Income Tax Filing Deadlines & Penalties You Can't Afford to Miss in 2026

Why Deadlines Deserve Your Attention

In income tax, time literally is money. File late and you may forfeit refunds, lose the right to carry forward losses, and pay avoidable interest and fees. Here's what to watch in 2026.

Key Deadlines

• Non-audit cases (individuals, most businesses): 31 July of the assessment year.
• Audit cases: 31 October, with the tax audit report due by 30 September.
• Advance tax: Quarterly instalments in June, September, December and March.
• Belated / revised returns: Generally by 31 December.

The Cost of Missing Out

• Late fee up to ₹5,000 under section 234F.
• Interest at 1% per month under 234A/B/C.
• Loss of the ability to carry forward certain losses.

Plan, Don't Panic

The simplest way to avoid penalties is proactive planning — estimate advance tax, keep documents ready, and file early. ComplyEdge manages the whole calendar so you never miss a date.