WFS fee calculator

Calculate your exact Walmart Fulfillment Services fee from the official public rate card — billed weight (+0.25 lb packaging rule), band formulas, apparel/hazmat/under-$10 surcharges, and the rate card's own 31–50 lb quirk.

Return, refund, or replace? Cost calculator

Compare the real cost of accepting a return, refunding without a return, or shipping a replacement — for cross-border orders where return shipping often costs more than the item.

Stripe vs PayPal for cross-border orders

Official 2026 fee comparison for international orders: processing, international card surcharges, and currency conversion — and what you actually receive per order.

Wise vs Payoneer for getting paid

Which receiving account keeps more of your marketplace payouts? Official conversion and withdrawal fees compared on your real volume.

Which marketplace costs you least?

Compare what each marketplace actually takes per order — referral fees, fixed fees, and subscriptions — on your price, category, and volume.

DDP vs DAP: who pays the duties on your orders?

Delivered Duty Paid vs Delivered At Place for cross-border parcels: cost, buyer experience, refusal risk, and when each is the right call.

PayPal vs Payoneer: which fits how you get paid?

PayPal accepts buyer payments; Payoneer receives marketplace payouts. When each is right, what each costs on your volume — with official fee sources.

Wise vs Revolut Business for getting paid

Wise's flat 0.57% conversion vs Revolut's plan allowances then 0.6% — which keeps more of your foreign revenue depends on your monthly volume. Official fees, compared on your numbers.

FBA vs FBM: run your real numbers

Compare Amazon's official 2026 FBA fee against your real self-fulfillment cost per order — then weigh the Prime badge, storage, and control factors the math can't settle.

Is shipping insurance worth it? The two-line math

Insurance is worth it when premium < loss rate × order value — after counting the coverage already included (PMI/Express include the first $200). The expected-value rule, honestly applied.

How to sell internationally: nine decisions, in order

Selling abroad is nine decisions in a fixed order — can I sell it, where, compliance, shipping, payment, what the buyer pays, what you receive, what you keep, and what happens when it goes wrong. Each step links to a working tool.

US de minimis and tariffs in 2026: the current rule set

The $800 de minimis is suspended for all countries, IEEPA tariffs were struck down, and since July 24, 2026 a Section 301 forced-labor tariff of 10% or 12.5% by country replaced the expired Section 122 surcharge. The current rule set for US-bound parcels, with official sources.

The UK £135 rule: who charges VAT on your orders

At or below £135, you charge UK VAT at checkout and remit to HMRC. Above it, import VAT and duty apply. What cross-border sellers must do, with official sources.

IOSS and the €150 line: EU imports for sellers

How IOSS works, the July 2026 abolition of the €150 duty exemption, the temporary €3-per-item duty, and what changes above €150 — with official sources.

De minimis and import-tax thresholds by country

One table of the thresholds that decide whether your parcel owes duty or tax: US, UK, EU, Canada, Australia, Japan — each cited to an official source.

When selling abroad forces you to register for VAT or GST

The registration triggers cross-border sellers actually hit: UK £135 direct sales, EU IOSS, Australia's A$75k rule — and when a marketplace carries the obligation for you.

Stripe fees by seller country

Stripe's standard pricing differs sharply by seller country — domestic rates from 1.5% to 3.4%, international surcharges, FX fees, and dispute fees, each cited to Stripe's official per-country pricing page.

Do you need a US customs bond?

A customs bond is required for commercial US imports over $2,500 and for regulated goods at any value. Single-transaction vs continuous ($50,000 minimum), and how to get one — from CBP's official pages.

Do you need a US import license?

CBP requires no general import license — but specific goods need permits from FDA, USDA, EPA, CPSC and others, and formal entries need a bond. What actually applies to your product, from official CBP pages.

eBay International Shipping: the rare free lunch, explained

eBay's international program costs US sellers nothing extra, waives the 1.65% international fee, makes the buyer pay duties, and shifts risk to eBay at the domestic hub — official terms explained.

Amazon Global Selling: what expanding marketplaces actually costs

One merged Professional fee (capped at $39.99/mo) across linked marketplaces, unified NA and Europe accounts, and NARF to sell US inventory into Canada/Mexico/Brazil — official structure explained.

When does selling into the US create sales-tax obligations?

When selling into the US creates state sales-tax obligations: the $100k/200-transaction pattern, big-state $500k thresholds (CA/TX/NY officially cited), marketplace facilitator laws, and why foreign sellers aren't exempt.

Do you need an EORI number?

When a cross-border seller needs an EU or GB EORI number, when the carrier's declaration covers you, why a GB EORI doesn't work in the EU — from official EU and UK sources.

The commercial invoice: what customs actually requires on it

The commercial invoice drives the customs declaration. What US regulations (19 CFR 141.86) actually require, what carriers add (HS code strongly recommended, 3 copies, paperless), and USMCA origin certification basics.

What you can't ship internationally (and what needs permits)

Lithium batteries, perfume, aerosols, food, knives, cosmetics quantity caps — the official prohibited and restricted lists for the US, UK, EU, Canada, Australia, and Japan, seller-relevant items first.

UPC/GTIN codes for marketplaces: buy right, once

Amazon checks UPCs against the GS1 database and removes listings with reseller barcodes. GS1's official pricing ($30 single GTIN, prefix tiers) and when you can skip barcodes entirely.

Amazon Brand Registry: the trademark is the ticket

Brand Registry is free — the trademark isn't: USPTO $350/class, or Amazon IP Accelerator at $700 + government fees for a pending-mark fast path. Requirements and benefits from official sources.

Country-of-origin labeling: the 10% mistake

Every imported article must be marked with its origin — conspicuous, legible, permanent, in English — or face a 10% marking duty. Plus the FTC's 'all or virtually all' bar for Made-in-USA claims.

AD/CVD: the duty risk that arrives years later

AD/CVD orders can multiply your duty bill and the final amount isn't settled at entry — liability runs retrospectively with interest. What they are, how to check your product officially, and why the risk is asymmetric.

Does your product need FDA compliance to import into the US?

What FDA requires before you import food, cosmetics (MoCRA), supplements, or devices into the US — registration, listing, prior notice, or marketing authorization — as statuses, with official sources.

Duty drawback: reclaiming US import duties on re-exports

Drawback refunds 99% of US import duties on goods you re-export or destroy — within a 5-year window. What it is, what it takes, and whether it's realistic for a small seller, with official CBP sources.

Finding your HS/HTS code — and what it really costs you

Find your product's HTS code the right way (official USITC lookup + CBP binding rulings), understand the 10-digit structure and the GRI, and see why the HTS base rate is not the duty you actually pay in 2026.

USPS international shipping rates (July 2026)

Current USPS retail prices for international parcels — First-Class Package International, Priority Mail International, and Express — to Canada, UK, Germany, Australia, and Japan, from the official price list.

CE marking: does your product need it — and what else the EU requires

Which product families require CE marking, which don't, and the EU responsible-person rule that catches online sellers — statuses with official sources, not legal advice.

EPR in Germany and France: registration is the price of listing

Germany's LUCID packaging register has no small-seller exemption, and French marketplaces pay (then block) for unregistered sellers. The registration-required rules, with official sources.