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Free tools that show their working.
14 calculators and checkers: GST and payroll for India, plus loans and stock for anyone. No sign-up.
Facts verified 31 Oct 2026. Nothing you type is uploaded.
India GST · 9 tools
From the rate to the return.
For businesses in India: rates, place of supply, invoices, GSTINs, e-invoice, e-way bills, reverse charge and late fees. Each card shows its worked example.
- GST For India
GST calculator
Add or remove GST; CGST + SGST or IGST. Example · ₹10,000 at 18%, same state ₹11,800.00 - GST For India
HSN and SAC finder
About 170 common codes with current rates and their source. Example · Cement, HSN 2523 18% - GST For India
Place of supply checker
Which state, and whether to charge IGST. Example · Bill-to-ship-to, goods sent to Chennai Karnataka - GST For India
GST invoice generator
Fill a Rule 46 tax invoice; print or save as PDF. Example · Invoice KA/26-27/0142, within Karnataka ₹10,560.00 - GST For India
GSTIN validator
Format, state code and check character. Example · 29ABCDE1234F1ZW (made up) Valid - GST For India
E-invoice applicability checker
The ₹5 crore test, exemptions and the 2027 change. Example · Turnover ₹6.2 crore, B2B sale Required - GST For India
E-way bill validity calculator
Valid until which midnight, by distance and cargo. Example · 450 km, generated 1 Nov 2026 4 Nov 2026, midnight - GST For India
Reverse charge (RCM) checker
Does the buyer pay GST on this purchase? Example · Security services from a proprietorship RCM applies - GST For India
GST late fee calculator
GSTR-3B and GSTR-1 fee with caps, plus 18% interest. Example · GSTR-3B filed 10 days late ₹500 fee
How each tool is built
Every answer shows its working.
- 01The formula, in plain wordsEvery tool says what it works out and how, before any number.
- 02A worked exampleA made-up business, worked line by line, matching the tool’s first answer.
- 03The official sourceCBIC, GST, e-invoice, e-way bill, income-tax, EPFO, ESIC and RBI pages, with the date we checked them.
Facts last verified 31 Oct 2026. Expert review pending. These tools give estimates; confirm with your CA before you file or pay.
Kaveri Agencies, Mysuru, sells hardware worth ₹10,000 before GST to a buyer in Bengaluru at 18%.
- Taxable value
- ₹10,000.00
- CGST at 9%
- ₹900.00
- SGST at 9%
- ₹900.00
Total₹11,800.00
Source: IGST Act 2017, section 7, and Notification 9/2025-Central Tax (Rate), CBIC.
Inside MyRecords
The same sums, on every entry.
In MyRecords, invoices, pay runs, loans, assets and stock work these out from your own records; in India, GSTR-1 and GSTR-3B files are prepared for upload too.
Next step
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