CMP-08 Due Date 18 April 2026: Complete Guide for Composition Scheme Taxpayers

CMP-08 is a quarterly challan-cum-statement that must be filed by taxpayers registered under the GST Composition Scheme. For the quarter January to March 2026, the due date for filing CMP-08 and making tax payment is 18 April 2026. This form is essential for reporting summary details of turnover and paying tax on a self-assessment basis.

Under CMP-08, taxpayers are required to disclose total outward supplies, inward supplies liable to reverse charge (RCM), and the total tax payable including CGST and SGST. Unlike regular GST returns, invoice-wise details are not required in CMP-08, making it simpler but equally important for compliance.

The composition scheme is designed for small taxpayers to reduce compliance burden, but timely filing of CMP-08 is mandatory. Even if there is no business activity during the quarter, a Nil CMP-08 must still be filed to avoid future complications.

Failure to file CMP-08 on time can lead to serious consequences. As per Section 50 of the CGST Act, interest at the rate of 18% per annum is applicable on delayed tax payments. The interest is calculated from the day after the due date until the date of actual payment. Additionally, continuous non-compliance may lead to notices from the GST department and even cancellation of composition scheme registration.

In cases where tax is not paid intentionally, penalties may be imposed under Section 122 of the CGST Act. The minimum penalty can be ₹10,000 or the amount of tax due, whichever is higher. Moreover, failure to comply regularly can force the taxpayer to shift from the composition scheme to the regular scheme, increasing compliance requirements significantly.

It is important to note that CMP-08 is not just a return but also a payment mechanism. Filing is considered complete only when both the statement is submitted and tax is paid. Taxpayers must also file an annual return in Form GSTR-4 after the end of the financial year.

In conclusion, CMP-08 is a crucial compliance requirement for composition dealers. Timely filing ensures smooth business operations, avoids unnecessary interest and penalties, and helps maintain eligibility under the composition scheme. Businesses should mark the due date and ensure proper compliance to stay stress-free and legally secure.