S$25 carbon tax: energy audits under the Energy Conservation Act

Could you produce, today, the energy audit report for your largest industrial building — the one with the date, the qualified assessor's name, and the improvement measures signed off by someone senior?

Most building managers I speak to hesitate at that question. Not because they have done nothing, but because the audit sits in a shared drive, the recommendations were never costed, and nobody has looked at it since the consultant sent the invoice. That gap is where the trouble starts.

The stakes: two markets, one duty, different names

In Singapore, the duty sits under the Building Control Act and is enforced by the Building and Construction Authority (BCA). Owners of existing buildings must conduct regular energy efficiency audits of the building's cooling systems, submit energy use and related building information, and carry out energy audits plus improvement measures if the building is consistently energy intensive. The Energy Conservation Act, administered by the National Environment Agency (NEA), sits alongside this as the framework for industrial energy use and carbon reporting.

In the UK, the equivalent obligation is the Energy Savings Opportunity Scheme, known as ESOS. It applies to large enterprises, runs in four-year phases, and requires an audit of energy use across buildings, transport and industrial processes, signed off by a lead assessor and reported to the Environment Agency.

Different regulators, different names, same underlying question: can you prove, with a dated document, that you know how your buildings use energy and what you are doing about it?

What the inspector actually looks at in an industrial building

Industrial buildings and warehouses are not offices with a bigger roof. The energy profile is dominated by cooling, compressed air, lighting, and process loads, and the people on site are often contractors, shift supervisors and forklift drivers rather than a facilities team with a compliance calendar.

When an auditor or regulator reviews an industrial site, they typically ask for the cooling system audit, the meter data behind the energy use submission, and the list of improvement measures with dates and costs. In Singapore, the BCA's legislation on environmental sustainability for buildings sets out these duties for existing buildings, including the requirement to audit cooling systems and to act when a building is consistently energy intensive.

The failure pattern is consistent. The audit gets done, the report gets filed, and the improvement measures never get a budget line. Two years later, the building is still energy intensive, and the next submission shows no movement.

Who is liable, and what that means for your name

In Singapore, the duty falls on the owner of the building. In practice, that means the director of the owning entity, not the building manager who chases the contractor. The building manager holds the certificates and the reports, but the liability sits above them.

In the UK, ESOS liability sits with the organisation, and the compliance obligation is on the board to ensure a valid audit is completed and the evidence pack is retained. The lead assessor signs the audit, but the directors sign off that it is accurate.

For a portfolio spanning both markets, the practical consequence is this: the person who can answer the regulator's question is rarely the person who holds the legal duty. That gap is where breaches surface.

What a dual-market portfolio should standardise

The temptation is to run two compliance calendars, one for Singapore and one for the UK, and hope neither slips. That works until someone leaves, or a building changes use, or an acquisition brings in a site with no audit history.

What holds up is a single evidence standard applied to every building, regardless of jurisdiction. For each industrial site, you should be able to produce: the current energy audit report with a named assessor, the meter data behind the energy use submission, the improvement measures with cost and owner, and the date the next audit falls due.

In Singapore, the carbon tax rate rose to S$25 per tonne in 2024 and is set to rise to between S$50 and S$80 per tonne by 2030, which means energy intensity is now a direct cost line, not just a compliance box. The Ministry of Sustainability and the Environment has confirmed this trajectory, alongside expanded grant support for SMEs through the Energy Efficiency Grant.

In the UK, ESOS evidence packs are retained for at least two phases, and the audit must cover a twelve-month period. If your portfolio has UK sites, the evidence standard is the same: dated, signed, and traceable to meter data.

The industrial sector accounted for 67 percent of Singapore's total energy consumption in 2014, according to MTI's reply on energy efficiency, and the energy demand growth rate is projected at 1.2 to 1.8 percent per year to 2027. That is the context your board is operating in, whether they have read the audit or not.

Your 60-second self-check

• Could you produce the current energy audit report for every industrial building in your portfolio, with the assessor's name and the date?
• Do you know which of your buildings are classified as consistently energy intensive, and what improvement measures are budgeted?
• If a regulator asked for the meter data behind your last energy use submission, could you retrieve it today?

If you cannot answer all three with confidence, you are exposed. The free 5-minute Director's Risk Check gives you a control score for your portfolio before someone more senior asks for it. You can run the check here and see where your evidence stands.

Herman's verdict

An energy audit that sits in a shared drive and never reaches a budget line is not compliance. It is a document that proves you knew what to do and chose not to do it.

— Herman