If your SMSF owns a commercial property and leases it to your own business, a family member’s business, or any entity connected to a fund member, the rent must be at market rate. This is not a suggestion. It is a legal requirement under the Superannuation Industry (Supervision) Act 1993, and the ATO actively investigates non-arm’s length dealings in SMSFs. Getting the rental assessment wrong can result in the income being classified as non-arm’s length income (NALI), taxed at 45% instead of the fund’s concessional rate of 15% (or 0% in pension phase).
This guide explains the arm’s length requirement for SMSF related party leases, what constitutes acceptable evidence, how a rental assessment protects your fund, and the consequences of getting it wrong.
What is a related party lease in an SMSF?
A related party lease exists whenever the SMSF (as landlord) leases property to a tenant who is connected to the fund. Under the SIS Act, related parties include fund members, their relatives, entities controlled by members (companies where a member is a director or holds a controlling interest), partnerships where a member is a partner, and trusts where a member or relative is a beneficiary or trustee.
The most common structure is an SMSF that owns a commercial premises (office, warehouse, retail shop, factory) and leases it to the member’s own business. This arrangement is specifically permitted under Section 71 of the SIS Act for business real property. But the permission comes with a non-negotiable condition: the lease must be on arm’s length terms.
What “arm’s length” means in practice
An arm’s length lease is one where the terms, including the rent, are the same as what would be agreed between unrelated parties dealing at arm’s length. The ATO assesses this by looking at the totality of the arrangement, not just the dollar figure. The key elements the ATO examines are:
Rent. The rent must reflect the market rate for comparable premises in the same location, of similar size, condition, and specification. Below-market rent deprives the fund of income it should be earning. Above-market rent inflates fund income (and potentially inflates contribution caps or member balances). Both directions are problematic.
Lease terms. The lease duration, renewal options, rent review frequency, make-good provisions, and responsibility for outgoings should be consistent with standard commercial practice for that property type and market. A 20-year lease with no rent reviews on a property that market practice would lease for 3+3+3 with annual CPI reviews is not arm’s length.
Formal documentation. The ATO expects a written lease agreement. The ATO flagged in 2026 that the absence of documented lease agreements in audit files is an “area of concern.” A handshake arrangement, even at market rent, creates compliance risk because there is no documentation to verify the terms.
Outgoings and maintenance. Whether the tenant pays outgoings (council rates, water, insurance, body corporate) should reflect market practice. If comparable leases in the area are typically “net” (tenant pays outgoings), but the related party lease is “gross” (fund pays outgoings), the effective rent is below market even if the headline figure looks correct.
Why a rental assessment is essential evidence
The single most effective way to demonstrate arm’s length rent is a professional rental assessment, sometimes called a market rent appraisal. This is an independent analysis of the market rent for the specific property, prepared using comparable rental evidence from the local market.
A rental assessment provides several layers of protection:
For the auditor. The fund’s auditor must verify that related party transactions are conducted at arm’s length. A rental assessment provides the evidence the auditor needs to sign off without qualification. Without it, the auditor may issue a qualified opinion or lodge an Auditor Contravention Report (ACR) with the ATO.
For the ATO. If the ATO reviews the fund’s related party dealings, the rental assessment demonstrates that the rent was set by reference to market evidence, not by the member’s convenience. This is the difference between a clean file and one that triggers further investigation.
For NALI protection. Non-arm’s length income (NALI) rules under Section 295-550 of the ITAA 1997 tax fund income at 45% where it is derived from a non-arm’s length dealing. If the SMSF receives below-market rent from a related party, the entire rental income (not just the shortfall) may be classified as NALI. A rental assessment proving market rent removes this risk entirely.
The NALI consequences: why below-market rent is so costly
The NALI penalty is not proportional to the shortfall. It applies to the entire income stream from the non-arm’s length arrangement. Here is what that looks like in practice:
| Scenario | Annual Rent | Tax Rate | Tax on Rent |
|---|---|---|---|
| Market rent, arm’s length lease | $60,000 | 15% | $9,000 |
| Below-market rent, NALI applies | $45,000 | 45% | $20,250 |
| Pension phase, market rent | $60,000 | 0% | $0 |
In this example, the trustee saved $15,000 in rent by charging below market rate, but the fund paid an additional $11,250 in tax ($20,250 minus $9,000). The fund is worse off by $11,250, the member’s business saved $15,000, but the ATO took the difference and then some. In pension phase, the swing is even more dramatic: below-market rent converts a 0% tax position into a 45% tax position on the entire rental income.
When to get a rental assessment
A rental assessment should be obtained at each of the following points:
- Lease commencement: When the related party lease is first entered into, a rental assessment establishes the initial market rent
- Rent reviews: At each rent review date specified in the lease (typically annually or every 2-3 years). The rental assessment confirms the new rent is at market
- Lease renewal or extension: When the lease is renewed or a new term commences, a fresh rental assessment ensures the terms remain arm’s length
- Annual financial statements: Many auditors now expect annual evidence that the rent remains at market, even if a formal rent review has not occurred. A current rental assessment satisfies this requirement
- Material changes: If the property has been renovated, expanded, or if the local rental market has shifted significantly, a new assessment captures the impact on market rent
Our commercial property valuation reports include a rental assessment as standard, covering both the property’s market value and the market rent. This gives you both compliance documents in a single report for $550.
What goes into a professional rental assessment
A rental assessment analyses the market rent for the subject property by reference to comparable rental evidence from the local market. The report typically includes:
- Description of the subject property (location, size, condition, specifications, fit-out)
- Analysis of at least three comparable rental transactions for similar properties in the area
- Adjustments for differences between the comparable properties and the subject property (size, location, condition, lease terms)
- Conclusion on the market rent expressed as a dollar amount per annum (and per square metre for commercial property)
- Commentary on whether the rent should be net or gross, and what outgoings assumptions apply
GST and related party leases
If the SMSF is GST-registered (compulsory if commercial rental turnover exceeds $75,000), the fund must charge GST on the rent at 10%. The related party tenant pays rent plus GST, the fund remits the GST to the ATO, and the tenant claims the GST as an input tax credit (if GST-registered and using the property for taxable purposes).
The arm’s length assessment should be based on the rent exclusive of GST. The GST is then added on top. Confusing GST-inclusive and GST-exclusive rent is a common error that can make a lease appear below or above market rate when it is actually compliant.
Related party leases during divorce
If fund members are separating, the related party lease adds complexity to the property settlement process. One party’s business may continue to lease the property from the fund even after the other party exits. The lease must remain on arm’s length terms regardless of the personal relationship between the parties. A current rental assessment is essential evidence for both the auditor and the Family Court.
Need a market value and rental assessment for your SMSF commercial property?
Our commercial valuation reports include both market value assessment and rental appraisal in a single report for $550. All Australian locations, delivered within 48 hours.
Frequently asked questions
Yes. The SIS Act specifically permits related parties to lease business real property from an SMSF, provided the lease is on arm's length terms. This includes commercial premises such as offices, warehouses, retail shops, and factories. Residential property cannot be leased to a related party.
The rental income may be classified as non-arm's length income (NALI) and taxed at 45% instead of the fund's concessional rate of 15% (or 0% in pension phase). NALI applies to the entire rental income, not just the shortfall below market rate.
At minimum, at every rent review date specified in the lease. Best practice is to obtain a rental assessment annually when preparing the fund's financial statements, even if a formal rent review has not occurred. Many auditors now expect annual evidence that the rent remains at market.
Yes. The ATO expects formal documentation for all related party dealings. A handshake arrangement, even at market rent, creates compliance risk because there is no documentation for the auditor to verify. The lease should include all standard commercial terms: rent amount, payment frequency, term, renewal options, rent review mechanism, outgoings responsibility, and make-good provisions.
A property valuation assesses the market value of the property (what it would sell for). A rental assessment assesses the market rent (what a tenant would pay to lease it). For SMSF commercial property with a related party tenant, you typically need both. Our commercial valuation report includes both in a single document.
Above-market rent is also a non-arm's length dealing. It inflates fund income artificially and can affect member balances, contribution cap calculations, and Division 296 threshold monitoring. The rent must be at market rate, not above and not below.
Yes. The arm's length requirement applies regardless of whether the fund is in accumulation or pension phase. In fact, the consequences of NALI are more severe in pension phase, because income that would otherwise be tax-free at 0% is instead taxed at 45%.
The fund must still charge market rent. If the business cannot afford to pay market rent, the solution is not to discount the rent. It may be necessary to reconsider the property arrangement, seek alternative premises, or address the business's financial position separately. A below-market lease creates a compliance problem for the fund regardless of the business's circumstances.
