Customs duty calculator, Nigeria: the formula, worked through

No official customs duty calculator exists for Nigeria, so here is the formula: duty on CIF by HS code, the surcharge, CISS, the ECOWAS levy, VAT, worked through.

Nigeria Customs duty is not calculated from the supplier's invoice price alone.

For most commercial imports, Customs first establishes the Customs value — usually the CIF value:

Cost of goods + Insurance + Freight to Nigeria

That value is converted to naira using the Customs exchange rate, then the duty rate attached to your HS code is applied.

After that come the other applicable charges.

If you want to know what an import will cost before it leaves China, these are the numbers you need.

The Nigeria Customs duty formula #

For a normal dutiable import, start here:

CIF = FOB value + freight + insurance

Then calculate:

Nigeria Customs confirms that transaction value is the starting valuation method and that freight, insurance and certain other costs are added where they are not already included in the invoice price.

The Nigeria Tax Act 2025 keeps VAT at 7.5% and says the VAT value of imported goods includes the imported price plus taxes, duties and other import charges, together with costs such as transport and insurance to the point of entry.

That is why simply calculating:

supplier price × duty rate

is wrong.

Step 1: find the CIF value #

Suppose you buy electronics from China:

Goods/FOB: ₦3,000,000
Freight: ₦400,000
Insurance: ₦50,000

Your CIF is:

₦3,000,000 + ₦400,000 + ₦50,000 = ₦3,450,000

That ₦3.45 million is the starting point for the ad-valorem import-duty calculation.

If the supplier quoted CIF already, do not add freight and insurance twice.

Step 2: find the correct HS code #

The duty percentage comes from the product's HS code.

Nigeria's current CET framework uses the main tariff bands:

0%, 5%, 10%, 20% and 35%.

But that does not mean every product fits neatly into one of those numbers without further charges.

Nigeria's 2026 Fiscal Policy Measures revised parts of the Import Adjustment Tax list, National List, excise schedules and other tariff measures.

So search the actual product.

Nigeria Customs now has an official 2026 Tariff & CET lookup portal where you can search HS classifications and duty information.

Do not classify a product because:

“My supplier says the HS code is 8517.”

The supplier is exporting from China.

Nigeria Customs is clearing it in Nigeria.

Have your Nigerian clearing agent confirm the code before you open Form M.

Step 3: calculate import duty #

Assume the electronics in our example attract 20% duty.

CIF:

₦3,450,000

Duty:

₦3,450,000 × 20% = ₦690,000

That is the basic import duty.

It is not yet your complete Customs bill.

Step 4: add the 7% surcharge #

The surcharge is calculated on the import duty, not on the CIF value.

So:

₦690,000 × 7% = ₦48,300

Nigeria Customs' own published assessment example uses the same 7%-of-duty calculation.

A common mistake is calculating:

7% × ₦3.45 million

That is not the formula.

Step 5: add the ECOWAS levy #

The normal ETLS/ECOWAS levy commonly appearing on non-ECOWAS imports is:

0.5% of CIF

For our example:

₦3,450,000 × 0.5% = ₦17,250

Again, Customs' published worked examples show the levy calculated on CIF.

Step 6: the CISS versus 4% FOB issue #

This is the line where you should not rely on an old calculator.

Historically, Nigerian Customs assessments included:

CISS = 1% of FOB value

and official Customs examples show that calculation.

Then the Nigeria Customs Service Act 2023 introduced a funding charge of not less than 4% of FOB value.

Customs began implementing it in 2025, suspended it, brought it back, received another Finance Ministry suspension directive, and continued consultations.

Customs also stated that when the new 4% FOB structure takes effect, the 1% CISS is supposed to cease, rather than simply being added permanently on top of it.

By 2026, Customs' budget projections explicitly included revenue from 4% FOB collections, and exemptions have been announced for certain qualifying manufacturers, government projects, humanitarian imports and other categories.

So the practical rule is:

Do not calculate 1% CISS and 4% FOB together unless the actual Customs assessment for your entry does so under a current lawful arrangement.

Ask your licensed clearing agent:

“Is this entry being assessed under CISS or the 4% FOB/FCS charge?”

Then ask to see the assessment.

Do not accept:

“That's how Customs does it now.”

without the document.

Worked example using the 1% CISS structure #

Using:

FOB: ₦3,000,000
Freight: ₦400,000
Insurance: ₦50,000
CIF: ₦3,450,000
Duty rate: 20%

We get:

Import duty
20% × ₦3,450,000
= ₦690,000

7% surcharge
7% × ₦690,000
= ₦48,300

CISS
1% × ₦3,000,000
= ₦30,000

ETLS
0.5% × ₦3,450,000
= ₦17,250

VAT base:

₦3,450,000

• ₦690,000
• ₦48,300
• ₦30,000
• ₦17,250

= ₦4,235,550

VAT:

7.5% × ₦4,235,550

= ₦317,666

Total Customs taxes and charges in this example:

₦690,000 + ₦48,300 + ₦30,000 + ₦17,250 + ₦317,666

= approximately ₦1,103,216

That is before:

• terminal charges
• shipping-line charges
• clearing-agent fee
• storage
• container charges
• haulage to your warehouse

Customs duty is not the same thing as total clearing cost.

What if the 4% FOB charge applies instead? #

Using the same shipment:

4% of ₦3,000,000 FOB = ₦120,000

If that charge applies in place of the old 1% CISS, the calculation changes.

You would replace the ₦30,000 CISS line with the applicable ₦120,000 FOB charge.

The VAT base also changes because VAT on imported taxable supplies includes applicable import duties and charges.

Using that structure purely as an illustration:

CIF: ₦3,450,000
Duty: ₦690,000
Surcharge: ₦48,300
ETLS: ₦17,250
4% FOB: ₦120,000

VAT base:

₦4,325,550

VAT at 7.5%:

approximately ₦324,416

Total:

approximately ₦1,199,966

The difference is meaningful.

Which is exactly why you should not build your landed cost from an old screenshot.

Customs uses its own exchange rate #

Suppose the supplier invoice is in dollars.

Do not convert it using whatever USD/NGN rate your bank gave you when you bought the goods.

Nigeria Customs publishes its own reference exchange rates for Customs transactions.

Those rates move.

So your shipment can have:

Supplier/payment exchange rate: what it cost you to buy dollars or yuan.

Customs exchange rate: what Customs uses to convert the Customs value.

They are not necessarily the same.

For landed-cost planning, use each rate for the job it actually performs.

The yuan-to-naira guide explains the China payment side.

Do not hardcode today's Customs rate #

This is another mistake we see in spreadsheets.

Someone builds:

USD = ₦1,450

into an Excel sheet and uses it for the next six months.

Don't.

Customs' own exchange-rate page publishes the current reference rate and provides a currency converter.

Check it again when your declaration is being processed.

A change in the Customs rate changes your naira CIF.

Your naira CIF changes your duty.

That changes the surcharge, levy and VAT.

One exchange-rate move therefore runs through almost the entire assessment.

Can Customs reject your invoice value? #

Yes — but not simply because an officer feels your goods should cost more.

Nigeria Customs' current valuation guidance says the transaction value is the primary valuation method and Customs must follow the WTO/CET valuation methods in sequence.

Customs can test the truth and accuracy of the invoice and supporting documents, but its own guidance also says valuation should not be based on arbitrary or fictitious minimum values.

So keep evidence of the real transaction:

• commercial invoice
• payment evidence
• purchase order
• supplier correspondence
• freight invoice
• insurance
• packing list

If your supplier genuinely gave you a discount, keep evidence of the discount.

Do not respond to valuation problems by asking the Chinese supplier to manufacture a fake invoice.

PAAR is where the numbers start becoming real #

Before arrival, Customs processes your import documentation through the PAAR/declaration system.

That is where classification and valuation begin translating into an actual Customs assessment.

Your landed-cost estimate before ordering is still an estimate.

The Customs assessment generated for the real declaration is the amount that matters at clearance.

Our Apapa port clearing guide explains what happens after that.

Product levies can change the calculation completely #

The basic formula is not the whole tariff book.

Certain goods can attract:

• Import Adjustment Tax
• excise
• special levy
• vehicle levy
• environmental/Green Tax measures
• exemptions or concessions

The 2026 fiscal measures specifically changed several of these schedules.

So do not use the worked electronics example for:

a car

alcohol

tobacco

sugar

special industrial equipment

or another product with a specific fiscal treatment.

Use the exact HS code and current 2026 tariff entry.

What should you ask your clearing agent? #

Before paying your Chinese supplier, send:

Product description

Photo/specification

Proposed HS code

FOB/CIF value

Freight estimate

Then ask for this:

HS code: ___

Duty rate: ___%

IAT/product levy: ___

CIF: ₦___

Import duty: ₦___

Surcharge: ₦___

ETLS: ₦___

CISS or applicable FOB/FCS charge: ₦___

VAT: ₦___

TOTAL CUSTOMS ASSESSMENT: ₦___

Then separately ask:

Shipping line: ₦___

Terminal: ₦___

Agent fee: ₦___

Truck: ₦___

Now you have something useful.

Do not confuse Customs duty with clearing cost #

If Customs assesses:

₦4 million

that does not mean your container clears for ₦4 million.

After Customs you can still have:

shipping line + terminal + clearing agent + storage + transport.

That is why the Customs calculation belongs inside a bigger landed-cost calculation.

See our landed cost from China to Nigeria guide.

The short formula #

For a straightforward import:

1. FOB + Freight + Insurance = CIF

2. CIF × HS duty rate = Import Duty

3. Import Duty × 7% = Surcharge

4. CIF × 0.5% = ETLS where applicable

5. Add the currently applicable CISS/FOB Customs funding charge — do not blindly add both

6. Apply 7.5% VAT to the imported taxable value including the applicable duties and charges

Then add any product-specific tariff measures.

That gives you the Customs side.

After that, add the port, shipping line, clearing and haulage to get your actual landed cost.

And before you send a deposit to China, ask your clearing agent for the calculation using the real HS code.

If they cannot show you how they reached the number, get another quote.

Next, calculate the full landed cost from China to Nigeria.

Then read Form M for Nigerian importers.

And if you already have the supplier's product link, invoice, quantity and carton details, ChinaBridge can help you put the China cost and Nigerian Customs side into one calculation before the order moves.

First published 20 Sep 2026. Last checked 23 Sep 2026 by The ChinaBridge desk. Something here out of date? Tell us in the comments and we will fix it.