Import cost research Duty / MPF / HMF Seller margin worksheet
Reviewed Jun 8, 2026

Estimate worksheet

Amazon FBA landed-cost calculator

Estimate whether an imported product can survive Amazon referral fees, FBA-style fulfillment, duty, tariff overlays, freight, MPF, and HMF.

HTS

Search suggestions are starter estimates. Verify classification and Chapter 99 treatment before relying on results.

Tariff stack

Check HTS
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Entry fees

MPF and HMF

Marketplace

Per unit

Starter Amazon inputs use a common referral-fee placeholder plus an editable per-unit fulfillment cost. Check your Seller Central category and FBA fee preview.

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Calculator pages

Marketplace and storefront calculators

Focused calculators for common selling channels. Each page keeps the same customs worksheet with platform-specific starter inputs.

General tariff calculator Import duty, MPF, HMF, landed cost, and resale margin. Amazon FBA Referral fee, FBA-style fulfillment, tariffs, and margin. Current page. Shopify Payment processing, merchant fulfillment, and tariff math. Etsy Transaction, payment, listing, import, and margin estimate. TikTok Shop Referral, creator/affiliate room, landed cost, and margin. eBay Final value fee, per-order fee, duty, and resale margin. Walmart Marketplace Referral-fee placeholder, WFS-style fulfillment, and tariffs. WooCommerce Payment processing, merchant fulfillment, and import cost. BigCommerce Storefront payment processing and landed-cost estimate. Wix Stores Payment processing, fulfillment, tariffs, and margin. Squarespace Commerce Storefront fees, processing, import duty, and margin.

Optional batch tool

Compare several SKUs ?

Paste CSV rows exported from a spreadsheet, or create one row from the calculator above.

Required columns: sku, unit_cost, qty, freight, sell_price, base_duty, extra_tariff. Use 25 for 25%, not 0.25.

Batch results

Per unit estimate
SKU Landed/unit Profit/unit Margin

Reference trail

Sources and limits

Defaults are intended to make the worksheet useful on day one, not to replace a broker, customs ruling, or official HTS review.

Amazon seller pricing Platform fee reference for this page. Use the calculator inputs to match your exact account, category, plan, and fulfillment setup. USITC Harmonized Tariff Schedule Official HTS search, current revision, Chapter 99 notices, and export data. CBP Merchandise Processing Fee Formal MPF rate, FY2026 minimum and maximum, and informal fee references. CBP Importing into the United States General import process reference, including HMF discussion. USTR Section 301 tariff actions China Section 301 action and exclusion reference pages.

Amazon FBA

Amazon FBA Import Cost — What the Calculator Covers

Amazon FBA sellers sourcing from overseas face the full U.S. customs cost stack before the first referral fee is ever charged. The default inputs here use Amazon's standard referral rate (15%) and a typical FBA-style fulfillment cost. Both are editable — check your Seller Central category for the actual rate and FBA fee estimate for your ASIN.

What Amazon fees does this calculator include?

The calculator includes a referral fee (percentage of selling price) and a flat per-unit fulfillment cost. The 15% referral rate and $3.40 fulfillment are starting points — your actual rates depend on category and unit size. FBA storage fees are not included per-unit by default; add them to the fulfillment field if you know your monthly storage cost per unit.

Why does landed cost matter more than supplier cost for FBA?

Amazon's profit calculator uses your "cost of product" field — which most sellers fill in with their supplier invoice price. That understates true cost. A product at $4.25/unit from a Chinese supplier can land at $7.10 after duty, freight, MPF, and tariffs. Running Amazon's calculator on $4.25 gives you a false margin. Running it on $7.10 gives you the real one.

How do Section 301 tariffs affect Amazon FBA sellers?

Section 301 tariffs apply at the import level, before the goods arrive at FBA. A 25% tariff on a $4.25 product adds $1.06 per unit in duty on top of the base rate. That $1.06 comes directly out of your margin before Amazon takes its referral fee. The origin scenarios table shows what margin looks like if you moved sourcing to Vietnam or India, where Section 301 generally doesn't apply.