Stock options are now a standard part of the pay package across India’s technology, financial services and professional sectors. Their tax treatment remains among the least understood areas of personal taxation for a simple reason: an ESOP (employee stock option plan) is taxed twice, at two separate moments, under two different heads of income, and the first of those moments usually arrives before the employee has seen any cash. What follows is a walk through the rules as they currently stand.Sections are cited from the Income-Tax Act, 2025, in force from April 1, 2026, with the corresponding provision of the 1961 Act in brackets. The two numbering systems collide in places, so the brackets matter: For instance, section 197 of the new Act is the long-term capital gains charge, while section 197 of the old Act was the lower-withholding certificate.When is an ESOP taxed?An option passes through four stages. It is granted, it vests, it is exercised and the resulting share is eventually sold. Only the last two attract tax.Tax arises at two points. On exercise, the benefit is charged as salary, in the form of a perquisite. On sale, the further appreciation is charged as capital gains. The two charges are separate, they fall in different years more often than not, and they are computed on different bases.How is the taxable value of perquisite computed on exercise?Section 17 of the Income-Tax Act, 2025 (Section 17(2)(vi) of the 1961 Act) treats the difference between the fair market value of the share and the price the employee actually paid as a taxable perquisite (Perquisite = Fair market value on the date of exercise − Exercise price paid). Determination of fair market value (FMV) is not left to the employer’s discretion. For a listed company, the FMV is the average of the opening and closing price of the share on a recognised stock exchange on the date of exercise. For an unlisted company, it must be certified by a Category I Merchant Banker, and the certificate must be dated within 180 days of the exercise date. These were rules 3(8) and 3(9) of the 1962 Rules, now carried into rules 15(6) and 15(7) of the Income-Tax Rules, 2026.An illustration will be used throughout this piece. An employee holds 1,000 options at an exercise price of ₹100. On the date she exercises, the FMV is ₹500. Her perquisite is ₹400 a share, or ₹4 lakh. That sum is added to her salary and taxed at her slab rate. Her employer must deduct tax on it under Section 392 (Section 192) and report it in Form 123 (Form 12BA) and Form 130 (Form 16).She has not sold anything at this stage. Where does the money to pay that tax come from?Nowhere — and that is the difficulty. She has already paid ₹1 lakh to acquire the shares and now owes tax on a further ₹4 lakh that exists only on paper. Practitioners call this the “dry tax” problem. In an unlisted company it is sharper still, since the valuation driving the tax is itself an estimate, and the shares may not be saleable at any price for years.Relief is available, though narrowly. Employees of start-ups recognised by the DPIIT and eligible under Section 140 (Section 80-IAC) may have the employer’s withholding (TDS) deferred, under Section 392(3) (Section 192(1C)). The tax falls due within 14 days of the earliest of three events:* The expiry of 48 months from the end of the relevant assessment year or roughly five years from allotment;* The date the shares are sold; or* The date the employee leaves.Note what the deferral does and does not do. It postpones collection. The charge itself still crystallises on the date of exercise, at that year’s slab rates, and the liability does not shrink while it waits.How is the capital gain computed when the shares are sold?This is where the most expensive errors occur, and there are almost always errors in the cost of acquisition.The cost is not the exercise price the employee paid. Under Section 73(1) (Section 49(2AA)), where an FMV has already been taxed as a perquisite, that same FMV becomes the cost of acquisition. The reasoning is simply that the gap between the exercise price and the exercise-date FMV has been taxed once already, as salary, and taxing it a second time on sale would be double taxation.Capital gain = Sale consideration − FMV on the date of exercise − Expenses of transferContinuing the illustration, she sells all 1,000 shares at ₹900. Sale consideration is ₹9 lakh. Her cost is ₹5 lakh, being the exercise-date FMV of ₹500, not the ₹100 she paid. The capital gain is ₹4 lakh.An employee who takes ₹1 lakh as her cost instead would declare a gain of ₹8 lakh and pay tax twice on the same ₹4 lakh. On a large exit, the mistake runs into lakhs, and it is common.What is the rate of tax applicable on the capital gain?Two variables decide it: Whether the share is listed, and how long it was held.On listed equity shares where STT (securities transaction tax) has been paid, a short-term gain is taxed at 20 per cent under Section 196 (Section 111A). A long-term gain is taxed at 12.5 per cent under Section 198 (Section 112A), on the amount above ₹1.25 lakh in the financial year. On unlisted shares, a short-term gain is taxed at slab rates, which can reach up to 30 per cent before surcharge and cess, while a long-term gain is taxed at 12.5 per cent under Section 197 (Section 112). Indexation is not available in either case.Surcharge widens the gap further and is often overlooked. On salary income (ESOP perquisite) it can rise to 25 per cent under the default/ new regime. On capital gains from listed shares, it is capped at 15 per cent.From which date is the holding period counted — the exercise date or the allotment date?From the date of allotment. The holding period of a capital asset can only begin once the asset exists, and the share comes into existence in the employee’s hands when it is allotted and credited to her demat account or entered in the register of members.Counted from that date, a listed equity share becomes long-term once it has been held for more than 12 months. An unlisted share needs more than 24 months. Anything shorter is short term.An employee selling anywhere near the long-term threshold should take the date from her demat statement rather than assume it matches the exercise date.The two dates do different jobs, and it is worth keeping them apart. The exercise date fixes the perquisite value and, through it, the cost of acquisition. The allotment date starts the holding-period clock.When is tax deducted at source?Many assume withholding happens once, at exercise, and that the sale proceeds reach them net of tax.At exercise, the employer withholds tax under Section 392 (Section 192) as part of salary and reported in Form 123 (Form 12BA) and Form 130 (Form 16). Eligible start-ups may defer this.At sale, it depends on the route. On an ordinary secondary sale between two residents, and on a resident-to-resident tender offer, there is generally no withholding at all. The seller must estimate her own liability and pay advance tax, and failing to do so is what produces interest under Sections 424 and 425 (Sections 234B and 234C) at assessment.Where the seller is a non-resident, Section 393(2) (Section 195) places a withholding obligation on the payer, subject to relief under the applicable tax treaty. A nil or lower deduction certificate is applied for under Section 395 (Section 197). This has become a live issue as employees often exercise in India and sell after moving abroad.Residential status also shapes the charge itself. A resident and ordinarily resident employee is taxed on global income, including gains on options in a foreign parent. A non-resident or a resident but not ordinarily resident is taxed only on the portion attributable to services rendered in India, an apportionment that gets complicated where the vesting period straddles more than one country.Given the rate difference, what does sensible planning look like on the sale side?The arithmetic is worth running before any sale, because on the same gain, it produces materially different outcomes.Take our employee’s gain of ₹4 lakh. If the shares are listed and she sells within 12 months, she pays ₹80,000 (4 lakh x 20 per cent). Past 12 months, she pays 12.5 per cent on ₹2.75 lakh (after the ₹1.25-lakh exemption), or ₹34,375. If the shares are unlisted and she is in the 30 per cent bracket, selling within 24 months costs ₹1.2 lakh (4 lakh x 30 per cent) against ₹50,000 (4 lakh x 12.5 per cent) after. Crossing the line is, therefore, worth ₹45,625 on the listed holding and ₹70,000 on the unlisted one.A few practical points follow. One, where a liquidity event is being planned (in case of unlisted shares), scheduling the tender, buyback or sale just past the 24-month mark, counted from allotment, converts slab-rate income into concessionally taxed gain. Two, splitting sales across financial years allows the ₹1.25-lakh long-term exemption to be used more than once and keeps gains out of the higher surcharge bands. Three, exercising early, while the FMV is low, pushes more of the eventual upside into the capital gains bucket and out of the salary bucket, though it has to be set against the dry-tax outflow and the possibility that the shares never become liquid. Four, capital losses from other assets can be set off against ESOP gains in the same year. Finally, start-up employees who use the deferral should earmark the cash, because the bill does arrive.Here’s something important. Tax is an input, not the objective. Illiquidity, further dilution, concentration risk and the plain possibility of the company being worth less later have cost employees far more than the rate differential has ever saved them. Waiting three months to cross a threshold is usually sound. Waiting 18 months in an illiquid stock for the same reason often is not.A documentation point is worth noting. Employees should obtain and keep the merchant banker valuation certificate for every exercise. Years later, it is the only evidence of the cost of acquisition, and reconstructing it after the employee has left and the company has changed hands is difficult.The author is a Partner at Venkatesh & Co. Chartered Accountants. With inputs from Desikan GovindarajanPublished on August 29, 2026