The Shift Beyond Reporting
The first phase of Singapore’s Scope 3 regime is about disclosure. The second phase — already visible in procurement behaviour — is about selection. When STI companies begin publishing Scope 3 inventories in FY2026, those inventories become inputs to sourcing decisions. A procurement team comparing two suppliers of equal quality and price now has a third variable: carbon intensity. The Singapore Emission Factors Registry’s addition of factors for cleaning, security, and professional services makes this comparison operationally feasible for service categories that previously lacked local benchmarks. Scope 3 data is moving from the sustainability report into the vendor scorecard.
The Services Sector as a Test Case
Services procurement illustrates the shift clearly. Cleaning, security, and professional services are ubiquitous in corporate supply chains, yet they have historically been treated as low-priority categories for emissions measurement. The new SEFR factors change that. A company can now estimate emissions from a cleaning contract using locally derived factors rather than global averages that may not reflect Singapore’s labour-intensive, equipment-dependent service model. Once that estimate exists, procurement teams can set reduction expectations, request efficiency improvements, or prefer suppliers that disclose their own emissions. The factor itself is a technical instrument; its procurement consequence is strategic.
Buyer Pressure as a Decarbonisation Mechanism
The most effective supply-chain decarbonisation lever is not regulation. It is customer demand. When a large listed buyer asks a supplier for emissions data as part of an annual review, the supplier faces a choice: measure or risk losing the account. This dynamic is already familiar in global supply chains where multinational buyers impose carbon disclosure requirements on their vendors. Singapore’s Scope 3 mandate institutionalises that pressure within the domestic market. A listed company cannot meet its own Scope 3 reporting obligations without engaging suppliers, and that engagement inevitably creates expectations that extend beyond a single reporting cycle.
The SME Position
Small and medium-sized enterprises sit at the receiving end of these requests. Most will never file an ACRA climate report, but many will be asked by large customers to provide activity data, energy consumption figures, or product carbon footprints. The practical burden is real, particularly for firms without dedicated sustainability staff. But the opportunity is equally real. An SME that can respond quickly and credibly to a customer’s data request becomes a more attractive supplier. An SME that cannot may find itself at a disadvantage when contracts are renewed. Industry programmes and shared measurement tools — including the expanded SEFR calculator for ICT emissions — lower the entry barrier, but the underlying capability gap remains a competitive differentiator.
What Procurement Integration Looks Like
The companies making the most progress are embedding carbon data into existing procurement workflows rather than treating it as a separate sustainability exercise. Practical steps include adding emissions disclosure clauses to supplier contracts, incorporating carbon intensity into request-for-proposal scoring, and using category-level Scope 3 estimates to prioritise engagement with the highest-impact suppliers. CDL’s reported 50 per cent reduction in Scope 3 embodied carbon for new developments completed in 2025 illustrates what becomes possible when value-chain measurement is integrated into project decisions rather than confined to an annual report. The reduction was achieved through procurement choices — materials, specifications, and supplier engagement — not through accounting adjustments.
The Long Arc of Transparency
Singapore’s Scope 3 regime will be judged ultimately not by the completeness of its first disclosure cycle but by whether emissions data changes behaviour. The early evidence points toward integration: factors are being localised, procurement teams are being equipped with category-level estimates, and buyer pressure is beginning to reach SME suppliers. The transparency era is not a reporting endpoint. It is a market mechanism, and its effectiveness depends on whether the data it produces is used to choose differently.
