GST Calculator

A shop bill, a freelancer invoice and a quote need two sums. Add GST starts from the taxable value and builds the tax and the total the customer pays. Remove GST starts from a total that already includes tax and works back to the taxable value. This page does that sum for one line, or for up to ten lines with different rates.

The chips follow Notification No. 9/2025-Central Tax (Rate) and Notification No. 9/2025-Integrated Tax (Rate), dated 17 September 2025 and effective 22 September 2025. The central-tax notification replaced Notification No. 1/2017-Central Tax (Rate). Its CGST halves are 2.5, 9, 20, 1.5, 0.125, 0.75 and 14 percent, so the full rates are 5, 18, 40, 3, 0.25, 1.5 and 28 percent. The integrated-tax notification sets those rates as IGST. The 56th GST Council meeting is the source. The FAQ, the PIB note and both notifications are under Official sources.

5%, 18% and 40% are the main chips. 0.25%, 1.5%, 3% and 28% stay because those slabs are still notified. 0% is for a nil or exempt supply you already know is at nil. Notification 9/2025 has no zero schedule. The custom box takes 0 to 100 with up to three decimal places. Services use their own notifications.

28% is Schedule VII and 40% is Schedule III. Some goods, including certain tobacco items, can stay on an earlier GST rate plus compensation cess until a later notification. This calculator does not add cess, and it has no product or HSN map. Read the rate on the invoice or in the schedule, then tap or type it. Do not guess from the name of the goods.

Intra-state means CGST plus SGST, each half the rate. Inter-state means one IGST figure at the full rate. Extra lines share that mode and supply type, with their own rate and an optional description. The taxable value, GST and grand total are the sum of the lines. Copy summary is plain text. Download CSV is one row per line plus a total row.

The amount, the rate and any line description stay in this browser tab. They are not sent to TaskNinja, saved, or written into analytics. Counted events are anonymous, such as the calculator being opened or a file being downloaded. Rupee figures are not part of those events.

The result is arithmetic, not a ruling. The page does not check exemptions, place an HSN in a schedule, or apply composition, reverse charge or cess. Section 170 of the CGST Act lets invoice tax be rounded to the nearest rupee. Here each figure is rounded to the nearest paise. CGST and SGST are rounded separately, so they can differ by one paise from IGST. On Remove GST, GST is the remainder after the taxable value is rounded, so the two add back to the amount you typed. An odd leftover paise is placed on CGST.