TrulyInvoice

GST Calculator Online (FY 2026-27)

Calculate GST in seconds. Inclusive, exclusive, CGST/SGST breakup.

💡

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Net Amount

₹0

GST Amount (18%)

₹0

Total Amount

₹0

CGST (9.00%)

Central GST

₹0

SGST (9.00%)

State GST

₹0

How to Calculate GST?

GST Exclusive

To calculate GST on a base price, use the formula:

GST Amount = (Base Price * GST %) / 100
Total Price = Base Price + GST Amount

GST Inclusive

To find the base price from a total amount:

GST Amount = Total - (Total / (1 + GST % / 100))
Net Price = Total - GST Amount

Why use the TrulyInvoice GST Calculator?

Our GST calculator is designed for speed and accuracy. Whether you are a business owner, a CA, or a consumer, this tool helps you break down your invoices into Base, CGST, and SGST components instantly.

  • Latest GST Rates (5%, 18%, 40%)
  • CGST & SGST Breakup Included
  • Mobile Friendly & Responsive
  • One-Click Result Copying
FREQUENTLY ASKED QUESTIONS

GST Calculator FAQs

Common questions about calculating inclusive, exclusive, and slab-rate GST.

GST Exclusive means the price stated does not include tax; GST is added on top (Base Amount + GST = Total). GST Inclusive means the quoted price already includes tax, so the base amount and GST are calculated backward (Base = Total / (1 + GST Rate/100)).

For sales within the same state (intrastate), the applicable GST rate is divided equally between Central GST (CGST) and State GST (SGST). For example, on an 18% GST item, 9% is CGST and 9% is SGST.

Integrated GST (IGST) is charged on interstate transactions—when goods or services are supplied from one state or union territory to another. The full tax rate (e.g. 18%) is levied as IGST.

In Tally Prime, select F9 (Purchase) or F8 (Sales). Choose the party ledger, item details, and then apply respective CGST/SGST or IGST duty ledgers under Duties & Taxes. TrulyInvoice can also automate this voucher entry directly from invoice PDFs.

More Resources for Accountants

How to Import Meesho Seller Sales Statements in TallyPrimeGSTR-2A Reconciliation Best Practices for Maximum ITC ClaimsGST on Hostels and PG Accommodations: Exemption Rules and RulingsDynamic QR Code on B2C GST Invoices: Rules and ApplicabilityPurchase Invoice Entry Automation
Ready to save time?

Stop Manual Voucher Entry.

TrulyInvoice automates your complete invoice workflow and syncs directly to Tally Prime.

No credit card · 14-day free trial

01

Upload Invoice

Drag & drop PDFs, scans, or photos.

02

AI Extraction

Line items, tax, and ledgers mapped.

03

1-Click Review

Verify extracted details on dashboard.

04

Direct Sync

Vouchers created instantly in Tally Prime.