Free tax and GST calculators
Calculators we use ourselves, published as they are. No sign-up, no email capture: the numbers update as you type, and nothing you enter leaves your browser.
Old vs new tax regime calculator
Compare both regimes for FY 2026-27 with the standard deduction, the section 156 rebate, surcharge and cess applied, and see which saves you more before you file.
Open calculator→Free toolGST late fee and interest calculator
The per-day late fee on a delayed GSTR-1 or GSTR-3B, capped by your turnover, plus 18 percent interest on tax paid late.
Open calculator→Free toolTrademark class finder
Type what you sell or the service you provide and find the class to file in, across all 45 classes.
Open finder→Free toolHRA exemption calculator
The least-of-three rule under section 10(13A), with the 50% limit for eight metro cities from FY 2026-27.
Open calculator→Free toolCapital gains on property calculator
12.5% without indexation against 20% with indexation, using the cost inflation index up to FY 2026-27.
Open calculator→Free toolAdvance tax calculator
What is due on 15 June, 15 September, 15 December and 15 March, and the interest under sections 424 and 425 if you pay late.
Open calculator→Free toolTDS calculator
Pick the payment and amount to see whether TDS applies, the rate and the threshold under section 393, for FY 2026-27.
Open calculator→Free toolCompliance checker
Six questions, and you get every MCA, GST, income-tax, TDS and PF filing your business must make, with the next due date for each.
Check my business→Free toolTrademark search helper
Type a brand name and what you sell: get the variants to search on IP India, the classes to cover and the words that cause objections.
Check a name→Free toolCompany name check
Test a proposed company or LLP name against the MCA Rule 8 tests and restricted words before you reserve it.
Check a name→Free toolROC late fee calculator
MCA fees to file overdue AOC-4, MGT-7, LLP Form 8 and Form 11, year by year, to the day you file.
Work it out→Free toolPresumptive tax calculator
Section 44AD and 44ADA (now section 58) against regular books: which route costs less tax for 2026-27.
Compare→Free toolIncome-tax section finder
Old section to new: 80C, 194J, 143(1) and 160 more provisions mapped from the 1961 Act to the Income-tax Act, 2025.
Look it up→Free toolGST rate finder
Every official GST rate entry for goods, searchable by HSN code or product: 5%, 18%, 40% and the special rates.
Look it up→What is coming next
An ITR form selector already lives inside our which-ITR-form guide. Next on the list are a TDS rate finder, an advance tax instalment calculator and a company incorporation cost estimator by state. The trademark class finder, HRA calculator and property capital gains calculator above are the newest additions. The compliance calendar for FY 2026-27 is published as a guide.
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Frequently asked questions
Are the FilingBase calculators free?
Yes. All the tools are free to use, with no sign-up; the calculations run in your browser.
How accurate are the results?
Each tool applies the rules and rates stated on its page for the current year. Results are estimates; the details of your case can change the answer, so confirm with a CA before you file or pay.
Which calculators are available?
An old vs new tax regime calculator, a GST late fee and interest calculator, an HRA exemption calculator, a capital gains tax calculator for property, and a trademark class finder. A gratuity calculator sits in our gratuity guide.