Question 1

How do I calculate GST inclusive amount?

Accepted Answer

GST inclusive amount = Base price × (1 + GST rate). To extract GST from an inclusive price, divide by (1 + rate) — e.g. ₹1,180 at 18% gives a base of ₹1,000 and GST of ₹180.

Question 2

How do I remove GST from a total amount?

Accepted Answer

Divide the inclusive total by (1 + GST rate). ₹1,180 ÷ 1.18 = ₹1,000 taxable value and ₹180 GST. Use the GST Inclusive Calculator above to extract base value and tax instantly.

Question 3

How is GST calculated on invoices?

Accepted Answer

Multiply the taxable amount by the GST rate. For ₹1,000 at 18% GST: ₹1,000 × 18% = ₹180 GST, making the final invoice ₹1,180. Use the GST Exclusive Calculator above for a complete breakdown with CGST/SGST or IGST.

Question 4

What is the difference between CGST, SGST and IGST?

Accepted Answer

For supplies within the same state (intra-state), GST is split equally into CGST (Centre) and SGST (State) — e.g. 18% = 9% CGST + 9% SGST. For supplies to another state (inter-state) and imports, the full rate is charged as IGST and collected by the Centre.

Question 5

Which GST rate should I use in India?

Accepted Answer

Most goods and services fall under 18% GST. The 5% rate applies to essentials and select services. A 40% rate applies to specified demerit and luxury goods. Always confirm the rate from your invoice or HSN/SAC code.

Question 6

Can I use this GST calculator for GST billing?

Accepted Answer

Yes. The calculator gives accurate CGST, SGST, IGST and final invoice values for B2B and B2C billing. For full invoice generation, GSTR filing and ITC reconciliation, our GST plans start at ₹499/month.

Question 7

What happens if GST returns are filed late?

Accepted Answer

Late fee is ₹50/day (₹20/day for nil returns), capped at ₹10,000 per return, plus 18% annual interest on tax payable. We file on time and reconcile ITC to avoid penalties.

Question 8

Can businesses claim GST input tax credit (ITC)?

Accepted Answer

Yes — registered businesses can claim ITC on inputs used for taxable supplies, provided the supplier has filed GSTR-1 and the invoice appears in your GSTR-2B.

Question 9

Which GST return forms need to be filed?

Accepted Answer

Most businesses file GSTR-1 (sales) and GSTR-3B (summary) monthly or quarterly under QRMP, plus GSTR-9 annually. Composition dealers file CMP-08 quarterly and GSTR-4 annually.

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