Guides
Invoicing guides, checked against the rules.
Plain answers on writing invoices, tax invoices, GST, VAT, sales tax, payment terms and getting paid. Every rule is checked against the official source linked in the guide.
- How to add GST to an invoiceAdd GST or work it out from a GST inclusive price, with exact cents for Australia, New Zealand, Singapore, India and Canada.
- Invoice email templates for every situationFive invoice emails for new clients, regulars, retainers, deposits and final bills, with subject line formulas and file names.
- How to follow up an unpaid invoiceA reminder schedule from before the due date to final notice, with four copy ready emails and lawful next steps.
- How to set an invoice due dateHow to choose and state a due date, how it follows from payment terms, and exact worked dates for common terms.
- What to include on an invoiceEvery invoice field, why it matters and which of 10 countries require it on a tax invoice, in one checklist table.
- How to invoice as a contractorProgress claims, retention, variations and deposits explained, with a staged $48,000 job worked through line by line.
- How to invoice as a freelancerFreelance invoicing from first client to paid: billing models, a milestone invoice worked to the cent, tax thresholds and clients abroad.
- Late payment fees and interest on invoices, by countryUK statutory interest and compensation, Ireland's EU based rules, and Australia's contract approach, with worked late payment sums.
- Payment terms explained, from due on receipt to 2/10 net 30Net 7 to net 60, EOM, due on receipt and 2/10 net 30, each turned into a real due date from one invoice, with a discount example.
- Invoice numbering: formats that stay unique and in orderInvoice number formats that never repeat, a sample year of numbers, and what tax offices in eight countries say about numbering.