How to Extract Invoice Data From PDF in Python

Updated September 12, 2023

In today's fast-paced business environment, efficient invoice data extraction is crucial for streamlining financial operations. One of the most common challenges faced by organizations is extracting valuable invoice data from PDF documents. In this article, we will explore how Python, a versatile and powerful programming language, can be harnessed to automate the extraction of essential information from invoices in PDF format, such as Invoice Date, Amount, and Invoice Number. By leveraging Python's robust libraries and tools, businesses can significantly reduce manual data extraction and entry, minimize errors, and enhance their overall productivity in managing invoices. Join us on this journey to discover how Python can revolutionize your invoice processing workflow.

In this article, we will discuss how you can extract text data from invoice PDF files using the IronPDF library for Python.

How to Extract Invoice Data from PDF in Python

  1. Install the Python library for extracting data from PDF invoices.
  2. Utilize the PdfDocument.FromFile method to open a PDF file.
  3. Extract all the data from the invoice using the ExtractAllText method.
  4. Use the print method to print all the extracted data from the invoice.
  5. Extract specific data from invoice data.

1. IronPDF

IronPDF for Python is a robust library using Python that serves as a bridge between Python applications and PDF documents. This versatile tool provides developers with the means to effortlessly create, manipulate, and interact with PDF files within their Python projects. Here are some of the standout features that make IronPDF a valuable asset:

  1. PDF Generation: IronPDF enables the dynamic generation of PDF files from scratch, allowing developers to programmatically create PDFs with custom content, styling, and layout.
  2. HTML to PDF Conversion: It can convert HTML content, including web pages, to high-quality PDFs, preserving the layout and styling of the original HTML, which is especially useful for generating reports and documentation.
  3. PDF Editing: Developers can easily edit existing PDFs by adding, modifying, or removing text, images, and interactive elements, making it a powerful tool for document manipulation.
  4. PDF Merging and Splitting: IronPDF allows you to merge multiple PDF documents into a single file or split a PDF into multiple files, providing flexibility in managing large sets of PDFs.
  5. PDF Forms: It supports the creation and filling of interactive PDF forms, making it ideal for applications that require user input and data collection.
  6. Digital Signatures: You can add digital signatures to PDF documents, ensuring the integrity and authenticity of your files, which is vital for legal and security purposes.
  7. PDF Data Extraction: IronPDF provides extraction capabilities to protect information within PDFs.

2. Setting Up the Environment

Setting up the environment for IronPDF in Python involves a few steps to ensure that you can start using the library effectively. Here's a step-by-step guide:

  1. Create a new Python project in PyCharm and create a virtual environment or use an existing Interpreter.
  2. Install IronPDF using the command-line terminal by running the following command in the terminal:
 pip install ironpdf

How to Extract Invoice Data From PDF in Python: Figure 1 - IronPDF being installed from the command line.

3. Extract Data from Invoice Using IronPDF

In this section of the article, we will see how to extract data from the invoice format and output format using the Python library IronPDF. The below code will extract all the data from the invoice and print it in the console.

Example Invoice

How to Extract Invoice Data From PDF in Python: Figure 2 - An example invoice, with standard invoice elements such as a company, title, invoice number, line items, and total.

from ironpdf import *
pdf = PdfDocument.FromFile("INV_2022_00001.pdf")
all_text = pdf.ExtractAllText()

The above code loads a specific PDF file named "INV_2022_00001.pdf" using the PdfDocument.FromFile method. Subsequently, it extracts data on all the text content from the loaded PDF document and stores it in the variable all_text. Finally, the extracted text is printed to the console using the print function. Essentially, this code automates the process of extracting text structured data and unstructured data from a PDF file, making it accessible for further processing or analysis in a Python environment.

3.1. Output

How to Extract Invoice Data From PDF in Python: Figure 3 - The text from the invoice output to the console.

4. Extract Specific Data from Invoice

Using IronPDF invoice data extraction is quite an easy process, as we see in the above example. Extracting data such as Invoice Number and amount from the PDF invoice data can be a tricky process, but using IronPDF and help with the Python Open-Source library 're,' it can be achieved. The below code will extract data from PDF invoices and print them in the console.

from ironpdf import *
import re
invoice_number_pattern = r"Invoice\s+(INV/\d{4}/\d{5})"
amount_pattern = r"Total\s+\$\s*([\d,.]+(?:\.\d{2})?)"
pdf = PdfDocument.FromFile("INV_2022_00001.pdf")
all_text = pdf.ExtractAllText()
invoice_number_match =, all_text)
amount_match =, all_text)
invoice_number = if invoice_number_match else "Not found"
amount = if amount_match else "Not found"
print('Invoice Number:' + invoice_number + '\n Amount:$' + amount)

This code snippet utilizes Python and the IronPDF library to perform data extraction from a PDF document. It starts by importing the necessary libraries and defining regular expression patterns for identifying an invoice number and a total amount within the PDF's text content. The code then loads the target PDF, extracts all of its text, and proceeds to search for matches of the defined patterns.

If successful matches are found, it stores the corresponding values for the invoice number and amount; otherwise, it assigns "Not found." Finally, the script and output file print the extracted invoice number and amount output to the console, providing a streamlined way to automate the extraction of specific data from PDF documents, a task commonly encountered in various data processing and accounting applications.

4.1. Output

How to Extract Invoice Data From PDF in Python: Figure 4 - Output text that says: Invoice Number: INV/2022/00001 and on the next line Amount: $126.50.

5. Conclusion

In today's fast-paced business landscape, Python stands as a formidable ally for organizations seeking to streamline their financial operations by automating the extraction of crucial data from PDF invoices. Leveraging Python's capabilities and the IronPDF library, businesses can significantly reduce manual data entry, mitigate errors, save time, and enhance overall productivity in the accounting process of managing invoices. IronPDF, with its versatile features, such as PDF generation, HTML to PDF conversion, PDF editing, merging, splitting, form handling, digital signatures, and accurate data extraction, emerges as a powerful tool for these tasks.

By following simple setup procedures, Python developers can swiftly integrate IronPDF into their projects, revolutionizing their invoice processing workflows and making data extraction from invoices a seamless and efficient process. The code example of data extraction using IronPDF can be found here. The complete tutorial on data extraction using IronPDF Python is available on the following link, and for Invoice Extraction using C#, visit here.

How to Parse A PDF File in Python
How to Convert Image to PDF in Python

Ready to get started? Version: 2024.7 just released

Free pip Install View Licenses >