Next time if you pay your income tax via the new income tax portal website, then be aware that you will be liable to pay for convenience charges and Goods and Services Tax (GST) for using certain payment methods. For example, you can get charged Rs 300 for paying income tax of Rs 30,000 using some of the payment modes.The convenience charges and GST will be applicable if income tax is paid using the ‘payment gateway’ on the e-filing income tax website. If you pay using ‘Payment Gateway’ -which is one of the five payment options as shown below then transaction charges will be applicable for certain modes of payment.