Korea First 90 Days After Incorporation

Quick answer

The first 90 days after Korea incorporation are when a foreign-owned company turns a registered entity into an operating business. Prioritize corporate bank activation, tax office setup, digital certificates, seal and signatory controls, accounting records, employment registrations, and any foreign-invested company follow-up filings. Treat the period as a controlled handover, not an administrative afterthought.

This guide explains what a foreign-owned Korean company should do in its first 90 days after incorporation in 2026. It is written for overseas parent companies, foreign founders, and startup teams that already completed registration and now need the business to function without losing compliance control.

The 90-day priority map

The first 90 days are not one deadline. They are a sequence of dependencies. A practical order usually looks like this:

Every document should tell the same story about who owns the company, who controls it, where the capital came from, and what the Korean business will actually do.

Days 1-15: lock the document baseline

Start by collecting the final incorporation package in one controlled folder. Foreign teams often have documents scattered among the law firm, accountant, bank, registered office provider, parent company secretary, and founder. That becomes risky when a bank asks for one version, the tax office has another, and the overseas head office signs a contract using an outdated address or company name.

The baseline package should usually include:

• corporate registry extract;
• articles of incorporation;
• business registration certificate;
• registered corporate seal and seal certificate;
• shareholder register;
• director and representative director records;
• office lease or address evidence;
• foreign investment notification and remittance evidence, if applicable;
• parent company documents and apostilles used for incorporation;
• board or shareholder approvals authorizing the Korean setup.

Check whether the English company name, Korean company name, registered address, representative director spelling, shareholder names, capital amount, and business purposes are consistent. A small spelling mismatch can become a bank KYC delay, tax portal issue, or contract signing problem.

If the company is still planning the order of formation steps, review our sequence guide to Korea incorporation, FDI, bank, tax, and visa timing. The post-incorporation phase is easier when the pre-incorporation evidence trail was built correctly.

Days 1-30: make the corporate bank account usable

Corporate bank account opening is often the first operational bottleneck. A company may have a capital payment account or temporary process during incorporation, but that is not the same as a fully usable operating account with internet banking, transfer limits, overseas remittance functions, tax payment capability, and internal authority controls.

Before the representative director visits the bank, ask for the bank’s current checklist for foreign-owned companies. Korean banks may request information on beneficial owners, source of funds, office substance, customer profile, expected transaction size, overseas counterparties, tax residency, sanctions exposure, and the business model. The answer should be specific enough for compliance review. “Consulting,” “trading,” or “software” may be too vague if the bank cannot understand who pays the Korean company and why.

Prepare a short banking memo that explains:

1. what the Korean company sells or provides;
2. who the expected customers and suppliers are;
3. why Korea is the operating location;
4. where the initial capital came from;
5. whether funds will be remitted overseas;
6. who will initiate and approve transfers;
7. how invoices, contracts, and accounting records will be kept.

For a deeper bank interview checklist, see our guide to the Korea bank KYC interview for foreign founders. After the account opens, do not stop at receiving the passbook. Configure internet banking, OTP custody, statement access, payment approval rights, and transfer limits. Our separate guide to Korea corporate internet banking, OTP, and transfer limits explains why this setup should be treated as a governance issue.

Days 15-45: set up tax and e-filing systems

The business registration certificate is only the start of tax administration. The company needs a practical system for invoices, VAT, withholding, payroll, expense evidence, bookkeeping, and tax filings. In Korea, many tax processes are digital, and the person who controls the certificate or portal access can effectively control filings and invoice issuance.

In the first 45 days, confirm who will manage:

• HomeTax access and accredited digital certificates;
• electronic tax invoice issuance and receipt;
• monthly payroll withholding, if employees or directors are paid;
• VAT filing calendar;
• corporate income tax bookkeeping;
• expense approval and supporting documents;
• overseas service fee or royalty withholding review;
• communication with the external accountant.

Foreign parent companies sometimes assume that the Korean accountant can fix everything at year-end. That is a bad assumption. Missing supplier tax invoices, paying directors without withholding review, using a personal card without documentation, or booking parent-company costs casually can create avoidable tax friction later.

If employees will be hired soon, align employment contracts, payroll setup, social insurance enrollment, and work authorization before the start date. If there will be no employees for several months, still decide how director compensation, contractor payments, and foreign service payments will be approved and documented.

Days 30-60: clean up FDI and capital records

Where the Korean company was formed as a foreign-invested company, the investment record needs continuing attention after incorporation. The bank, registry, tax office, and foreign investment records should match. If capital was remitted through an FDI process, preserve the remittance documents, deposit certificate, shareholder identity records, and any bank confirmations.

The company can generally use paid-in capital for legitimate business purposes after incorporation and bank release, but the spending trail still matters. Payments to founders, related parties, overseas affiliates, or vendors should have invoices, contracts, board approvals, or other evidence that explains the business purpose.

Our guide on using paid-in capital after incorporation in Korea covers the distinction between legitimate operating use and records that may look suspicious during later bank, tax, or immigration review.

If there will be additional capital, shareholder loans, SAFE-like arrangements, convertible instruments, or parent-company intercompany funding, do not improvise. Korea may treat capital increases, foreign loans, interest payments, and foreign exchange reporting differently. Decide whether the funding is equity, debt, service revenue, reimbursement, or temporary advance before the money moves.

Days 45-90: build operating controls before the company scales

The first contracts, first payments, first hires, and first tax filings create habits. If the foreign parent lets one founder hold the seal, bank OTP, accounting login, and contract authority without oversight, the structure may work for a few weeks but fail when the team grows, the representative director changes, or investors ask for diligence materials.

Set a basic authority matrix by day 90. It does not need to be complex. It should answer:

• Who can sign customer contracts?
• Who can approve vendor spending?
• Who holds the registered corporate seal?
• Who can request a seal certificate?
• Who initiates bank transfers?
• Who approves bank transfers?
• Who controls HomeTax and digital certificates?
• Who maintains the shareholder register and board records?
• Who reports material changes to the parent company?

For a foreign subsidiary, separate local execution from parent oversight. The representative director may legally bind the Korean company, but the parent company can still require internal approval for large contracts, related-party transactions, hiring, loans, IP licenses, and overseas remittances. Those internal controls should be written before the first dispute, not after.

Common first-90-days mistakes

Foreign-owned companies usually run into trouble for predictable reasons:

1. Bank account opened, but not operational. The company has an account number but no workable internet banking, transfer limit, or overseas remittance process.
2. Seal custody is unclear. The registered corporate seal is treated like stationery instead of legal authority.
3. Tax portal access sits with one person. If that person leaves or travels, filings and invoices can be blocked.
4. Capital evidence is incomplete. The shareholder, sender, investment notification, registry, and bank records do not match cleanly.
5. Contracts start before authority is settled. A sales manager, parent employee, or overseas founder signs Korean contracts without clear authority.
6. The company delays accounting until year-end. Missing VAT invoices and expense evidence are much harder to fix months later.
7. Immigration plans are separated from company records. D-8 or startup visa review may look back at capital, office, business activity, and tax evidence.

Practical checklist for foreign founders

Use this checklist before the end of month three:

• Registry extract, business registration certificate, articles, seal certificate, and shareholder register saved in one folder.
• Bank account activated for deposits, withdrawals, statements, tax payments, and relevant remittances.
• Internet banking users, OTP custody, and transfer approval process documented.
• HomeTax access and e-tax invoice process tested.
• Accountant onboarded with a monthly document-sharing routine.
• Capital remittance and FDI evidence preserved.
• Board or shareholder approvals stored for incorporation and major first actions.
• Customer and vendor contract templates reviewed for Korean law issues.
• Employment, contractor, or director payment rules confirmed before payments begin.
• Parent-company reporting line and approval thresholds written.
• Calendar created for VAT, withholding, corporate tax, annual meeting, and registry changes.

If you need help building the launch sequence before incorporation, see our Korea company incorporation service. Early planning is usually cheaper than repairing bank, tax, and authority issues after the company has already started operating.

FAQ

Does a Korean company become fully operational immediately after incorporation?

No. Incorporation creates the legal entity, but practical operation still depends on bank activation, tax portal setup, digital certificates, internal authority controls, accounting, and sometimes FDI follow-up records. A company can be legally registered yet still unable to pay vendors, issue invoices, or pass bank compliance review smoothly.

Who should hold the corporate seal and bank OTP?

There is no universal answer, but both should be treated as control assets. Many foreign-owned companies separate custody and approval: one person may physically hold the seal or OTP, while use requires documented approval from the representative director, parent company, or another authorized officer. The arrangement should be written and updated when personnel change.

What should foreign founders do if the bank delays account activation?

Ask the bank which specific KYC item is unresolved. Common issues include unclear source of funds, vague business model, incomplete beneficial ownership documents, weak office evidence, or inconsistent names across documents. Provide a concise explanation package rather than sending random documents one by one.

Is the first 90 days checklist different for a small startup?

The checklist can be lighter, but the core controls still matter. A small startup may not need a complex approval matrix, but it still needs clean bank access, tax invoice capability, capital records, contract authority, and accounting routines. Small companies often suffer more from early mistakes because one founder holds too many keys.

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