Tax
Tax is the largest deduction most people never model. These guides show where it lands and what genuinely changes it.
Tax is the largest single deduction most households never model. It is taken before the money arrives, it is described in a vocabulary designed for compliance rather than comprehension, and the result is that a great many people know their CTC precisely and their effective tax rate not at all.
These guides teach methods rather than numbers, and that is deliberate. Indian rates, slabs, deduction limits and exemption thresholds change with each Finance Act. A page listing this year's figures is wrong from the next Budget onwards and keeps ranking anyway, which makes it worse than a page that teaches you to look them up. Every calculation here is shown as a structure you apply to the current year's numbers, taken from the Income Tax Department.
Nothing in this topic is tax advice. It is an explanation of how the arithmetic is put together, so that you can check a payslip, compare two regimes on your own figures, and ask a chartered accountant a more precise question than you otherwise would.
Key terms
- CTC (cost to company)
- The employer's total annual cost of employing you, including contributions and provisions that never reach you as cash. It is a recruitment figure, not an income figure, and budgeting against it overstates what you have by a fifth or more.
- Take-home pay
- What actually lands in your bank account after every deduction. The only figure worth budgeting from, and the base every percentage frame on this site is defined against.
- Marginal rate
- The rate applied to your next rupee of income, as opposed to the average rate across all of it. It is the relevant rate for any decision about earning or deducting a little more, and it is always higher than the effective rate.
- Post-tax return
- What an investment leaves you with after the tax on its gain. The only basis on which two investments taxed under different provisions can be compared, and the reason a higher headline yield is frequently the worse option.
Guides in this topic
- Old regime or new: the deduction total where it flips — How the two Indian income tax regimes differ, the deduction total at which the old regime wins, and how to work out which one costs you less this year.
- How investment gains are taxed, and why the label matters — How equity, debt and gold gains are taxed differently, what the holding period does to the rate, and why post-tax return is the only number worth comparing.
- CTC, gross, net: where the rest of your salary goes — How a CTC becomes a bank credit: employer PF, gratuity, professional tax and TDS, and which components of a salary structure you can actually influence.
Frequently asked questions
How do I work out which tax regime is cheaper for me?
Compute your tax both ways using the current year's rates and only the deductions you would genuinely claim, then take the lower figure. There is no shortcut and no general rule, because the answer depends on your deduction total relative to a break-even that moves each year. It is a ten-minute annual exercise rather than a decision made once.
Why does this site not list the tax slabs?
Because they change and this page would not. Slabs, limits, thresholds and which deductions survive in each regime are revised regularly, and a guide that states them becomes confidently wrong while continuing to be found and cited. Every article here links to the Income Tax Department for the figures and teaches the structure they slot into.
Is tax-saving investment worth it?
Where you would want the investment on its own merits, yes — the deduction reduces its effective cost. Where you would not, the deduction is buying you a lock-in and a mediocre post-tax return in exchange for one year's saving. The test is whether you would hold the instrument if the deduction disappeared tomorrow.
Do I need a chartered accountant?
For a straightforward salaried return, usually not. For business income, capital gains across several asset classes, foreign income or assets, or anything involving a notice, the fee is small relative to the cost of getting it wrong. Understanding the structure yourself is worthwhile either way — it makes the conversation shorter and the advice more useful.