Our mission
To make tax calculation and financial planning simple, accurate and accessible for every Indian taxpayer – so you can make better decisions and focus on what matters most.
Who builds it
NewRegimeTax is built and maintained by Trebots, a software studio run by a team of engineers who build real-world tools for businesses and individuals. This calculator is one of our initiatives to create helpful, trustworthy and easy-to-use financial tools for everyone.
What we stand for
We implement tax rules from the Finance Act / Union Budget and verify calculations against known-correct figures. How we calculate →
All calculations happen in your browser. We don't collect, store or track your personal or financial data.
No sign-up, no hidden costs. The calculator and all guides are completely free to use.
We cite official sources and explain the method in plain language so you can understand the results.
We keep it current
Tax slabs, rebates and surcharge rules change with each Union Budget. We update the calculator's data after every Budget announcement and re-run our full test suite to confirm the calculations are correct.
Not professional tax advice
NewRegimeTax is an informational estimator, provided "as is" for general guidance. It is not tax, legal or financial advice. Tax rules can be complex and individual situations vary, so results are estimates and may differ from your final liability. Always verify your numbers with a qualified Chartered Accountant before filing.
Get in touch
Questions, corrections or feedback? Use the contact form, email contact@newregimetax.com, or reach the studio at trebots.com. If you spot a figure you think is wrong, please tell us – we reproduce and investigate every report, and reply within two working days.
How the site is made
NewRegimeTax started in 2025 as an internal tool at Trebots: a spreadsheet for checking which regime made sense for our own team after Budget 2025 rewrote the new-regime slabs. The spreadsheet became a web page, the web page grew a test suite, and the questions colleagues kept asking became the guides. It is still built the same way – by engineers who file their own returns and want the number to be right.
How a change gets published
- 1Read the primary source
Budget speech, Finance Bill or CBDT circular – and note exactly what changed and from which financial year.
- 2Update the data file
Never the calculation logic, unless the mechanism itself changed (as marginal relief did in 2025).
- 3Run the test suite
Hand-verified figures covering the rebate edge, marginal relief, each surcharge band, capital gains and business income. Every case must pass.
- 4Re-generate the salary pages
From the same engine, so a figure on a guide can never disagree with the calculator.
- 5Date the page
Every guide shows when it was last updated and which financial year it applies to.
Where the rules come from
Every rate, limit and threshold lives in one data file with its source noted beside it: the Finance Bill and Budget memorandum, the Income Tax Department's slab tables, and the Income-tax Act 2025 for the renumbering from 1 April 2026. When a news report and the Act disagree, the Act wins.
What we deliberately don't do
No accounts, no uploads – the calculator runs in your browser and we never see your salary. No "tax-saving" sales pitch – under the new regime most 80C products don't reduce your tax, and we say so, including on our Resources page where partner links are disclosed. No personalised advice – that is a Chartered Accountant's job.
Corrections
When a reader reports a figure and we confirm the error, we fix it, re-run the tests, and note the change on the affected page. If you think something is wrong, tell us – it is the most useful message we can get.