How to Import Indonesian Steam Coal from Indonesia: A Practical Guide for International Buyers

Indonesia remains one of the most important sources of thermal coal for international power plants, cement factories, industrial boilers, manufacturing facilities, and commodity traders. According to Indonesia’s Ministry of Energy and Mineral Resources, approximately 514 million tonnes of coal produced in 2025 were allocated to export markets.

However, importing coal is not simply a matter of requesting a price per metric tonne. A successful transaction requires the buyer to define the correct coal specification, verify the legal supply chain, appoint an independent surveyor, agree on a clear pricing formula, choose an appropriate shipment term, and prepare the import documents required by the destination country.

This guide explains the practical steps international buyers should follow when sourcing Indonesian steam coal.

1. Understand the Coal Grade You Need

The first step is to determine which coal specification is compatible with your boiler, power plant, cement kiln, or industrial process.

International buyers often search for “low calorie coal” or “high calorie coal.” The more accurate technical expression is lower or higher calorific value coal.

Indonesia Export Center currently receives inquiries for Indonesian thermal coal in several GAR ranges, subject to mine availability, stockpile conditions, production batches, loading location, and final seller confirmation.

Low-Calorific-Value Coal

Buyers seeking a lower acquisition cost may consider products covered by the Low Calorie Coal GAR 4200–5000 Supplier category.

Typical inquiry ranges include:

GAR 4200–4400 kcal/kg
GAR 4800–5000 kcal/kg

This category is frequently considered for industrial boilers, general manufacturing, cement production, and power-generation facilities designed to handle coal with higher moisture levels.

The commercial advantage may be a lower price per metric tonne. However, buyers should calculate the delivered cost per usable unit of energy, not only the price per tonne.

High-Calorific-Value Coal

Buyers requiring a higher heat value may submit inquiries through the High Calorie Coal GAR 5300–6600 Supplier category.

Typical inquiry ranges may include:

GAR 5300–5500 kcal/kg
GAR 5600–5800 kcal/kg
GAR 5800–6000 kcal/kg
GAR 6000–6500 or other specifications subject to current mine availability

Higher-calorific-value coal can reduce the quantity of coal required to produce a given amount of heat, although actual plant performance also depends on boiler design, combustion controls, coal sizing, moisture, ash characteristics, and operating conditions.

The availability of coal near the upper end of the GAR 5300–6600 range must always be confirmed using the latest mine data and Certificate of Analysis.

2. Do Not Compare GAR and NAR as Identical Values

One of the most common mistakes in coal purchasing is comparing calorific values reported on different bases.

GAR means Gross Calorific Value on an As-Received basis. It includes the effect of the coal’s moisture in the condition in which the cargo is received.

NAR means Net Calorific Value on an As-Received basis. NAR is normally lower than GAR because it accounts for the energy required to evaporate water during combustion.

ISO 1928:2025 establishes a method for determining gross calorific value. It also explains the distinction between gross heat measurement and the net heat available under practical combustion conditions.

A buyer should never compare:

GAR with NAR;
As-Received with Air-Dried Basis;
Air-Dried Basis with Dry Basis; or
a preliminary mine analysis with a final loading-port analysis

without an agreed conversion method.

The purchase contract should specify the reporting basis for every parameter.

3. Prepare a Complete Coal Specification

A serious Request for Quotation should contain more than the required GAR value.

At a minimum, the buyer should specify:

Parameter	Information to State
Calorific value	Required GAR or NAR in kcal/kg
Total moisture	Maximum percentage, As-Received basis
Inherent moisture	Maximum percentage and analysis basis
Ash content	Maximum percentage and analysis basis
Total sulfur	Maximum percentage and analysis basis
Volatile matter	Required range and analysis basis
Fixed carbon	Required range and analysis basis
HGI	Minimum or acceptable range
Coal size	ROM, crushed, screened, or required millimetres
Quantity	Trial cargo, spot cargo, monthly supply, or annual contract
Delivery term	FOB barge, FOB mother vessel, CFR, or CIF
Destination	Country and destination port
Shipment period	Required laycan or delivery month

ISO 589 describes recognized methods for determining total moisture in hard coal. The applicable laboratory method and reporting basis should be stated in the contract.

The buyer should also establish contractual values for:

typical specification;
guaranteed specification;
rejection limits;
price adjustments or penalties; and
the final laboratory whose results will be binding

Without these provisions, even a genuine cargo may lead to a commercial dispute.

4. Send a Professional RFQ or Letter of Intent

A supplier cannot prepare an accurate offer if the inquiry only asks, “What is your coal price?”

Coal prices depend on quality, mine location, loading point, shipment quantity, barge or vessel size, laycan, payment method, freight conditions, and current stock availability.

A professional inquiry should include:

Buyer company information

Full legal company name
Registered address and country
Company profile
Business registration or import licence
Authorized contact person
Corporate email address

Purchase requirement

Required GAR or NAR
Complete technical specification
Quantity per shipment
Monthly or annual quantity
Destination port
Preferred Incoterm
Target shipment date
Preferred payment method
Inspection requirements

Indonesia Export Center recommends that serious buyers provide an official LOI, company profile, required GAR, required quantity, destination, delivery scheme, payment preference, and supporting documents so that seller availability can be checked properly.

5. Verify the Supplier and the Legal Coal Source

The company communicating with the buyer may be a mine owner, licensed coal trader, marketing representative, sourcing company, or export partner. These parties do not necessarily have the same legal role.

Before signing a contract or transferring money, request documentation that identifies:

the legal contractual seller;
the mine or stockpile source;
the party holding the relevant mining or coal trading permit;
the registered exporter;
the party receiving payment;
the loading port or anchorage;
the appointed surveyor; and
the party responsible for Indonesian export clearance

The bank beneficiary should match the contractual seller or another party whose payment role is clearly explained and documented in the contract.

Important Indonesian Regulatory Update for 2026

Indonesia introduced Ministry of Trade Regulation No. 15 of 2026 concerning the export of strategic natural-resource coal commodities. The regulation took effect on 1 June 2026.

It requires regulated coal exports to meet registered-exporter requirements and undergo technical verification or tracing by an appointed surveyor. The resulting Surveyor Report is used as a supporting customs document for the Indonesian export declaration.

During the 2026 transition period, existing registered coal exporters and Surveyor Reports are used for exports routed through the designated state-owned export entity. The regulation states that coal exports after 31 December 2026 may only be carried out by the designated BUMN Export.

Because export regulations can change, buyers should request written confirmation of the current export structure before concluding each transaction.

6. Review the Seller’s Offer Carefully

A proper coal offer should clearly state:

Seller’s legal name
Product and origin
Mine or stockpile location
Complete typical specification
Guaranteed specification
Rejection limits
Quantity and tolerance
Price and currency
Price basis or index reference
Loading point
Delivery term
Laycan
Loading rate
Demurrage and despatch
Inspection company
Quantity-determination method
Quality-determination method
Payment term
Offer validity
Required documents

Avoid accepting an offer that only states a GAR value and a price.

The contract should explain whether the price is fixed or linked to an agreed index. It should also specify how the price will be adjusted if the final calorific value, sulfur, ash, or moisture differs from the contractual reference.

7. Appoint an Independent Surveyor

A preliminary Certificate of Analysis is useful for evaluating an offer, but it should not automatically be treated as the final cargo quality.

The buyer should appoint or mutually approve an independent inspection company to supervise:

stockpile condition;
sampling during loading;
sample preparation and sealing;
laboratory analysis;
draft survey;
quantity determination;
vessel-hold cleanliness;
loading progress; and
final cargo documentation

ISO 18283:2022 provides procedures for manual sampling during the transfer of coal or coke, including sampling schemes, sample handling, preparation, storage, and reporting. The ISO 13909 series covers mechanical coal sampling.

Sampling during a moving stream or loading operation is generally more representative than taking a small sample from the surface of a stationary stockpile.

The contract should identify:

who appoints the surveyor;
who pays the inspection cost;
where sampling takes place;
which laboratory conducts the analysis;
how many sealed samples are retained;
which result is final and binding; and
how an umpire analysis will be conducted if a dispute occurs

8. Select the Correct Shipment Term

Incoterms® clarify the allocation of tasks, costs, and risks between buyer and seller. The contract should state the full term, the named port or delivery point, and “Incoterms® 2020.”

FOB Mother Vessel

Under standard FOB, the seller delivers the cargo on board the buyer-nominated vessel at the named port of shipment. Risk transfers when the goods have been loaded on board the vessel. FOB is suitable for non-containerized bulk cargo transported by sea or inland waterway.

A proper contract description might read:

FOB Named Indonesian Loading Port, Incoterms® 2020

FOB Barge or FOB Tongkang

“FOB barge” is widely used as a commercial expression in Indonesian coal trading, especially when coal is loaded onto a barge at a river jetty before being transported to a mother vessel.

However, the contract must define:

the exact delivery point;
whether risk transfers at the jetty or after barge loading;
who charters the barge;
who pays barge freight;
who bears transshipment risk;
where final sampling occurs; and
whether quantity is determined at the jetty, barge, or mother vessel

Do not rely on the words “FOB barge” alone.

CFR or CIF

Under CFR, the seller pays the ocean freight to the destination port, while marine risk transfers when the cargo is loaded at the port of shipment.

Under CIF, the seller also arranges the contractually required cargo insurance. CIF does not mean that the seller retains all cargo risk until the destination.

Indonesia Export Center’s current coal sourcing scheme prioritizes FOB barge and FOB mother-vessel inquiries. CFR or CIF requests require specific confirmation from the seller.

9. Confirm Maritime Safety Requirements

Coal is shipped as a solid bulk cargo and must comply with the applicable International Maritime Solid Bulk Cargoes Code requirements.

The IMSBC Code addresses hazards including cargo instability, chemical reactions, improper cargo distribution, and loss of vessel stability.

Certain coal cargoes containing fine particles and moisture may require assessment of their actual moisture content and Transportable Moisture Limit. IMO guidance notes that coal may liquefy if shipped above its TML under applicable cargo characteristics.

Before loading, the shipper, vessel owner, master, terminal, and surveyor should confirm the required:

cargo declaration;
IMSBC cargo classification;
moisture certificate;
TML certificate, where applicable;
self-heating precautions;
gas-monitoring requirements;
ventilation procedures; and
loading and trimming plan

These requirements should be handled by qualified maritime professionals.

10. Agree on a Secure Payment Structure

Payment terms depend on the seller, buyer profile, banking relationship, quantity, and contract duration.

Possible structures include:

Documentary Letter of Credit
Usance Letter of Credit
Telegraphic Transfer with agreed milestones
Domestic Indonesian banking instruments for local transactions

For a first transaction, the parties may consider a smaller trial cargo if operationally and commercially feasible.

Buyers should avoid:

transferring a large advance to an unrelated personal account;
paying before verifying the seller and legal source;
accepting sudden beneficiary changes without documentation;
relying only on messages sent through social media;
accepting unverifiable inspection reports; or
issuing a financial instrument that does not match the signed contract

Banks should independently authenticate Letters of Credit, amendments, guarantees, and other financial messages through official banking channels.

11. Prepare the Export and Import Documents

The document package may include:

Commercial Invoice
Bill of Lading
Certificate of Origin
Certificate of Analysis
Surveyor Report
Weight Certificate or Draft Survey Report
Moisture and TML certificates when applicable
Cargo declaration
Insurance certificate for CIF shipments
Vessel and shipping documents
Indonesian customs-export documentation
Documents required by the destination country

Indonesian Customs requires the exporter to submit a Pemberitahuan Ekspor Barang, or PEB, together with the relevant supporting customs documents. Goods may also be subject to selective physical inspection based on customs risk management.

Indonesia’s Certificate of Origin, known locally as Surat Keterangan Asal or SKA, certifies that the exported goods originate from the exporting country.

The exact HS classification must be confirmed with the buyer’s customs broker. Indonesian Regulation No. 15 of 2026 covers several coal headings under HS Chapter 27, including bituminous fuel coal and other coal classifications.

The importer remains responsible for confirming:

import licences;
customs duties and taxes;
environmental permits;
power-plant or industrial-fuel restrictions;
sanctions and banking compliance;
destination-port requirements; and
local coal-quality regulations

12. Include Clear Claims and Settlement Provisions

The Sales and Purchase Agreement should explain how claims will be handled after loading or discharge.

Important provisions include:

final quantity determination;
final quality determination;
document-presentation deadline;
demurrage and despatch;
quality adjustment formula;
rejection procedure;
retained sample period;
umpire laboratory procedure;
claims-notification deadline;
governing law;
dispute-resolution mechanism; and
force-majeure provisions

A cargo that is commercially acceptable but slightly different from the typical specification should be settled using the agreed adjustment formula. A cargo outside the rejection limits should follow the rejection or renegotiation procedure stated in the contract.

Common Warning Signs in Coal Transactions

International buyers should conduct additional due diligence when they encounter:

Prices substantially below comparable market levels
No identifiable mine or stockpile source
Refusal to permit independent inspection
No clear loading point
Unverifiable mining or trading permits
A bank account unrelated to the contractual seller
Repeated requests for unofficial fees
A copied or altered Certificate of Analysis
No rejection limits or quality-adjustment formula
A seller promising any quantity, grade, port, and payment term without verification
Requests for financial documents before basic seller information is provided

A genuine supplier should be able to explain the commercial and legal supply chain clearly, although some confidential documents may only be disclosed after the buyer has passed company verification.

How Indonesia Export Center Supports International Buyers

Indonesia Export Center works as a sourcing and coordination partner connecting international buyers with selected Indonesian suppliers and export-oriented supply networks. Its website states that it supports specification matching, supplier communication, product sourcing, and export preparation.

Buyers looking for an Indonesian Steam Coal Supplier may submit an official inquiry for available thermal-coal grades from selected Indonesian supply areas.

Support may include:

Matching the buyer’s required GAR with available supply
Coordinating preliminary seller information
Checking current stock and loading options
Communicating buyer specifications
Coordinating COA and surveyor information
Discussing FOB barge or FOB mother-vessel arrangements
Assisting communication between buyer, supplier, and export partners

The legal seller, registered exporter, designated BUMN export channel, mine source, inspection company, and payment beneficiary must be identified and agreed separately for each transaction.

Information Required to Request a Quotation

Please provide:

Required coal grade and complete specification
Quantity per shipment and monthly requirement
Destination country and port
Preferred shipment term
Target shipment period
Preferred payment method
Buyer’s legal company name and profile
Import licence or company registration, where applicable
Official LOI or RFQ
Required inspection and documentation

Incomplete inquiries may only receive an indicative response because the final price depends on the latest mine availability, stockpile condition, loading point, surveyor result, vessel schedule, and seller approval.

Frequently Asked Questions

What is the minimum order quantity for Indonesian steam coal?

MOQ depends on the loading point, barge capacity, mother-vessel size, seller policy, and current stock availability. Buyers should state their required quantity rather than assuming a fixed MOQ.

Is GAR 5000 the same as NAR 5000?

No. GAR and NAR use different heat-value definitions. The contract must state the required basis and the applicable test standard.

Can buyers purchase Indonesian coal on CIF terms?

CIF may be possible when specifically approved by the seller. Indonesia Export Center’s current sourcing scheme primarily receives FOB barge and FOB mother-vessel inquiries.

Is a preliminary COA sufficient?

A preliminary COA helps buyers evaluate the product, but the contract should normally rely on representative sampling and independent analysis during the agreed loading stage.

Which coal grade should a buyer choose?

The correct grade depends on boiler design, fuel-handling system, permitted emissions, delivered energy cost, ash-disposal capacity, and operational requirements. Buyers should obtain technical approval from their plant team before signing a purchase contract.

Conclusion

Importing Indonesian steam coal requires careful coordination between the buyer, legal seller, mine or stockpile operator, registered exporter, designated export channel, surveyor, shipping company, bank, and customs authorities.

The safest approach is to:

define a complete specification;
verify the seller and legal coal source;
appoint an independent surveyor;
use a detailed Sales and Purchase Agreement;
select a precise Incoterm and delivery point;
secure payment through verifiable banking channels; and
confirm both Indonesian export requirements and destination-country import rules.

International buyers seeking GAR 4200–5000 or GAR 5300–6600 coal may contact Indonesia Export Center with a complete RFQ, company profile, destination port, required quantity, payment preference, and target shipment schedule.

Indonesia Export Center
WhatsApp: +62 813-3302-277
Email: info@indonesiaexportcenter.com

Regulatory notice: This article was updated in July 2026 and is intended as general commercial information. Export, customs, banking, sanctions, shipping, and import regulations should be reconfirmed with the relevant authorities and licensed professionals before each transaction.