Every GST and Income Tax Appeal Deadline in One Place

If you have ever received a tax order that felt wrong, one question comes before everything else: how much time do I have to fight this?

That single date decides your case. In tax law, a strong argument filed late is still a lost argument. Appellate authorities have very limited power to forgive delay, and in 2026 that is stricter than ever.

Two big things changed this year. The GST Appellate Tribunal finally started hearing matters, and the backlog filing window shut on 31 July 2026. At the same time, the Income-tax Act, 2025 replaced the 1961 Act from 1 April 2026. Section numbers moved. Form 35 became Form 99. Form 36 became Form 115.

So we put every GST and income tax appeal deadline in one place. No long legal quotes, just the clock, the form, and what happens if you miss it. If a deadline is already close, talk to a GST consultant in Gurgaon before you do anything else.

Why the Date Matters More Than the Argument

Most taxpayers lose appeals for boring reasons, not legal ones. The order sat unread in a spam folder. The team assumed the demand notice and the penalty order shared one deadline. Someone counted "three months" as ninety days and filed on day 92.

Courts have been clear and unsympathetic here. In a batch of writ petitions in 2026, the Delhi High Court held that an appellate authority under GST simply has no power to condone delay beyond the limit written in Section 107, and that the Limitation Act cannot be borrowed to rescue a late appeal. Once the outer limit passes, the door closes.

That is why a calendar entry is worth more than a clever ground of appeal.

GST Appeal Deadlines: The Complete List

• Stage: First appeal to Appellate Authority (Sec 107) — Form: APL-01 — Time Limit: 3 months from date order is communicated — Extra Time Allowed: 1 further month, if sufficient cause is shown
• Stage: Department appeal / review (Sec 107(2)) — Form: APL-03 — Time Limit: 6 months from communication — Extra Time Allowed: 1 further month
• Stage: Appeal to GST Appellate Tribunal (Sec 112) — Form: APL-05 — Time Limit: 3 months from communication of the appellate order — Extra Time Allowed: 3 further months, at the Tribunal's discretion
• Stage: Cross-objection before GSTAT — Form: APL-06 — Time Limit: 45 days from receipt of notice of appeal — Extra Time Allowed: Limited, at Tribunal's discretion
• Stage: Rectification of an order (Sec 161) — Form: Application — Time Limit: 3 months from the date of the order — Extra Time Allowed: None
• Stage: Revocation of cancelled registration — Form: REG-21 — Time Limit: 90 days from cancellation order — Extra Time Allowed: Extension by proper officer

Pre-deposit is part of the deadline. An appeal filed on time but without pre-deposit is treated as defective. For the first appeal you pay the admitted tax in full, plus 10% of the disputed tax, capped at ₹20 crore under CGST and a matching ₹20 crore under SGST. For the Tribunal you pay a further 10% of the remaining disputed tax, again capped at ₹20 crore. These reduced caps came in through the Finance (No. 2) Act, 2024 and were a genuine relief for cash flow.

The GSTAT backlog window is now shut. For appellate orders passed before 1 April 2026, the government gave a special filing window that was extended once, from 30 June to 31 July 2026, after the portal buckled under nearly 30,000 filings in a fortnight. That window has closed. For every order communicated after 1 April 2026, the normal three-month clock under Section 112 applies, and filing is fully electronic on the GSTAT e-filing portal.

If you generated a token on the portal before 31 July because of technical failures, remember your appeal in Form GST APL-05 must be completed within 60 days of that token. A token is an intention to file, not a filing.

Recommended: How to Reply for GST Notice: File Reply to the Issued Notice by Tax Officer

Don't Forget the Reply Deadlines That Come Before the Appeal

Half of all GST appeals exist because someone missed a reply window. Keep these in front of you: REG-03 clarification in 7 working days, ASMT-10 scrutiny notice usually 30 days, RFD-08 refund rejection notice 15 days, and DRC-01 show cause notice 30 days as mentioned in the notice.

Reply well at this stage and you may never need an appeal at all.

Income Tax Appeal Deadlines Under the New Act

From 1 April 2026, the appeal chapter sits in Sections 356 to 374 of the Income-tax Act, 2025. The hierarchy has not changed. The numbers and forms have.

• Stage: First appeal, JCIT(A) — Old Section: 246A — New Section: 356 — Form: Form 99 — Time Limit: 30 days from service of demand notice or order
• Stage: First appeal, CIT(A) — Old Section: 246A — New Section: 357 — Form: Form 99 — Time Limit: 30 days from service of demand notice or order
• Stage: Appeal to ITAT — Old Section: 253 — New Section: 362 — Form: Form 115 — Time Limit: 2 months from the end of the month in which the order is communicated
• Stage: Cross-objection before ITAT — Old Section: 253(4) — New Section: 362 — Form: Form 116 — Time Limit: 30 days from receipt of notice of appeal
• Stage: Appeal to High Court — Old Section: 260A — New Section: 371 — Form: Memorandum of appeal — Time Limit: 120 days from receipt of the ITAT order
• Stage: Appeal to Supreme Court — Old Section: 261 — New Section: 372 — Form: SLP — Time Limit: As per Supreme Court rules, generally 90 days
• Stage: Revision by Commissioner — Old Section: 264 — New Section: 377 / 378 — Form: Application — Time Limit: 1 year from the date of the order

Note the ITAT rule carefully, because it trips people up. It is no longer a flat 60 days. It is two months from the end of the month in which the order reaches you. An order communicated on 3 September gives you until 30 November. An order communicated on 28 September gives you the same date. Use the shorter mental deadline and file early.

Penalty orders are separate orders. If a penalty under the new Act arrives after your assessment order, it carries its own 30-day clock and its own appeal. Assuming the assessment appeal covers it is one of the most expensive mistakes we see.

The 20% Rule Is About Stay, Not Entry

There is a lot of confused writing online claiming you must pre-deposit 20% of the demand to file an income tax appeal. That is not correct. Unlike GST, there is no statutory pre-deposit to file a first appeal before the JCIT(A) or CIT(A).

The 20% figure comes from CBDT instructions on stay of demand. If you want recovery of the balance held back while your first appeal is pending, you normally pay 20% of the disputed demand and apply for stay, now under Section 340(6) of the new Act. In genuine hardship cases the Assessing Officer can grant stay on a lower amount, and a reasoned order is required. Also remember any pending refund can be adjusted against that 20%, so ask before you pay fresh money.

Must Read: Understanding and Resolving Inflated GST Tax Demands

If You Have Already Missed the Date

Do not give up quietly, but do not expect a soft landing either.

Under GST, condonation is available only within the extra month for a first appeal and the extra three months at the Tribunal. Beyond that, the appellate authority has no power, and your only remaining option is a writ petition before the High Court, which succeeds mainly where natural justice was denied or the portal genuinely failed.

Under income tax, the position is friendlier. Appellate authorities can admit a late appeal on sufficient cause, and Section 377 or 378 revision before the Commissioner gives you a full year. Rectification of an apparent mistake is a separate, quieter route worth checking first.

Whatever the route, evidence matters. Keep portal screenshots, grievance ticket numbers, hospital records or courier proofs. A condonation petition backed by documents works. One backed by adjectives does not.

Five Habits That Protect Your Appeal Rights

• Log every order on the day it is communicated, not the day you read it.
• Diarise two dates for each order, the real deadline and an internal deadline seven days earlier.
• Check the GST portal and the income tax portal weekly, since service is deemed complete once uploaded.
• Treat pre-deposit as a filing document, not a payment task.
• Keep one folder per dispute, from the first notice to the last reply.

How DSRV India Helps

At DSRV and Co LLP we have spent more than 30 years handling exactly these situations. As one of the established chartered accountant firms in Gurgaon, our team tracks limitation dates, prepares reconciliations that often shrink the demand before an appeal is even argued, computes and pays pre-deposits correctly, and represents clients before GST authorities, the GSTAT, the CIT(A) and the ITAT.

We also review pending orders for clients who are not sure whether a live remedy still exists. Very often, it does.