GST Payments and Refunds: Calculation, Due Dates & Penalties

Introduction

GST payments and refunds are one of the most critical aspects of GST compliance, as they directly impact business cash flow. Under the GST system, taxpayers are required to pay tax after adjusting eligible Input Tax Credit (ITC) and can also claim refunds in cases of excess payment or accumulated credit. Although the GST portal automates much of the process, errors in payment and refund claims are still commonly observed.

Key Highlights

GST payment is generally made at the time of filing GSTR-3B
The net GST liability is calculated after adjusting eligible Input Tax Credit (ITC)
Interest at 18% per annum is applicable on delayed GST payments
GST refunds must typically be claimed within two years from the relevant date
Refund applications are submitted online using Form GST RFD-01

Understanding these rules helps businesses ensure timely compliance, avoid penalties, and efficiently manage working capital under the GST regime.

GST Payment and Refund Explained: Meaning and Key Details

GST payment refers to the process of settling the tax liability by a registered taxpayer under the Goods and Services Tax (GST) regime. In the normal course of business, GST is collected from customers on sales (output tax), while GST is paid on purchases (input tax). The net difference between output tax and eligible Input Tax Credit (ITC) determines the final amount payable to the government.

In certain situations, this cycle may result in excess tax payment or accumulation of unutilized input tax credit. When this happens, taxpayers are eligible to claim a GST refund for the excess amount paid.

In practice, GST refunds are most commonly claimed by exporters and businesses affected by inverted duty structures, where the tax rate on inputs is higher than the tax rate on outward supplies.

What Are the Different GST Payments to Be Made? Complete Guide

Under the Goods and Services Tax (GST) system, tax payments are classified into three main types based on the nature of supply. Each type of GST is applicable depending on whether the transaction is intra-state or inter-state.

Types of GST Payments

Type of Tax	When It Applies	Paid To
IGST (Integrated GST)	Inter-state supply of goods or services	Central Government
CGST (Central GST)	Intra-state supply	Central Government
SGST (State GST)	Intra-state supply	State Government

GST Taxation Examples

Transaction Scenario	CGST	SGST	IGST
Goods sold from Delhi to Mumbai	No	No	Yes
Goods sold within Mumbai	Yes	Yes	No
Goods sold from Mumbai to Pune	Yes	Yes	No

Although the classification appears simple in theory, businesses often face challenges in correct tax identification, especially when goods are transferred across multiple warehouses or locations.

Tax Deducted at Source (TDS) under GST: Meaning and Example

Under GST law, certain government departments and notified entities are required to deduct Tax Deducted at Source (TDS) at the rate of 2% while making payments to suppliers for taxable goods or services.

Example of GST TDS

For instance, if a government department awards a construction contract worth ₹10 lakh, it will deduct ₹20,000 as GST TDS at the time of payment and deposit it with the government. The supplier will receive the remaining amount after deduction.

The TDS amount deducted is credited to the supplier’s electronic cash ledger on the GST portal, which can later be used for tax payments.

This mechanism ensures better tax compliance and transparency in high-value government transactions.

About the Author

Dakesh

Dakesh simplifies complex legal regulations into practical, easy-to-understand guidance, enabling entrepreneurs to remain compliant while growing sustainable and scalable businesses.

May 5, 2026