GST Payment and Collection Mechanisms Explained

The Goods and Services Tax (GST) framework operates on the foundational principle of self-assessment, meaning registered persons are primarily responsible for calculating and discharging their tax liabilities and reporting them through periodic returns. Within this larger tax mechanism, the processes of payment and collection are heavily digitised and structured around specific statutory ledgers, hierarchical utilisation rules, and specialised deduction models.

Here is a comprehensive breakdown of the payment and collection mechanisms under GST:

1. The digital ledger system

The entire payment mechanism revolves around three electronic ledgers maintained on the GST Common Portal for every registered taxpayer:

• Electronic Liability Register (FORM GST PMT-01): This register records all liabilities of a taxable person, including self-assessed tax from returns, interest, penalties, late fees, and demands determined by tax officers.
• Electronic Credit Ledger (FORM GST PMT-02): This ledger reflects the self-assessed Input Tax Credit (ITC) claimed in the taxpayer's returns. The balance in this ledger can strictly be used only for making payments towards "output tax"; it cannot be used to pay interest, penalties, late fees, or tax payable under the Reverse Charge Mechanism.
• Electronic Cash Ledger (FORM GST PMT-05): Acting like an e-wallet, this ledger holds actual funds deposited by the taxpayer, as well as amounts credited from Tax Deducted at Source (TDS) and Tax Collected at Source (TCS).

2. Modes of payment and challan generation

To deposit funds into the Electronic Cash Ledger, a taxpayer must generate a challan (FORM GST PMT-06), which remains valid for 15 days.

• Permitted modes: Deposits can be made via Internet Banking, Unified Payment Interface (UPI), Immediate Payment Services (IMPS), NEFT, or RTGS.
• Over-the-counter (OTC): Cash, cheque, or Demand Draft payments are permitted but are strictly capped at ₹10,000 per challan per tax period, except for specific government departments and recovery officers.
• Effective date of payment: The date the amount is credited to the government's authorised bank account is deemed the official date of deposit, rather than the date it leaves the taxpayer's bank account.

3. Order of discharge and credit utilisation

The law establishes a strict chronological order for discharging tax liabilities to ensure past defaults are cleared first. Under Section 49(8), taxpayers must discharge their dues in the following sequence:

1. Self-assessed tax and other dues for previous tax periods.
2. Self-assessed tax and other dues for the current tax period.
3. Any other amounts payable, including demand notices or adjudicated proceedings.

When utilising ITC, a specific hierarchy applies: The Integrated Tax (IGST) credit must be fully exhausted first before utilising Central Tax (CGST) or State Tax (SGST) credits to pay off any remaining liabilities.

4. Reverse charge mechanism (RCM)

Under normal circumstances (forward charge), the supplier collects and pays the tax. However, under the Reverse Charge Mechanism (RCM), the liability to deposit tax shifts entirely to the recipient of the goods or services.

• Because the recipient is not discharging "output tax" but is paying on behalf of the supplier, RCM liabilities must be paid entirely in cash and cannot be offset using the Electronic Credit Ledger. Once the RCM tax is paid in cash, the recipient can claim the corresponding ITC in the same month, provided they are otherwise eligible.

5. Tax collection at source (TCS) & tax deduction at source (TDS)

To prevent revenue leakage and ensure a robust audit trail, GST mandates specialised collection mechanisms:

• TCS by e-commerce operators (Section 52): Electronic Commerce Operators (ECOs) are mandated to collect tax on the "net value of taxable supplies" made by other suppliers through their platforms. The current TCS rate is 0.5% (0.25% CGST + 0.25% SGST, or 0.5% IGST).
• TDS by government entities (Section 51): Government departments, local authorities, and specified agencies must deduct tax at source at the rate of 2% (1% CGST + 1% SGST, or 2% IGST) from payments made to suppliers for contracts where the total taxable value exceeds ₹250,000.
• Benefit to the supplier: Both TDS and TCS are paid to the government by the deductor/collector and subsequently flow into the actual supplier’s electronic cash ledger once the supplier accepts the auto-populated entries on the portal.

6. Treatment of advance payments 

The time of supply rules dictate when tax is due. A critical divergence exists between goods and services:

• Services: Tax must be discharged at the time an advance payment is received for future services. If the applicable rate or nature of supply is unclear at the time of advance, it must be taxed at an 18% rate and treated as an interstate supply.
• Goods: Registered persons (excluding those under the composition scheme) are exempt from paying GST on advances received against the supply of goods. For goods, the tax is payable only when the invoice is issued.

7. Payment in instalments

As a relief measure, Section 80 allows taxpayers facing financial hardship to apply for permission to pay their tax dues in up to 24 monthly instalments. However, this facility is strictly for demand orders or other dues; it cannot be used for self-assessed tax liabilities declared in periodic returns. Interest applies, and any default in a single instalment renders the entire outstanding balance immediately payable.

Managing GST payments and collections correctly

The GST payment and collection framework is a highly digitised system built around electronic ledgers and defined utilisation rules. Taxpayers need to correctly manage their cash and credit balances while accounting for specific requirements relating to RCM, TDS, TCS and advance payments. The framework also provides instalment facilities in eligible cases for taxpayers facing financial difficulties.

Keeping these payment processes organised can help businesses maintain accurate GST compliance and avoid unnecessary payment or reconciliation issues. Masters India can support this process through GST software and APIs that help businesses manage GST compliance and related workflows more efficiently.