An invoice should be easy to pay because it matches what the client expected. Gather the agreement, estimate, timesheet, delivery record, purchase order, tax information, and customer billing details before opening a template.
This process is suitable for many service and small business invoices, but required fields and tax treatment vary. Confirm the rules for your location and transaction.
Key points
What to know at a glance
| Topic | What to check |
|---|---|
| Identify the invoice and parties | Unique invoice number |
| Add products or services | Clear item or service description |
| Calculate and state payment terms | Subtotal and adjustments |
| Review, send, and record | Match the approved scope |
Identify the invoice and parties
Label the document “Invoice” and assign a unique number. Add the issue date, due date, and service or delivery period. Use the correct business name, address, contact details, and required registration or tax identifiers.
Enter the customer’s legal billing name, address, and accounts-payable contact. Add project, contract, purchase order, vendor, or account references required by the client. Incorrect master data can delay an otherwise accurate invoice.
- Unique invoice number
- Issue, service, and due dates
- Supplier and customer details
- Required project and order references
Add products or services
Create one line for each understandable item, service, milestone, or grouped charge. Include description, quantity or hours, rate or unit price, applicable tax, and line total. Use the language from the approved scope.
Add agreed expenses or changes separately. Avoid vague lines and internal abbreviations the client cannot interpret. For time-based work, include the period or task summary needed to verify the hours.
- Clear item or service description
- Quantity, hours, and rate
- Approved expenses and changes
- Accurate line totals
Calculate and state payment terms
Calculate subtotal, discounts, tax, shipping or allowed fees, deposits, credits, and amount due. Verify currency, decimal placement, and rounding. Ensure tax is calculated using current requirements for the transaction.
State accepted methods, payment instructions, and the actual due date. Repeat agreed late-payment or early-payment terms accurately. Do not add new conditions after delivery.
- Subtotal and adjustments
- Tax and final total
- Deposits and credits
- Payment method and deadline
Review, send, and record
Compare the invoice with the agreement and supporting documents. Proofread names, numbers, dates, items, tax, total, and payment details. Preview the final PDF on more than one screen size when the layout is new, and verify that every payment link opens the intended destination.
Send it to the billing contact, save the exact final version, and record delivery and due date. Pocket Invoice lets you create unlimited invoices, reuse client and inventory records, select a professional template, and export PDFs from iOS, Android, or Web.
- Match the approved scope
- Proofread every identifier and total
- Save the final PDF sent
- Track status and follow-up
Official sources
These references support the regulatory information in this guide. Check the current page before making a decision.
- European Commission VAT Invoicing RulesProvides official EU VAT invoice rules and the transaction details required on qualifying invoices.
- UK Government Invoice RequirementsProvides a practical official checklist for invoice identity, parties, description, dates, amounts, VAT, and total.
Frequently asked questions
Questions about how to create an invoice
Can I create an invoice without a company?
Rules vary. Sole proprietors and freelancers may invoice under their legal or registered trading identity, using required contact and tax details.
Can I create an invoice before work is finished?
Yes, for an agreed deposit, advance, recurring period, or milestone. The invoice should match the billing schedule accepted by the client.
What format should I send?
A stable PDF is widely readable, while some clients require portals or structured electronic formats. Follow the recipient’s process.