GST Interest on Late Payment: Rules, Rates & Calculation (FY 2025 26)

GST Interest on Late Payment: Interest Rates, Calculation & Rules (FY 2025-26 | AY 2026-27)

Last Updated: June 2026

Businesses registered under GST must pay their tax liability within the prescribed due dates. If GST is paid after the due date, interest becomes payable under the GST Act. Understanding GST interest provisions is important to avoid penalties, notices, and additional tax costs.

This guide explains GST interest rates, calculation methods, delayed payment rules, wrongful ITC claims, refund-related interest, and practical examples applicable for FY 2025-26 (AY 2026-27).

Quick Answer: What is GST Interest?

GST interest is charged when a taxpayer:

• Pays GST after the due date
• Makes short payment of GST
• Wrongly claims Input Tax Credit (ITC)
• Wrongly reduces tax liability

Interest is generally charged at:

What is Interest Under GST?

Interest under GST is a statutory liability imposed on taxpayers who fail to discharge their GST obligations within the prescribed time.

The purpose of GST interest is to compensate the government for delayed tax payments and discourage non-compliance.

Interest becomes payable automatically and does not require a separate notice from the GST department.

When is GST Interest Levied?

According to Section 50 of the CGST Act, GST interest becomes applicable in the following situations:

1. Delay in Payment of GST

If GST liability is not paid before the due date.

2. Short Payment of GST

If a taxpayer pays less GST than required.

3. Wrongful ITC Claim

If Input Tax Credit is claimed without eligibility.

4. Excess ITC Utilization

If excess ITC is utilized against GST liability.

5. Incorrect Reduction of Tax Liability

If output tax liability is reduced beyond what is legally allowed.

GST Interest Rates in FY 2025-26

The interest is calculated from the day after the due date until the date of actual payment.

GST Interest Calculation Formula

$\text{Interest}=\frac{\text{Tax Liability}\times\text{Interest Rate}\times\text{Number of Days}}{365}$Liability×Interest Rate×Number

Example 1: Delayed GST Payment

GST Liability = ₹4,00,000

Interest Rate = 18%

Delay = 30 Days

Interest Payable:

₹4,00,000 × 18% × 30 ÷ 365

Interest = ₹5,918 (approx.)

Interest on Net Cash Liability

Under current GST provisions, interest is generally calculated on:

Net Cash Liability

Net Cash Liability = Gross GST Liability – Available ITC

This provides relief to taxpayers by ensuring that interest is not charged on the entire gross liability where valid ITC is available.

Cases Where Interest is Charged on Gross Liability

Interest may be charged on gross liability in cases involving:

• Fraud
• Wilful misstatement
• Suppression of facts
• Wrongful ITC claims
• Tax evasion

Such cases may also attract penalties and departmental proceedings.

Interest on Delayed GST Refunds

If the GST department delays a refund beyond the prescribed period, interest may become payable to the taxpayer.

Refund Interest Rate

Generally, delayed GST refunds attract:

6% interest per annum

In specific cases involving appellate orders, higher rates may apply according to prevailing legal provisions.

Common Reasons Businesses Receive GST Interest Notices

Many businesses receive GST notices because of:

• Late GST return filing
• Incorrect GST calculations
• Mismatch in GSTR-1 and GSTR-3B
• Wrong ITC claims
• Invoice mismatches
• Failure to file nil returns

Regular compliance helps reduce notice risks.

How to Avoid GST Interest and Penalties

File GST Returns on Time

Never miss GSTR-1 or GSTR-3B due dates.

Reconcile ITC Monthly

Match purchase records with supplier returns.

Verify GST Calculations

Review tax liability before filing returns.

Maintain Proper Accounting Records

Keep invoices and tax documents organized.

Use Professional GST Services

Professional GST consultants help prevent costly filing errors.

GST Compliance Checklist for FY 2025-26

Monthly

• GSTR-1 Filing
• GSTR-3B Filing
• ITC Reconciliation

Quarterly

• Review GST Ledger
• Verify Vendor Compliance

Annually

• Annual GST Reconciliation
• Audit Preparation (if applicable)
• Tax Planning Review

Frequently Asked Questions (FAQs)

What is the GST interest rate for late payment?

GST interest is generally charged at 18% per annum on delayed tax payments.

When does GST interest start?

Interest starts from the day after the GST payment due date.

Is GST interest mandatory?

Yes. GST interest becomes payable automatically if tax is paid late.

Is GST interest calculated on gross liability?

Generally, interest is calculated on net cash liability, subject to certain exceptions.

What is the interest rate for wrongful ITC claims?

Wrongful ITC claims can attract interest at 24% per annum.

Can GST interest be waived?

Only if specific government notifications provide relief or exemptions.

Is interest payable on nil GST returns?

No interest is payable if there is no tax liability, but returns should still be filed where required.

Can GST interest result in notices?

Yes. Persistent delays and mismatches may trigger departmental notices.

Does GST interest apply to all businesses?

Yes, if a registered taxpayer delays payment or violates applicable GST provisions.

How can businesses avoid GST interest?

Timely filing, accurate accounting, ITC reconciliation, and professional compliance support can help avoid GST interest and penalties.

Conclusion

GST interest is an important compliance provision that businesses must understand. Delayed GST payments, short payments, and wrongful ITC claims can result in interest liabilities ranging from 18% to 24% per annum. Maintaining accurate records, filing returns on time, and conducting regular reconciliations can help businesses remain compliant and avoid unnecessary costs.

For FY 2025-26 (AY 2026-27), every GST-registered business should review its GST processes regularly to minimize risks, avoid notices, and ensure smooth tax compliance.