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What is invoicing? Everything you need to know

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Invoicing is the process of creating and sending an invoice to a customer for products or services provided. It’s a vital part of your financial administration and directly affects your cash flow.

In this guide, we’ll explain how invoicing works, what to keep in mind, and how smart software like Payt can make your invoicing simpler and more efficient.

Contents

  1. What does the invoicing process look like?
  2. What is e-invoicing?
  3. Top 5 most common invoicing mistakes
  4. How Payt simplifies invoicing
  5. Frequently asked questions about invoicing

What does the invoicing process look like?

A clear and consistent invoicing process helps you stay organised, get paid quicker, and avoid costly errors. Here are the typical steps involved:

  • Collect the right details: This includes customer information, what has been delivered, applicable tax rates, and payment terms.
  • Create the invoice: Ensure it includes a unique invoice number, issue date, payment details, and a clear description of what’s been delivered.
  • Send the invoice: Most businesses use email or e-invoicing platforms. Posting paper invoices is still possible, but slower.
  • Track payment: Monitor when payments are received. Make it easy with payment links or direct debit options.
  • Follow up if unpaid: If payment is late, follow up with reminders or a formal dunning letter.
  • Record in your accounts: Log the payment and close the invoice in your accounting system.

Tip: Choose a set day each week or month to manage your invoicing. This ensures consistency and reduces the risk of missed invoices—many businesses link this with their tax filing schedule.

What is e-invoicing?

E-invoicing, also known as electronic invoicing, involves sending invoices in a structured digital format, such as UBL. Accounting software programs can process this automatically. It’s not the same as simply emailing a PDF.

The table below clearly outlines the differences between traditional invoicing and e-invoicing.

FeatureTraditional invoicingE-invoicing
Invoice formatPDF or paper invoiceUBL / structured XML file
ExplanationManually created and sentAutomatically generated and processed
BenefitsSimple to create

  • Reduced risk of errors

  • Faster payments

  • Less manual effort

  • Improved clarity and control

Drawbacks

  • Not automatically processable

  • Higher chance of errors

Requires compatible software

Note: Peppol e-invoicing is becoming mandatory in many countries, especially for invoicing public sector organisations. Want to stay ahead? Visit our Peppol compliance page to prepare your invoicing for the future.

Top 5 most common invoicing mistakes

Invoicing errors can lead to delayed payments and even legal issues. Here are the most common mistakes—and how to avoid them:

  • Missing invoice numbers: Makes it difficult to track or audit invoices.
  • Incomplete details: Missing customer data or unclear item descriptions cause confusion.
  • Incorrect tax rates: Can lead to financial penalties or reporting errors.
  • Late invoicing: Delays in sending invoices lead to delays in receiving payments.
  • No follow-up on overdue payments: Without reminders, invoices may go unpaid.

Solution: Use credit management software like Payt. It automates these steps and reduces human error—so your cash flow stays healthy.

How Payt simplifies invoicing

Payt takes care of your full invoicing cycle—from sending invoices to chasing overdue payments. With our software, you get paid quicker and spend less time on admin.

  • Benefits of using Payt for invoicing:
  • Invoices are sent automatically, including attachments and payment options.
  • Automatic follow-ups via reminders and dunning letters.
  • Easy integration with your accounting software.
  • Real-time overview of your outstanding payments.

Book a demo with our expert to find out how Payt can benefit your business.

Frequently asked questions about invoicing

Although the terms are often used interchangeably, there’s a subtle difference. Invoicing refers specifically to creating and sending an invoice for goods or services rendered. Billing is broader and includes the entire process—from generating the invoice, sending it, managing collections, and recording payment. In day-to-day business, both terms are typically used to describe the same process.

Invoicing is part of accounts receivable. When your business issues an invoice to a customer, you’re expecting to receive payment. It becomes part of the income owed to your business. Accounts payable refers to invoices you’ve received from suppliers, which your business needs to pay.

Yes, invoicing is a fundamental part of accounting. It documents income, tracks payments, and ensures that transactions are accurately recorded in the financial system. Proper invoicing not only supports your cash flow but also plays a key role in VAT reporting, audits, and financial planning.

In most cases, yes—especially for VAT compliance. Many tax authorities require that an invoice be issued within a specific period after the goods or services are delivered. For example, in the UK, VAT invoices should generally be issued within 30 days. Delayed invoicing can affect your cash flow and compliance, so it’s important to check local regulations and stick to a regular invoicing schedule.

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By Xindu Hendriks

Xindu is an expert in digital strategy and accounts receivable management at Payt. She is known for her analytical approach.

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