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STC payments, GST, RCTI and accounting

How installers account for STCs: balance sheet, inventory or revenue

Short answer

There is no single required treatment. Many installers treat STCs they hold as a current asset until sold, recognise revenue when the sale to the trader is made, and show the amount due from the trader as a receivable. Your accountant and your accounting standards decide the detail.

Written and checked by the Energy Merchants desk · Reviewed 3 October 2026 · For installers

Three searches here, one underlying question: where do STCs live in an installer’s accounts? There is no single right answer, because it depends on the business, its accounting basis and what its accountant is comfortable with. This page sets out the common patterns. It is general information, not accounting or tax advice.

What you are actually holding

At different points on a job you can hold three different things:

  1. A right to create STCs, which the customer assigned to you.
  2. Certificates, once the CER registers them and they sit in the registry.
  3. A debt owed by the trader, once you sold them or lodged them for settlement.

Where it sits in your accounts depends on which one you are describing.

The common treatments

As a current asset or receivable

Most small installers do not trade certificates themselves. They lodge claims with a trader, and the amount the trader will pay is, in effect, a receivable. When a claim is lodged and the price is locked, many set up the amount due as “STC receivable” or “STCs awaiting settlement”.

As inventory

An installer that holds certificates in its registry account, waiting to sell, can treat them as inventory held for sale. This is more common where the business self-registers and sells on its own timing. See whether it is worth self-registering.

As revenue

Revenue from STCs is generally recognised when the sale occurs or when the entitlement to payment is established, depending on your accounting basis. The customer’s discount is part of the system sale. The certificate sale to the trader is a separate line.

A simple structure that works

Account Purpose
STC sales (income) Revenue from certificate sales to traders
STC receivable (current asset) Claims lodged and priced but not yet paid
STC clearing (current asset) Holding account while claims are in validation
GST collected GST shown on RCTIs

Reconciling the clearing account to your trader’s statements every month will show you stuck claims before they become old debts.

The end of the financial year

At 30 June the questions are: what is lodged but unpaid, what is registered but unsold and what has been rejected or recalled. Rejected claims may need to be written down. Our guide on clawback shows how recalled certificates affect your position.

From the desk: Keep one spreadsheet or a report in your accounting software listing each claim with job ID, certificates, locked rate, lodgement date and payment date. It is the single document your accountant will ask for.

What this means for installers

Treat STCs as a distinct revenue stream, not a footnote on the job. That helps cash-flow forecasting, since the timing of settlement can differ from the timing of the install by days or weeks. See STC payment terms and how installers manage cash flow.

For entering transactions in practice, read how to record STCs in Xero or MYOB, and see the tax side in do STCs count as income. The pricing page shows how rates and settlement are set up, and how it works shows the claim flow.

Follow-up questions

People also ask

Are STCs inventory?
Some businesses treat certificates held for sale as inventory or a current asset. Others treat the amount owed by the trader as a receivable once a claim is lodged. Ask your accountant which fits your setup.
Do STCs go on the balance sheet?
If you hold certificates or are owed money for them at the reporting date, generally yes, as part of current assets.
When do STCs become revenue?
Usually when the sale to the trader occurs or the right to payment is established, subject to your accounting basis.

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