Cost of goods from China: what hides behind the invoice price

31.10.2026·6 min read·Delivery Pro China

The cost of goods from China is not just the invoice. Learn how to account for shipping, duties, VAT, banking costs, and defects. Build your calculation correctly.

In brief: The full cost of goods from China includes the purchase price, shipping, insurance, customs duty, VAT, banking costs for currency conversion and transfer, expenses for receiving, inspection, consolidation and packaging, defect losses, and the cost of working capital tied up during transit. Only by adding all these items together and dividing by the number of units do you arrive at a figure suitable for managing your margin.

Why comparing suppliers by invoice is misleading

Buyers who choose a supplier based on unit price make the same mistake: they compare a part with the whole. The invoice price is only a starting point. Two suppliers with a 5% difference on the invoice can produce opposite results in final cost if they differ in packaging, duty rate, defect rate, or payment terms.

Practice shows: the more complex the product and the longer the route, the greater the gap between the invoice and the actual cost per unit at the warehouse. For some product categories, this gap exceeds 40–60% of the purchase price.

What makes up the full cost of goods

Product price. The baseline figure. This includes the invoice, but also any additional payments to the supplier – for customization, labeling, or special packaging.

Shipping. Calculated from the supplier's warehouse in China to your warehouse in the destination country. On road routes, the price is driven by cargo density: light and bulky goods cost more per unit than dense ones. With air express, volumetric weight is used – the greater of the actual and calculated values is applied, so packaging dimensions directly affect the cost of delivery. Before comparing suppliers, check how each of them packages their goods.

Insurance. Usually calculated on the declared value of the cargo. A small item, but with regular shipments it accumulates.

Customs duty and VAT. Calculated on the customs value. The duty rate depends on the HS code, and different product lines from the same supplier may be subject to different rates. If you have not verified the HS code in advance, allow for a margin of error.

Banking costs. Currency conversion, bank commission for international transfer, exchange rate loss between the invoice date and the payment execution date. With multiple suppliers and monthly shipments, this item ceases to be insignificant.

Receiving, inspection, packaging. If goods are received at an intermediate warehouse in China, counted, checked against the specification, and repackaged – these operations have a cost. Failing to account for them means shifting hidden costs into your margin.

Consolidation. When you ship goods from several suppliers in one consignment, consolidation costs need to be allocated across SKUs. The usual method is proportional to weight or volume. If this is not done, some items will appear artificially profitable at the expense of others.

Defect and mismatch losses. Even with quality control at the warehouse, some goods turn out to be non-compliant with the specification. A realistic defect rate is a separate line in the model. Ignoring it means receiving surprises after every delivery.

The cost of money in transit: the item most often overlooked

You pay the supplier at the time of shipment or earlier. The goods are in transit for several weeks. During all this time, the money is not working.

If the shipment is financed with borrowed funds – they have a direct cost expressed in annual percentage. If financed with own funds – there is an opportunity cost: what that money could have earned in the same period.

With a transit time of 25–40 days and large shipments, this is not an abstract category. The formula is straightforward: multiply the amount of frozen funds by the cost of capital as an annual percentage, divide by 365, and multiply by the number of transit days. Add the result to the cost table.

How to build a cost table

A structure that can be maintained in a standard spreadsheet:

By completing such a table for two suppliers, you are comparing real figures, not invoices. A supplier with a lower purchase price often loses out once packaging volume, a different duty rate, and a higher historical defect rate are added to the model.

Common mistakes in calculating cost of goods

• Calculating shipping from port to warehouse while forgetting the inland leg in China from the factory to the port or consolidation warehouse.
• Using the conversion rate as of the calculation date rather than the actual payment date.
• Allocating consolidation costs evenly across the number of SKUs rather than by weight or volume.
• Not building in defect losses because "the supplier is reliable".
• Comparing supplier quotes without accounting for the fact that different packaging conditions change the shipping rate.

Frequently asked questions

How should volumetric weight be accounted for when calculating cost of goods? Volumetric weight is relevant for air express: if the calculated weight based on dimensions exceeds the actual weight, the rate is applied to the calculated weight. Before shipping by air, confirm the exact packaging dimensions with the supplier – sometimes a small change to the box reduces the volumetric weight and the cost of delivery per unit. On road routes, volumetric weight does not apply; the price is determined by cargo density.

Should VAT be included in the cost of goods if I reclaim it? If your business is a VAT payer and reclaims it from the tax authority, VAT on imports is temporarily frozen working capital, not a final expense. Include it in the "cost of money in transit" item for the period between payment and reclaim. If there is no reclaim – it is a full cost item.

How should consolidation costs be allocated across different SKUs in one shipment? The most common method is proportional to the volume or weight of each product line. This way, larger and heavier goods receive a greater share of the costs, which reflects their actual consumption of warehouse space and labor.

What defect rate should be built into the model? This depends on the product category and the history with a specific supplier. If you have data from several shipments – use the actual rate. If you are starting with a new supplier, a conservative reference point is 2–5% for industrial goods, higher for textiles, electronics, and fragile items. Adjust as data accumulates.

This article is relevant for importers working with Chinese suppliers through official import channels. Verify specific duty rates and shipping tariffs for your product line and route – they are subject to change.

Start with one test shipment and compare the result on a real cargo.