GST Payment 2026: How to Pay GST Online

Filing a GST return is only half the job. The other half is paying the tax due, and that payment runs through a separate challan, a set of digital ledgers, and a strict 15-day clock. Miss the mechanics and a return can be blocked or a late fee can pile up, even when the figures were correct. For the more than 1.51 crore taxpayers registered under GST, knowing how to pay is as important as knowing how to file.

GST payment is the process of depositing the net tax a registered business owes into the government's account through the official GST portal. It is done with a single challan, Form GST PMT-06, paid online by net banking, UPI, card, or bank transfer, and the money lands in the taxpayer's Electronic Cash Ledger.

This guide explains how to pay GST online in 2026, the challan and the ledgers behind it, the payment modes and their limits, the due dates, and what happens if a payment is late. It is written for any taxpayer or accountant who needs to settle a GST liability correctly.

What GST payment actually involves

GST payment means settling the net tax liability that remains after a business offsets its input tax credit against the GST it has collected on sales. The amount is calculated when a return is prepared, and only the balance, the net liability, is paid in cash. A business with large input credit may pay very little cash, while one with few inputs pays most of its liability in cash.

Behind every payment sit three electronic ledgers on the portal: the Electronic Cash Ledger, the Electronic Credit Ledger, and the Electronic Liability Register. Tax can be paid from input credit where available, and any shortfall is topped up with cash deposited through a challan. The ledgers update automatically as challans are paid and returns are filed.

"Form GST PMT-06 is the single challan through which a taxpayer can pay tax, interest, penalty, and fees, generated online from the GST portal before payment of the net liability." (Goods and Services Tax Network, 2026.)

Because input credit cannot be used to pay interest or penalties, those are always paid in cash, which is why understanding the split between credit and cash matters before generating a challan. A taxpayer who plans the split in advance avoids paying a challan twice.

The three GST ledgers explained

Every registered taxpayer has three ledgers on the GST portal that together track what is owed, what credit is available, and what cash has been deposited. Knowing which ledger does what prevents the most common payment mistakes, since each ledger has a specific and limited use.

The credit ledger can clear most of a tax liability for a business with steady input credit, leaving only a small cash payment. The cash ledger must always cover interest, late fees, and any reverse-charge tax, none of which can be paid from credit. The liability register is simply the running total of what the taxpayer still owes.

When GST must be paid

For most regular taxpayers, GST is due monthly, with the payment for a tax period generally required by the 20th of the following month when filing GSTR-3B. Quarterly filers under the QRMP scheme pay monthly through a challan and file the return quarterly, which keeps cash payments steady while reducing filing frequency.

The due date is fixed by the return type, so a business should align its cash flow to have the net liability ready before the deadline. Paying after the due date triggers interest from the day after the due date until the tax is actually paid, so even a one-day delay carries a cost.

The mechanics of accessing the portal to file and pay are covered in the GST portal login guide, and the rates that determine the liability are set out in the new GST rates guide. Reading both alongside this guide gives the full picture from rate to payment.

How to create a GST challan and pay online

Paying GST online starts with generating a PMT-06 challan on the portal, which takes only a few minutes. The challan records the exact amounts under tax, interest, penalty, and fees before any money moves, so the figures must be confirmed first.

Step by step

The taxpayer logs in at gst.gov.in, opens Services and then Payments, and selects Create Challan. They enter the amounts under each head, choose a payment mode, and click Generate Challan to create a Challan Portal Identification Number (CPIN). The CPIN identifies the challan throughout the payment.

The portal then redirects the taxpayer to the chosen payment channel, and once the bank confirms the payment, the amount is credited to the Electronic Cash Ledger. From there it is used to offset the liability when the return is filed, completing the payment.

Paying without logging in

A challan can also be created in pre-login mode by entering the GSTIN and a captcha, which suits a tax practitioner paying on a client's behalf. The payment still credits the registered taxpayer's cash ledger against their GSTIN, so the funds reach the right account.

GST payment modes in 2026

The GST portal accepts several payment modes, and the right one depends mainly on the amount being paid. The main online modes are net banking, BHIM UPI, and credit or debit card, alongside NEFT/RTGS and over-the-counter payment for specific needs.

UPI is the fastest route for routine amounts, while NEFT or RTGS is the practical choice for large liabilities because it carries no upper ceiling. The over-the-counter route is capped at ₹10,000 per tax period, so it suits only the smallest payments by very small taxpayers.

How net banking and UPI work

For net banking, the taxpayer selects the bank, agrees to the terms, and is redirected to the bank's portal to complete the payment before returning to the GST portal. For BHIM UPI, the taxpayer enters a UPI ID and approves the request, though the bank's own daily UPI limit, often ₹1 lakh to ₹2 lakh, can apply and force a switch to net banking for larger sums.

CPIN, challan validity, and the 8 PM rule

Every generated challan carries a CPIN that is valid for 15 days, after which an unpaid challan expires and a fresh one must be created. This window gives a taxpayer time to arrange funds, but the challan must be paid before it lapses or the figures must be re-entered.

Timing within the day also matters: any online payment made before 8 PM is credited to the Electronic Cash Ledger on the same day. Paying earlier in the day therefore ensures the ledger reflects the deposit before a deadline rather than the next working day, which is decisive on the final day of a return period.

"Any online payment made using Form GST PMT-06 before 8 PM is credited to the taxpayer's Electronic Cash Ledger on the same day." (Goods and Services Tax Network, 2026.)

A payment made after 8 PM, or by NEFT/RTGS that settles the next banking day, can credit the ledger a day later, which is why filers leave a buffer before the due date rather than paying at the last minute.

How payment links to filing the return

Payment and filing are connected, since the cash deposited through a challan is only applied to the liability when the return is filed and the liability is offset. Depositing cash alone does not file the return or discharge the liability until that offset happens, which surprises many first-time filers.

The Electronic Liability Register is reduced once the offset is completed, leaving a nil balance if the full amount was paid. Reading the three ledgers together is the simplest way to confirm a payment has actually cleared the liability rather than just sitting as a cash balance.

Paying GST under reverse charge

Under the reverse-charge mechanism, the recipient of certain supplies pays the GST instead of the supplier, and that tax must be paid in cash. Reverse-charge liability cannot be set off using input tax credit, so it always requires a cash deposit through a challan.

This applies to specified goods and services and to purchases from unregistered suppliers in defined cases, where the buyer accounts for the tax. The buyer can usually claim the reverse-charge tax back as input credit later, but the initial payment is still in cash.

Because reverse-charge payments are a frequent source of error, a business with such liabilities should track them separately each period. Missing a reverse-charge payment understates the liability and can attract interest when the shortfall is discovered.

Interest and late fees on delayed payment

Paying GST after the due date attracts interest, generally at 18% per annum on the unpaid tax, calculated from the day after the due date until payment. Interest is always paid in cash, since input credit cannot be used to settle it, and it accrues daily until cleared.

A late return also attracts a late fee per day of delay, subject to a cap, which is separate from the interest on unpaid tax. Together these make timely payment cheaper than delay, even for a business short of cash at the deadline, since the cost only grows.

Because both interest and late fees are paid through the same PMT-06 challan, a delayed taxpayer should generate a challan that includes these heads, not just the tax. Confirming the figures before paying avoids a second challan to cover a shortfall and a further delay.

Common GST payment problems and fixes

The most frequent issue is an expired challan, which happens when a CPIN is not paid within 15 days and simply needs regenerating. A new challan with the same amounts can be created in minutes, so an expiry is an inconvenience rather than a penalty.

A payment that debited the bank but does not show in the cash ledger is usually a timing or status delay, and the taxpayer should check the payment status on the portal before paying again. Paying twice for the same liability is a common and avoidable error that then needs a refund claim.

Confusing the credit and cash ledgers also causes problems, since interest and penalty cannot be paid from credit. A taxpayer who tries to offset interest with input credit will find the liability remains until cash is deposited, which can push a payment past the deadline.

Looking ahead

GST payment is becoming faster and more flexible, with UPI and card options now sitting alongside the older net banking and bank-transfer routes for the 1.51 crore registered taxpayers. The 2025 reforms also aimed at quicker refunds, which improves cash flow for businesses that carry surplus credit.

For any taxpayer, the routine is dependable: generate the PMT-06 challan, pay before 8 PM through the right mode, confirm the cash ledger, and offset the liability when filing. Following that order each period turns GST payment from a deadline scramble into a predictable monthly task.

Key takeaways

• GST is paid through a single Form GST PMT-06 challan, with the net liability deposited into the Electronic Cash Ledger.
• Tax can be cleared from input credit, but interest, late fees, penalties, and reverse-charge tax must always be paid in cash.
• Payment modes include net banking, BHIM UPI, card, NEFT/RTGS (no limit), and over-the-counter (capped at ₹10,000 per tax period).
• A challan's CPIN is valid for 15 days, and payments made before 8 PM credit the cash ledger the same day.
• Late payment attracts interest, generally 18% per annum, plus a capped late fee, both payable in cash.

Methodology

This guide draws on the official Goods and Services Tax Network payment user guides and portal documentation current as of June 2026, covering the PMT-06 challan, payment modes, and ledger mechanics. Due dates, interest rates, and late-fee caps are set by the GST Council and the law and are revised periodically, so readers should confirm current figures and deadlines on the official GST portal before paying. This article is general information about a government process and is not tax or financial advice.