Korean Supplier Sourcing Guide: Brief to Supply Agreement

Key takeaways

Qualification comes before price. A quotation from a supplier that has not been qualified is not a reference price.
Approve production-representative samples made on the intended line, and keep a signed reference sample on both sides.
Agree ownership of tooling, moulds, drawings and formulations in writing before development starts, and have counsel confirm it.
Quotations and purchase orders are not a supply agreement. Change control, subcontracting, continuity of supply and termination need their own terms.
The decision-maker at a Korean supplier is often a senior owner-manager rather than the sales contact, and the relationship should be managed at that level.
When securing supply requires capital or control, treat it as a joint venture or acquisition decision, not an extension of purchasing.

Start with a specification and a qualification brief

Most sourcing problems that surface in production were created before the first supplier was contacted. A buyer that sends different suppliers different descriptions of the product, or that has not decided what makes a supplier eligible, receives quotations that cannot be compared and tends to qualify whoever responds fastest.

Two documents come first. The specification describes the product. The qualification brief describes the supplier the buyer needs. Both should be agreed internally by procurement, engineering, quality and the business owner of the product before any outreach.

What the specification must state

The specification should be precise enough for a supplier to quote without guessing, and for a quality engineer to accept or reject a delivery without argument.

Drawings, dimensions and tolerances, or the formulation and performance requirements
Materials, including any approved or prohibited material sources
Test methods and acceptance criteria
Packaging, labelling and the documents required with each shipment
Certification or registration requirements in the markets where the product will be sold, confirmed with advisers
Expected volumes, product life and how firm the forecasts are

What the qualification brief adds

The qualification brief sets out the minimum criteria a supplier must meet and how candidates will be compared. It separates pass-or-fail requirements, such as a necessary process capability or quality certification, from criteria that are weighed against each other, such as engineering support, flexibility or logistics.

Decide what you will not share yet

Decide early which information is released at each stage. A long-list can be screened on a non-confidential description of the product. Full drawings, formulations and cost targets should follow a signed confidentiality agreement and, usually, a first screening call.

Build and screen a supplier long-list

A long-list should be wider than the shortlist the buyer expects to need, because desk screening and first contact typically remove many candidates. The objective at this stage is coverage of the relevant manufacturing base, not early commitment to any single supplier.

Where candidates come from

Candidates in Korea usually come from several sources at once, and each source has blind spots.

Trade fairs and industry exhibitions, which show suppliers actively seeking customers
Industry associations and public export-promotion directories
Makers of comparable products for other international brands, identifiable from product references
Recommendations from existing suppliers, customers and engineers in the sector
Personal introductions, which are useful but should enter the same screening as every other candidate

Screening on desk research

Before contact, screen each candidate on what can be verified from outside: the products and processes it presents, its customer references, its corporate information and, where available, its published financial statements. Record why each candidate was kept or removed, so the shortlist can be defended internally.

Approaching suppliers

Approach suppliers in Korean where possible, with a short description of the buyer, the product category and the expected relationship, and a clear next step such as a questionnaire or a call.

Korean suppliers assess buyers too. Vague volumes, an unclear decision-maker or a request for detailed quotations before any qualification tend to lower the priority a capable supplier gives the enquiry.

Qualify suppliers against written criteria

Qualification tests whether a supplier can deliver the specification reliably, at the required volume, for the life of the product. A questionnaire gathers the supplier's own answers; documents, samples and a site visit test them.

Technical capability and capacity

Confirm that the supplier performs the critical processes in-house, with equipment and engineering support suited to the tolerances or formulation. Assess capacity as what is available on the relevant line after existing customers, not total factory capacity, and test it against the buyer's peak demand rather than the average.

Quality management systems

Certifications such as ISO 9001, or sector-specific quality and good-manufacturing-practice certifications, show that a system exists. Whether it works is shown by incoming inspection, process control records, calibration, traceability from finished product back to material lots, and how non-conformances and customer complaints have been handled.

Export experience

Experience with international customers usually means familiarity with export documentation, packaging for long transit, English-language quality documents and foreign certification requirements. A supplier without it may still be the right choice, but the buyer should expect to support it and plan time accordingly.

Financial stability and customer concentration

Review financial statements where available, and ask in general terms about the main customers and their weight in the business. A supplier heavily dependent on one large customer can reprioritise capacity around that customer, and is exposed if that customer leaves. A supplier that would become heavily dependent on the buyer creates a different risk: the buyer may find itself responsible for the supplier's survival.

Subcontracting and ownership

Ask which processes are subcontracted and to whom, and whether the supplier will accept approval rights over sub-suppliers and material sources. Understand who owns and runs the company. In many owner-managed manufacturers, decisions and succession sit with the founder or the family, which affects both the negotiation and long-term continuity.

Verify through samples, site audits and a pilot order

Verification turns the supplier's answers into evidence. The sequence matters: samples show whether the product can be made, the audit shows whether the process is controlled, and the pilot order shows whether both hold under commercial conditions.

Sample rounds

Distinguish engineering or development samples, which test the design, from production-representative samples made on the intended line with the intended materials and tooling. Approve against the written acceptance criteria, sign the approval record, and keep a reference sample on both sides.

Automotive and some industrial supply chains use a formal production part approval process. Other sectors benefit from a lighter version of the same discipline.

Site visits and audits

A site visit should follow a pre-audit questionnaire and document request, so that time on site is spent verifying rather than collecting. The technical judgment belongs to the buyer's quality team or an auditor it appoints.

The actual line that will make the product, and what else runs on it
Incoming inspection of materials and bought-in parts
In-process and final inspection, and the records behind them
Calibration and maintenance of equipment and tooling
Traceability from a shipment back to material lots
Non-conformance, rework and customer complaint records
Subcontracted processes and how they are controlled
Social, environmental and safety requirements imposed by the buyer's own customers

Pilot orders

A pilot order at limited volume tests packaging, labelling, export documentation, transit, lead-time reliability and the supplier's response to the first defect. Agree beforehand what the pilot must demonstrate before volume orders begin, and make the corrective actions from the audit conditions of that step.

Negotiate commercial terms on a comparable basis

Commercial terms should be negotiated after qualification and as one package. Unit price, minimum order quantities, lead times and payment terms trade against each other, and a concession on one is often recovered through another.

Pricing basis

Ask every supplier to quote on the same template, separating unit price, dedicated tooling, one-off development or certification charges, and packaging. State the volume bands and the delivery term to be quoted.

Agree how changes in raw-material prices or exchange rates will be handled — through an agreed index, a review interval or a threshold for renegotiation — rather than leaving it to each request for a price increase.

Minimum order quantities and lead times

Minimum order quantities often reflect material purchasing, set-up costs or line changeovers. Understanding the reason makes them negotiable: a buyer can sometimes lower a minimum by accepting a longer lead time, sharing a firmer forecast or committing to an annual quantity. Lead times should be agreed separately for first orders, repeat orders and urgent orders.

Payment terms and currency

New relationships commonly begin with a deposit and a balance against shipping documents, or with a letter of credit, and move towards open account as order history builds. Decide explicitly the currency of pricing and who carries exchange-rate risk. Tax, customs and invoicing implications should be confirmed with the buyer's tax and customs advisers.

Incoterms as a concept

Incoterms rules allocate delivery, costs and risk between seller and buyer: where the goods are handed over, who arranges carriage and insurance, and who handles export and import clearance. They do not settle price adjustment, title to the goods, payment or liability for defects, which the supply agreement must address. Choose the term that matches who actually controls the logistics.

Protect tooling, drawings and formulations before development starts

Intellectual property in sourcing is decided mostly in the first weeks of a relationship, when the buyer shares drawings, the supplier proposes improvements and tooling is ordered. What is not agreed then is hard to recover once production depends on the supplier.

Ownership positions should be framed commercially and documented with counsel, including whether registration or other protection is needed in the relevant jurisdictions.

Before disclosure

Sign a confidentiality agreement before sharing drawings, formulations or cost targets, and release information in stages. The agreement should restrict use of the information, not only its disclosure. Mark confidential documents, keep a log of what was sent to whom, and agree that materials are returned or destroyed if the supplier is not selected.

Tooling and moulds

Dedicated tooling is often paid for by the buyer, either separately or amortised in the unit price. Paying separately and documenting acceptance makes ownership easier to show.

Who owns each tool, recorded in the supply agreement or a separate tooling agreement
Identification marking and a tooling register with locations
Responsibility and cost for maintenance, repair and replacement
Insurance while tooling is at the supplier's site
A prohibition on using the tooling for other customers
The procedure for returning tooling on termination

Drawings, designs and formulations

Distinguish the background IP each party brings from the results created during the project, and decide in advance who owns improvements the supplier makes to the buyer's design.

In ODM arrangements, including cosmetics, the supplier typically owns the design or formulation it developed unless agreed otherwise. The buyer's options include exclusivity for the product, a licence or a buy-out, and each should state what happens if the buyer moves production. The buyer should also confirm it will receive the technical information needed for its own regulatory filings.

Put the relationship into a supply agreement

Quotations and purchase orders can carry a relationship for a long time, but they seldom address what happens when a process changes, a defect reaches customers or one side wants to exit. A framework supply agreement, with the specification and a quality agreement as schedules, sets those terms while both sides still want the relationship to work.

Legal drafting, governing law, dispute resolution and enforceability are questions for counsel. Where the agreement is prepared in Korean and English, it should state which version prevails.

Quality obligations

Set out conformity with the specification, inspection and acceptance procedures, the handling of non-conforming product, warranty and remedies, how the cost of defects found at the buyer's customers is allocated, cooperation in recalls, and the buyer's right to audit.

Change control and subcontracting

Require advance written notice and buyer approval before changes to materials, material sources, processes, production site, key equipment or subcontractors that could affect the product. Unapproved change is a frequent root of quality failures that are hard to trace.

Exclusivity and volume commitments

Exclusivity can run in either direction. The supplier may be asked not to make the product for competitors; the buyer may be asked for minimum volumes or sole-source status. Tie any exclusivity to scope, territory, period and performance, and to the consequences of missed forecasts.

Termination and continuity of supply

Define termination rights and notice, last-time-buy arrangements, the transfer of tooling and technical documentation, and support during a move to a new supplier. A buyer that cannot move production in an orderly way has less leverage throughout the relationship, not only at its end.

Manage communication and the supplier relationship

Once supply begins, the relationship is managed through people, records and routine. Korean suppliers commonly give priority to customers that are predictable, responsive and clear about who decides.

Decision-makers on both sides

Identify who at the supplier decides on price, capacity allocation and quality escalations. In owner-managed companies this is often the chief executive or a senior executive rather than the sales manager. Match that level on the buyer's side for commercial matters, and give the day-to-day contact enough authority to resolve routine issues without referring everything to headquarters.

Language and written records

Use Korean-language specifications, quality documents and meeting summaries where precision matters, and state which version governs. Confirm in writing what was agreed in meetings and calls. Misunderstandings in translation are rarely noticed until a shipment arrives.

Regular business reviews

Hold periodic reviews of quality performance, delivery, open corrective actions, forecasts and planned changes on both sides. Early notice of volume or design changes is valued by suppliers and costs the buyer little.

When sourcing becomes a partnership, joint venture or acquisition

Some supplier relationships reach a point where purchase orders and a supply agreement cannot secure what the buyer needs. That point usually shows itself in one of a few ways.

The buyer needs dedicated capacity or a new line that the supplier will not fund alone
Products are being co-developed and ownership of the results is contested
The two companies see an opportunity to serve third markets together
The supplier's founder-owner is considering succession or a sale
The buyer's dependence on the supplier has become a risk to its own business

Choosing between contract, partnership and ownership

The options range from a strategic supply agreement with capacity reservation and co-development terms, through a minority investment or a joint venture with the Korean supplier, to an acquisition of the supplier. The questions change from price and quality to control, valuation, governance, retention of key people and exit.

Questions to confirm before offering capital

Where a foreign buyer takes shares in a Korean supplier, whether the investment counts as foreign investment depends on its amount and on the shareholding or officer appointments involved ^[1]. A share acquisition above a certain level can also be one of the transactions that trigger a merger filing, where the parties meet the size thresholds ^[2].

Both points should be confirmed with Korean counsel before any offer is made, and the existing supply terms should be reviewed so that they remain consistent with the transaction.

How to sequence the work, and the mistakes to avoid

A sourcing project holds together when each decision is taken before the step that depends on it. Prospera works in the order Diagnose, Structure, Connect, Execute, and the same sequence applies whoever runs the work.

A workable sequence

Stages overlap in practice, but a step taken ahead of the one it depends on usually has to be undone later.

Diagnose: define what is being sourced, the volumes the buyer can commit to, internal approvers and eligibility requirements
Structure: agree the specification, the qualification brief, ownership positions and negotiating boundaries
Connect: build and screen the long-list, send questionnaires under confidentiality, and run samples and site audits
Execute: negotiate the commercial package and supply agreement, run the pilot order and move to volume production
Review: hold the first business review after initial volume deliveries and decide whether the relationship needs a different structure

Mistakes that recur

The same errors appear across sectors and supplier sizes.

Asking for prices before qualification, and anchoring on the lowest quotation
Sending full drawings or formulations before a confidentiality agreement and a first screen
Approving a development sample rather than a production-representative one
Paying for tooling inside the unit price without documenting ownership
Relying on quotations and purchase orders instead of a supply agreement
Letting a single contact or intermediary hold the whole relationship
Offering capacity funding or exclusivity informally, without the protections a partner or investor would require

Where Prospera fits

Prospera leads the business and transaction structure of a sourcing project from the brief to the first volume order, as described on the Korean supplier sourcing service page. Legal, tax and accounting services are provided by affiliated professional firms that contract directly with clients, and technical audits remain with the buyer's quality team or the auditors it appoints.

For the wider question of how to operate in Korea, see the complete guide to entering Korea. To see which issues come first for your project, take the quick sourcing diagnosis.

Sources

Under the Enforcement Decree of the Foreign Investment Promotion Act, an equity investment generally qualifies as “foreign investment” when the amount is KRW 100 million or more and the foreign investor holds at least 10% of the voting shares, or holds shares and dispatches or appoints officers to the Korean company. Enforcement Decree of the Foreign Investment Promotion Act, Article 2(2) (retrieved 13 September 2026)
Summary for orientation only. Application to a specific transaction requires confirmation by qualified Korean counsel.
Under the Monopoly Regulation and Fair Trade Act, an acquisition of 20% or more of another company's shares (15% for a listed company) is one of the transactions that can trigger a merger filing with the Korea Fair Trade Commission, where the parties meet the size thresholds set by Presidential Decree. Monopoly Regulation and Fair Trade Act, Article 11(1) (retrieved 13 September 2026)
Summary for orientation only. Application to a specific transaction requires confirmation by qualified Korean counsel.