Turn a pre-GST hosting or cloud bill into the cash you actually pay: 18% GST plus card forex markup or bank charges on a dollar bill.
Enter the bill before GST in rupees, the GST rate (18% for hosting and IT infrastructure services; confirm your supply on the CBIC site) and any card forex markup or bank charges. The tool shows the GST and the total cash that leaves your account.
Worked example (illustrative). A cloud bill of $600 converted at an illustrative ₹88 per dollar = ₹52,800. GST at 18% = ₹9,504. The card adds an illustrative 3.5% forex markup = ₹1,848. Total cash outflow = ₹52,800 + ₹9,504 + ₹1,848 = ₹64,152.
Registered buyers of foreign services. When a GST-registered business buys from a supplier outside India, the invoice usually carries no Indian GST; you pay 18% IGST yourself under reverse charge and normally claim it back as input tax credit if conditions are met. The cash still goes out first, so this tool shows the peak outflow. An unregistered buyer is usually charged GST by the foreign supplier under the OIDAR rules.
As an FX buffer. Put the rupee value in the first field and 3–5% as the percentage to budget for exchange-rate movement before the card is charged.
Limits. The forex markup is often itself subject to GST, and card networks round differently. TDS may also be relevant. See GST, reverse charge and TDS on hosting and confirm with your CA.