01
Start from the billable source
Use the accepted contract, completed milestone, approved time or other authorised billing detail. Do not begin by guessing line items from memory or copying an old invoice without checking what changed.
Put this into practice with Understand the full billing operation.
02
What to include on an invoice
What should be included in an invoice is broadly the same everywhere: who is billing, who is paying, what was supplied, how the total was reached and when payment is due.
Tax rules then add their own invoice requirements. Depending on where the issuing entity is registered, those can include a tax registration number, a place of supply, item or service classification codes, a controlled numbering sequence or a time limit for issuing. Check the current rule before relying on a generic layout.
- Your business name, address and tax registration number where one applies
- The customer's name, address and any purchase order reference
- A unique invoice number, the issue date and the due date
- A line for each item: description, quantity, rate and amount
- Subtotal, each tax shown separately and the total due in a named currency
- Payment terms and how to pay
For the definition behind these fields, read what is an invoice.
03
Write line items a customer can recognise
Describe what was supplied in the language of the agreement. Show the unit, quantity and rate when they matter. Grouping can improve readability, but it should not hide how the total was reached.
Put this into practice with Download an invoice structure.
04
How to fill out an invoice, field by field
Whether you write an invoice in a document, fill out a template or use an online form, work in the same order: your details, the customer, the invoice number and dates, then the lines, totals and payment terms. Replace every example value and delete unused rows, so no stray figure reaches the total.
To make an invoice for a single job, a browser form is quicker than formatting a document. Save the finished invoice as a PDF so the customer receives a fixed version. When the same customers, rates and schedules repeat, Invoicera keeps them in the billing record so each invoice is not rebuilt by hand.
Try the free invoice maker to fill out an invoice in your browser and download it as a PDF, without an account.
05
Check terms, tax and entity details
Confirm the issuing entity, currency, tax treatment, invoice and due dates and payment instructions. Local rules can require additional identifiers, classifications and numbering controls.
Put this into practice with Automate repeatable outgoing invoices.
06
Review before delivery
Check the customer, totals and supporting terms. If an outgoing approval is required, retain the approver and timestamp with the invoice rather than relying on an email that cannot be seen from the record.
For the subject line, message and delivery record, read how to send an invoice.
07
Keep the next action visible
After delivery, distinguish sent, viewed, disputed, open, paid and unmatched states as appropriate. A clear receivable status prevents the invoice from disappearing into a folder once it leaves finance.
Step by step
Use the sequence, then check the exceptions.
- 01
Confirm the billable source and issuing entity.
- 02
Enter seller, buyer, invoice number and dates.
- 03
Add precise line descriptions, quantities and rates.
- 04
Calculate subtotal, tax and total, then state payment terms.
- 05
Review and approve the outgoing invoice where required.
- 06
Send the invoice and retain delivery, follow-up and payment status.







