Entity Setup
Entity Setup & Compliance: Navigating Australia's BEPS-Driven Thin Capitalisation and Private Group Rules
With Australia’s recent rules for BEPS action 4 and thin capitalisation, entity structuring must be sharper than ever—here’s how private groups can set up compliant, efficient entities.
By NomadicTax Research Team • 5-8 min read • March 12, 2026
## Key Changes in BEPS and Thin Capitalisation Rules
Australia has aligned its **Interest Limitation and Thin Capitalisation rules** with the OECD’s Base Erosion and Profit Shifting (BEPS) Action 4. These changes affect private groups, multinational companies, and foreign-controlled entities. ([ato.gov.au](https://www.ato.gov.au/businesses-and-organisations/international-tax-for-business/private-wealth-international-program/new-international-tax-measures-affecting-private-groups?utm_source=openai)) The **Debt Deduction Creation Rules (DDCR)** further restrict the ability to claim interest or finance deductions when using internal or related party loans. ([ato.gov.au](https://www.ato.gov.au/businesses-and-organisations/international-tax-for-business/private-wealth-international-program/new-international-tax-measures-affecting-private-groups?utm_source=openai)) These changes are now law and apply from **income years starting on or after 1 July 2023**. Businesses must review their debt structures, fund flows, and related party transactions.
## What Private Groups Need to Review During Entity Setup
- **Debt levels and structure:** Ensure debt is genuinely external or meets arm’s-length tests; avoid internal debt structures aimed for aggressive debt-deduction.
- **Associate relationships:** Related entities are grouped for debt deduction thresholds—private groups need to assess associate inclusions. ([ato.gov.au](https://www.ato.gov.au/businesses-and-organisations/international-tax-for-business/private-wealth-international-program/new-international-tax-measures-affecting-private-groups?utm_source=openai))
- **Dividends, capital returns, and distributions:** The DDCR can deny deductions for debt created to fund those. Entities must plan distributions or returns of capital carefully.
- **Cross-border investments:** Foreign-controlled entities must consider how thin capitalisation interacts with foreign income, withholding and treaty obligations.
## Compliance Steps for Existing Entities & New Setups
- Conduct a **structure audit**: map all related entities, loans, and internal funding flows.
- Model the effect of interest-limitation: simulate what deductions might be disallowed or adjusted under the DDCR.
- Establish or document arm’s-length terms—proper agreements, interest rates, security, covenant compliance.
- Super-charge governance: board oversight, limit aggressive risk-taking, track changes to law and ensure contemporaneous documentation.
## Practical Example
A private group comprises three companies: one in Australia, two overseas; the Australian entity borrows from one overseas related entity to fund asset purchases and then distributes profits. Under DDCR, some interest deductions may be denied, and the group may incur top-up taxes under global minimum tax rules. Revising to borrow from unrelated third parties, or limiting related-party interest, could avoid issues.
## Looking Ahead & Risk Areas
- **Audits and enforcement** are increasing in priority, especially by the ATO’s Tax Avoidance Taskforce, which has been funded for extension from **1 July 2026**. ([ato.gov.au](https://www.ato.gov.au/media-centre/commissioners-address-to-the-cta-heads-of-tax-forum?utm_source=openai))
- **Penalties & interest** for mischaracterised transactions or incorrect valuations are rising. Consider external valuations and conservative estimates.
**Takeaway:** Setting up an entity or running a private group in Australia now requires careful planning around structure, financing, and compliance with BEPS and thin capitalisation rules. Proactive review and documentation could save significant tax and risk exposure.