Unpaid Family Loan Tax: Deductions in Australia

By The Chipkie Team, Personal Finance Editorial Team  ·  Last updated 5 October 2026

An unpaid family loan tax question often arrives after the practical problem: a relative cannot repay, and the lender wonders whether the loss belongs in their tax return. In Australia, losing principal does not automatically create an income deduction or an allowable capital loss.

Preserve facts before changing legal rights. A debt that remains owed, an accounting entry marked bad and a signed release are different things. These hypothetical Australian-dollar examples concern private individuals; company and money-lending business arrangements need tailored advice.

Key Takeaways

• An ordinary private loan of personal savings usually does not satisfy the bad-debt deduction criteria for lost principal.
• A personal-use debt can be a CGT asset while its capital loss is disregarded.
• Charging interest does not, by itself, turn a private lender into a money-lending business.
• Nonpayment or an internal write-off does not automatically end the lender’s legal rights.
• Voluntary forgiveness needs separate advice and is not a shortcut to tax relief.

Can you deduct an unpaid private family loan?

An ordinary individual lending personal savings generally cannot deduct lost principal merely because repayment fails. The bad-debt rules require specified connections with assessable income or a money-lending business. Lending capital to a relative is different from including it as income, and a written agreement alone does not establish eligibility for a deduction.

Section 25-35 in the Income Tax Assessment Act 1997 addresses debts written off as bad that were included in assessable income or involve money lent in the ordinary course of a money-lending business. A one-off family lender should not assume either condition exists.

Hypothetical AUD record: a parent lent $6,000 of savings for a child’s living expenses, interest-free. The child repaid $1,000; $5,000 remains unpaid. Assume the parent is not in a lending business and never included principal as income. The $5,000 calculation is correct, but it does not establish an income deduction.

• Original advance: $6,000, supported by a transfer record.
• Principal repaid: $1,000, supported by actual receipts.
• Outstanding principal: $6,000 minus $1,000 equals $5,000.
• Tax assessment: record the facts and obtain advice; do not enter $5,000 as a deduction simply because it is unpaid.

Could an unpaid loan create a capital loss instead?

A debt can be an asset for CGT purposes, but that does not make every loss allowable. Australian rules disregard capital losses from personal-use assets, including certain debts outside income production or business. Establish why the debt arose and whether a relevant CGT event occurred before treating an unpaid balance as a claim.

The ATO guide to CGT asset categories explains that personal-use debts include debts arising outside earning assessable income or carrying on business, and that personal-use capital losses are disregarded. The borrower’s plan to buy an asset does not by itself establish the lender’s income-producing purpose.

In the living-expenses example, a permanent $5,000 financial shortfall does not become an allowable capital loss merely because the parties sign a release. If a loan was genuinely made to earn assessable interest, the analysis can differ, but the outcome still requires evidence and assessment of the relevant rules.

• Original purpose: Preserve what the lender intended and what terms were actually agreed when lending occurred.
• Actual conduct: Keep interest calculations, receipts and genuine collection records, if they exist.
• Later changes: Do not insert historical interest or rewrite the reason for an advance after repayment fails.
• Separate positions: The borrower’s investment use and the lender’s purpose are different factual questions.
• No assumed claim: An adviser must determine eligibility, cost base, proceeds and any loss restriction.

When does an unpaid debt actually end?

Nonpayment does not necessarily end the lender’s right to collect. A relevant CGT event can depend on the right being legally released, discharged, satisfied or otherwise ending. An internal note marking the balance unrecoverable is different from extinguishing it. Check timing before signing a release or assuming a bankruptcy notice fixes the tax year.

Section 104-25 in the CGT event C2 provisions concerns the ending of intangible rights. The ATO’s published decision on a bankrupt debtor distinguishes bankruptcy and an expected nil dividend from the later discharge of provable debts. It is an older decision, so obtain advice on current law and the actual debt.

What evidence should you prepare for an adviser?

Prepare a factual file covering the original agreement, money advanced, repayments, interest treatment and recovery position. Include any proposed release or insolvency documents without assuming their effect. A concise chronology lets an adviser assess eligibility and timing from evidence, rather than infer the original arrangement from today’s unpaid balance.

The ATO’s TR 92/18 bad-debt ruling distinguishes genuinely bad debts from doubtful ones and addresses writing off eligible debts in the relevant year. It also explains why previously unassessed receipts and a debt already extinguished raise different issues. Those conditions matter only after establishing the deduction pathway applies.

1. Describe the advance. Amount, date, source of funds and what repayment was originally expected.
2. Attach genuine terms. Preserve the original interest, due dates and any approved changes.
3. Reconcile transactions. Show receipts, principal, interest and current balance separately.
4. State the difficulty. Record facts known about repayment capacity, distinguishing evidence from assumptions.
5. List communications. Include reasonable requests and responses, without exaggerating collection activity.
6. Show legal events. Attach insolvency notices, judgments, releases or other relevant documents.
7. Bring tax history. Identify any interest previously reported and the income-year method used.

Our guide to asking for money back can help frame a factual conversation. A clear family repayment record helps reconcile the amount before advice.

Does charging interest guarantee a deduction for principal?

No. Charging interest does not by itself establish that the lender runs a money-lending business or that the principal was previously assessable income. It may be relevant to a separate capital-asset analysis, but the actual purpose, terms and legal events still matter. Obtain advice rather than treating one interest clause as a guarantee.

Can I forgive the debt and then claim it as bad?

Do not assume you can release the debt and then claim it as a deductible bad debt. Forgiveness changes the right to repayment and may affect available tax pathways. An ineligible personal-use loss does not become allowable through a release. Assess the situation before signing rather than trying to reconstruct eligibility afterwards.

What if the borrower later pays something back?

Record the recovery when it actually occurs and tell your adviser about any earlier tax treatment. Identify whether it is principal, interest or another amount, and whether the obligation was ever released. A later receipt can require review of the earlier position, so retain the original assessment and supporting documents.

What is the most useful next step now?

Reconcile the unpaid amount and gather the original evidence before changing the debt’s legal status. Ask a tax adviser which deduction or CGT rules apply, if any, and a solicitor about collection or release. Clear records help those assessments even when the correct answer is that no tax relief is available.

Keep your family loan agreement and repayment history together with Chipkie so the facts remain available.

Disclaimer: The information provided in this article is for general informational purposes only and does not constitute financial, legal, or tax advice. Australian laws and lending criteria vary by state and territory and may change. Always consult a licensed financial adviser, solicitor, or conveyancer before entering into any financial arrangement or property purchase with another party.