Tariff Calculator

A tariff calculator turns declared values, quantities, and tariff rates for one or more products into the import duty, dutiable value, and total landed cost for each line item and for the shipment as a whole. All numeric fields accept decimals, fractions such as 3/4, mixed numbers such as 5 1/2, and values with commas or dollar signs, which are stripped automatically before calculation.

• A Tariff Scenario preset applies a historical or regional rate to every product at once, or a custom rate can be set per product instead. Presets include US Baseline 2024 at an average 3.4 percent, US-China Trade War 2018-2019 at 25 percent, US Reciprocal Tariffs 2025 at a representative 10 to 50 percent range, Smoot-Hawley 1930 at an average 20 percent, the EU Common External Tariff at 5.1 percent, and the UK Global Tariff Post-Brexit at 5.7 percent.
• Currency sets the symbol shown in every output value; USD, EUR, GBP, CAD, AUD, JPY, and CNY are supported.
• Each product line needs a Product Name, a Declared Value, a Quantity, and a Tariff Rate, which a scenario preset can fill in automatically. Multi-product shipments are supported, with one row per product.

Settings hold the FOB and CIF valuation methods, an Insurance Rate based on declared value, a flat Freight / Shipping Cost, and a flat Handling / Brokerage Fee applied after the tariff calculation, plus a step-by-step breakdown that shows the formulas and substituted values behind every result line.

Under FOB valuation, dutiable value equals declared value multiplied by quantity. Under CIF valuation, freight and insurance are folded into the dutiable value before the tariff rate is applied: dutiable value equals declared value multiplied by quantity, plus the flat freight cost, plus the insurance amount, where the insurance amount equals declared value multiplied by quantity multiplied by the insurance rate divided by 100. The tariff amount for each product equals its dutiable value multiplied by the tariff rate divided by 100. Landed cost per product equals dutiable value plus tariff amount plus a share of the handling fee divided across products. The shipment summary totals every product and reports the effective tariff rate, the combined tariff amount as a percentage of total declared value, which will differ from the nominal tariff rate whenever CIF valuation, insurance, or a handling fee is in play.

Five units of a product are declared at $2,000 each, under CIF valuation with a 10 percent tariff rate, a 1 percent insurance rate, $300 flat freight, and a $50 handling fee. The insurance amount is 2,000 x 5 x 1 / 100 = $100, so dutiable value is (2,000 x 5) + 300 + 100 = $10,400. The tariff amount is 10,400 x 10 / 100 = $1,040, and landed cost is 10,400 + 1,040 + 50 = $11,490. The effective tariff rate, the $1,040 tariff against the $10,000 total declared value, comes to 10.4 percent, slightly above the nominal 10 percent rate because freight and insurance were added to the base before the rate was applied.

Import duty calculations affect procurement decisions, pricing strategies, and supply chain planning across industries and trade corridors. Below are specific scenarios where tariff modeling provides actionable cost visibility.

• Procurement Planning: Compare landed costs of sourcing the same component from two countries with different tariff rates. Both products, each with its own rate, show which origin delivers a lower total cost after duties, freight, and insurance.
• Trade Policy Analysis: Model the cost impact of proposed tariff changes by switching between scenario presets. Compare the US Baseline 2024 preset against the US-China Trade War preset to quantify how a rate increase from 3.4 percent to 25 percent affects a product line's total cost.
• Customs Brokerage: A multi-product commercial invoice carries varying tariff classifications and rates. The per-item duty breakdown and the shipment-level summary support customs declarations and a check of broker invoices against independently calculated figures.
• E-commerce Import Costing: Estimate the total landed cost of overseas inventory purchases before placing an order. Product values, shipping fees, and the applicable tariff rate together give the true per-unit cost that retail pricing must recover.
• Academic Research: Study historical trade regimes by loading the Smoot-Hawley 1930 preset alongside the modern US Baseline. Apply both to the same basket of goods to illustrate how effective tariff rates have shifted over time.
• Supply Chain Diversification: Evaluate the financial incentive to shift manufacturing from a high-tariff origin to a lower-tariff one. Identical products in two rows with different tariff rates, one per sourcing country, put the resulting landed costs side by side.