Landed cost is the total per-unit cost of getting an imported product to your warehouse or fulfillment center. It includes supplier cost, freight, insurance, import duty, Merchandise Processing Fee (MPF), Harbor Maintenance Fee (HMF), brokerage, and tariff overlays like Section 301.

Harbor Maintenance Fee is a 0.125% fee on the value of cargo imported through U.S. ports via ocean vessel. Air freight shipments are exempt. The calculator includes HMF by default for ocean shipments.

Does Import Math replace a customs broker?

No. Import Math is a pre-purchase planning tool. It estimates costs for evaluation purposes but does not classify merchandise, issue customs rulings, or advise on compliance. A licensed customs broker is still required for regulated goods or complex import situations.

Estimate worksheet

Tariff and landed-cost calculator

Q: How does Section 301 affect my import costs?

Section 301 tariffs are additional duties applied on top of the standard HTS base duty rate for most goods imported from China. The overlay ranges from 7.5% to 25% depending on the product category. Sourcing from Vietnam, India, Mexico, or most other countries generally avoids these overlays.

Estimate import duty, tariff overlays, MPF, HMF, freight, marketplace costs, and resale margin from one practical worksheet.

Product or HTS lookup ?

HTS

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

HTS code ?

Country of origin ?

Unit cost ?

Quantity ?

Freight ?

Insurance ?

Brokerage and other ?

Selling price ?

Tariff stack

Check HTS

Base duty rate ?

Additional tariff ?

Entry fees

MPF and HMF

Merchandise Processing Fee ?

Informal fee ?

Include Harbor Maintenance Fee for vessel cargo Preference claim: set base duty to 0 and exempt MPF

Marketplace

Per unit

Use these fields for any marketplace, store builder, or wholesale channel. Platform fees are editable starter inputs.

Marketplace fee ?

Flat fee ?

Fulfillment ?

Target margin ?

Result

Margin estimate

Profit

Estimated profit per unit $0.00 0.0% margin

Landed cost per unit $0.00

Break-even sell price $0.00

Target sell price $0.00

Total shipment cost $0.00

Origin scenarios

Same cost inputs

Scenario	Tariff	Landed/unit	Margin

Educational estimate only. Classification, valuation, origin, trade remedies, exclusions, and entry treatment can change the result.

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. Current page. Landed cost formula guide Formula, worked example, checklist, and official source trail. Amazon FBA Referral fee, FBA-style fulfillment, tariffs, and margin. 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.

CSV input ?

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.

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.

Guide

How the Landed Cost Calculator Works

Enter your supplier cost, freight, HTS code, and selling price. The calculator stacks every import cost in order and tells you whether the margin survives. Here's what each piece means.

What is landed cost?

Landed cost is the total per-unit cost of getting an imported product to your warehouse or fulfillment center. It includes supplier cost, ocean or air freight, insurance, import duty, Merchandise Processing Fee, Harbor Maintenance Fee, brokerage fees, and any tariff overlays like Section 301. It does not include marketplace fees or outbound fulfillment — this calculator adds those separately so you can see the full picture.

What is the Merchandise Processing Fee (MPF)?

MPF is a U.S. Customs fee charged on most commercial imports. For formal entries, it's 0.3464% of the declared customs value, with a minimum of $32.71 and a cap of $634.62 per entry (FY2026 CBP rates). The minimum matters on small shipments — a $500 invoice still pays the full $32.71, raising effective per-unit cost on low-quantity test orders. Once your shipment value exceeds roughly $183,000, MPF caps out and the per-unit cost drops as quantity scales. The calculator models both the floor and the ceiling automatically.

How does Section 301 affect my import costs?

Section 301 tariffs are additional duties on top of the standard HTS base duty rate, applied to most goods imported from China. The overlay ranges from 7.5% to 25% depending on the product category, and is calculated on the declared customs value. If you're sourcing from Vietnam, India, Mexico, or most other countries, Section 301 generally doesn't apply. The origin scenarios table in the calculator shows exactly how the tariff difference plays out across your margin.

What is HMF (Harbor Maintenance Fee)?

Harbor Maintenance Fee is a 0.125% fee on the value of cargo imported through U.S. ports via ocean vessel. On a $2,125 shipment it adds about $2.66 — small, but it's a real line item. Air freight shipments are exempt. The calculator includes HMF by default for ocean shipments; uncheck the box if your goods arrive by air.

How do I look up my HTS code?

Use the Product or HTS lookup field at the top of the calculator for common product categories — it provides starter duty rates for items like phone cases, apparel, and electronics. For an official classification, use the USITC HTS Search. The HTS code determines your base duty rate and which Chapter 99 Section 301 overlay applies. If you're unsure, a licensed customs broker can classify your goods definitively.

Can I run multiple SKUs at once?

Yes. The batch tool below the main calculator accepts CSV input. Include columns for SKU, unit cost, quantity, freight, selling price, base duty rate, and additional tariff rate. It processes all rows and returns landed cost, profit per unit, and margin for each SKU. Use the "Use current row" button to load the main calculator's current inputs as a starting CSV row.

Does this replace a customs broker?

No. Import Math is a pre-purchase planning tool. It estimates costs for evaluation purposes but does not classify merchandise, issue customs rulings, verify country-of-origin claims, or advise on trade programs, exclusions, antidumping orders, or countervailing duties. For regulated goods, first-time importers, or any situation where compliance matters, a licensed customs broker is part of the cost of doing business.

Is Import Math free?

Yes. No account, no signup, no paywall. All platform-specific calculator pages and the batch SKU tool are free to use.