Import Duty Calculator
Enter customs value and duty rate to estimate import duty. Supports ad valorem (% of customs value) and fixed duty amounts. Planning estimate only — actual duty is determined by the customs authority based on HS code, country of origin and applicable trade agreements.
Enter customs value and applicable duty rate to estimate import duty. Use for budget planning only — actual duty is determined by customs authorities based on HS code, origin, and any applicable trade agreements.
Same currency as your duty rate applies to
Ad valorem rate from your HS code tariff schedule
Formula
Import Duty = Customs Value × Duty Rate ÷ 100 | (ad valorem)
An ad valorem duty is calculated as a percentage of the customs value. Most import tariffs use this method. Some commodities attract specific duties (fixed per unit or per kg) or compound duties (ad valorem plus specific). The duty rate is found in the importing country's tariff schedule against the commodity HS code.
Worked Example
Electronics shipment: Customs value USD 10,000 · Duty rate 5%:
Import duty = USD 10,000 × 5% = USD 500
Total (goods + duty) = USD 10,000 + USD 500 = USD 10,500
In practice, the customs authority determines the dutiable value, which may differ from invoice value. Freight and insurance costs are typically included in CIF customs value. Use the Customs Value Calculator to compute CIF value before applying the duty rate.
Frequently Asked Questions
What this calculator does
The Import Duty Calculator estimates the duty payable on imported goods from the customs value and the applicable duty rate. Enter your goods value, international freight, and insurance to arrive at the CIF customs value, then apply an ad valorem duty rate (percentage) or fixed duty amount. The result gives you the estimated duty payable at the border.
This is a planning estimate — not an official duty assessment. Actual duty is determined by the customs authority based on the HS code classification, country of origin, applicable trade agreements, and whether anti-dumping or countervailing duties apply.
Worked example
Importing ceramic tableware from Vietnam to the UK
| Product value (FOB) | £3,200 |
| Sea freight | £480 |
| Insurance | £20 |
| CIF customs value | £3,700 |
| Duty rate (HS 6912.00 — MFN rate) | 12% |
| Import duty payable | £3,700 × 12% = £444 |
If Vietnam had an active FTA with preferential rates, the duty might be 0% or a reduced rate. Always check whether preferential origin applies before assuming the MFN rate.
Import duty vs VAT/GST vs other fees
Import duty is a tariff levied by the destination country on goods crossing the border. It is based on the HS code and the customs value, and the rate depends on the country of origin and any applicable trade agreements.
Import VAT or GST is a consumption tax applied on top of the customs value plus the duty amount. In the UK this is 20%; in Australia GST is 10%. VAT-registered businesses can usually reclaim this; consumers cannot.
Other fees include customs broker charges, terminal handling, port storage, and delivery. These are not calculated by this tool but form part of the total landed cost. Use the Landed Cost Calculator for the full picture.
Why final duty depends on more than just the rate
- •HS classification — the tariff code determines which duty rate line applies. Different codes can carry very different rates even for similar products.
- •Customs value — most countries use CIF (cost + insurance + freight). The US uses FOB. Getting the value base wrong changes the duty amount.
- •Country of origin — the manufacturing origin determines whether MFN, preferential, or punitive rates apply.
- •Trade agreements — FTA preferential rates can reduce or eliminate duty entirely, but require valid proof of origin documentation.
- •Anti-dumping duties — additional duties on specific products from specific countries can add 10–60% on top of the standard rate.
Common mistakes to avoid
- ×Using the FOB value for duty in a CIF-basis country (or vice versa) — this under/overstates the customs value.
- ×Applying the wrong HS code — even one digit difference can move you from 0% to 12% duty.
- ×Claiming FTA preference without valid origin documentation — triggers audits and back-duty demands.
- ×Forgetting anti-dumping duties — these are not shown in basic tariff lookups and can exceed the standard duty rate.
- ×Confusing duty with total import charges — duty is one component; VAT, broker fees and handling are additional costs.
Use this in your workflow
Start by calculating CIF customs value with the Customs Value Calculator, apply the duty rate here, then add VAT/GST in the Duties and Taxes Estimate Calculator. Feed results into the Landed Cost per Unit Calculator for full import cost. Browse all Online Business Calculators.
When to use this calculator
- →Budgeting import duty before placing a purchase order or requesting a landed cost
- →Comparing duty exposure for different sourcing origins or trade agreement scenarios
- →Checking a freight forwarder or broker duty estimate against your own calculation
- →Modelling the landed cost impact of duty rate changes under tariff review scenarios
HS Lookup Beta — Tariff Provider Coverage
The HS Code Duty Calculator includes Lookup Beta, which assists with duty rate lookups for supported markets. Support levels below. All markets support manual rate entry as fallback.
| Market | Support Mode | Duty | VAT/GST | Special Duty | Source | Confidence | Reviewed | Fallback |
|---|---|---|---|---|---|---|---|---|
| UK | Automated beta | API lookup | 20% auto | Partial | GOV.UK Trade Tariff API | High | 2026-06-26 | Yes |
| EU | Source-assisted beta | Source-assisted | Member-state VAT | AD/CVD/safeguard | EU TARIC | Medium | 2026-06-26 | Yes |
| US | Dataset-assisted beta | Base HTS only | No federal VAT | 301/Ch99/AD-CVD | USITC HTS | Low-Medium | 2026-06-26 | Yes |
| Singapore | Rule-assisted | Dutiable categories | GST 9% auto | Dutiable goods | Singapore Customs | High | 2026-06-26 | Yes |
| UAE | Source-assisted | Manual fallback | VAT 5% auto | Exemptions warning | UAE Customs | Low | 2026-06-26 | Yes |
| Saudi Arabia | Source-assisted | Manual fallback | VAT 15% auto | Exemptions warning | ZATCA | Low | 2026-06-26 | Yes |
| Australia | Source-assisted | Manual fallback | GST 10% auto | FTA/origin warning | ABF / ATO | Low | 2026-06-26 | Yes |
| Canada | Source-assisted | Manual fallback | GST/HST/PST | CPTPP/CUSMA | CBSA / CARM | Low | 2026-06-26 | Yes |
| Japan | Source-assisted | Manual fallback | 10%/8% | RCEP/EPA | Japan Customs | Low | 2026-06-26 | Yes |
| South Korea | Source-assisted | Manual fallback | VAT 10% auto | FTA/excise | Korea Customs | Low | 2026-06-26 | Yes |
What this means
UtilityPilot combines automated beta lookups, dataset-assisted checks, rule-assisted tax logic and source-assisted manual fallback for planning landed cost before shipment. It is not a customs ruling and does not replace official customs classification or broker advice. Always verify duty rates with a licensed customs broker.
Broker verification required
Duty rates change, trade-defence measures are company-specific, and preferential rates require valid proof of origin. Use these estimates for budgeting only. Official duty is determined by the relevant customs authority.
Related calculators
Related guides
How HS classification determines duty rates, origin and trade agreements explained with worked examples.
How import duty fits into the total landed cost formula alongside freight, insurance and VAT.
Customs rules for low-value parcels entering the EU — de minimis changes and IOSS.
Important note
This calculator provides estimates based on the values you enter. It does not look up official tariff rates. Actual duty liability is determined by the customs authority of the importing country based on HS classification, origin, applicable trade agreements, and customs value. Always confirm duty rates with a licensed customs broker or via your country’s official tariff database.
Last updated: July 2026