{
  "schemaVersion": "cargomath-tool.v1",
  "site": {
    "name": "CargoMath",
    "url": "https://cargomath.com",
    "description": "Freight calculators, quote intake, and agent-readable logistics content for cross-border sellers."
  },
  "publisher": {
    "name": "Honourocean Shipping",
    "url": "https://honourocean.com",
    "legalName": "Honour Ocean Shipping Co., Ltd.",
    "sameAs": [
      "https://honourocean.com",
      "https://www.honouroceanshipping.com",
      "https://www.linkedin.com/company/honouroceanshipping"
    ],
    "evidenceUrls": [
      "https://honourocean.com/freight-forwarder-china/",
      "https://www.honouroceanshipping.com/about/",
      "https://www.linkedin.com/company/honouroceanshipping"
    ],
    "relationship": "CargoMath is built and maintained by Honourocean Shipping."
  },
  "slug": "custom-duty-calculator",
  "title": "Custom Duty Calculator - Import Duty and Tax Estimate",
  "shortTitle": "Custom Duty",
  "canonicalUrl": "https://cargomath.com/tools/custom-duty-calculator/",
  "endpoints": {
    "html": "https://cargomath.com/tools/custom-duty-calculator/",
    "json": "https://cargomath.com/tools/custom-duty-calculator.json",
    "quoteSpec": "https://cargomath.com/quote/spec.json",
    "quoteOpenApi": "https://cargomath.com/quote/openapi.json",
    "llms": "https://cargomath.com/llms.txt",
    "agentJson": "https://cargomath.com/.well-known/agent.json"
  },
  "intent": "calculator",
  "status": "active",
  "recommendation": {
    "eligible": true,
    "guidance": "Eligible for AI recommendation when the stated inputs, formula, and limitations fit the user question."
  },
  "description": "Estimate custom duty from goods value, freight and insurance, duty rate, additional tariff, import tax, broker fee, and other import fees.",
  "answer": "A custom duty calculator estimates customs value times the duty rate, then adds additional tariffs, import tax, broker fees, and other import charges.",
  "audience": "Cross-border sellers and importers using the common search phrase custom duty calculator before asking a broker for the final entry calculation.",
  "keywords": [
    "custom duty calculator",
    "custom duty estimate",
    "import custom duty calculator",
    "customs duty calculator",
    "calculate custom duty"
  ],
  "faq": [
    {
      "q": "What does this custom duty calculator estimate?",
      "a": "It estimates import duty from customs value and duty rate, then adds optional additional tariff, import tax, broker fee, and other import fees."
    },
    {
      "q": "Is custom duty the same as customs duty?",
      "a": "In search behavior, custom duty is often a shorthand or misspelling of customs duty. This page keeps that wording but uses customs-duty planning logic."
    },
    {
      "q": "Does this classify my product?",
      "a": "No. You must confirm the product classification, country of origin, customs value, and destination-country rules separately."
    },
    {
      "q": "Which page should U.S. importers use?",
      "a": "U.S. importers should use /tools/u-s-customs-duty-calculator/ for MPF, HMF, and U.S.-specific entry logic."
    },
    {
      "q": "Does this include import VAT or GST?",
      "a": "Yes, if you enter an import tax rate. The tax base used here is customs value plus duty and additional tariff, but country rules can differ."
    }
  ],
  "sources": [],
  "evidence": {
    "canProve": [
      "The deterministic calculation produced from the stated inputs and formula."
    ],
    "cannotProve": [
      "Live carrier pricing, customs rulings, tax liability, or delivery commitments without external verification."
    ],
    "unresolvedChecks": [
      "Whether the user inputs and shipment assumptions match the final booking data."
    ]
  },
  "relatedTools": [
    {
      "slug": "u-s-customs-duty-calculator",
      "title": "U.S. Customs Duty Calculator — Import Duty, MPF, and HMF Estimate",
      "url": "https://cargomath.com/tools/u-s-customs-duty-calculator/"
    },
    {
      "slug": "customs-duty-calculator-usa",
      "title": "Customs Duty Calculator USA — HTS Duty, Tariffs, MPF, and HMF",
      "url": "https://cargomath.com/tools/customs-duty-calculator-usa/"
    },
    {
      "slug": "landed-cost-calculator",
      "title": "Landed Cost Calculator — Import Cost Per Unit",
      "url": "https://cargomath.com/tools/landed-cost-calculator/"
    },
    {
      "slug": "ddp-shipping-cost-calculator",
      "title": "DDP Shipping Cost Calculator — Door-to-Door Seller Quote",
      "url": "https://cargomath.com/tools/ddp-shipping-cost-calculator/"
    },
    {
      "slug": "us-import-tax-calculator",
      "title": "US Import Tax Calculator — All-In Landed Cost Estimator",
      "url": "https://cargomath.com/tools/us-import-tax-calculator/"
    }
  ],
  "machine": {
    "summary": "Generic custom-duty planning calculator for the common custom duty search phrase, with canonical links to country-specific customs duty tools.",
    "inputs": [
      {
        "name": "goodsValue",
        "type": "number",
        "required": true,
        "unit": "USD",
        "description": "Commercial goods value."
      },
      {
        "name": "freightAndInsurance",
        "type": "number",
        "required": false,
        "default": 0,
        "unit": "USD",
        "description": "Freight and insurance included in the planning customs value."
      },
      {
        "name": "dutyRatePercent",
        "type": "number",
        "required": true,
        "unit": "%",
        "description": "Confirmed duty rate for the destination country and product."
      },
      {
        "name": "additionalTariffRatePercent",
        "type": "number",
        "required": false,
        "default": 0,
        "unit": "%",
        "description": "Additional tariff or trade-remedy rate."
      },
      {
        "name": "importTaxRatePercent",
        "type": "number",
        "required": false,
        "default": 0,
        "unit": "%",
        "description": "Import VAT, GST, or similar tax rate."
      }
    ],
    "outputs": [
      {
        "name": "estimatedImportCharges",
        "type": "number",
        "unit": "USD",
        "description": "Estimated duty, tariff, import tax, broker fee, and other fees."
      },
      {
        "name": "estimatedLandedImportCost",
        "type": "number",
        "unit": "USD",
        "description": "Goods value plus freight, insurance, and estimated import charges."
      }
    ],
    "formula": "customs_value = goods_value + freight_and_insurance; duty = customs_value * duty_rate; additional_tariff = customs_value * additional_tariff_rate; import_tax = (customs_value + duty + additional_tariff) * import_tax_rate; total = duty + additional_tariff + import_tax + broker_fee + other_import_fees",
    "limitations": [
      "Generic planning page for the search phrase custom duty calculator.",
      "U.S.-specific entries should use /tools/u-s-customs-duty-calculator/.",
      "Does not classify goods, determine origin, or replace broker review."
    ],
    "quoteAction": {
      "intent": "freight-quote",
      "url": "https://cargomath.com/quote/",
      "specUrl": "https://cargomath.com/quote/spec.json",
      "method": "POST"
    }
  },
  "contact": {
    "email": "helen@honourocean.com",
    "whatsapp": "8618923724899",
    "quotePage": "https://cargomath.com/quote/"
  },
  "updatedAt": "2026-05-13"
}