Simple Bank is a desktop banking simulator. Create an account, get a randomly generated 15-character account number, log in securely with a PIN, and manage your money through a simple, friendly interface: deposit, withdraw, and watch your balance update in real time.
It uses only Python's standard library, so there is nothing to install.
- 📝 Account creation with name, age, address, and a custom PIN
- 🔞 Age verification: only users 18 or older can open an account, and under-age users are told how many years they must wait
- 🔢 Random account numbers: unique 15-character alphanumeric IDs (A-Z, 0-9)
- 🔐 PIN-protected login with a 3-attempt limit; the account locks after too many wrong tries
- 💰 Deposit and withdraw with a live-updating balance in ₹
- 🛡️ Input validation: handles empty fields, non-numeric input, negative amounts, and insufficient balance
- ⌨️ Press Enter to log in for a smoother experience
| Create Account | Account Created |
|---|---|
 |
 |
| PIN Login | Dashboard |
|---|---|
 |
 |
| Deposit | Withdraw |
|---|---|
 |
 |
- Python 3.8 or higher
- Tkinter, which comes bundled with Python on Windows and macOS.
On some Linux distributions you may need to install it:
sudo apt install python3-tk
# 1. Clone the repository
git clone https://github.com/<your-username>/<your-repo-name>.git
# 2. Move into the project folder
cd <your-repo-name>
# 3. Run the app
python main.py💡 Replace
main.pywith the actual name of your Python file.
- Create Account: enter your name, age (18+), address, and a 4 to 6 digit PIN.
- Review Details: check your account summary and note your account number.
- Login: enter your PIN. You get 3 attempts before the account locks.
- Dashboard: type an amount, then click Deposit or Withdraw.
- Exit: click Exit when you are done.
.
├── main.py # Application code
├── README.md
└── screenshots/ # Images used in this README
├── 01-create-account.png
├── 02-account-created.png
├── 03-pin-login.png
├── 04-dashboard.png
├── 05-deposit.png
└── 06-withdraw.png
The app is a single BankApp class that extends tk.Tk and switches between four screens by clearing and redrawing one container frame:
| Screen | Method | Purpose |
|---|---|---|
| Create Account | show_create_account() |
Collects and validates user details |
| Account Summary | show_account_summary() |
Displays the new account info |
| PIN Login | show_login() |
Verifies the PIN with limited attempts |
| Dashboard | show_dashboard() |
Deposit, withdraw, and balance display |
This is a learning project. Data is stored in memory only and is lost when the app closes. The PIN is held as plain text, so it is not intended for real financial use.
- Save accounts to a file or database (JSON / SQLite)
- Support multiple accounts and a registration/login system
- Add a transaction history view
- Hash PINs instead of storing them as plain text
- Add a "Change PIN" option
- Dark mode theme
Suggestions and pull requests are welcome. Fork the repo, create a branch, and open a PR.
This project is licensed under the MIT License.
Made with ❤️ and Python
⭐ If you found this helpful, consider giving the repo a star!