Income tax calculator — old vs new regime, side by side
Two regimes, one screen, the difference in rupees.
New regime
Lower tax₹0
Taxable income ₹11,25,000
Old regime
₹1,11,800
Taxable income ₹9,75,000 after ₹2,25,000 of deductions
How to use income tax calculator
- 1Enter your numbers in the fields above. The result updates as you type — there is no calculate button to press and nothing is submitted anywhere.
- 2Check the assumptions shown under the result. A calculator is only as good as the rate, term and rounding it assumes, and those are stated rather than buried.
- 3Read the working, not just the headline figure. Where a calculation has components — interest, principal, tax, slab — they are shown separately so the answer can be checked by hand.
- 4Note the figure down before you close the tab: nothing is stored, so a result you forget to note is gone.
Why this tool, and why browser-side
Choosing a regime is a one-way decision in most cases and it must be made before the deadline, often without a clear comparison. The old regime rewards deductions; the new regime rewards a larger standard deduction and a higher rebate threshold with no paperwork.
The answer flips depending on one number: how much you can genuinely claim under 80C, 80D, HRA and home-loan interest. Around 3.75 lakh of deductions is the usual crossover point, but it shifts with income level.
Surcharge and cess change the total meaningfully at higher incomes, so comparing only at slab rates gives a wrong answer for anyone near a surcharge threshold.
Calculators are the tools people return to — a loan decision this month, a tax check at year end, a BMI reading at a clinic visit. Reaching for a page that uploads nothing and logs nothing makes the return visit a comfortable one.
Every calculation runs in your browser as you type. There is no request in flight, so there is no privacy-policy asterisk to read: the salary, the loan amount, the medical figures and the dates you enter are never transmitted.
Results are shown with the working rather than as a bare number. That matters when a loan officer, a school form or a tax portal wants the figure to be justifiable, and it matters more when the figure is one you are going to argue with.
The income tax calculator on this page is deliberately narrow: it answers one question, states the assumptions beside the answer, and does not ask for an email or an account first. That is the whole design — a calculator you can open, use and close without leaving anything of yourself behind.
The figure that matters is often not the one you asked for. On a loan, the monthly instalment is fixed by your cash flow while the total interest is what changes with the tenure; on a tax computation, the useful output is the difference between two regimes rather than one regime’s liability; on a retirement projection, the assumption that does the most damage is a return figure that is one percentage point too optimistic over thirty years.
Money calculators are only as good as the assumptions behind them, which is why the assumptions are shown next to the answer rather than buried in a footnote. A compound interest projection assumes the rate holds for the entire term, and no rate in India is guaranteed like that — PPF is re-notified every quarter and deposit rates change with the policy cycle. Treat a projection as a planning scenario and check the current rate before you commit money to it.
Accepted inputs are PDF files up to 50 MB. SVG, HTML and other script-bearing formats are refused outright rather than sanitised, because a file that can execute code has no business being re-encoded — and an upload field that accepts one is a security hole rather than a feature. The tool works on one file at a time, which keeps the result unambiguous.
How it works under the hood
The new regime is computed on slab rates applied to gross salary after the standard deduction, with the Section 87A rebate applied below the threshold and marginal relief where income only marginally exceeds it. The old regime applies the older slabs to income reduced by HRA, standard deduction and Chapter VI-A deductions, subject to their individual caps. Health and education cess at 4% is added to both, and surcharge is applied on sliding bands with the standard 15% cap on capital-gains-adjacent income ignored since only salary income is modelled. The arithmetic follows the published formulas rather than approximations: loan instalments use the standard reducing-balance annuity formula; recurring and fixed deposits compound at the frequency the instrument specifies; tax and slab figures are applied in the order the statute defines, including surcharge and cess where relevant; age is computed on the calendar by borrowing months the way an eligibility clause does, not by dividing total days. All of it is evaluated in your browser with double-precision floating point, and each result is rounded only for display, which is why the figure you see and the figure you recompute agree to the rupee. The calculation runs locally in your browser. The page or its code may still require a connection to load, and offline use is not guaranteed. Review the assumptions and independently verify important decisions.
Frequently asked questions
Which regime is better for a salaried person with no investments?
The new regime, almost always. Without 80C, 80D and HRA claims, the old regime offers nothing the new one does not, and the new one has a lower effective burden at most income levels.
How much 80C investment makes the old regime worthwhile?
As a rough rule, once your total deductions (80C, 80D, HRA, home-loan interest, NPS) cross about ₹3.75 lakh, the old regime starts to win. Both columns are shown here so you can see your own crossover rather than trusting a rule of thumb.
Are the rates here current?
The calculator uses the slab structure for the current financial year as recorded by the maintainer. Tax law changes every February, so always confirm against the Income Tax Department's published rates before filing.
Is the new regime better for me?
It depends on your deductions. The break-even for a salaried taxpayer commonly sits around 3.5 to 4 lakh of total deductions including the standard deduction; below that the new regime usually wins and it becomes more favourable as income rises.
Does the calculator include surcharge and cess?
Yes, both are applied in the order the statute defines, along with the rebate where it applies. What it does not model is income that is taxed at special rates, such as capital gains, which should be computed separately.
Are these results financial or medical advice?
No. They are arithmetic on the numbers you supply, with the assumptions stated. A projection is not a forecast, a tax figure follows rules recorded at a stated date, and BMI is a screening indicator rather than a diagnosis.
Do you store the numbers I type?
No. The calculation runs in the page with no request in flight, so there is nothing to store on our side. Refreshing the page clears everything — which is also why we cannot recover a calculation you forgot to note down.
How current are the rates and slabs?
Each rate or slab carries the date it was recorded and the source it came from. Tax and interest rates change, so the page tells you to verify against the official source before acting on a figure — that instruction is not legal boilerplate.