GST Calculator
CGST + SGST / UTGST — India
Original Amount
Base value before GST
₹0.00
CGST @ 9%
Central Goods & Services Tax
₹0.00
SGST / UTGST @ 9%
State / Union Territory GST
₹0.00
Total GST
CGST + SGST (18%)
₹0.00
Total Payable
Amount + all taxes
₹0.00
For intra-state transactions. For inter-state, IGST applies (full rate).
This tool is for reference only — verify with a CA for compliance.
Technical Specification
GST Computation Engine & Tax Breakdown Generator
Overview
The ToolsForges GST calculator computes Goods and Services Tax amounts, inclusive and exclusive tax prices, and inter-state versus intra-state tax splits entirely within the browser. Enter the base amount and applicable GST slab percentage to receive an instantaneous breakdown of CGST, SGST, and IGST components. The calculator supports India's multi-tier GST structure with slabs at five, twelve, eighteen, and twenty-eight percent, as well as custom rates for specialized goods and services. All computations execute client-side, ensuring that your pricing data and financial figures remain private.
Feature Specifications
- CGST and SGST SplitFor intra-state transactions, the calculator automatically splits the total GST equally between Central GST and State GST components, matching the format required on Indian tax invoices.
- IGST ComputationFor inter-state transactions, compute the full IGST amount in a single field, reflecting the integrated tax structure applicable to cross-border supply within India.
- Inclusive and Exclusive ModesCalculate GST on top of a base price or extract the base price from a GST-inclusive figure. Both directions provide complete breakdowns for accurate invoicing.
- Custom Slab SupportBeyond the standard four slabs, enter any custom percentage for specialized goods, exempt categories, or zero-rated exports that fall outside the standard GST tiers.
Architecture
The calculator uses React state for input management and pure arithmetic for tax computation. The output panel renders all tax components simultaneously in a clean grid layout that adapts to mobile screens.
Frequently Asked Questions
What are the current GST slabs in India?
India's GST structure includes four primary slabs: five percent, twelve percent, eighteen percent, and twenty-eight percent. Certain essential items are zero-rated or fully exempt from GST.
When should I use IGST instead of CGST plus SGST?
Use IGST for inter-state transactions where the supplier and recipient are in different states. Use CGST plus SGST for intra-state transactions within the same state.
Can I calculate GST for reverse charge mechanism?
The calculator computes the tax amount regardless of who is liable to pay. Enter the applicable rate and amount, then apply the reverse charge label on your invoice as required.
Is my pricing data stored?
No. All amounts and tax computations are processed in-memory within your browser. No pricing data, business information, or financial figures are transmitted or stored externally.