Field guides

Invoice and document guides

Practical explanations for the documents you send, receive and keep.

Construction invoice guide

How construction invoicing works: deposits, progress claims, variations, retention and payment applications — step by step, with a free template and generator.

Past Due Invoice

What to check after an invoice passes its stated due date, with adaptable day 1, 15 and 30 reminder examples and clear reply-handling rules.

Invoice vs quote

Invoice vs quote: learn the difference between a price offered before work and a request for payment afterward, with document fields and worked examples.

What Is a Purchase Order?

Learn what a purchase order records, who issues it and how it connects to delivery and invoicing, with a worked example and the fields a buyer completes.

Purchase Order vs Invoice

Compare a purchase order vs invoice by sender, timing, fields and purpose, then see how PO, delivery record and invoice are matched.

How to write a quote for a job

Learn how to write a quote for a job: scope, prices, exclusions, validity, acceptance and country notes, with an annotated sample and a worked service example.

What is a credit invoice?

Understand invoice credits, credit notes and credit memos, when to issue one, how a credit differs from a refund, and how to keep the correction trail.

How to make an invoice

Learn how to make an invoice in 10 practical steps, see a filled example, and use a free invoice maker to download your own PDF.

How to Send an Invoice

Check, send, record, and follow up on an invoice with practical channel and message guidance.

Invoice Due Dates

Understand issue dates, due dates, Net terms, milestones, and contract-dependent grace periods.

Invoice Payment Methods

Compare card, ACH or bank transfer, check, cash, and supported payment links without assuming one method fits every business.

Invoice Payment Terms

Write clear invoice terms that match the agreement, including Net examples, deposits, milestones, and conditional late-fee wording.

Invoice Numbers

Choose a practical invoice numbering sequence, keep identifiers unique, and handle corrections without losing the audit trail.

Invoice Descriptions

Write invoice descriptions that identify the work or item, period, quantity, and agreed rate without making legal or payment promises.

Quote vs estimate

A quote fixes the price for defined work; an estimate is a best guess that can change.

Choose a guide for the document you need

Use these invoice and document guides to match the record to the stage of the job. If you are describing a price before work begins, read How to write a quote for a job. It covers the scope, price, exclusions, validity and acceptance details that belong in the offer. Use Invoice vs quote when you need to distinguish the offer from the later request for payment. The quote-versus-estimate guide explains the difference between an agreed price and an approximation, with examples that show how the wording changes the price promise.

If work is ready to bill, start with How to make an invoice. It follows the document from business and customer details through the invoice number, dates, line items, total and payment instructions. Invoice anatomy is useful when you already have a draft and want to identify the job of each field. For a construction project, the construction invoice guide follows deposits, progress claims, variations and the final claim. Those stages help you choose the right document for the billing moment instead of treating every job as a single finished-work invoice.

When you are matching documents after an order or payment, choose the guide that explains that record. A purchase order records what the buyer ordered; the purchase-order-versus-invoice guide explains how the order and the request for payment fit together. A delivery note records goods handed over. An itemized receipt records paid items, while a billing statement summarizes activity on an account. For a correction to an earlier bill, read What is a credit invoice before choosing the credit-note document. Follow the linked template page when you need a downloadable file; use the guide when you need to understand what the document records and when to use it.