GST has three components: CGST (Central GST) goes to the central government, SGST (State GST) goes to the state government, and IGST (Integrated GST) applies to inter-state transactions. For intra-state sales, CGST and SGST are split equally; for inter-state sales, only IGST applies at the full rate.

To find the base price from a GST-inclusive amount, use: Base Price = Total Amount / (1 + GST Rate/100). For example, if ₹11,800 includes 18% GST, the base price is ₹11,800 / 1.18 = ₹10,000, and GST is ₹1,800.

GST rates in India are 0%, 0.25%, 3%, 5%, 12%, 18%, and 28%. Essential goods are at 0-5%, standard goods/services at 12-18%, and luxury items at 28%. Use our HSN/SAC Finder tool to look up the exact rate for your item.

Yes, our calculator reflects the standard GST slab rates as per the latest GST Council circulars and Finance Act 2026. However, some products may have special rates or exemptions that are not covered by this general calculator. Always verify with the GST Portal.

Yes! The total GST amount shown in the results is the same whether it's split between CGST+SGST (intra-state) or charged as IGST (inter-state). The tax amount remains the same; only the split changes in your invoice.

HSN stands for Harmonized System of Nomenclature. It is an internationally standardized system of codes (6-8 digits) used to classify traded products. Under GST, HSN codes are used on invoices to identify the applicable tax rate for goods.

SAC stands for Services Accounting Code. It is a classification system specifically for services under GST in India. SAC codes are typically 6 digits and are required on invoices for service providers.

Yes, for businesses with annual turnover above ₹5 Crore, a 4-digit HSN code is mandatory. For turnover above ₹5 Crore, 6-digit codes are required. Businesses below ₹5 Crore may optionally include 4-digit codes. Always check the latest CBIC notification for updated thresholds.

Use our search tool above — type a keyword describing your product (e.g., "cotton shirts", "mobile phones", "medicines"). You can also search by numerical code if you have a partial code. For complex or ambiguous items, consult a CA or check the CBIC HSN database.

Our Invoice Generator creates invoices with all mandatory fields required by GST laws (Rule 46, CGST Rules 2017), including GSTIN, HSN codes, and CGST/SGST breakup. However, for official tax filing purposes, we recommend using this as a reference and verifying compliance with your Chartered Accountant.

The current version generates a standard format invoice. For branded invoices with your logo, GSTIN, and company address, we recommend exporting the invoice and customizing it in a word processor, or using dedicated accounting software like Tally or Zoho Invoice.

As per Section 31 of the CGST Act, 2017, a tax invoice must include: Invoice number, date, supplier name/address/GSTIN, recipient details, HSN/SAC code, description of goods/services, quantity, value, taxable value, rate and amount of tax (CGST/SGST/IGST), and total value.

No. All invoice data is processed entirely in your browser using client-side JavaScript. Nothing is uploaded to our servers. Once you close or refresh the page, the data is gone. We recommend downloading/printing immediately after generation.

Under normal GST, the supplier collects and pays tax. Under RCM (Section 9(3) and 9(4) of CGST Act), the recipient is liable to pay GST directly to the government. This applies to specific goods/services notified by the government and purchases from unregistered dealers.

Yes! GST paid under Reverse Charge Mechanism is eligible for Input Tax Credit (ITC) under Section 16 of the CGST Act. You can claim this credit in the same month's GSTR-3B return, provided you have a valid tax invoice and have paid the tax.

Key services notified under RCM include: Legal services by advocates, GTA (Goods Transport Agency) services, services by insurance agents, import of services, security services by individuals, director services (not as employee), and sponsorship services.

Yes. When you pay GST under RCM on purchases from unregistered dealers, you must issue a self-invoice (payment voucher) with your own GSTIN as both supplier and recipient details. This is mandatory for claiming ITC and for GSTR-1 reporting.

GSTR-1 is a monthly/quarterly return for reporting outward supplies (sales). Monthly filers must submit by the 11th of the following month. Quarterly filers (under QRMP scheme) file by the 13th of the month following the quarter. It includes B2B invoices, B2C (large) invoices, credit/debit notes, and export details.

GSTR-3B is a summary return for declaring tax liability and claiming Input Tax Credit (ITC). Unlike GSTR-1 (which details individual invoices), GSTR-3B shows aggregate figures. It's due by the 20th of the following month. Tax payment must be made before filing GSTR-3B.

Late filing penalties under GST: ₹50/day (₹25 CGST + ₹25 SGST) for regular returns, and ₹20/day for nil returns. Maximum penalty is capped at ₹10,000 per return. Additionally, interest at 18% p.a. is charged on outstanding tax from the due date until payment.

QRMP (Quarterly Return Monthly Payment) is for taxpayers with annual turnover up to ₹5 Crore. Under this scheme, you file GSTR-1 and GSTR-3B quarterly but pay tax monthly using either the fixed sum method (35% of previous quarter's tax) or self-assessment method via PMT-06 challan. Auto-generated GSTR-2B is available monthly for ITC tracking.