Singapore and Mongolia open carbon-credit applications on 30 October, capped at 5 percent

Singapore and Mongolia will open applications for carbon-credit projects on 30 October. Minister of State for Manpower and for Energy, Trade and Industry Foo Cexiang announced the date on Thursday at the Mongolia-Singapore Business Forum.

Authorised projects will generate credits aligned with Article 6 of the Paris Agreement. Singapore companies that pay the carbon tax will be able to use eligible credits from those projects to offset up to 5 percent of their taxable emissions. The same credits may be used against binding climate pledges, including nationally determined contributions, and for other international mitigation purposes. Both governments will review applications together, on a rolling basis. The forms go up on Singapore's Carbon Markets Cooperation website on the day applications open.

This is the sixth implementation agreement under which Singapore has opened a project window. The earlier ones are with Ghana, Bhutan, Peru, Rwanda and Thailand. The legal instrument with Mongolia was signed on 6 October 2025. Thursday's announcement is the operational start, a year and two days later. A signed agreement does not produce a credit. An open application window can.

The 5 percent cap is the constraint that makes the window matter to a taxed firm. Singapore's carbon tax is paid on measured emissions. A company that can tender Mongolian credits against a twentieth of that bill has a defined, limited substitute for paying the tax in cash. It does not have a way to erase the bill. The cap keeps the domestic tax as the main instrument and treats overseas credits as a side door with a width the ministry has already set.

Article 6 is the Paris rulebook's market chapter. It allows a country that hosts a project to authorise a credit for use by another country, and it requires a corresponding adjustment so the same tonne is not counted twice. The Singapore-Mongolia agreement is the bilateral machine for that authorisation. Joint rolling review is how the two governments intend to refuse projects that would fail the adjustment test. No project list exists yet, because applications have not opened.

Mongolia's side of the trade is the land and the activity that would generate the credits. Singapore's side is the demand from tax-liable companies and a civil service that already runs five other windows. Foo's portfolio covers both manpower and energy, trade and industry, which is why a carbon-market date was announced at a business forum rather than only in a climate communique.

The earlier partners show the pattern. Ghana, Bhutan, Peru, Rwanda and Thailand are a mix of African, Asian and Latin American hosts. Mongolia adds a north Asian host with a large land area and a small population, the profile carbon-project developers look at for nature-based and energy projects. The statement on Thursday did not name a methodology. It named a date, a website and a cap.

Firms that want to file on 30 October will need the corresponding-adjustment terms, the crediting period and the fee schedule from the Carbon Markets Cooperation site. Those pages are not live yet. The announcement gives them 21 days from Thursday's forum. A project that is approved will still have to be built before a tonne exists to retire against a Singapore tax return.

The 5 percent limit is the figure a finance director can put in a model now. The rest waits on the window. If the site opens on 30 October as Foo said, Mongolia becomes the sixth place a Singapore taxpayer can look for an authorised credit. If it slips, the 2025 agreement remains a framework without a queue.

Corresponding adjustment is the accounting rule that will decide whether a Mongolian credit is worth anything in Singapore. If Ulaanbaatar authorises a tonne for use abroad, it has to deduct that tonne from its own ledger. A project that looks cheap on a developer's spreadsheet fails if the host will not make that deduction. Joint review is where that refusal would show up. The forum announcement did not say how fast a refusal will be published, only that both sides will read the file.