Korea's 2026 Tax Reform Bill: What Foreign Companies and Multinationals Need to Know

Executive summary

Note on status: On August 4, 2026, Korea's Ministry of Economy and Finance released its 2026 Tax Revision Bill. The bill still requires approval by the National Assembly before it becomes law, and the final legislation may differ from the proposal. This guide therefore explains what is currently proposed — not what is already in force.

Korea's 2026 Tax Revision Bill is a broad package covering more than twenty tax measures, ranging from vehicle depreciation and investment incentives to gift tax valuation and tax administration.

Most of the proposals are domestic in focus. Several, however, are directly relevant to foreign investors, multinational groups, foreign employees, Korean branches, and companies with cross-border structures involving Korea.

The provisions most likely to matter to foreign companies include:

• a new Domestic Production Tax Credit for manufacturers of specified strategic products;
• an increase in the flat tax rate for eligible foreign employees from 19% to 21%;
• a clarification of VAT reverse-charge rules for services connected with a foreign corporation's Korean branch;
• a new 100% income exclusion for certain dividends arising from overseas restructurings;
• an expansion of the Foreign Investor Integrated Account to include ETFs and ETNs; and
• changes that could extend the period during which certain tax positions remain open to review.

For companies already operating in Korea, the practical question is not simply what the bill says. It is: which proposed changes should you be planning for now, even though the bill has not yet become law?

Who should read this

• Multinational groups with Korean manufacturing or R&D operations
• Foreign employees currently using, or considering, Korea's flat tax regime
• Foreign corporations operating through a Korean branch or place of business
• Korean subsidiaries involved in cross-border restructurings
• Regional finance directors and tax managers
• Foreign investors using Korean financial institutions for securities trading

The short answer

Six provisions are particularly relevant to foreign-invested businesses:

1. Domestic Production Tax Credit — A new production-based tax credit is proposed for manufacturers of specified strategic products, including solar, wind, batteries, semiconductors, critical materials, and AI robotics components. The proposed regime would apply to qualifying production from 2027 through 2036.
2. Foreign Employee Flat Tax Rate — The optional flat tax rate for eligible foreign employees would increase from 19% to 21%, while the regime would be extended through 2029.
3. VAT Reverse Charge for Branch-Related Services — The bill proposes a clearer rule for determining when services supplied by or through a foreign corporation's Korean place of business are treated as connected with that place of business for VAT purposes, based in part on whether the Korean place of business issued the tax invoice.
4. Overseas Restructuring Dividends — The income exclusion for certain dividends arising from qualifying overseas restructurings would increase from 95% to 100%, subject to specific ownership, holding-period, treaty-country, and restructuring conditions.
5. Foreign Investor Integrated Account — ETFs and ETNs would be added to the securities that can be traded through the Foreign Investor Integrated Account, subject to the detailed rules to be prescribed.
6. Extended Assessment Periods — Proposed changes would extend the period during which certain taxes arising from income disposition and carried-forward foreign tax credits can remain subject to review.

The proposed effective dates vary by provision, but many of the changes would apply to transactions, income, or tax years beginning in 2027.

Quick comparison

Understanding the key provisions

1. Domestic Production Tax Credit

The proposed Domestic Production Tax Credit is aimed primarily at encouraging strategic manufacturing in Korea rather than at foreign investors specifically.

However, it could be significant for multinational groups considering or already operating semiconductor, battery, renewable-energy, critical-material, or AI robotics manufacturing operations in Korea.

To qualify, a company would need to satisfy requirements relating to domestic manufacturing activities and Korean-sourced production costs. The proposed credit would also generally not be available together with the Integrated Investment Tax Credit for the same assets.

Eligible products would be limited to categories specified under the proposed regime. The detailed product categories would be prescribed by presidential decree.

The proposed credit would take into account factors including production costs, sales, and the location of the manufacturing operation. A regional multiplier would provide greater benefits for qualifying production outside the Seoul metropolitan area, while production within the Seoul Overconcentration Control Region would be excluded.

The credit would also phase down during the final years of the proposed ten-year period.

Practical consideration: companies already planning manufacturing investments should not necessarily wait until every implementing detail is finalized before evaluating the incentive. The bill itself provides much of the basic framework. The presidential decree is expected to provide more detail, particularly regarding eligible product categories and other implementing requirements.

2. Higher flat tax rate for foreign employees

The proposed flat tax rate for eligible foreign employees would increase from 19% to 21%.

At the same time, the current regime, which was scheduled to expire at the end of 2026, would be extended through 2029.

The existing 20-year limitation on the use of the regime and the exclusion of most deductions and credits would remain.

Practical consideration: a foreign employee who previously benefited from the 19% rate should not automatically assume that the flat-rate regime remains the most favorable option. For employees close to the point at which the flat rate and progressive tax regime produce similar results, the proposed increase to 21% makes it worthwhile to re-run the tax calculation before making or continuing the election.

3. VAT reverse-charge rules for services connected with a Korean branch

VAT treatment of services involving a foreign corporation's Korean branch or other Korean place of business can create difficult questions, particularly where the contractual parties, invoice issuer, service provider, and Korean operations do not all line up.

The bill proposes a clearer test based on whether the Korean place of business issued the tax invoice for the service.

The practical significance is that documentation and invoicing may become particularly important in determining whether a service is treated as connected with the Korean place of business for VAT purposes.

Practical consideration: foreign companies operating through Korean branches should review:

• who enters into the service agreement;
• who actually performs the services;
• which entity issues the invoice;
• whether a Korean tax invoice is issued; and
• how the transaction is reflected in the branch's accounting and VAT filings.

4. 100% exclusion for certain overseas restructuring dividends

Korea currently provides a 95% income exclusion for dividends received by a Korean parent from a qualifying foreign subsidiary, subject to the existing requirements.

The bill proposes to increase the exclusion to 100% for certain dividends arising from overseas restructurings.

However, this is not a general increase applicable to all foreign-source dividends.

The proposed relief is subject to specific conditions, including requirements relating to:

• the foreign subsidiary being located in a tax treaty country;
• the Korean parent directly and continuously holding at least 50% of the foreign subsidiary;
• the foreign subsidiary distributing shares received from its own wholly owned subsidiary;
• the relevant entities having operated for at least five years; and
• other conditions concerning the restructuring and distribution.

A related provision addresses the tax basis of shares received in the restructuring.

Accordingly, the proposed 100% exclusion should be viewed as targeted restructuring relief rather than a general participation exemption increase.

Practical consideration: a planned group restructuring should be tested against the detailed requirements before the tax benefit is incorporated into the transaction model.

5. Foreign Investor Integrated Account expanded to ETFs and ETNs

The Foreign Investor Integrated Account currently facilitates certain securities transactions by foreign investors through Korean financial institutions.

The bill proposes expanding the eligible products to include ETFs and ETNs, while excluding leveraged and inverse products.

The detailed eligible product list would be prescribed by presidential decree.

The proposed change does not fundamentally change the withholding mechanism: tax would continue to be withheld when income is paid to the foreign institution that opened the account rather than directly to the underlying foreign investor.

6. Two proposed changes to assessment periods

Two relatively technical provisions could have practical significance for multinational groups.

Income disposition. Korea generally applies a five-year assessment period, with longer periods applying in certain circumstances, including fraud or non-filing. The bill proposes to apply the corresponding extended periods to certain income tax or corporate tax arising from income disposition connected with corporate tax adjustments. The practical effect is that the tax arising from an income disposition could remain open for review for longer in circumstances where the underlying corporate tax adjustment is itself subject to an extended assessment period.

Carried-forward foreign tax credits. The bill also proposes a rule under which the assessment period for certain carried-forward foreign tax credits would remain open until a specified period after the filing deadline for the year in which the credit is actually used. For multinational groups carrying forward foreign tax credits over several years, this could extend the period during which supporting documentation needs to be maintained.

7. The rest of the bill, briefly

The remaining proposals are mostly domestic in focus, but may be relevant depending on a company's Korean operations or investment activities:

• EV depreciation cap raised, other vehicles reduced — the annual deductible depreciation/disposal-loss limit for electric and hydrogen business passenger vehicles would rise from KRW 8 million to KRW 10 million, while the limit for other vehicles would fall to KRW 7 million for vehicles acquired or leased from 2027.
• Input VAT credit for autonomous-vehicle R&D — qualifying companies developing or supplying software for autonomous passenger vehicles under temporary authorization would be able to claim input VAT on vehicles used for the relevant R&D.
• New incentive for Business Development Company investors — qualifying dividends from listed BDCs would receive separate taxation at 9%, subject to the proposed conditions and contribution limit.
• Expanded bad-debt allowance for productive finance loans — certain loans to startups, venture companies, new-technology companies, and borrowers connected with the Advanced Strategic Industry Fund would receive more favorable bad-debt treatment.
• Lower withholding on certain personal service income — the withholding rate on specified services such as writing, lecturing, and delivery would decrease from 3% to 2% for income paid from 2027.
• R&D and investment tax credit extensions — certain New Growth and Source Technologies and National Strategic Technologies would receive extended credit periods.
• Integrated Employment Tax Credit narrowed — large enterprises would lose eligibility for the relevant credit going forward, subject to the detailed transition rules.
• Holding company restructuring relief extended — certain deadlines for capital-gains tax deferral and related installment payments would be extended.
• New valuation rule for certain listed shares — a special valuation method would apply in specified circumstances involving artificially depressed share prices for inheritance and gift tax purposes.
• Treasury stock tax treatment overhauled — the bill proposes significant changes to the tax treatment of treasury stock transactions, including deemed dividends, income recognition, and related corporate tax consequences.
• Higher documentation-free thresholds for business promotion expenses — certain thresholds would increase for congratulatory, condolence, and other business promotion expenses.
• Greater penalty reductions for prompt late filing — a new 75% reduction would apply in specified circumstances where a late return is filed within one week of the deadline.
• Greater penalty reduction for delayed pre-assessment review decisions — the proposed reduction would increase where the tax authority takes more than 30 days to decide a pre-assessment review request.
• Permanent VAT exemption for certain social-infrastructure PPP construction — an existing exemption would become permanent rather than expiring at the end of 2026.
• International transaction reporting penalties clarified — the bill would clarify that penalties may apply not only to late or false filings but also to filings containing material omissions or errors.

Practical insight: don't wait for the decree to start planning

Practical insight: the 100% dividend exclusion has a narrow door

What foreign companies often get wrong

1. Treating the bill as final. A tax bill is not the same thing as enacted legislation. Companies sometimes begin changing payroll, accounting, or transaction structures based solely on a proposal. The 2026 Tax Revision Bill still requires National Assembly approval, and the final legislation may change. Better approach: identify the provisions that could materially affect your business, model the potential impact, and wait for the final legislation before making irreversible changes.
2. Assuming the new production credit is available to any manufacturer. The proposed Domestic Production Tax Credit is not a general manufacturing incentive. Eligibility is tied to specified strategic product categories and additional requirements, with important details still to be prescribed. Better approach: identify the precise product and manufacturing activities first, then test them against the final statutory and decree requirements.
3. Failing to re-run the foreign employee tax calculation. An employee who benefited from the 19% flat rate may continue to assume that it is automatically more favorable than Korea's progressive tax rates. A move to 21% changes that calculation. Better approach: compare the proposed 21% flat rate with the progressive regime based on the employee's actual compensation and circumstances before making the election.
4. Treating the 100% dividend exclusion as a general exemption. The proposed 100% exclusion applies to qualifying dividends arising from specific overseas restructuring transactions — not to every dividend received from a foreign subsidiary. Better approach: review the ownership percentage, holding period, treaty-country requirement, restructuring steps, and distribution mechanics before relying on the proposed benefit.
5. Overlooking documentation when assessing future tax exposure. The proposed assessment-period changes may extend the period during which certain tax positions can remain open to review. This matters particularly for multinational groups with income-disposition issues, carried-forward foreign tax credits, long-term tax positions, or tax attributes used several years after they originally arose. Better approach: review document-retention policies for tax positions that may remain relevant well beyond the original tax year.
6. Looking at each provision in isolation. This may be the most important practical mistake. A multinational group may simultaneously be affected by several provisions — for example, a manufacturing group may need to consider the new production credit, existing investment credits, R&D incentives, foreign employee taxation, and the treatment of cross-border transactions. Better approach: evaluate the bill against the company's overall Korean tax profile rather than reviewing each amendment separately.

Frequently asked questions

Practical checklist

If your company may be affected by Korea's 2026 Tax Revision Bill:

• Identify which proposed provisions apply to your Korean operations.
• Determine whether your products or investments could qualify for the proposed Domestic Production Tax Credit.
• If you have already claimed the Integrated Investment Tax Credit, evaluate whether the proposed production credit could produce a better result.
• Re-run foreign employee tax calculations using the proposed 21% flat rate.
• Review Korean branch invoicing and VAT processes in light of the proposed reverse-charge clarification.
• If a cross-border restructuring is being considered, test the transaction against every condition for the proposed 100% dividend exclusion.
• Review the potential impact of the proposed assessment-period changes on foreign tax credits and income-disposition positions.
• Consider whether your current tax-document retention policy is sufficient for positions that may remain open for an extended period.
• Monitor the final National Assembly legislation and subsequent presidential decrees before implementing structural changes.

Key takeaways

Korea's 2026 Tax Revision Bill is broad, but only a subset of the proposed changes are likely to have a direct impact on foreign companies and multinational groups. The most important items to watch are the proposed Domestic Production Tax Credit, 21% foreign employee flat tax rate, Korean branch VAT clarification, 100% exclusion for certain restructuring dividends, expanded Foreign Investor Integrated Accounts, and extended assessment periods.

None of these changes should be treated as final until the legislation is enacted. But for companies with significant Korean operations, waiting until the final legislation is enacted may also mean missing the opportunity to plan effectively. The practical approach is to identify the provisions that could affect your business, quantify the potential impact, and be ready to adjust once the final rules are confirmed.

Related guides

• Korea's 2026 Tax Reform Proposal: International Tax Changes at a Glance
• International Transaction Reporting Requirements in Korea: What Foreign Companies Must File
• Withholding Tax in Korea: What Foreign Businesses Need to Know (coming soon)
• Transfer Pricing for Korean Subsidiaries (coming soon)
• Korea VAT Registration for Foreign Companies: A Practical Guide