Create an invoice generator

Here’s a simple invoice generator in Python that you can run locally. It creates an invoice based on user input and outputs a nicely formatted text invoice. You can easily extend it or convert it to PDF later if needed.

python
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from datetime import datetime

class InvoiceGenerator:
    def __init__(self, company_name, company_address, client_name, client_address, invoice_number):
        self.company_name = company_name
        self.company_address = company_address
        self.client_name = client_name
        self.client_address = client_address
        self.invoice_number = invoice_number
        self.date = datetime.now().strftime("%Y-%m-%d")
        self.items = []

    def add_item(self, description, quantity, unit_price):
        total_price = quantity * unit_price
        self.items.append({
            "description": description,
            "quantity": quantity,
            "unit_price": unit_price,
            "total_price": total_price
        })

    def get_total(self):
        return sum(item['total_price'] for item in self.items)

    def generate_invoice(self):
        invoice_text = []
        invoice_text.append(f"{self.company_name}")
        invoice_text.append(f"{self.company_address}")
        invoice_text.append("")
        invoice_text.append(f"Invoice #: {self.invoice_number}")
        invoice_text.append(f"Date: {self.date}")
        invoice_text.append("")
        invoice_text.append(f"Billed To: {self.client_name}")
        invoice_text.append(f"{self.client_address}")
        invoice_text.append("")
        invoice_text.append(f"{'Description':30} {'Qty':>5} {'Unit Price':>12} {'Total':>12}")
        invoice_text.append("-" * 65)

        for item in self.items:
            invoice_text.append(
                f"{item['description'][:30]:30} "
                f"{item['quantity']:>5} "
                f"${item['unit_price']:>11.2f} "
                f"${item['total_price']:>11.2f}"
            )

        invoice_text.append("-" * 65)
        invoice_text.append(f"{'TOTAL':>49}  ${self.get_total():.2f}")

        return "n".join(invoice_text)

# Example usage:
if __name__ == "__main__":
    # Create an invoice instance
    invoice = InvoiceGenerator(
        company_name="ACME Corp.",
        company_address="123 Business Rd, Business City, BC 12345",
        client_name="John Doe",
        client_address="789 Client St, Client City, CC 67890",
        invoice_number="2025-001"
    )

    # Add items
    invoice.add_item("Website design", 1, 1500.00)
    invoice.add_item("Hosting (12 months)", 1, 240.00)
    invoice.add_item("Domain registration", 1, 12.99)

    # Generate and print invoice
    print(invoice.generate_invoice())

This will print a clean invoice with company info, client info, line items, quantities, prices, and a total.

If you want, I can help you extend this to save as PDF or Excel or a web-based generator. Just ask!