Updated: October 2025 (Originally published: April 2009)
Some legal expenses may be deductible under the Income Tax Assessment Act 1997 (Cth) (“ITAA”) if they’re connected to earning assessable income or running a business. Whether you’re resolving a contract dispute, defending an employment claim, or managing investment issues, understanding what you can claim helps reduce your tax bill and stay compliant.
This comprehensive guide has been updated for the 2025 financial year to help you navigate the complex rules around legal expense deductions, including the often-overlooked Section 40-880 “blackhole expenditure” provisions that can save your business thousands of dollars.
Quick summary: key takeaways
Can I claim legal fees on tax in Australia? Yes, if directly connected to producing assessable income or carrying on a business. Here’s what you need to know:
✅ Deductible: Business operation legal costs, employment contract disputes, defending defamation related to work, tax advice fees
❌ Not Deductible: Personal legal matters (divorce, wills), fines and penalties, acquiring capital assets
💡 Key Rule: Tax advice fees are deductible only if they relate to managing your own tax affairs (s 25-5 ITAA). Section 40-880 allows deductions for business capital costs that aren’t otherwise deductible.
📊 Business Capital Costs: Under s 8-1 ITAA 1997, a taxpayer can deduct a loss or outgoing to the extent it is incurred in gaining or producing assessable income or carrying on a business for that purpose, provided it is not capital, private or domestic in nature, and not related to exempt income.
Table of contents
- Understanding tax-deductible legal expenses
- Revenue vs capital expenses: the key distinction
- Deductible legal expenses: complete list
- Non-deductible legal expenses
- Specifically recognised deductible legal expenses
- Section 40-880: Business capital expenditure deductions
- Record keeping requirements
- Practical considerations
- Frequently asked questions
- Resources and further information
1. Understanding tax-deductible legal expenses in Australia
Legal expenses can represent a significant cost for businesses and individuals, but many of these costs may be tax deductible under the Income Tax Assessment Act 1997 (Cth) (“ITAA”). Understanding which legal expenses qualify for deduction can help reduce your tax liability and improve cash flow.
The basic test for tax deductibility
The fundamental principle governing legal expense deductibility remains the distinction between revenue and capital expenses. Legal expenses are generally deductible if they arise out of the day to day income earning activities and the legal action has more than a peripheral connection to the taxpayer’s income producing activities.
For individuals: Legal expenses must be directly linked to generating assessable income (such as rental income, investment income, or employment income).
For businesses: Legal costs incurred in the ordinary operation of a business to produce assessable income are generally allowable as deductions.
2. Revenue vs capital expenses: the key distinction:
Capital expenses usually relate to acquiring or creating long-term assets such as property or equipment. These are not immediately deductible but may be claimable over time under Section 40-880.
Revenue expenses (generally deductible)
Revenue expenses are ongoing costs of running a business or earning income:
- Costs arising in the course of earning assessable income
- Expenses incurred in ordinary business operations
- Costs relating to maintaining existing income-producing assets
- Day-to-day operational legal matters
Capital expenses (generally non-deductible)
Capital expenses relate to acquiring or creating assets with enduring value:
- Costs of acquiring business assets or property
- Expenses for business establishment or expansion
- Creating new income-producing structures
- Acquiring rights with long-term benefit
3. Deductible legal expenses: complete list:
Employment and workplace legal costs
You may be able to claim legal costs for enforcing a right to income under section 8-1, even if the expense arises after your employment ends — provided the costs are directly connected to earning income.
Deductible employment legal expenses include:
- Negotiating or disputing existing employment contract terms
- Defending wrongful dismissal claims (as an employer)
- Pursuing unpaid wages or bonuses owed under contract
- Employment disputes related to income-producing activities
Business defence and protection costs
You may be able to claim a deduction for legal costs to defend a defamation claim if the matter is directly linked to your work or business income, under section 8-1 of the Income Tax Assessment Act 1997 (Cth).
Deductible business defence costs include:
- Defending trademark or patent infringement claims – only deductible if protecting existing income-producing assets, not creating new ones.
- Business-related defamation defence
- Protecting business methods and practices
- Debt recovery legal costs
Other commonly deductible legal expenses
- Legal costs for ongoing business operations
- Contractual disputes related to business income
- Defending business practices that generate income
- Legal advice on business tax matters
4. Non-deductible legal expenses:
Personal and private legal matters
Personal legal costs, such as divorce or estate planning, are generally not deductible unless they directly relate to earning income:
- Divorce and family law proceedings
- Preparing wills and estate planning
- Personal injury claims (non-work-related)
- Conveyancing for personal residence
Capital and structural legal costs
Defending a right to practise a profession or employment is capital in nature, as the right to practise is considered a structural asset and the associated expenses are incurred to protect this right. Therefore, such expenses are not deductible.
Non-deductible capital costs include:
- Obtaining professional licences or qualifications
- Establishing right to practice a profession
- Acquiring business assets or property
- Creating enduring business structures
Employment matters that are not deductible
If the legal action goes beyond a claim for a revenue item such as wages, and constitutes an action for a breach of the contract of employment where the essential character of the advantage sought relates to a long-term business advantage, the legal costs would not be deductible.
Non-deductible employment legal costs:
- Negotiating new employment contracts with a new employer
- Defending personal driving charges (even if work-related)
- Sexual harassment or discrimination defence costs – may be deductible for the employer, not for an individual employee. Employers may claim deductions for defending such claims if directly related to employment operations.
- Disputing redundancy payouts
- Evicting tenants after lease expiry
Fines and penalties
Fines and penalties are never deductible, though legal costs defending against fines may be deductible in certain circumstances.
5. Specifically recognised deductible legal expenses
The ITAA provides specific deduction provisions for certain legal expenses, even if they might otherwise be considered capital or non-deductible.
Borrowing costs for income-producing loans (Section 25-25 ITAA 1997)
Legal costs and other borrowing expenses such as loan establishment fees, title search fees and mortgage stamp duty are deductible when the borrowed money is used wholly for income-producing purposes. If total borrowing expenses (excluding interest) exceed $100, you must deduct them over the shorter of the loan term or five years. If the total is $100 or less, you can deduct them immediately.
Key points:
- Applies only if borrowed funds are used to earn assessable income
- If a loan is partly private, the deduction must be apportioned
- The $100 threshold determines whether the deduction is immediate or spread
- Interest is deductible under section 8-1 in the year it is incurred
- Includes legal fees for loan documentation and establishment
Lease preparation and registration costs (Section 25-20 ITAA 1997)
Expenses incurred in preparing, registering or stamping a lease are deductible when the leased property is used, or intended to be used, for producing assessable income. The deduction applies to both lessors and lessees where the property is used in a business or other income-earning activity.
If the lease is partly for private and partly for income-producing purposes, the deduction must be apportioned to reflect the income-producing use.
Key points:
- Applies to lessors and lessees where the lease relates to an income-producing property
- Covers lease preparation, registration and stamping costs
- The property must be used, or intended to be used, to earn assessable income
- Costs associated with private or domestic property are not deductible
- Legal fees for reviewing or preparing lease documentation are included
Tax-related legal expenses (Section 25-5 ITAA 1997)
Expenses incurred in managing your tax affairs are specifically deductible under section 25-5 of the Income Tax Assessment Act 1997 (Cth). This includes legal costs paid to prepare, lodge or dispute your tax obligations, provided the costs are not of a private or capital nature.
These deductions apply to both individuals and businesses. However, expenses related to tax avoidance schemes, penalties or interest on late payments are not deductible.
Key points:
- Covers costs for managing your tax affairs, including advice and representation
- Includes legal fees for preparing or lodging tax returns, or disputing ATO assessments
- Deductible when incurred for compliance or management purposes, not for tax avoidance
- Applies to both individuals and businesses
- Legal costs must relate directly to your own tax affairs
6. Section 40-880: Business capital expenditure deductions
Section 40-880 lets businesses claim certain capital expenses over five years if they can’t be deducted elsewhere. These are often called ‘black-hole’ expenses.
The deduction applies where the expenditure is incurred in relation to a business that is, was, or is proposed to be carried on for a taxable purpose. This means the business must be run to earn assessable income.
Standard five-year write-off
You can deduct eligible capital expenditure in equal proportions over five income years beginning in the year it is incurred. Examples include:
- Business establishment costs
- Business structure setup costs
- Feasibility studies and professional advice
- Costs to wind up or deregister a company, partnership or trust
- Expenses for business restructuring or conversion
Deduction rate: 20% per year on a straight-line basis.
Immediate deduction for small business start-ups
Small business entities with an aggregated turnover under $50 million may deduct eligible start-up expenses immediately if they are incurred in relation to establishing a proposed business. Immediate deductions may include:
- Professional advice on the proposed business structure or operations
- Government fees and charges for business establishment
- ASIC registration and incorporation fees
This immediate deduction also applies to medium businesses for expenses incurred from 1 July 2020.
Expenditure not deductible under Section 40-880
You cannot claim a deduction under Section 40-880 for expenditure that:
- Forms part of a depreciating asset’s cost
- Is deductible under another provision of the ITAA
- Is private, domestic or relates to exempt or non-assessable non-exempt income
- Relates to acquiring land or a CGT asset
- Is capital expenditure incurred in relation to earning exempt income
7. Record keeping requirements
Proper record keeping is essential to substantiate deductions for legal expenses. The ATO requires taxpayers to keep written evidence that shows the expense was incurred and how it relates to producing assessable income.
ATO rules
You must keep records for at least five years after lodging your tax return. If your total deductions are over $300, you’ll need written proof such as invoices or receipts.
Records must be in English or readily translatable into English.
If the expense is partly private and partly business-related, records must clearly show how the business portion was calculated.
Recommended records
- Tax invoices from law firms or service providers
- Proof of payment (receipts, bank statements, or remittance advices)
- Description of legal services provided
- Correspondence showing the nature and purpose of the matter
- Documents linking the expense to income-producing activities
Best practices
✅ Request itemised invoices that describe the work performed
✅ Keep both digital and hard copies of all records
✅ Note the business or income-related purpose for each legal expense
✅ Clearly separate personal and business legal costs
✅ Use accounting software to track and categorise legal expenses throughout the year
8. Practical considerations
The deductibility of legal expenses depends on the specific circumstances of each case. The key factors to consider are:
- The nature and purpose of the expense
- The connection between the expense and income-producing activities
- Whether the expense is revenue or capital in nature
- Whether any specific deduction provisions apply
If a legal expense relates partly to business and partly to private or capital purposes, the cost must be apportioned based on a reasonable method that reflects the extent of its connection to producing assessable income.
When to seek professional advice
You should consider obtaining professional tax advice when:
- Legal expenses are significant (for example, over $10,000)
- The matter includes both business and personal components
- It is unclear whether the expense is capital or revenue in nature
- You intend to claim deductions under Section 40-880
- The expense relates to a business acquisition, restructure or winding-up
- The matter spans multiple financial years or entities
Common mistakes to avoid
❌ Claiming personal or private legal costs as business deductions
❌ Failing to keep sufficient records or invoices
❌ Not apportioning expenses between business and private use
❌ Assuming all business legal costs are immediately deductible
❌ Claiming fines or penalties
❌ Overlooking Section 40-880 deductions for business capital costs
Tax planning tips
💡 Time the payment of large legal expenses strategically across financial years
💡 Keep detailed records explaining the business purpose of each expense
💡 Request separate invoices for distinct legal matters
💡 Review eligibility for Section 40-880 capital deductions
💡 Consider start-up and restructuring deduction options
💡 Maintain evidence linking each legal cost to income-producing activities
Because the treatment of legal expenses often depends on fine distinctions in law and fact, professional advice can ensure correct tax treatment and reduce the risk of ATO review.
9. Frequently asked questions
What is the $100 rule for borrowing costs?
If total borrowing expenses (excluding interest) are more than $100, they must be deducted over the shorter of the loan term or five years. If the total is $100 or less, they can be deducted immediately. This applies only when the borrowed funds are used for income-producing purposes. Interest is deductible separately in the year incurred under section 8-1 of the Income Tax Assessment Act 1997 (Cth).How long do I need to keep records of legal expenses?
You must keep records for five years from the date you lodge your tax return. If total deductions exceed $300, written evidence such as receipts or invoices is required. Even if under $300, it is best practice to retain documentation. Records can be digital or paper-based and must be in English or easily translated into English.Are fines and penalties tax deductible?
No. Fines and penalties are specifically non-deductible under Australian tax law, even if they arise in the course of business. However, legal costs incurred in defending against a fine may be deductible if they directly relate to your income-producing activities or business operations.
10. Resources and further information
Australian Taxation Office (ATO) official resources
General deduction guidance:
Specific legal expense guidance:
- Deductibility of Legal Personal Representative Legal Costs
- ATO Taxation Ruling TR 2011/6 (Section 40-880)
- ATO Legal Database
Australian legislation
Primary legislation:
- Income Tax Assessment Act 1997 (Cth) – Section 40-880 (Business Related Costs)
- Income Tax Assessment Act 1997 via AustLII
Contact the ATO
Phone: 13 28 61 (Individuals and sole traders)
Website: www.ato.gov.au
Online Services: Access myGov to lodge returns and view records
Find a registered tax agent
To find a registered tax agent or accountant in your area, visit the Tax Practitioners Board register at: www.tpb.gov.au
Disclaimer: This article provides general information only and should not be relied upon as legal or tax advice. Tax laws change regularly, and individual circumstances vary. Always consult with a qualified tax professional or registered tax agent regarding your specific situation.
Published: April 2009 | Last Reviewed: October 2025 | Next Review: April 2026





