How PMK 1/2026 and Indonesia's 2026 Merger‑control & IDX Rule Changes Reshape M&A Restructuring, a 2026 Deal‑team Playbook

Three separate regulatory shifts that took effect in the first quarter of 2026 have fundamentally altered the playbook for M&A restructuring Indonesia transactions. PMK 1/2026, the Minister of Finance regulation effective 22 January 2026, tightens the documentation and eligibility requirements for tax‑neutral restructurings conducted at book value. At the same time, the KPPU (Business Competition Supervisory Commission) has formalised a mandatory post‑closing merger‑control notification regime with clearer thresholds and stiffer penalties for non‑compliance. Adding a third dimension, the Indonesia Stock Exchange (IDX) amended its free‑float rules in early 2026, requiring listed issuers to maintain a minimum 15 % public shareholding, a change that directly affects takeover structuring, IPO‑related M&A and post‑deal share consolidation strategies.

If you are about to close an Indonesian restructuring or acquisition in 2026, this guide is the end‑to‑end roadmap your deal team needs: from preserving tax neutrality under PMK 1/2026 to navigating KPPU filings and keeping your IDX listing intact.

Quick Timeline of 2026 M&A Restructuring Reforms in Indonesia

Before diving into the substance, deal teams should map each reform against their transaction timetable. The table below summarises the key dates, regulators and changes that define M&A restructuring Indonesia obligations in 2026.

Key Dates Table

Industry observers expect the combined effect of these three reforms to force deal teams to begin regulatory planning far earlier in the transaction lifecycle, ideally during the term‑sheet or LOI stage rather than at the SPA drafting phase.

What PMK 1/2026 Changes, Practical Tax Consequences for M&A Restructuring Indonesia Transactions

PMK 1/2026, issued by the Ministry of Finance and effective 22 January 2026, replaces and consolidates earlier regulations governing the use of book value (nilai buku) in corporate restructurings. The regulation is the primary authority on restructuring tax rules Indonesia practitioners must consult before closing any qualifying reorganisation.

Scope and Key Definitions

PMK 1/2026 applies to mergers (penggabungan), consolidations (peleburan), spin‑offs (pemisahan) and certain qualifying share‑for‑share exchanges. The regulation defines “book value” as the net asset value recorded in the transferring entity’s financial statements, prepared in accordance with Indonesian Financial Accounting Standards (SAK), as at the restructuring effective date. It introduces a tighter definition of “qualifying restructuring”, the transaction must have a clear business purpose (tujuan usaha yang jelas) and must not be structured primarily to obtain a tax benefit. Deal teams should note that this anti‑avoidance language gives the Directorate General of Taxes (DGT) broad interpretative authority to deny book‑value treatment where a restructuring lacks commercial substance.

Who Qualifies for Tax Neutrality, Tests and Documentation Required

To preserve tax‑neutral restructuring treatment, the transferring entity and the surviving entity must jointly submit a written application to the DGT, accompanied by:

• Audited financial statements of both entities as at the restructuring effective date.
• An independent valuation report prepared by a registered appraiser, confirming the book values of the transferred assets or shares.
• A business‑purpose statement setting out the commercial rationale, supported by board resolutions and shareholder approvals.
• A restructuring plan describing the timeline, structure and post‑transaction shareholding arrangements.
• Tax identification numbers (NPWP) and proof of current tax compliance for all entities involved.

The DGT may reject the application if any of the above documents are incomplete, if the restructuring is deemed to lack a genuine business purpose, or if the tax benefit derived from the book‑value treatment is disproportionate to the transaction’s economic substance. Early engagement with the DGT, ideally through a pre‑filing consultation, is strongly advisable for complex restructurings.

Share Transfer vs Asset Transfer: Tax Mechanics and Carryover Basis

Under PMK 1/2026, the distinction between share transfers and asset transfers carries significant tax implications. In a qualifying share transfer, the transferor’s cost basis in the shares carries over to the transferee at book value, and no capital gains tax is triggered at the point of transfer. In a qualifying asset transfer (typically as part of a merger or spin‑off), the receiving entity inherits the transferor’s tax book values for the transferred assets, and depreciation continues on the same schedules. However, where a restructuring fails to qualify, or where the DGT subsequently disqualifies it, the transaction is recharacterised as a taxable disposal at fair market value.

For asset transfers, this means the transferor recognises a capital gain equal to the difference between the assets’ fair market value and their tax book value. For share transfers, the standard 22 % corporate income tax rate applies to the gain. The practical consequence is clear: deal teams must treat PMK 1/2026 documentation requirements as a condition precedent to closing, not a post‑closing housekeeping task.

Worked Numerical Example: Tax‑Neutral Merger vs Non‑Neutral Sale

Consider a merger where Company A absorbs Company B. Company B’s net assets have a tax book value of IDR 100 billion and a fair market value of IDR 150 billion.

The IDR 11 billion tax saving illustrates precisely why PMK 1/2026 compliance is not optional, it is the single largest economic variable in many Indonesian restructurings. Tax rates referenced above reflect the standard corporate income tax rate under Indonesia’s Income Tax Law (Undang‑Undang Pajak Penghasilan).

KPPU Merger Control 2026, Mandatory Post‑Closing Regime and Consequences

Indonesia’s competition law framework requires mandatory notification of qualifying mergers, consolidations and acquisitions to the KPPU. The 2026 procedural reforms have sharpened the regime’s teeth and expanded its practical reach, making KPPU merger control a critical workstream for every M&A deal team.

Overview: Mandatory Post‑Closing Notifications, Who Must Notify, Thresholds, Timelines

Under Indonesia’s post‑closing merger control framework, the surviving entity or the acquirer must notify the KPPU within 30 working days after the legal effective date of the transaction. Notification is mandatory where the combined entity’s total assets or total turnover exceeds the KPPU’s prescribed thresholds. For the banking sector, a separate, higher asset threshold applies. The notification must be filed using the KPPU’s prescribed forms and accompanied by audited financial statements, a description of the market, an assessment of market share, and an analysis of the transaction’s competitive effects.

Transactions that fall below the thresholds are not exempt from KPPU scrutiny, the KPPU retains the authority to investigate any transaction it believes may substantially lessen competition, even absent a formal filing.

Practical Risk: Enforcement, Fines and Undertaking Obligations

Failure to notify within the prescribed 30 working‑day window can result in administrative fines of up to IDR 25 billion per day of delay. Beyond financial penalties, the KPPU may impose behavioural or structural remedies, including forced divestiture of assets or business units, if it determines that the transaction substantially lessens competition. In practice, KPPU investigations can take several months, creating post‑closing uncertainty that affects earn‑outs, integration timelines and financing covenants. The likely practical effect is that deal teams must now build KPPU filing timelines directly into their SPA timetable and escrow mechanics.

Filing Checklist

• Prescribed KPPU notification form, completed and signed by an authorised representative of the surviving entity.
• Audited financial statements of all parties for the two most recent financial years.
• Market analysis, relevant product and geographic market definitions, market share data, and competitive assessment.
• Transaction documents, copies of the SPA, merger deed or consolidation agreement.
• Post‑transaction corporate structure chart.
• Filing fee payment receipt.

IDX Free‑Float Changes and Listing / Takeover Implications for M&A Restructuring Indonesia

The IDX Board of Directors’ 2026 amendment to the listing rules establishes a minimum IDX free float 15 % threshold for all listed issuers, a change with direct consequences for takeover strategies, IPO‑related restructurings and post‑deal share consolidation.

What Changed: The 15 % Free‑Float Threshold and Expanded Definitions

Under the amended rules, “public shares” are now defined more narrowly to exclude shares held by controllers, affiliates and parties acting in concert. This expanded definition means that some issuers previously in compliance may now fall below the 15 % threshold. Issuers that breach the minimum free float post‑transaction are required to restore compliance within a specified remedial period, failure to do so may result in trading suspension, enhanced disclosure obligations or, ultimately, delisting proceedings.

Implications for IPO Readiness, Takeover Strategy and Squeeze‑Out Mechanics

For acquirers planning a takeover of a listed Indonesian company, the 15 % free‑float rule constrains the maximum stake that can be accumulated before triggering mandatory tender offer obligations and free‑float breach. In practice, this means deal teams must model post‑transaction shareholding structures carefully: a share swap or merger that concentrates ownership beyond 85 % of total shares will require a plan to restore public float, whether through a secondary offering, a share placement or an agreed sell‑down timeline. For IPO‑related M&A, the 15 % threshold sets the minimum dilution a pre‑IPO restructuring must achieve to maintain listing eligibility.

Callout, When restructurings cause a temporary free‑float breach: Where a qualifying merger or consolidation temporarily reduces the issuer’s public float below 15 %, IDX rules provide a remedial window. Deal documentation should include specific covenants committing the surviving entity to restore compliance within this window, together with indemnities for any IDX sanctions triggered by the breach.

Practical In‑Deal Structuring Playbook, Pre‑Closing and Post‑Closing Steps for Tax Neutrality and Regulatory Compliance

The convergence of PMK 1/2026, KPPU reforms and IDX free‑float rules means that deal structuring Indonesia transactions in 2026 requires integrated planning across tax, competition and capital markets workstreams from day one.

Pre‑Deal Diligence Checklist

Before entering into binding agreements, deal teams should complete the following diligence items:

1. Confirm the target’s tax book values for all material assets and shares, obtain audited financials and independent valuation.
2. Assess whether the proposed structure qualifies for book‑value treatment under PMK 1/2026, prepare the business‑purpose statement and DGT submission package.
3. Run the KPPU threshold test, calculate combined assets and turnover to determine mandatory notification obligations.
4. Check the target’s IDX listing status and current free‑float percentage, model the post‑deal shareholding structure against the 15 % minimum.
5. Identify any related regulatory approvals (OJK, Bank Indonesia, sector‑specific licences) that interact with the restructuring timeline.
6. Review existing shareholders’ agreements, articles of association and any pre‑emption or tag‑along rights that could affect structure.

Structure Options: Pros and Cons

Drafting and Contractual Protections

Deal documentation for M&A restructuring Indonesia transactions in 2026 should include the following protective provisions. Understanding why disclosure letters are crucial in M&A deals is essential context for these drafting strategies:

• Tax neutrality condition precedent. Make closing conditional on receipt of DGT confirmation (or at minimum, filing of the PMK 1/2026 application package) that the restructuring qualifies for book‑value treatment.
• Tax indemnity. The seller or transferor indemnifies the buyer against any tax assessed by the DGT if book‑value treatment is subsequently denied, covering the full tax, penalties, interest and costs.
• KPPU warranty and escrow. Include a representation that no party is aware of competition concerns; establish an escrow or deferred consideration mechanism tied to the outcome of KPPU’s post‑closing review.
• IDX remedial covenant. Where the transaction affects a listed issuer’s free float, include a covenant requiring the surviving entity to restore the 15 % minimum within the IDX‑prescribed remedial period, with specific performance remedies.
• Material adverse change clause. Define regulatory denial (DGT, KPPU or IDX) as a material adverse change triggering price adjustment or walk‑away rights.

Cross‑Border Issues: Treaty, Withholding and Transfer Pricing Flags

For cross‑border M&A Indonesia transactions, additional layers of complexity apply. Non‑resident acquirers must consider withholding tax on deemed dividends or capital gains, the applicability of Indonesia’s double‑tax treaties (particularly the beneficial ownership requirements under the MLI), and transfer pricing documentation obligations for intercompany transactions arising from the restructuring. Indonesia’s transfer pricing rules require contemporaneous documentation demonstrating arm’s‑length pricing for all related‑party transactions, including asset transfers and management fee arrangements established as part of the restructuring. For a broader overview of Indonesia’s foreign investment framework, see the Indonesia foreign investment guide (2026).

12‑Point Pre‑Closing Checklist

1. Obtain audited financial statements and independent valuation report for all entities.
2. Prepare the PMK 1/2026 DGT application package (business‑purpose statement, restructuring plan, board resolutions).
3. Confirm tax compliance status (NPWP, tax clearance certificates) for all entities.
4. Calculate KPPU combined asset and turnover thresholds, determine filing obligation.
5. Model post‑transaction shareholding structure against IDX 15 % free‑float minimum.
6. Identify sector‑specific approvals (OJK, Bank Indonesia, Ministry of Investment/BKPM).
7. Draft tax neutrality condition precedent and tax indemnity clauses for the SPA.
8. Include KPPU escrow or deferred consideration mechanism in deal documents.
9. Insert IDX remedial covenant with specific performance remedy.
10. Prepare KPPU notification documents in parallel with SPA execution.
11. For cross‑border deals: confirm treaty position, withholding obligations and transfer pricing documentation.
12. Schedule pre‑filing consultation with DGT and (optionally) voluntary consultation with KPPU.

Worked Examples, Tax Calculation and KPPU Filing Timeline

Example 1: Book‑Value Carryover in a Qualifying Spin‑Off

Company X spins off a division with assets at a tax book value of IDR 200 billion into a newly formed subsidiary (Company Y). Under PMK 1/2026:

Example 2: KPPU Post‑Closing Notification Timeline

Deal Documentation Templates and Clause Bank

The following clause outlines represent minimum protections that deal teams should insist on for any M&A restructuring Indonesia transaction in 2026. These should be adapted by qualified legal counsel to the specifics of each deal. Understanding how share capital increases through debt conversion work can also inform restructuring documentation:

• Tax neutrality CP. “Closing shall be conditional upon the Transferor and the Surviving Entity having submitted to the DGT all documents required under PMK 1/2026 for book‑value treatment, and no rejection having been received prior to the Closing Date.”
• KPPU escrow trigger. “An amount equal to [X]% of the Purchase Price shall be held in escrow pending confirmation from the KPPU that no further action, undertaking or remedy is required in connection with the Transaction.”
• IDX remedial covenant. “The Surviving Entity undertakes to restore the Issuer’s free‑float to not less than 15 % of issued shares within [90/180] calendar days of Closing, failing which the Buyer shall procure a secondary offering or placement sufficient to achieve compliance.”

Quick Compliance Checklist and Timeline for M&A Restructuring Indonesia

This printable checklist consolidates the key action items across all three regulatory workstreams.

Conclusion

The 2026 regulatory landscape for M&A restructuring Indonesia has changed decisively. PMK 1/2026, the reinforced KPPU post‑closing merger‑control regime and the IDX 15 % free‑float threshold together demand that deal teams adopt an integrated, multi‑workstream approach from the earliest stages of transaction planning. The cost of non‑compliance, whether a denied tax‑neutral restructuring, daily KPPU fines or an IDX trading suspension, can be measured in billions of rupiah and months of delay. Early, coordinated engagement with tax, competition and capital markets advisers is not merely best practice; in 2026, it is the only prudent path to a successful close. For deeper insight into the broader evolving Indonesian regulatory landscape, including sector‑specific considerations, continue exploring the Global Law Experts Indonesia practice area.

Sources

1. Ministry of Finance (Republic of Indonesia), PMK repository
2. Directorate General of Taxes (DGT)
3. KPPU (Business Competition Supervisory Commission)
4. Indonesia Stock Exchange (IDX)
5. PwC Indonesia, Legal Alert on PMK 1/2026 & IDX Changes (2026)
6. Pajakku, PMK 1/2026 Explanation
7. AHP, Indonesian Legal Commentary