Petroleum Resource Rent Tax Act 1987

• Who pays and the cash cost: The statutory payer is any person with taxable profit from a petroleum project; they bear the cash cost equal to 40% of that taxable profit (sections 4–5).

• Incentives and private choices: By applying a 40% tax to taxable profits, the law reduces after-tax returns to those profits (section 5). That mechanical effect can influence private decisions about investment, financing, pricing, ownership stakes or contract terms for petroleum projects — the Act sets the tax liability but does not itself prescribe how businesses must change; those economic responses depend on firms and markets.

• Allocation of administrative detail and discretion: The Act delegates definitional, calculation and assessment detail to the incorporated Assessment Act (section 3). That means the practical compliance obligations, timing, offsets, exemptions and assessment powers will be in that other Act, and implementation depends on how those provisions are drafted and applied.

• Commencement and implementation risk: The tax does not start until the Assessment Act comes into operation (section 2). Any delay or variation in when that Assessment Act takes effect delays implementation of the tax.

• Compliance burden and information needs: The bare imposition here (sections 4–5) signals that the taxpayer must determine "taxable profit" for each year of tax in relation to a petroleum project; the detailed calculation method is in the incorporated Assessment Act (section 3). That cross-reference concentrates substantive compliance and recordkeeping requirements in the Assessment Act.

Practical takeaway

• This Act establishes a statutory 40% tax on taxable profits from petroleum projects (sections 4–5), relies on the Petroleum Resource Rent Tax Assessment Act 1987 for definitions and administration (section 3), and only commences when that Assessment Act comes into operation (section 2).