Invoice & billing terms explained
Practical guides for freelancers and small businesses — what each term means, what to put on the PDF, and how to apply it in the free invoice editor. Not filler content: every page ends with clear next steps.
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Amount Due vs Outstanding Invoice — Terminology Explained
Amount due is the specific sum owed on a single invoice, while an outstanding invoice is any invoice that has been sent but not yet fully paid.
What Is a Commercial Invoice?
A commercial invoice is an official document issued by a seller to a buyer that records a completed transaction and serves as the basis for customs clearance and payment.
How to Communicate Payment Expectations Professionally
Communicating payment expectations means clearly stating when, how, and how much a client should pay — before, during, and after a project.
GST vs VAT vs Sales Tax — What's the Difference?
GST, VAT, and sales tax are all consumption taxes on goods and services, but they differ in structure, collection method, and which countries use them.
How to Charge Late Fees on Invoices
A late fee is a charge added to an overdue invoice as a penalty for not paying by the agreed due date.
How to Follow Up on an Unpaid Invoice
Following up on an unpaid invoice means contacting a client after the payment due date to remind them and request the outstanding payment.
How to Send an Invoice by Email (With Templates)
Sending an invoice by email means attaching a PDF invoice to a professional email message that clearly identifies the invoice and requests payment.
Invoice Abbreviations Glossary — Common Codes Explained
Invoice abbreviations are short codes used on invoices to save space and follow industry conventions — like PO for Purchase Order or Qty for Quantity.
Common Invoice Line-Item Terms & Synonyms Explained
Line items are the individual rows on an invoice that describe each product or service, its quantity, unit price, and line total.
Invoice Payment Terms Explained
Payment terms are the conditions under which a seller expects to be paid, including the deadline, accepted methods, and any discounts or penalties.
Invoice vs Purchase Order — What's the Difference?
A purchase order (PO) is a buyer's request to purchase goods or services. An invoice is the seller's request for payment after fulfilling that order.
Invoice vs Quote: What's the Difference?
A quote (or estimate) is a proposed price for work not yet started. An invoice is a formal request for payment after work is completed or goods are delivered.
Invoice vs Receipt: What's the Difference?
An invoice is a request for payment sent before a transaction is complete. A receipt is proof of payment issued after the transaction is settled.
Invoice vs Statement — What's the Difference?
An invoice is a request for payment for a specific transaction. A statement is a summary of all transactions and balances on a client's account over a period.
Professional Invoice Elements — What Every Invoice Needs
A professional invoice includes your business details, client information, invoice number, date, itemized charges, totals, and payment terms.
What Is a Proforma Invoice?
A proforma invoice is a preliminary bill sent before goods are delivered or services are completed. It outlines expected costs but is not a demand for payment.
What Does GST Mean on an Invoice? (Meaning & Examples)
GST (Goods and Services Tax) is a consumption tax shown on an invoice as a separate amount added to taxable goods or services, collected by the seller for the government.
What Does Net 30 Mean on an Invoice?
Net 30 means the full invoice amount is due within 30 calendar days of the invoice date.
What Is an Invoice Number?
An invoice number is a unique identifier assigned to each invoice, used for tracking, reference, and record-keeping.
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