Verra vs SRN-PPI vs IDXCarbon: The Three-Layer Stack Behind Indonesian Carbon Credits

Most buyers asking "Verra or SRN-PPI or IDXCarbon?" have already framed the question wrong. These three are not competing products. Verra is a standard that defines what counts as a credit. SRN-PPI is Indonesia's national registry that records what the state has authorised. IDXCarbon is the exchange where units actually trade. A single Indonesian REDD+ credit can pass through all three: issued under VCS, mirrored into SRN-PPI under the October 2025 mutual-recognition agreement, then listed on IDXCarbon for a domestic compliance buyer. Confusion is the norm because the regulatory boundary between the three only stabilised in late 2025, and the operational hand-offs (especially around corresponding adjustments) are where mistakes still happen.

Verra (VCS) at a glance

Verra is a US-based 501(c)(3) non-profit running the Verified Carbon Standard programme, the largest voluntary carbon standard by issued volume globally. It approves methodologies, accredits validation and verification bodies, and issues VCUs (Verified Carbon Units) where 1 VCU equals 1 tCO2e reduced or removed. The Verra registry hosts the project record, the issuance history, and the retirement ledger.

Indonesia is one of Verra's largest national portfolios. As of mid-2026 the country has 66 cross-registered VCS projects with 22.29 million tCO2e cumulative issuances. The methodology mix tilts heavily toward forestry and energy: VM0007 (legacy avoided-deforestation REDD+, 12 projects), ACM0002 (grid-connected renewable electricity, 6), VM0010 (improved forest management, 5), VM0047 (afforestation/reforestation/revegetation, 5), AMS-III.H. (methane recovery, 5), and VM0033 (tidal wetland and seagrass restoration, 3). The headline names sit inside this distribution: Katingan Mentaya (peat REDD+), Rimba Raya (peat REDD+), and the Kampar Peninsula projects all run on legacy avoided-deforestation methodologies.

That last point matters because ICVCM has now drawn a hard line on integrity. The Council approved VM0048 (the new consolidated REDD+ avoided-unplanned-deforestation methodology) for the CCP label in late 2024. It did not approve VM0006, VM0007, VM0009, VM0015 or VM0037. Verra is forcing transition: REDD+ projects on legacy methodologies must requantify under VM0048 to earn CCP status. The implication for Indonesian supply is direct. Roughly a fifth of the country's Verra project count sits on VM0007 today, and those credits are not automatically high quality. The market is splitting into CCP-eligible and non-CCP supply, with a widening price gap. Verra's strength is global liquidity and a transparent registry. Its weakness is that its older REDD+ vintage carries reputational baggage the new label was designed to leave behind.

SRN-PPI at a glance

SRN-PPI (Sistem Registri Nasional Pengendalian Perubahan Iklim) is Indonesia's national climate registry, operated by the Ministry of Environment under Permen LHK 71/2017. It tracks four things: mitigation projects, adaptation actions, climate-finance flows, and carbon-trading units. The unit it issues is the SPE-GRK (Sertifikat Penurunan Emisi Gas Rumah Kaca), Indonesia's domestic compliance-eligible carbon certificate.

SRN-PPI is the gating layer for everything legal in the Indonesian market. To trade a credit domestically, the project must be registered in SRN-PPI, validated under a KLHK-approved methodology, and verified through the national MRV process. Forestry-sector projects are governed specifically by Permenhut 6/2026, issued in April 2026 to implement Perpres 110/2025 in the REDD+, peat, mangrove, and afforestation/reforestation segments.

Two operational realities define how SRN-PPI behaves in practice. First, the post-2024 ministry split — Kementerian Lingkungan Hidup (KLH) and Kementerian Kehutanan (Kemenhut) — has left registry custody and forestry-sector authority straddling two ministries, creating documentation lag the market still complains about. Second, the Article 6 regime took effect domestically when Perpres 110/2025 was promulgated on 10 October 2025, and the Verra-SRN mutual recognition arrangement was signed days earlier (3 October 2025). The MRA is the legal hinge: VCS projects in Indonesia must finalise SRN-PPI registration before completing VCS registration, and VCUs continue to be managed in Verra's registry while key data mirrors into SRN-PPI. International transfer requires a Surat Otorisasi from the Minister of Environment and a corresponding adjustment against Indonesia's NDC ledger.

SRN-PPI's strength is sovereign control: nothing leaves Indonesia without state visibility. Its weakness is registry-side latency and the institutional ambiguity between KLH and Kemenhut.

IDXCarbon at a glance

IDXCarbon (Bursa Karbon Indonesia) is the regulated carbon exchange operated by Bursa Efek Indonesia (BEI) under OJK licence pursuant to POJK 14/2023. It soft-launched on 26 September 2023 and now trades two unit types: SPE-GRK for domestic compliance flow and cross-registered VCS-backed credits authorised through the Verra-SRN MRA. The international segment opened in January 2026 with two new unit types listed at Rp 96,000/tCO2e (IDTBS technology-based solutions) and Rp 144,000/tCO2e (IDTBS-RE renewable energy).

The numbers tell the real story. March 2026 average price was Rp 42,660/tCO2e on 43,117 tCO2e of volume. December 2025 was the largest month on record at roughly 190,000 tCO2e and Rp 7.5 billion in turnover. February 2026 collapsed to just 2,218 tCO2e. Cumulative trading crossed the 1 million tCO2e mark in early 2026, with more than 130 participating entities. The full-scale mandatory compliance launch — the PTBAE-PU allowance trading layer for the power sector — was scheduled for 2026 but is now delayed, with no allowance auctions held through Q1 2026.

IDXCarbon's strength is regulatory legitimacy: OJK supervision, a clearing infrastructure that institutional buyers recognise, and a public price tape. Its weakness is thin and lumpy liquidity. A 2,218-tonne month cannot price 100,000-tonne portfolios reliably. Price discovery exists but should not be confused with depth.

The three across eight dimensions

The stack in practice

Trace a real credit. A peatland REDD+ project in Central Kalimantan develops under VM0048 (post-transition from VM0007). The developer files with SRN-PPI first, gets the project ID under Permenhut 6/2026, then completes VCS registration with Verra. Validation and verification run under VCS rules with Indonesian DOE involvement. Verra issues VCUs into the project account on registry.verra.org. Key issuance data mirrors into SRN-PPI under the MRA.

Now the credit splits by buyer type. A foreign airline buying for CORSIA or a corporate buyer making a VCMI Silver/Gold claim retires the VCU directly in Verra. No corresponding adjustment, no Surat Otorisasi, but the buyer cannot claim it against Indonesia's NDC. An Indonesian power-sector PTBAE-PU obligation buyer uses the SPE-GRK equivalent through IDXCarbon: the unit is locked in SRN-PPI, surrendered against the domestic ceiling, and the Verra-side record is reconciled to prevent double counting. An international Article 6.2 transfer requires the Minister's Surat Otorisasi plus a corresponding adjustment debiting Indonesia's NDC inventory; only then can a foreign sovereign claim the tonne.

The mistakes happen when a developer or broker tries to sell the same vintage into two channels. A VCU retired in Verra for a Microsoft purchase cannot also be surrendered for a domestic PLN obligation. The MRA was specifically designed to close this loophole, but reconciliation is manual and the audit trail is incomplete for pre-MRA vintages.

Where each is strong, where each is weak

Verra wins on liquidity, transparency, and integration with global compliance markets. It loses on Indonesian REDD+ legacy quality — the VM0007 cohort, which produced the bulk of Indonesia's 22 million tCO2e to date, is not CCP-eligible and trades at a discount to VM0048 supply. If you are buying for a serious decarbonisation claim, vintage and methodology dominate registry choice.

SRN-PPI wins on sovereignty and traceability inside Indonesia. Nothing legitimate moves without it. It loses on speed and on institutional clarity: the KLH/Kemenhut split has not settled and the registry's interface lags Verra's by a generation. For developers, SRN-PPI is non-optional, not a competitive choice.

IDXCarbon wins on regulatory legitimacy and price visibility. For an Indonesian PLN or industrial buyer required to surrender SPE-GRK against a future PTBAE-PU obligation, IDXCarbon is the only compliant venue. It loses on depth. A February 2026 print of 2,218 tCO2e is not a market; it is a notice board. Anyone sizing a hedge through IDXCarbon today is taking execution risk that does not exist on Verra's OTC layer.

Three open questions

First, when does PTBAE-PU mandatory allowance trading actually start? It was due in 2026 and is now delayed. Until power-sector compliance demand turns on, IDXCarbon's SPE-GRK volume will stay project-by-project rather than systemic.

Second, how does the Verra-SRN MRA reconcile pre-October-2025 issuances? Tens of millions of legacy VCUs from Katingan, Rimba Raya, and other peat projects sit in Verra accounts with no SRN-PPI mirror. The corresponding-adjustment status of those vintages, if a foreign buyer wants to claim them post-MRA, is unsettled.

Third, will ICVCM-driven supply tightening (VM0048 transition) hit Indonesian project economics hard enough to slow new registrations? Requantification is expensive and many legacy peat projects will not requalify cleanly. If they do not, the supply story revives more slowly than the Fastmarkets-style optimism suggests.

Sekilas

Tiga sistem ini bukan saingan, tapi berlapis. Verra adalah standar internasional yang menerbitkan VCU. SRN-PPI adalah registri nasional Indonesia di bawah KLH/Kemenhut yang menerbitkan SPE-GRK dan menjadi pintu wajib bagi semua proyek karbon domestik. IDXCarbon adalah bursa karbon di bawah OJK tempat unit-unit itu diperdagangkan. Sebuah kredit REDD+ Indonesia bisa lewat ketiganya: terdaftar di SRN-PPI lebih dulu (Permenhut 6/2026), divalidasi oleh Verra, lalu diperdagangkan di IDXCarbon. Pasca-MRA Verra-SRN 3 Oktober 2025 dan Perpres 110/2025, transfer ke luar negeri butuh Surat Otorisasi Menteri dan corresponding adjustment terhadap NDC. Risiko terbesar pembeli: kredit metodologi lama (VM0007) tidak otomatis berlabel CCP ICVCM; likuiditas IDXCarbon masih tipis (Feb 2026: 2.218 tCO2e); dan ambiguitas KLH-Kemenhut pasca-pemisahan kementerian masih memperlambat alur dokumen.

Sources

1. Verra — MRA signed with Indonesia 2. ICVCM — Three REDD+ methodologies approved 3. IDXCarbon — Monthly data 4. KLHK PPID — Wajib urus SRN 5. Fastmarkets — Verra-Indonesia agreement and REDD+ supply 6. Global Legal Insights — GR 110/2025 cross-border procedures 7. Tempo — International trading launch January 2026