Tax
Section 50 of the CGST Act imposes interest of 18% per annum on tax paid after the due date and a higher 24% where input tax credit has been wrongly availed, turning delayed payments into a measurable financial burden for businesses.
Check your DPDP readiness — free More on the blogWhen a GST liability is not settled by the prescribed due date, the law automatically triggers an interest charge. This interest accrues for every day the amount remains unpaid, without waiting for any assessment or notice from the tax department. The mechanism is built into the statute, meaning the liability exists the moment the payment is late, and it continues until the full amount is cleared.
For a regular delay – that is, when tax is simply paid late – the Act prescribes an interest rate of 18 per cent per annum. The calculation is straightforward: the unpaid amount is multiplied by 18 per cent and then prorated for the exact number of days the payment is overdue. This rate applies regardless of the size of the liability, making it a uniform cost for all delayed payments.
If a business has wrongly availed input tax credit and subsequently used it to offset its output tax, a harsher penalty applies. Section 50(3) raises the interest rate to 24 per cent per annum on the amount that was incorrectly credited. This higher rate reflects the additional revenue loss to the government and serves as a deterrent against improper credit claims.
When a GST return is filed after the due date, interest is not levied on the entire liability. Instead, the proviso to subsection (1) limits interest to the portion of the liability that was actually discharged in cash. The unpaid balance that remains as credit does not attract interest, reducing the overall cost for businesses that file late but have already settled part of their tax. The interest calculation starts from the day after the due date and runs until the date of actual payment. It is a simple time‑value computation: daily interest equals the annual rate divided by 365, multiplied by the outstanding amount and the number of days overdue. This method ensures that the cost scales with the length of the delay. Many businesses mistakenly compute interest on the gross liability even when the return is late. The law explicitly restricts interest to the cash‑paid portion, so using the full liability inflates the cost and may lead to disputes with the tax authority. Accurate segregation of cash and credit components is essential for correct interest computation. Another common error is treating the interest as a negotiable charge that can be waived. Interest under Section 50 is a statutory levy, not a discretionary fee. The department recovers it as tax, and failure to pay it can attract further penalties, compounding the financial impact on the business. Businesses often assume that the late fee under Section 47 covers interest charges. In reality, the late fee is a separate penalty for filing a return after the deadline, while Section 50 deals exclusively with the money that remains unpaid. Both may apply simultaneously, increasing the total cost of non‑compliance. Proactive compliance – filing returns on time and paying the exact tax due – eliminates both the 18% and 24% interest burdens. Where a delay is unavoidable, calculating interest promptly and remitting it with the outstanding tax can prevent additional enforcement actions and keep the overall cost predictable.
The standard rate is 18 per cent per annum on the amount that remains unpaid after the due date. If the delay involves input tax credit that was wrongly claimed and used, the rate rises to 24 per cent per annum.
No. The proviso to Section 50(1) limits interest to the portion of the liability that was actually paid in cash. The credit balance that remains unutilised does not attract interest.
No. Interest under Section 50 arises by operation of the statute itself. It starts accruing from the day after the due date and continues until the tax is fully paid, without any need for a separate notice.
Interest under Section 50 is a statutory levy, not a discretionary fee. It is recoverable as tax, and failure to pay it can lead to further penalties, so it cannot be negotiated away.
Founder & CEO at VidhiSar. I have watched four companies pay for the same mistake, and it was never the mistake anyone expected. VidhiSar is software, not a law firm: every answer names the section it relies on so you can check it, and anything turning on your specific facts is worth putting to a professional. More about who builds this