What is a letter of demand?
A letter of demand is a formal written notice from a creditor to a debtor requesting payment of an outstanding debt. It sets out exactly what is owed, the basis for the claim, and a deadline for payment. In Australia, sending a letter of demand is typically the first formal step in debt recovery — and often the most effective one.
Unlike a casual payment reminder, a letter of demand signals that you are prepared to take legal action if the debt is not paid. This shift in tone significantly increases the likelihood of payment.
Why send a letter of demand?
- It creates a clear paper trail and establishes the debt in writing
- Courts require evidence of a prior demand before most debt recovery actions
- It often triggers payment without any further action — particularly with legitimate businesses that have simply delayed payment. The recovery rate at this first-letter step is materially higher than at later escalation stages (see our breakdown of debt recovery rates in Australia).
- It puts the debtor on notice that you know your rights and are prepared to enforce them
- Statutory interest may begin to accrue from the date of demand in some jurisdictions
What to include in a letter of demand
A well-drafted letter of demand should include the following elements:
1. Your details
Full legal name or business name, address, ABN, and contact details. This establishes your identity as the creditor and allows the debtor to verify you.
2. The debtor's details
Full legal name or business name and address. If you know their ABN, include it — it removes any ambiguity about who the demand is addressed to.
3. The amount owed
The exact amount claimed, broken down if relevant (principal, interest, fees). Including statutory interest signals that you know your rights.
4. The basis for the claim
A brief description of the debt — the invoice number, date, and nature of the goods or services provided. Attach a copy of the invoice or agreement as supporting evidence.
5. A clear payment deadline
Specify a reasonable date — typically 7–14 days from the date of the letter. Courts have found that a 7-day deadline is reasonable for most B2B debts.
6. Consequences of non-payment
State clearly that if the amount is not paid by the deadline, you will take further action. This may include court proceedings, referral to a debt collection agency, or reporting to a credit bureau. For an honest comparison of when a demand resolves a debt versus when filing in court becomes the right move, see letter of demand vs small claims court.
7. Payment instructions
Your bank account details (BSB and account number) or another payment method. Make it easy for the debtor to pay.
Common mistakes to avoid
- Threatening illegal action. You cannot threaten to do anything you are not legally entitled to do (e.g., report to police for a civil debt, blacklist, defame).
- Emotional language. Keep the tone firm but professional. Anger undermines your credibility.
- Inaccurate amounts. If the amount is disputed, a court will scrutinise any inconsistencies. Be precise.
- Missing evidence. Always attach the relevant invoice or agreement. A demand without supporting documents is easily challenged.
- Wrong entity. Send to the correct legal entity. "Bob's Plumbing" and "Robert Smith Pty Ltd" are different legal persons.
How to send a letter of demand
For maximum legal effect, send by:
- Registered post — creates a presumption of delivery
- Email with read receipt — fast and creates a digital record
- Both — for significant debts, belt-and-suspenders
Keep a copy of the sent letter, the delivery confirmation, and any responses from the debtor.
What happens after you send it?
Most debtors will respond within 7–14 days — though typical days-to-payment varies considerably by industry (construction and trades pay slowest; professional services fastest). See average time to get paid by industry for benchmarks against your sector. Possible outcomes:
- Full payment — the most common outcome for businesses with legitimate cash flow issues
- Partial payment or payment plan offer — you can accept or reject; get any agreement in writing
- Dispute — the debtor contests the claim; you may need to provide more evidence or negotiate
- No response — see what to do next →
How the 2026 report should change how you write your letter
Our 2026 Australian Debt Collection Report contains three findings that should directly inform what goes in your letter of demand.
1. Cite the debtor's PTRR disclosure if they are a large business
Large Australian businesses (turnover $100M+) are required to file twice-yearly disclosures of how long they take to pay small business suppliers on the Commonwealth Payment Times Reports Register. The data is public and admissible in court. The report's Late Payer Index names the 40 worst — topped by Hewlett-Packard Australia at 986 days 95th-percentile payment time. If your debtor appears on the Register, cite their own statutory disclosure in your letter. It signals that the regulator already knows about their behaviour and that the specific overdue invoice will be measured against their published record.
2. Send sooner rather than later — the recovery-rate ladder is steep
The report's Section 8 reproduces CreditorWatch's default-to-insolvency probability data: a debtor with 1 formal payment default has a 20–24% probability of failure within 12 months. With 2 defaults: 42%. With 3+: 62%. Each month of delay between when you could send a letter of demand and when you actually do approximately doubles the probability that your debtor will be insolvent by the time you act. There is no advantage in waiting; the only outcome of waiting is worse.
3. Note that the debtor's industry shapes your expected outcome
The report's Sydney Collect B2B Risk Index (Section 5) shows hospitality at 14.06 first-time external administrations per 1,000 businesses per year — 4.1× the national average and 2.8× the construction rate. If your debtor is in hospitality, accommodation, or food services, your timing window is materially shorter than for a debtor in healthcare, real estate, or professional services (all at less than half the national rate). Match your urgency to your debtor's industry.