Buying products from an overseas supplier is only the first expense. A realistic budget must account for product procurement, international shipping, customs duties and taxes, clearing, local delivery, packaging, advertising, payment charges and the working capital required to keep the business operating after the first shipment arrives.

For Nigerians sourcing products from markets such as China, the most useful approach is to calculate the landed cost of every product before placing an order. The Nigeria Customs Service provides an official tariff and Common External Tariff lookup system where importers can check HS classifications and applicable duty information.

Here is how the cost structure works.

1. Product Procurement Cost

The first and most obvious expense is the price paid to the supplier.

This includes the unit price multiplied by the number of units purchased. If a supplier sells a product for $3 and the order contains 100 units, the product cost is $300 before shipping and other charges.

But the supplier's quoted unit price is not necessarily the final procurement cost.

You may also encounter:

The safest approach is to request a complete quotation before making payment. The quotation should clearly state the product specification, quantity, unit price, total product value and delivery terms.

Do not calculate profitability from the supplier's unit price alone.

2. International Shipping

Shipping is one of the largest variables in mini-importation.

Your shipping cost can depend on the product's weight, volume, destination, shipping method and the logistics company handling the shipment. Air freight is generally used when speed is important, while sea freight can be more appropriate for larger or heavier shipments.

Shipping quotations may also be affected by additional surcharges. For example, Maersk announced peak-season surcharges on certain China, Hong Kong and Taiwan to Nigeria trade lanes in 2026.

This is why you should obtain a current freight quotation rather than relying on an old price from another importer.

Your calculation should therefore separate:

Product cost + international freight + applicable shipping surcharges

If you are using a freight forwarder, ask whether the quoted price includes destination charges, customs-related expenses and final delivery or whether those costs will be billed separately.

3. Customs Duties and Taxes

Customs is where many new importers underestimate their total expenditure.

The applicable duty depends on the classification of the imported product. Nigeria Customs provides an official Tariff and CET Lookup Portal for checking HS codes, duty rates and related tariff information.

The exact amount cannot responsibly be stated as one percentage for every mini-importation business because different products can fall under different tariff classifications.

In addition to customs duty, imported goods can attract VAT and other statutory charges. Nigeria Customs guidance states that applicable duties and taxes must be paid before qualifying shipments are released.

DHL's current Nigeria import guidance also notes that even shipments qualifying for zero duty can still incur VAT, customs processing fees, port handling, storage and other statutory charges.

Before buying inventory, identify the correct HS code and check the current customs treatment for the product.

That single step can prevent a profitable-looking product from becoming unprofitable after arrival.

4. Customs Clearing and Documentation

If your shipment requires formal customs clearance, clearing-related expenses must be included in the business budget.

Depending on the shipment and arrangement, expenses can involve customs processing, documentation, handling and the services of a customs representative or logistics provider.

Nigeria Customs also operates digital systems intended to streamline trade and e-commerce clearance. Its Simplified Customs Advance Declaration System, for example, supports advance declarations, tracking and electronic payment for applicable customs charges.

Do not assume that the amount paid to your supplier or freight company automatically covers every Nigerian clearance expense.

Ask for a written breakdown.

5. Local Delivery

The product is not yet ready for sale simply because it has arrived in Nigeria.

You still need to move the inventory from the port, airport, warehouse or clearing location to your storage location or directly to customers.

For a small business, this may involve:

These expenses should be recorded separately from international freight.

6. Packaging and Product Preparation

Packaging is another cost that is easy to ignore when calculating profit.

Depending on the product, you may need branded bags, cartons, labels, protective wrapping, thank-you cards or other packaging materials.

You may also need to inspect products, remove damaged units, assemble products or prepare them for sale.

The cost per unit can appear small, but it becomes significant when multiplied across hundreds of products.

7. Initial Social Media Advertising

A mini-importation business can have excellent products and still struggle to generate sales if potential customers never see them.

Social media advertising therefore belongs in the launch budget.

Meta allows advertisers to set either daily or lifetime budgets, with advertising costs varying according to factors such as campaign objective and market conditions. Meta recommends giving campaigns enough time to gather performance data rather than treating advertising as a one-day experiment.

Instead of asking, "How much should I spend on Facebook or Instagram ads?" start with a more useful question:

How much can I spend to acquire one customer while remaining profitable?

If your profit before advertising is ₦5,000 per sale, spending ₦4,500 to acquire that customer leaves little room for other operating costs.

Your advertising budget should therefore be connected to your product margin, not selected randomly.

8. The Complete Landed-Cost Calculation

The most important calculation in mini-importation is the landed cost.

A practical formula is:

Landed Cost = Product Procurement + International Shipping + Customs Duties and Taxes + Clearing Charges + Local Delivery + Other Import Costs

Then calculate:

Cost Per Unit = Total Landed Cost ÷ Number of Saleable Units

This number should determine your selling price.

For example, if 100 units are ordered but five arrive damaged or unusable, your cost per saleable unit should be calculated using 95 units, not 100.

That gives you a more realistic picture of profitability.

9. Keep Advertising Separate From Landed Cost

Advertising is a business acquisition expense, not an import expense.

Keeping it separate makes your financial records easier to understand.

Your overall launch calculation can therefore be divided into two parts:

Import Cost: Product + freight + customs + clearing + local logistics

Sales Cost: Advertising + packaging + payment charges + customer delivery + other selling expenses

The final profit is what remains after both categories are deducted from sales revenue.

10. Do Not Import Before Checking the Product

Cost calculation should begin before payment to the supplier.

First verify that the product is legally importable. Nigeria Customs publishes an updated import prohibition list, and its tariff portal also provides tools for checking import restrictions.

Then verify the HS classification, calculate the likely customs exposure, obtain a current freight quotation and determine your landed cost.

Only after these figures are known should you decide how many units to purchase.

The Bottom Line

Mini-importation does not require you to guess how much money you need.

The better approach is to itemize every cost from the supplier's warehouse to the customer's hands.

Start with the product price. Add international freight. Check the correct customs classification and applicable duties and taxes. Include clearing, local transportation, packaging and advertising. Then divide the total cost by the number of saleable units.

The result is your real cost per product.

That figure is more important than the supplier's cheap unit price, because it tells you whether the product can actually make money in the Nigerian market.