What Is the National Tax Equivalent Regime?

The National Tax Equivalent Regime is an intergovernmental arrangement, in force since 1 July 2001, under which listed state and territory government-owned enterprises calculate income tax as though they were private companies and pay the equivalent amount to the treasury of the state or territory that owns them.¹ The Australian Taxation Office handles the technical administration, but the money never reaches the Commonwealth.²

Why the Regime Exists

Section 114 of the Australian Constitution prevents the Commonwealth from imposing tax on property belonging to a state. A state-owned electricity generator or water utility is therefore exempt from federal income tax, giving it a cost advantage that a private competitor in the same market does not have.

The Commonwealth’s competitive neutrality policy states that government business activities should not enjoy net competitive advantages over private sector rivals simply because of public ownership.³ Removing the constitutional exemption would require a referendum. A tax equivalent regime achieves the same commercial result without one: the exemption stays intact, but the entity calculates and pays what a private taxpayer would have owed.

The regime was foreshadowed in the 1999 Intergovernmental Agreement on the Reform of Commonwealth-State Financial Relations and took effect on 1 July 2001.⁴ Before then, each state and territory ran its own arrangement, with inconsistent rules. A single national regime meant one administrator and calculations based on actual federal tax law.

Which Entities Are Covered

An NTER entity is a state or territory government-owned enterprise listed on the central register maintained under the regime.⁴ In practice the listed enterprises are the larger commercial operations: energy retailers, water corporations, port authorities, and public transport bodies that compete with, or could compete with, private firms.

Each government decides which of its enterprises to nominate. Nomination usually depends on whether the entity has a clear commercial objective and earns significant revenue from selling goods or services. The Competition Principles Agreement reinforces this by requiring agencies that undertake significant business activities to pay all applicable taxes or tax equivalents.³ Smaller statutory authorities whose primary function is regulatory or non-commercial are generally not listed. An entity that moves out of commercial activity, or is privatised, comes off the register.

How the Tax Is Calculated

The regime does not create its own tax code. It applies existing federal tax legislation notionally to each NTER entity, as though the entity were a private corporate taxpayer.¹ The principal statutes are the Income Tax Assessment Act 1936 and Income Tax Assessment Act 1997, which together determine assessable income, allowable deductions, and taxable income; the Fringe Benefits Tax Assessment Act 1986, which values non-cash employee benefits; and the Taxation Administration Act 1953, which governs lodgment, instalments, penalties, and objections.

Because the regime borrows federal law wholesale, any amendment to those Acts flows through automatically. A change to a depreciation rule or a new tax offset is picked up without separate NTER drafting.

The standard corporate rate applied to larger NTER entities is 30 percent. Entities that qualify as base rate entities, with aggregated turnover below $50 million and no more than 80 percent passive income, are assessed at 25 percent. These rates mirror the rates that apply to private Australian companies for the 2025-26 income year.

Where the Money Goes

Every dollar of tax equivalent payments, including instalments, balancing payments, penalties, and interest, goes directly to the treasury or revenue office of the owning state or territory.² The NTER Manual is explicit that no NTER-related debt should be remitted to the Commissioner of Taxation.

The Commissioner still provides the technical administration. Under the Memorandum of Understanding between the Commonwealth, all states and territories, and the Commissioner, the ATO assesses each entity’s income tax equivalent liability, reviews returns, and can undertake compliance assurance activity.¹ The ATO never handles the money. For the owning government, these payments function like dividend-adjacent revenue, reducing the entity’s profit by the same tax cost a private competitor would bear and topping up consolidated revenue.

Lodgment and Payment Cycle

NTER entities follow a cycle modelled on the pay-as-you-go (PAYG) instalment system that private companies use. Specifics are updated each year in a lodgment circular issued with the NTER Manual.

Instalments

Entities pay either monthly or quarterly instalments of their expected liability. The process follows Division 45 in Schedule 1 to the Taxation Administration Act 1953, adapted so payments go to the relevant state or territory treasury.² Reporting and payment are due by the 21st day of the month following each instalment period. If that date falls on a weekend, the deadline shifts to the next business day without penalty. Entities must also lodge their monthly PAYG instalment reports with the ATO, which uses the data to track compliance and reconcile against the annual return.¹

Annual Returns and Balancing Payments

Annual returns are lodged with the ATO by the date set in each year’s lodgment circular, which is typically issued in July. For entities that were taxable in the prior year, balancing payments are generally due by 1 December, ahead of the return lodgment deadline of 31 January (or 15 January for entities that lodge directly rather than through a tax agent). Entities that were non-taxable in the prior year, and new registrants, face a combined lodgment and payment deadline of 28 February.² Once the ATO reviews the return, any difference between instalments already paid and the final assessed liability produces either a balancing payment owed to the state treasury or a credit carried forward.

Objections and Compliance

An NTER entity that disagrees with an assessment can lodge a formal objection. The objection must be in writing and filed within the period specified in Section 14ZW of the Taxation Administration Act 1953. For a deemed assessment, the window is four years from the date of that assessment.¹ Private rulings are available, and a decision on a private ruling can itself be objected to within the same framework.

The ATO has authority to conduct compliance assurance measures against NTER entities under an agreed work plan, functioning similarly to the audits and reviews it conducts for private taxpayers. Any penalties and interest arising from compliance activity are payable to the state or territory treasury, not the ATO.²

1
Revenue NSW. National Tax Equivalent Regime
2
Tasmanian Department of Treasury and Finance. Manual for the National Tax Equivalent Regime May 2025
3
Australian Treasury. Commonwealth Competitive Neutrality Policy Statement
4
Australian Taxation Office. ATO National Tax Equivalent Regime