GST Calculator
Add GST to a base amount or extract it from an inclusive total. Works for all four GST slabs and shows the CGST/SGST split used in intra-state invoices.
₹10,000.00
Total Amount
₹11,800
at 18% GST
GST Amount
₹1,800
18% of base amount
CGST + SGST
₹900+₹900
₹900 each (intra-state)
GST Breakdown
How the total splits between base amount and GST.
How does 18% GST compare?
Same base amount under each slab.
GST Rate Reference
What's taxed at each rate?
- 5%
Essential goods
Food grains, edible oil, sugar, tea, coffee
- 12%
Standard goods
Processed food, computers, phones under ₹12K
- 18%
Most services
Restaurants, telecom, banking, most services
- 28%
Luxury goods
Cars, tobacco, luxury hotels, aerated drinks
Financial Intelligence
PreviewCurated Strategy Templates
AI Insight
Your calculations provide a clear outline of your current financial obligations and potential growth structures.
What This Means
Understanding numerical trade-offs allows you to plan cash flow and avoid high-cost debt or tax leakage.
Action Plan
- ✓Align this calculation with your overall monthly budget parameters.
- ✓Consult a financial planner before committing large lump-sum capital to long-term lock-in products.
- ✓Review interest rate spreads and tax implications periodically.
Suggested Next Step
Consult Financial Intelligence Hub →GST Calculator
GST calculator India: A product with a base price of ₹1,000 attracts ₹180 in tax at an 18% GST rate, making the total ₹1,180. To extract GST from ₹1,180, divide by 1.18 to find the ₹1,000 base.
What Is GST Calculator?
Restaurant bills in India are a common source of confusion — is the 18% GST applied on the base price or the price already shown on the menu? If you've ever wondered whether you were being overcharged, this calculator gives you the exact answer in under 3 seconds.
How GST Calculator Is Calculated
- Add GST: Final Price = Base Price + (Base Price x GST% / 100)
- Remove GST: Base Price = Total Price / (1 + GST% / 100)
Worked Example:
1. Adding 18% GST to a ₹1,000 item:
- GST Amount = 1,000 x 0.18 = ₹180
- Final Price = ₹1,180
- Base Price = 1,180 / 1.18 = ₹1,000
- GST Extracted = ₹180
Key Factors That Affect Your Result
- GST Slabs: India uses 5%, 12%, 18%, and 28% slabs. Incorrect slab selection is the most common error in manual billing.
- Intra-state vs Inter-state: For sales within a state, GST is split into CGST and SGST (9% + 9%). For sales between states, a single 18% IGST is charged.
- Input Tax Credit: Businesses can claim back the GST they paid on purchases, making the 'Net GST' liability lower.
GST Calculator in the Indian Context
The GST Act requires every registered business with a turnover above ₹40 Lakhs (for goods) or ₹20 Lakhs (for services) to file regular returns. Calculating the split between CGST (Central) and SGST (State) is mandatory for all local invoices in India.
Consumers should always check if the GST number (GSTIN) on their bill is valid to ensure the tax they paid is actually reaching the government. Many small retailers in India incorrectly add GST to MRP-labeled products, which is illegal.
Practical Tip
If you are a freelancer or consultant charging ₹50,000, remember that you must add 18% GST (₹9,000) on top, otherwise, you will lose ₹7,627 of your profit to tax when filing.
What most Indians miss: Consumers should always check if the GST rate on a restaurant bill matches the AC/Non-AC status and the type of food served. Also, small business owners often miss that if they opt for the Composition Scheme, they cannot collect GST from customers or claim Input Tax Credit.
Sources
- Income Tax Act, 1961 — [incometax.gov.in](https://incometax.gov.in)
- GST Council of India — [gst.gov.in](https://www.gst.gov.in)
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GST FAQ
GST — Common Questions
To extract the base price from a GST-inclusive amount, use the reverse formula: Base Price = Total Amount × [100 / (100 + GST Rate)]. For example, if you bought a laptop for ₹59,000 (inclusive of 18% GST), the base price is ₹59,000 × (100 / 118) = ₹50,000. The GST paid is the difference: ₹9,000.
To calculate the final selling price including GST, use the formula: Final Price = Base Price + (Base Price × GST Rate / 100). For example, if you provide consulting services worth ₹20,000 and the applicable GST is 18%, the tax is ₹20,000 × 0.18 = ₹3,600. The final invoice amount to your client will be ₹23,600.
CGST (Central GST) and SGST (State GST) are applied on intra-state sales (within the same state) and the tax is split equally. For an 18% GST item sold within Maharashtra, 9% goes to CGST and 9% to SGST. IGST (Integrated GST) is applied on inter-state sales (between two different states) as a single flat rate, so the entire 18% is charged as IGST.
India primarily uses a four-tier GST structure: 5% (essential goods like packaged food and footwear below ₹1000), 12% (apparel above ₹1000, cell phones), 18% (most services, laptops, financial services), and 28% (luxury items, automobiles, tobacco). There are also special rates, like 3% for gold and 0.25% for rough diamonds.
The Composition Scheme is a simplified tax system for small businesses with an annual turnover up to ₹1.5 Crore. Instead of charging regular GST to customers and claiming Input Tax Credit, these businesses pay a flat 1% (for manufacturers), 5% (for restaurants), or 6% (for service providers) directly from their own pocket. They cannot issue a standard Tax Invoice.
Input Tax Credit prevents the cascading 'tax on tax' effect. If a manufacturer buys raw materials for ₹10,000 + ₹1,800 GST, they can claim the ₹1,800 as ITC. If they sell the finished product for ₹15,000 + ₹2,700 GST, they only deposit the net difference (₹2,700 - ₹1,800 = ₹900) to the government.
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