A bonus or RSU vesting is taxed as part of your total income for the year, usually at your highest marginal slab rate since it stacks on top of your regular salary — this shows what you actually keep.
The bonus or RSU value is added to your base salary to compute total taxable income, and tax is calculated on that combined figure using the full slab structure. Because it's added on top, the bonus effectively gets taxed at whatever rate applies to the highest slab your total income now reaches — often 30% plus cess for anyone already in the top bracket.
No — for tax purposes a bonus and RSU vesting value are both treated as regular salary income, added to your total for the year and taxed at the applicable slab rates. There is no separate, lower "bonus tax rate" in India.
RSUs are taxed as a perquisite at their fair market value on the vesting date, added to salary income in that year. A second tax event — capital gains — applies separately when the shares are eventually sold, based on the gain since vesting.
Yes, if your employer doesn't know about other income or hasn't accounted for a large bonus correctly, TDS deducted during the year can undershoot what's actually due — leaving a balance payable when you file. This calculator shows the real liability so you can plan for that gap.
Figures are estimates for informational purposes only, based on the assumptions you enter, and are not tax advice. Consult a Chartered Accountant or the Income Tax e-filing portal before filing.