ESC

ESC means Energy Savings Certificate, the tradeable certificate used by the NSW Energy Savings Scheme (ESS). The NSW scheme administrator describes one ESC as representing one notional megawatt hour of energy. An ESC is a scheme accounting unit: it is not a measured cash saving, a guaranteed discount or the same unit as a Victorian Energy Efficiency Certificate, which represents a tonne of greenhouse gas emissions reduction.

How is an ESC created?

An Accredited Certificate Provider (ACP) must establish an eligible activity under the ESS Rule, meet the applicable equipment and implementation requirements, identify the nominated energy saver and retain the prescribed evidence. The rule's calculation method determines the number of certificates that may be created. Some methods use defined activity formulas; project-based methods can require more detailed measurement and verification. An invoice or engineering forecast alone does not establish entitlement. The ACP's registration and scheme compliance steps are distinct from a preliminary estimate.

Dates matter. The latest ESS Rule commenced on 7 September 2026, following a rule version effective from 1 July to 6 September 2026. A listed set of new or replacement gas-fired equipment ceased to qualify under the Project Impact Assessment with Measurement and Verification method for implementations on or after 1 July 2026. This is a method- and activity-specific restriction with a July implementation date; it should not be described as a blanket exclusion that first began in September. The applicable version depends on the project and its implementation date.

What is an ESC worth to a project?

ESC prices vary with market conditions and contracts. IPART notes that most sales use direct agreements between an ACP and a buyer, without a standard exchange contract. Scheme participants purchase certificates to meet obligations, while other buyers may also participate. A customer's discount or net proceeds depends on the arrangement with the ACP, charges, timing and the certificates actually registered and sold.

For a business case, show modelled engineering savings, scheme-recognised savings, estimated ESC quantity, assumed price and proposed customer proceeds as separate lines. Record the rule and method version, evidence responsibilities and unresolved conditions. Northmore Gordon's certificate and trading pages provide related context; the ESS entry explains the wider NSW scheme.

Related guidance

Check IPART's ESC guide and current ESS Rule notes.

What does ESC stand for and how is it defined?

ESC stands for Energy Savings Certificate. According to Northmore Gordon, an energy savings certificate (ESC) is a tradeable certificate created under Division 7 of Part 9 of the Electricity Supply Act 1995. Each ESC represents one notional megawatt hour (MWh) of energy savings. ESCs are created by Accredited Certificate Providers under the NSW Energy Savings Scheme for eligible energy-saving activities. As an environmental instrument belonging to its own programme, ESCs should not be compared directly with other certificate types such as ACCUs, VEECs, STCs, LGCs, or REGOs as though they were identical units of emissions reduction or financial value.

How do ESCs differ from other energy-efficiency certificates like VEECs?

ESCs and VEECs belong to different state schemes and use different accounting units. One NSW Energy Savings Certificate represents one notional megawatt hour of energy under the Energy Savings Scheme. One Victorian Energy Efficiency Certificate represents one tonne of greenhouse-gas emissions reduction under Victorian Energy Upgrades. Both can support eligible efficiency projects, but activities, methods, evidence, accreditation and commercial terms differ. Assess the actual jurisdiction and current rule before projecting either certificate type.

What outputs must be kept separate when working with ESCs in an investment case?

When working with ESCs, four outputs must be kept as separate quantities: engineering savings (the modelled expectation of energy reduction before implementation), scheme-recognised savings (the quantity formally acknowledged by the NSW Energy Savings Scheme for the activity), created certificates (the actual ESCs issued under the scheme process), and customer proceeds (the financial revenue the project owner receives after certificate sale and any applicable charges). Failing to separate these quantities can obscure the true project economics and scheme compliance. We recommend showing certificate price and quantity assumptions separately in any preliminary estimate or investment case to support transparent decision-making.

What is a preliminary estimate of ESC creation, and what should it include?

A preliminary estimate is an initial projection of energy savings and certificate creation used for project screening. It should be labelled as preliminary until its assumptions and evidence have been verified. A useful preliminary estimate should state the activity, the applicable NSW Energy Savings Scheme rule version, the energy calculation method, certificate assumptions, the commercial price date and any outstanding conditions. This transparency allows management and advisers to understand which parts of the estimate are based on measured data, engineering analysis, or market assumptions. We recommend requesting the activity, rule version and calculation basis as standard information when evaluating any ESC quotation or feasibility assessment.

What evidence and process establish whether a project can create ESCs under NSW ESS?

An Accredited Certificate Provider must identify an eligible NSW Energy Savings Scheme activity, the applicable ESS Rule and calculation method, the nominated energy saver and the required implementation and evidence records. An installer invoice or preliminary energy estimate does not itself establish ESC entitlement. Baseline and independent M&V review requirements depend on the chosen method; they should not be imposed as a general rule on every ESC activity. If a project uses a project-based measurement and verification pathway, plan the baseline and required professional review before implementation under that method's current guidance. Northmore Gordon can support technical measurement planning and evidence preparation, while the ACP remains responsible for the certificate claim.

How do recent changes to the NSW Energy Savings Scheme Rule affect ESC eligibility?

The latest NSW ESS Rule commenced on 7 September 2026, and the previous version applies to implementations from 1 July through 6 September 2026. Separately, the scheme administrator says listed new or replacement gas equipment ceased to qualify under the Project Impact Assessment with Measurement and Verification (PIAM&V) method for implementations from 1 July 2026. That restriction is specific to the named activities and method; it is not a blanket exclusion of every gas-related energy-saving measure. Check the implementation date, activity, rule version and calculation method together before using a historical case or certificate estimate.

What questions should a project team address before pursuing ESC creation?

Key questions to address early include: What equipment and energy-saving activity are proposed? What is the exact implementation date and why is it the correct date under the method? Who is the energy saver, and how will nomination be documented? Which baseline and operating variables are necessary? What equipment, installation, disposal and commissioning evidence is required? Which professional review and scheme audit steps apply? Recording answers in one project file and assigning clear ownership reduces the risk of missing evidence or eligibility conditions. We can support this screening through project assessment services that connect technical requirements with commercial feasibility.

How should certificate proceeds be treated in a project investment case?

Before relying on ESC proceeds in an investment case, several steps are essential. Request the governing activity and document version, the main eligibility assumptions, the calculation basis, evidence responsibilities and the commercial treatment of certificates. Show certificate price and quantity assumptions separately in financial projections. Confirm whether an amount is an indicative gross value or what the customer would actually receive after agreed charges. We recommend presenting the project with and without conditional ESC support so management understands the decision if certificates are delayed, reduced or unavailable. This approach ensures that the operating merits of the project remain visible and that funding eligibility does not become an unsupported promise in the business case.

What role does Northmore Gordon play in ESC projects and environmental certificate services?

We provide measurement and verification services that support ESC creation, including project-boundary selection, baseline modelling, savings calculation and reporting. We also offer engineering and commercial assessment for environmental certificates, including support for project registration and certificate creation. For clients considering ESC pathways, we conduct energy audits to identify opportunities, delivers feasibility assessments to evaluate scheme eligibility, and provides measurement planning to ensure that credible evidence can be gathered. We emphasise assessing activity eligibility, evidence quality, quantity, ownership and sale terms separately before assuming that certificates will contribute to project economics.

When should a project team engage measurement and verification planning for ESCs?

Plan measurement and verification while a project is being scoped, before installation or commissioning removes baseline evidence. A project-based ESS calculation method may require a defined measurement boundary, representative baseline data and professional review before implementation. Other prescribed activities have different evidence and timing rules, so the pre-implementation independent-review requirement should not be applied automatically to every ESC claim. Select the activity and method with an Accredited Certificate Provider, then document the version, evidence responsibilities and key dates. Northmore Gordon can support M&V planning and technical reporting where that scope is agreed.

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