These are practical questions that show up around ABN, GST, phone invoicing, and small-job invoice records.
1. What should I put on my first invoice as an Australian sole trader with an ABN?
Show the supplier identity and ABN, issue date, customer, a clear description of the work, quantity or hours and rate where relevant, total, accurate GST treatment, and practical payment instructions. A unique invoice number, contact details and exact due date also make the record easier to trace. Only use the heading Tax Invoice when the real GST status and supply make that wording appropriate.
2. Should I use Invoice or Tax Invoice if I am not registered for GST?
Use Invoice and do not charge GST if you are not registered for GST. ATO guidance says a business registered for GST uses tax invoices for taxable sales, while a business not registered for GST should not use the words Tax Invoice. The editor follows the GST or no-GST treatment you choose; confirm that choice from your real registration and transaction.
3. Is the GST registration threshold based on my salary or my sole-trader turnover?
GST registration tests business GST turnover, not the salary from an unrelated PAYG job. The ATO says most businesses must register when current or projected GST turnover reaches $75,000, and a business that newly reaches the threshold generally has 21 days to register. Because turnover calculations and exclusions can be fact-specific, check the current ATO test or ask an adviser.
4. What payment terms should a sole trader put on an invoice?
Use terms agreed with the customer before or when the work is accepted, then show the exact due date and accepted payment methods. Seven, 14 or 30 days are commercial choices rather than a universal invoice rule. Do not add a surprise late fee or invented discount after the job; contract terms and consumer law still apply.
5. What should I do when an invoice becomes overdue?
Start with a calm reminder that identifies the invoice, amount and due date, and ask whether the customer needs another copy or has a genuine dispute. If payment still does not arrive, follow the agreed terms and the business.gov.au escalation path, which can include a letter of demand or debt collection. Avoid repeated contact that could become misleading, coercive or harassing.
6. Is it too late to send an invoice I forgot to issue weeks or months ago?
Send a genuine invoice promptly, use the real issue date, describe the actual work and service date, and explain the delay rather than backdating the document. Whether the amount remains legally enforceable depends on the agreement, evidence, limitation rules and the state or territory. The invoice records the claim; it does not by itself prove the debt.
7. Can I add travel, materials or an allowance that was not discussed with the client?
An invoice should reflect charges authorised by the real quote, contract or later agreement. List labour, travel and materials separately when that makes the calculation clearer, but do not use the invoice to create a new charge after the work. If a cost was not agreed, ask the customer and document any variation before billing it.
8. How should I invoice hourly, daily or project-based contractor work?
Describe the real service period and use the unit that matches the agreement: hours multiplied by the hourly rate, days multiplied by the day rate, or an agreed project milestone or fixed fee. Include enough detail for the customer to understand what was supplied without exposing unnecessary confidential information. ABN Invoice line items support quantity, unit price and description beside a live total.
9. Do invoice numbers need to be sequential, and can I reuse one?
A unique invoice number is recommended because it lets both parties distinguish the document, payment and later correction. A simple sequence is usually easiest to audit, but the number does not need to reveal customer data. Do not reuse the same identifier for unrelated transactions; retain the original record if you issue a corrected replacement.
10. Do I need a business bank account before sending an invoice?
A separate business account is good operational practice because it separates receipts and expenses and makes accountant handoff easier, but an account type does not decide whether the invoice fields are valid. Use payment details you control, verify them carefully before sending, and treat any later request to change bank details as a fraud-sensitive event.
11. Is a free invoice maker enough, or do I need Xero or MYOB?
A focused maker can be enough when the job is creating customer documents, exporting them and keeping basic history. Full accounting software becomes relevant when you also need bank reconciliation, bookkeeping, payroll, BAS workflows, financial reports or deep integrations. ABN Invoice is intentionally the lightweight document layer, not a replacement for those accounting functions.
12. Is an online invoice maker safer than a Word or Excel template?
No tool can make inaccurate user facts correct. A structured online maker can reduce repeated layout, formula and field-maintenance work by keeping inputs, calculations and customer preview together. Word or Excel can still produce a sound invoice when every required field, formula, GST treatment and exported layout is maintained correctly.
13. Can I keep invoices for my accountant without using accounting software every day?
Yes, for the document-record part of the workflow. Keep the issued invoice, status and supporting evidence, then export the records your accountant or bookkeeper requests. Australian Government guidance says most business records must be kept for at least five years; document storage does not replace reconciliation, BAS preparation or accounting judgement.
14. How can I avoid retyping the same customer every week?
Use saved customer details and searchable invoice history, then duplicate only after checking the new service date, description, amount, GST treatment and invoice number. Free sign-in in ABN Invoice provides the record layer; VIP is relevant only when bulk archive packs or CSV handoff save enough repeated administration to justify it.
15. Can I create and send the invoice from my phone as soon as the job is finished?
Yes. Enter the real seller, customer, work, amount, GST treatment and payment details in the browser, check the live customer preview, then export a PDF or phone-friendly image. Sending promptly can reduce forgotten details, but still pause to verify the customer, amount, due date and bank information.
16. Can I invoice without an ABN, or put my TFN on the invoice instead?
Do not use a TFN as a public substitute for an ABN. When a supplier does not quote an ABN, the payer may need to withhold 47% unless an exception applies; eligible suppliers may use a Statement by a supplier. The correct path depends on whether the activity is a business, hobby, private activity or another exception, so use ATO and OAIC guidance rather than inventing an identifier.
17. How do I invoice an overseas client, and what about GST or currency fees?
Invoice in the currency and on the payment terms actually agreed, identify any transfer-fee responsibility, and keep evidence of the amount invoiced and received. Some exported services can be GST-free, but overseas billing does not automatically make every supply GST-free and GST-free sales may still matter to registration turnover. Check the ATO export rules and obtain advice for the real use and recipient of the service.
18. What if the customer sends me a recipient-created tax invoice?
An RCTI is issued by the recipient under a valid arrangement; it is not simply a customer rewriting your ordinary invoice. ATO requirements include clearly identifying it as recipient-created and meeting the applicable GST, ABN, agreement and timing conditions. Do not issue a duplicate supplier tax invoice for the same supply when a valid RCTI arrangement says the recipient issues it.
19. What should I do if an invoice has the wrong customer, amount or GST treatment?
Correct the source facts and issue a clearly traceable complete replacement rather than silently changing the historical file already sent. Keep the original and correction trail, tell the customer which document now applies, and seek tax advice if GST was reported or paid incorrectly. The live preview helps catch errors before export but cannot verify the underlying facts.
20. Does having an ABN and sending invoices prove that I am an independent contractor?
No. Fair Work says contractor or employee status depends on the real relationship and how it operates, not merely an ABN, contract label or invoice. Being told to obtain an ABN and invoice can still occur in sham contracting. If the arrangement is uncertain, review the current Fair Work tests or seek legal advice before treating the document as proof of status.