Question 1

How do I add GST to a price?

Accepted Answer

Multiply the price by the GST rate and add it. ₹10,000 at 18% is ₹10,000 + ₹1,800 = ₹11,800.

Question 2

How do I remove GST from an inclusive amount?

Accepted Answer

Divide the amount by (100 + rate) and multiply by 100. ₹11,800 including 18% GST is ₹11,800 × 100 ÷ 118 = ₹10,000 before tax.

Question 3

When is it CGST + SGST and when IGST?

Accepted Answer

A sale within the same state carries CGST and SGST, each half of the rate. A sale to another state carries the full rate as IGST.

Question 4

What are the GST slabs now?

Accepted Answer

After the GST changes of September 2025 the main slabs are 5% and 18%, with 40% for a small list of luxury and sin goods. Some items are 0%, and gold and precious stones have special rates such as 3%.