Business tools
Fast Indian tax math for invoices, vendor payments, and quick estimates. Default GST is 18%, with inclusive and exclusive calculations available instantly.
Auto calculation
No submit button. Edit any value and results update.
GST split
Switch between CGST + SGST and IGST views.
TDS gross-up
Calculate deduction or reverse from target net payout.
GST Calculator
Default rate is 18%. Enter either the total including GST or the taxable value before GST and the other side updates in the result instantly.
Taxable value
INR 1,000.00
GST amount
INR 180.00
Invoice total
INR 1,180.00
CGST + SGST split
INR 90.00 + INR 90.00
Formula: Taxable value = total including GST x 100 / (100 + rate)
Use CGST + SGST for intra-state invoices and IGST for inter-state invoices.
TDS Calculator
Enter the payment and rate. The calculator updates instantly and also supports gross-up when you need to work backwards from a target net amount.
Taxable value
INR 50,000.00
GST shown separately (18.00%)
INR 9,000.00
Invoice total
INR 59,000.00
TDS base, GST excluded
INR 50,000.00
TDS amount
INR 5,000.00
Net payable after TDS
INR 54,000.00
Applied rate
10.00%
Formula: Taxable value = invoice total / (1 + GST rate), then TDS = taxable value x TDS rate
CBDT Circular No. 23/2017 says GST on services is excluded from TDS when the GST component is indicated separately. If GST is not shown separately, use the full payment amount as the TDS base.
Quick note
These calculators are for quick estimates. GST classification, exemptions, reverse charge, TDS sections, thresholds, surcharge, cess, and compliance treatment can vary by transaction and financial year.
