What Is GST?
GST (Goods and Services Tax) is India’s unified indirect tax system introduced in July 2017. It replaced multiple taxes like VAT, excise duty, and service tax with one streamlined tax regime. GST follows a destination-based model, applies to the supply of goods and services at every stage, and allows input tax credit, eliminating the old tax-on-tax effect.
Why You Need a GST Calculator
A GST calculator makes life easier for businesses, freelancers, and taxpayers by giving instant, accurate GST calculations.
It helps you:
Save time with automatic GST computation
Avoid manual mistakes
Calculate GST-inclusive or GST-exclusive prices
Generate accurate invoices and stay compliant
File GST returns without errors
In short—no guesswork, no confusion.
How to Calculate GST Using BizPillar’s GST Calculator
Select GST Type → GST-Inclusive or GST-Exclusive
Enter Original Amount → The base cost of your goods/services
Choose GST Rate → 5%, 12%, 18%, or 28%
Click Calculate → Instantly view GST amount + total payable
Fast, simple, accurate.
GST Calculation Formula
GST-Inclusive Price
Total Price = Original Cost + (Original Cost × GST%)
GST-Exclusive Price
Total Price = Original Cost ÷ (1 – GST%)
The calculator uses these formulas automatically—just enter values and get the results.
GST Tax Slabs in India
0% - Essential goods like fresh produce.
5% - Mass-consumption items and select services.
12% - Standard goods and services.
18% - Most products and services (electronics, cosmetics, etc.).
28% - Luxury and sin goods—cars, tobacco, etc.
Understanding CGST, SGST & IGST
CGST → Central Government tax (intra-state sales)
SGST → State Government tax (intra-state sales)
IGST → Central Government tax (inter-state sales)
BizPillar’s calculator breaks your GST amount into these components wherever needed.
Benefits of Using a GST Calculator
1. Accurate GST Computation
Avoid miscalculations in invoices, tax returns, or product pricing.
2. Saves Time
No manual formulas—just instant results.
3. Helps Financial Planning
Accurate GST helps with clean bookkeeping, invoicing, and filing.
4. Calculates GST Interest for Delays
Plan penalties in advance using a GST late-payment interest calculator.
GST Late Payment Interest & Penalties
Interest on Late GST Payment
Rate: 18% per annum
Formula:
Interest = Tax Amount × Interest Rate × (Days Delayed / 365)
Late Fee Penalties
₹25 per day for CGST
₹25 per day for SGST
Penalty capped per return to avoid excessive charges
A GST interest calculator makes these calculations effortless.