Income Tax Rates Act 1986

The Rates Act affects every person or entity liable to Australian income tax. Section 3(1) defines “tax” as income tax imposed as such by any Act other than tax payable under listed withholding or specific provisions of the Assessment Act (ss 121H, 126, 128B etc.). “Resident taxpayer” and “non-resident taxpayer” are defined by reference to “prescribed non-resident” status, which in turn excludes persons receiving certain veterans’ or social security pensions for which they are taxed in Australia (s 3(1)).

Individuals are the primary group. Residents receive the progressive Schedule 7 Part I scale; non-residents the less generous Part II scale. Working holiday makers (Subclass 417, 462, certain bridging visas or COVID-19 pandemic event 408 visas — s 3A(1)) are taxed at a flat 15% on the first $45,000 of working holiday taxable income (assessable income derived in Australia while holding the visa, less related deductions, excluding superannuation and termination remainders — s 3A(2)-(3)). Schedule 7 Part III applies these rates in priority, treating the working holiday income as the first slices of ordinary taxable income.

Companies (other than in a trustee capacity) are taxed under s 23. The base rate entity concession (25% instead of 30%) is available only if both the turnover test and the passive income test in ss 23AA and 23AB are satisfied. RSA providers, PDFs and life insurance companies have componentised rates (ss 23(3)-(5), 23A). Recognised medium credit unions receive a concessional cap under s 23(7).

Trustees are affected in multiple capacities. Trustees of resident trusts assessed under s 99 of the Assessment Act pay at individual rates (Schedule 10), subject to the $416 nil-rate threshold and 50% cap for estates of deceased persons dead less than three years (s 14). Trustees liable under s 98 in respect of beneficiaries’ shares are taxed at the rates that would apply to the beneficiary (s 28). AMIT trustees have specific rates under ss 12(6A), 28A and 12(11)-(13). Trustees of complying superannuation funds, non-complying funds, ADFs and pooled superannuation trusts are taxed at the 15%/45% split rates in ss 26, 27 and 27A. Public trading trusts are taxed at the corporate rate (s 25). Managed investment trusts pay 30% on certain income (s 12(10)).

Sovereign entities are taxed at 30% unless another provision of Part III applies (s 30). Non-profit companies enjoy a 55% cap on tax where taxable income does not exceed $762 (base rate entity) or $915 (otherwise) — s 23(6).

The Act therefore casts a wide net: every taxpayer whose taxable income or net income is calculated under the assessment Acts will have the Rates Act applied to determine the final liability.

The Rates Act itself creates few standalone duties or rights; it operates mechanically on amounts calculated elsewhere. The key duty is implicit in s 4’s incorporation rule: taxpayers and the Commissioner must apply the correct rate to each correctly identified component of taxable income or net income. Section 12(1) mandates use of Schedule 7 rates “except as otherwise provided by this Division”, so the duty is to navigate the exceptions in ss 12A-20 and Part III.

Taxpayers have the right to have their tax calculated according to the precise tables and formulas. For example, a resident individual whose taxable income is $40,000 in 2024-25 has the right to the 16% marginal rate on the slice between $18,200 and $45,000 (Schedule 7 Part I item 1). Working holiday makers have the right to the 15% rate on the first $45,000 of working holiday taxable income before the ordinary resident scale applies to any excess (s 3A and Schedule 7 Part III clause 4).

Trustees have specific rights to the concessional treatment in s 14 (no tax on the first $416 of certain deceased estates) and the Commissioner’s discretion to reduce tax under ss 13(5), 13(8) and 15(6) where multiple trusts are involved and the phase-out limit is not exceeded. The Commissioner must have regard to the matters listed in s 13(9) when exercising that discretion.

Primary producers have the right to averaging relief under s 12A, which substitutes a smoothing rate calculated by reference to the averaging adjustment and averaging component (both defined by reference to ITAA 1997 ss 392-75 and 392-C).

Rights are protected by the incorporation of the Assessment Act. Any dispute about which rate applies is therefore a dispute about the proper construction of the Rates Act read with the assessment provisions. Taxpayers also have the right to have part-year residency status recognised under s 20, which adjusts the tax-free threshold according to the statutory formula.

The Rates Act contains no independent penalty regime. Section 3(1) expressly excludes from the definition of “tax” any amount payable under the listed specific provisions of the Assessment Act (e.g. withholding tax under s 128B). Enforcement therefore occurs under the general machinery of the Taxation Administration Act 1953, particularly Division 2 of Part IIIB (penalties for failure to withhold) and the uniform penalty regime in Schedule 1.

Failure to pay tax calculated at the correct rate under this Act will attract the general interest charge (GIC) under s 8AAB of the Administration Act. Shortfall penalties under Subdivision 284-B of Schedule 1 may be imposed if the taxpayer’s return adopts an incorrect rate through recklessness or intentional disregard. Because the Rates Act is incorporated with the Assessment Act, an under-payment arising from misapplication of, say, the base rate entity test in s 23AA can found a Part IVC objection and subsequent appeal to the Federal Court.

Trustees assessed under s 98 or s 99 of the Assessment Act at the rates in Schedule 10 are subject to the same collection and recovery mechanisms as any other taxpayer. The Commissioner’s power to reduce tax under ss 13(5) and 15(6) is administrative and not subject to penalty; however, an incorrect exercise could itself generate a shortfall.

No-TFN contributions income taxed at the elevated rate under s 29 carries the same administrative penalties for late payment as ordinary tax. There are no specific offences created by the Rates Act itself.

Section 4 provides that the Assessment Act “is incorporated, and shall be read as one, with this Act”. Every rate therefore operates on concepts defined in the Income Tax Assessment Act 1936 or the Income Tax Assessment Act 1997. The definition of “taxable income” in s 3(2) refers to taxable income of the year of income; “net income” is the net income of the trust estate under s 95 of the Assessment Act.

The Rates Act constantly cross-references the ITAA 1997. “Complying superannuation fund”, “low tax component”, “non-arm’s length component”, “RSA component”, “AMIT”, “managed investment trust”, “sovereign entity” and “tax offset” all take their meaning from the 1997 Act (s 3(1)). Maximum tax rate provisions listed in the definition of that term are all ITAA 1997 or Transitional Provisions Act sections (ss 82-10, 301-95 etc.).

Division 6AA of Part III of the Assessment Act is central to ss 13 and 15; the $416 threshold and eligible taxable income concepts are taken directly from that Division. Primary production averaging under s 12A is entirely derivative of Subdivision 392-C of the ITAA 1997.

The Income Tax Act 1986 imposes the tax that the Rates Act then rates. Without the Rates Act there would be no rate to multiply by taxable income. The Taxation Administration Act 1953 supplies the machinery for collection, objections, reviews and penalties.

State and Territory laws are irrelevant to the rates themselves, but payroll tax or land tax statutes sometimes adopt ITAA concepts by reference, indirectly importing definitions used in the Rates Act.

The document contains three different resident individual rate tables reflecting staged rate cuts. For 2024-25 and 2025-26 the lowest marginal rate above the tax-free threshold is 16% (Schedule 7 Part I). From 2026-27 it drops to 15%, and from 2027-28 to 14%. The 30%, 37% and 45% brackets remain unchanged but the thresholds are fixed in the statute. These reductions were enacted to deliver bracket creep relief and improve incentives to work.

The working holiday maker rate table was inserted to implement the 15% flat rate on the first $45,000 of Australian earnings, replacing an earlier 32.5% rate. The change was designed to make Australia more competitive for backpacker labour while still collecting more tax than the previous tax-free threshold regime.

The base rate entity regime in ss 23AA and 23AB was introduced to replace the former “small business entity” 28.5% rate with a 25% rate available to a broader class of companies provided passive income does not exceed 80%. The 80% test and the legislative instrument power in s 23AB(3) reflect ongoing policy concern about integrity of the lower corporate rate.

Insertion of specific AMIT rates (ss 12(6A), 28A, 12(11)-(13)) and the sovereign entity rule (s 30) responded to the managed investment trust reforms and the need to tax foreign government investment vehicles at a flat 30%. The COVID-19 pandemic event 408 visa was added to the working holiday maker definition in s 3A(1)(d) as a temporary pandemic response.

Each change has been effected by amending the Rates Act rather than the assessment Acts, preserving the traditional separation between the rate-declaring statute and the liability-creating statute.

The source text does not refer to any decided cases. However, the structure of the Act itself reveals likely areas of contention. The definition of “prescribed non-resident” in s 3(1) carves out persons receiving veterans’ or social security payments “in respect of which the person is liable to be assessed and to pay income tax in Australia”. Disputes can arise about whether a particular pension satisfies the “liable to be assessed” limb, especially where the pension is exempt under another provision.

The phase-out formulas in ss 13(10), 14(3) and 15(8) contain rounding-down rules and complex fractions. Litigation has historically occurred around whether the Commissioner’s discretion under ss 13(5) and 15(6) has been exercised on irrelevant considerations or without regard to the mandatory matters in s 13(9). Because the discretion is expressed to be “in the opinion of the Commissioner” and must have regard to prior reductions granted to other trusts, challenges typically allege failure to take into account a relevant consideration listed in s 13(9)(a)-(c).

The base rate entity passive income definition in s 23AB is highly prescriptive. Controversy exists around whether a distribution that is both a “non-portfolio dividend” and a franked distribution is excluded, and the precise scope of the carve-outs for financial institutions and credit licensees in s 23AB(2). The legislative instrument power in s 23AB(3) has not yet been exercised but could itself become the subject of judicial review.

Working holiday maker status under s 3A turns on visa status at particular times. Disputes arise when a taxpayer holds multiple visas or a bridging visa and the “most recent visa” test in s 3A(1)(c)(iii) is contested. Because working holiday taxable income is calculated on a source-and-time basis, apportionment litigation is inevitable.

The special income component definition in s 3(1) contains an ordering rule that can produce circularity when superannuation remainders, employment termination remainders and abnormal income amounts together exceed taxable income. Although the text provides a mechanical reduction, the interaction with averaging under s 12A has produced disputes about the correct “average income” figure to insert into the formula in clause 3 of Schedule 7 Part I.

Because the Act is incorporated with the Assessment Act, any challenge to the rate applied is heard as a challenge to the assessment under Part IVC of the Administration Act. The Federal Court has jurisdiction to determine the proper construction of the Rates Act provisions.

Most practitioners miss that the tax-free threshold is statutorily fixed at $18,200 in s 3(1) but is automatically prorated for part-year residents under the formula in s 20(1). The $4,736 floor in that formula is not indexed and can produce anomalous results for short-term residents.

The base rate entity test in s 23AA is applied at the end of the income year. A company that expects to be a base rate entity but fails the 80% passive income test because of an unexpected franked dividend distribution loses the 25% rate for the entire year — there is no pro-rata or Commissioner discretion.

Working holiday maker rates in Schedule 7 Part III apply only to “working holiday taxable income” as defined in s 3A(2). Any Australian-source income derived before the visa was granted or after it expired is taxed at ordinary resident or non-resident rates. The definition excludes superannuation and termination remainders, which are taxed at the 45% rate regardless.

The resident phase-out limit and non-resident phase-out limit in ss 13(10) and 15(8) are recalculated every year because they depend on the highest and lowest rates in the applicable Schedule 7 table. The 66% figure used in the formulas is a statutory relic; any future change to marginal rates will automatically adjust the phase-out thresholds.

Trustees assessed under s 98 on a minor’s eligible taxable income can obtain a discretionary reduction under s 13(5) or (8) only if the Commissioner forms the opinion that it is “fair and reasonable”. The matters the Commissioner must consider in s 13(9) include reductions previously granted to the same beneficiary from other trusts. Failure to disclose those prior reductions can lead to the reduction being disallowed on review.

The 45% rate on the non-arm’s length component of a complying superannuation fund (s 26(1)(b)) applies even if the fund is otherwise taxed at 15%. There is no de minimis and no ability to net the component against losses in the low tax component.

Sovereign entities are taxed at a flat 30% under s 30 “unless another provision of this Part sets the rate”. Because s 30 is the last provision in Part III, it operates as a default only where no more specific rate (for example, the 15% rate for complying superannuation class income of a life insurance company that happens to be sovereign) applies.

The Commissioner’s opinion under s 14(2) that no tax is payable on the first $416 of certain deceased estates is not a discretion; the Act states “no tax is payable”. Many returns incorrectly apply the 45% rate to small estates of recently deceased persons.

Compliance begins with accurate identification of every component of taxable income or net income. For an individual, segregate ordinary taxable income, superannuation remainder, employment termination remainder, abnormal income amount and, if applicable, working holiday taxable income (s 3(1)). Apply the Schedule 7 tables in the correct order: working holiday income is counted first against the lowest brackets (clause 4 of Part III of Schedule 7).

Companies must self-assess base rate entity status at year-end. Calculate aggregated turnover under the ITAA 1997 definition and test base rate entity passive income against the exhaustive list in s 23AB(1), applying the financial institution and equity return carve-outs in s 23AB(2). The 25% rate in s 23(2)(a) applies only if both tests are passed; otherwise the full 30% rate applies to the entire taxable income.

Trustees must identify the correct paragraph of s 98 or s 99 of the Assessment Act and apply Schedule 10 or 10A rates. For minors, isolate the eligible part to which Division 6AA applies and apply the 45% rate in ss 13 or 15, subject to the phase-out caps. Retain evidence of all prior reductions granted to the same beneficiary so that the Commissioner can apply s 13(9) correctly.

Superannuation funds must separately account for the low tax component, non-arm’s length component and no-TFN contributions income. The 15% rate applies only to the low tax component of a complying fund; the 45% rate on no-TFN contributions is calculated under the three-step formula in s 29(2) that adds 2% to the top marginal rate and subtracts the normal concessional rate.

Part-year residents must apply the s 20 formula to reduce the tax-free threshold. The formula protects $4,736 and scales the balance by months of residency; eligible pensioners defined in s 16 are wholly exempt from proration.

All taxpayers should maintain records sufficient to identify each income component, visa status at the time income is derived, and (for trusts) the residency of beneficiaries. Because the Rates Act is incorporated with the Assessment Act, the general record-keeping obligation under s 262A of the Assessment Act applies. Electronic tax return software that automatically applies the correct Schedule 7 table for the lodgment year is advisable, but the ultimate responsibility remains with the taxpayer or trustee to classify each amount correctly before the software is engaged.

Where averaging relief under s 12A is available, the smoothing adjustment and averaging component must be calculated under the ITAA 1997 rules before the formula rate is applied. Primary producers should lodge provisional tax estimates that reflect the expected averaging rate rather than the ordinary marginal rates.

Finally, because many rates are now year-specific, compliance systems must load the correct table for the year of income. Using the 2024-25 table for a 2027-28 return will produce an incorrect assessment that will be adjusted on audit with GIC and potential shortfall penalties.