SBTi 2030 — what corporate net-zero teams need to disclose next year
By January 2027, every company that has committed to the Science-Based Targets initiative (SBTi) — over 7,000 corporates covering 39% of global market cap — will be required to publish a disclosure file proving they are on the trajectory to their 2030 near-term target. Miss it and your target is publicly de-listed. Get it wrong and you're exposed to greenwashing litigation under the EU Corporate Sustainability Reporting Directive (CSRD) and California SB 253.
What "SBTi 2030" actually means
SBTi requires companies to cut their Scope 1 + 2 emissions by 42% absolute versus a 2020 baseline, on the way to net-zero by 2050. Scope 3 (supply chain) gets a separate ambition adjusted to each sector. Every claimed reduction must be:
- Backed by verifiable data — invoices, meter reads, or third-party audit trails.
- Distinguished between abatement and offset. Under the March 2024 SBTi Beyond Value Chain Mitigation (BVCM) update, offset credits can no longer count toward the 42% cut. They can only address residual emissions post-reduction, and must be high-quality removal-heavy instruments.
- Publicly disclosed with unique serial numbers. Every retired credit must be traceable to a public registry entry.
The disclosure file you should be building
For a mid-market corporate (~$1B revenue), the SBTi 2027 disclosure file typically runs 40–80 pages. The parts that are hardest to compile last-minute are:
- Retirement register. A row for every offset credit retired since your baseline year, with issuer, ISIN or registry serial, vintage, methodology, third-party audit firm, and retirement date.
- Removal vs avoidance split. SBTi weights removals (real forest, DACCS) heavier than avoidance (avoided deforestation). Your 2030 residual must be predominantly removal-backed.
- Corresponding-adjustment status. If any credits will be internationally transferred under Article 6.4 of the Paris Agreement, disclosure of the host country's authorisation.
- Reversal risk buffer. Nature-based credits carry non-permanence risk — reforestation can burn, land can be re-cleared. SBTi expects buffer-pool disclosure per project.
Why GreenBelt / UCS is aligned with SBTi 2030
- Removal-heavy by design. UCS is priced on protected hectares × timber stock × time — every unit represents standing biomass, not avoided emissions.
- Public ISIN registry. B3 issues each UCS a unique ISIN code traceable through your /registry page — the exact "unique serial number" SBTi requires.
- Tier-1 audit chain. SGS, TÜV Rheinland, Ernst & Young, ERM — these are the same firms already auditing your financial statements, so your compliance team already trusts the audit output.
- Downloadable signed retirement certificate. Every retirement generates a signed PDF you can drop directly into your SBTi disclosure appendix.
- Reversal buffer built-in. BMV Global withholds 20% of every issuance in a buffer pool — disclosed in the methodology page and audited annually.
The three-year runway
If your company has an SBTi near-term target and hasn't started building the disclosure file yet, you're already behind. The 2027 filing draws on 2020–2026 data — seven years of retirement history. Companies waiting until 2026 to switch to registry-backed instruments will show a gap in their disclosure that regulators and journalists will notice.
The best posture right now: start acquiring a small position in ISIN-anchored, tier-1-audited, removal-weighted UCS — retire them as your Q4 2026 vintage — and publish the retirement certificates as part of your 2026 annual sustainability report. That's a defensible 2027 disclosure.
Open the marketplace to see the seven live BMV projects, or /registry to look up any UCS unit directly on B3.