🧮 Python Tax Calculator

A simple Python-based tax calculator that computes tax, gross pay, and net pay based on Nigerian tax rules.

💡 Tax Rules

• First ₦200,000 of salary is tax-free
• Next ₦500,000 is taxed at 10%
• Next ₦300,000 is taxed at 15%
• Any amount above ₦1,000,000 is taxed at 20%
• Bonuses are not taxed, but are included in gross pay

📦 Features

- Accurate tax breakdown
- Handles edge cases (e.g., negative values)
- Includes unit tests with `pytest`

✅ Requirements

Python 3.12+
Install dependencies

pip install -r requirements.txt

🚀 Usage

from tax_calculator import TaxRequest, calculate_tax
from decimal import Decimal

req = TaxRequest(salary=Decimal("900000"), bonus=Decimal("100000"))
res = calculate_tax(req)

print("Tax:", res.tax_amount)
print("Gross Pay:", res.gross_pay)
print("Net Pay:", res.net_pay)

🧪 Run Tests

pytest

🗂️ Project Structure

.
├── main.py          # Main tax logic
├── test/
│   └── test_tax_calculator.py # Pytest unit tests
├── requirements.txt
└── README.md

👤 Author

Favour Oluwademilade Bamgboye GitHub | LinkedIn