Form 16 vs AIS mismatch when your startup forgot ESOP taxes
🎨 Aman Khurana, 29, is a senior product designer at a Series-B fintech in Cyber Hub, Gurgaon. In March 2026, he exercised 2,400 vested ESOP shares at fair-market-value ₹1,200/share, creating a ₹2.8 lakh perquisite. The startup's payroll system flagged it as "optional," so no TDS was deducted. His Form 16 (May 2026) showed clean salary. His AIS showed perquisite income. The e-Verification system caught the mismatch. Notice arrived May 4: respond within 7 days.
🚨 The problem
When an employee exercises ESOPs at below fair-market-value, the gap is taxable perquisite income under Section 17(2). The employer must deduct TDS. If they don't, the Form 16 (employer-reported salary) and AIS (auto-pulled government data) diverge. The e-Verification system flags it automatically. The employee receives an automated notice. Most startups don't have ESOP tax infrastructure; HR treats ESOP exercise as a manual event. Thousands of tech-sector employees exercise quarterly without TDS, then face mismatch notices.
🚀 How GabFORGE helped
Aman opened his Form 16/AIS notice on May 26—22 days late, past the 7-day response window. He needed to understand what the mismatch meant and whether he owed tax. Over 48 hours:
- 🔍 Clarified Section 17(2) and perquisite treatment. The agent explained that the FMV gap on ESOP exercise is perquisite income in the year of exercise, taxable whether or not TDS was deducted. Form 16 shows what the employer actually withheld; AIS shows what should have been withheld.
- 💬 Identified the corrective action. The agent explained that Aman could file a response acknowledging the perquisite, and the company should issue a corrective/supplementary Form 16 showing the ₹2.8 lakh as taxable perquisite income. The company's payroll system should then have deducted TDS on that amount.
- 📞 Escalated to HR finance. Aman forwarded the agent's explanation to his HR team, which realized they had missed ESOP tax infrastructure entirely. They corrected the Form 16 and paid the owed TDS.
Total tax liability: approximately ₹70,000 (on ₹2.8L at ~25% marginal rate). The company covered it as a corrective payment.
🇮🇳 Why this matters
Startups prioritize shipping fast; tax administration is not on the roadmap. Thousands of employees exercise ESOPs quarterly and face Form 16/AIS mismatches. Most don't know that perquisite income is Section 17(2) taxable or that the company should have deducted TDS. The automated e-Verification notice is a courtesy flag—a chance to resolve before manual audit review.
The long version has the ESOP grant (August 2021), the vesting and exercise (March 2026), the Form 16/AIS mismatch, the automated notice, and how startup payroll systems treat ESOP exercise as "optional" TDS.