If you’ve ever ordered a gadget from abroad or run a small business that imports raw materials, you’ve probably been surprised by the final bill at customs. That’s because GST on imported goods isn’t just one tax — it’s layered on top of customs duty, and the way the two interact trips up even experienced buyers. This guide breaks down exactly how the calculation works, step by step, so you can estimate your landed cost before the shipment arrives.
What Counts as GST on Imported Goods?
Under India’s GST law, every import of goods is treated as an inter-state supply, which means it attracts Integrated GST (IGST) rather than the CGST/SGST split you’d see on a domestic purchase. In addition to IGST, most shipments also attract Basic Customs Duty (BCD) and a Social Welfare Surcharge (SWS). The confusing part is the order of operations: GST on imported goods is not calculated on the invoice value alone — it’s calculated on the invoice value plus the customs duty already added on top.
The Step-by-Step Calculation
Here’s the sequence customs officers actually use:
- Assessable Value (AV): The CIF value (Cost, Insurance, Freight) converted to INR at the applicable exchange rate.
- Basic Customs Duty (BCD): BCD rate × Assessable Value.
- Social Welfare Surcharge (SWS): Usually 10% of the BCD amount.
- IGST: IGST rate × (Assessable Value + BCD + SWS) — not just the assessable value.
- Total landed cost: Assessable Value + BCD + SWS + IGST.
So if you’re importing goods worth ₹1,00,000 with a 10% BCD and 18% IGST, the BCD is ₹10,000, the SWS is ₹1,000, and the IGST is calculated on ₹1,11,000 — not ₹1,00,000. That single detail is why so many first-time importers underestimate their final invoice.
Current IGST Slabs for Imports
IGST on imports generally falls into one of five slabs: 0%, 5%, 12%, 18%, or 28%, depending on the HSN classification of the goods. Electronics commonly attract 18%, apparel is typically 5% or 18% depending on value, and certain luxury items can attract rates as high as 40% once cess is added. Because rates change with budget announcements, it’s worth checking the current HSN-wise rate before you commit to an order, rather than assuming last year’s number still applies.
Can You Claim Input Tax Credit?
If you’re a registered business importing for resale or business use, the IGST paid at customs is generally available as Input Tax Credit (ITC), provided you have the Bill of Entry as documentation. BCD and SWS, however, are not creditable — they become part of your cost of goods. This is a meaningful planning point: two importers paying the same total invoice can end up with very different effective costs depending on whether they can recover the IGST component.
A Worked Example
Say you’re importing machine parts valued at ₹5,00,000 (CIF), with a 7.5% BCD rate and 18% IGST:
- BCD = 7.5% × ₹5,00,000 = ₹37,500
- SWS = 10% × ₹37,500 = ₹3,750
- IGST = 18% × (₹5,00,000 + ₹37,500 + ₹3,750) = 18% × ₹5,41,250 = ₹97,425
- Total landed cost = ₹5,00,000 + ₹37,500 + ₹3,750 + ₹97,425 = ₹6,38,675
Notice the IGST alone (₹97,425) is nearly as large as the BCD and SWS combined — a good reminder that GST on imported goods is usually the biggest single line item after the product cost itself.
Quick Tips Before You Import
- Always convert your invoice using the customs (not bank) exchange rate — it can differ slightly and change your assessable value.
- Check the correct HSN code before ordering; misclassification is one of the most common causes of GST disputes on imports.
- If you’re GST-registered, keep your Bill of Entry safe — it’s your proof for claiming IGST as input tax credit.
- Factor in the cascading calculation (duty-on-duty) when comparing an imported product’s price to a domestic alternative — the sticker price abroad is rarely the final cost.
FAQ: GST on Imported Goods
Is GST charged on top of customs duty? Yes — IGST is calculated on the assessable value plus BCD and SWS, not on the invoice value alone.
Can individuals (non-businesses) claim IGST back on personal imports? No, Input Tax Credit is only available to GST-registered businesses using the goods for business purposes.
Do all imported goods pay the same IGST rate? No — the rate depends on the HSN classification, ranging from 0% to 28% (plus cess on some luxury categories).
Running these numbers by hand for every shipment gets tedious fast, especially once you add multiple duty components. A GST Calculator can help you quickly work out the tax portion once you know your assessable value and applicable rate, and pairing it with a currency conversion at the correct rate gives you a realistic landed-cost estimate before you place the order. For more calculators like this, browse our full tools page or the CheckMatter blog for more finance guides.
Reference: for official rate schedules and rules, see the Central Board of Indirect Taxes and Customs (CBIC).