Results are estimates for illustration only and not financial, tax, or investment advice. Verify with a qualified, registered advisor before making decisions.
GST Calculator
Last updated
Since GST 2.0 took effect on 22 September 2025, India's main GST slabs are 5% and 18%, plus a 40% rate on luxury and sin goods; the 12% slab is gone and 28% remains only for some tobacco products. Exclusive tax = Amount × Rate / 100. Inclusive tax = Amount − Amount × 100 / (100 + Rate).
Instant GST calculation for inclusive and exclusive amounts.
Runs in your browser
Your files and text are processed locally in your browser and are not uploaded.
How Does India Goods and Services Tax (GST) Work?
Note on 2025 GST Slabs: Following GST reforms notified by CBIC and the GST Council in September 2025, the previous 12% and 28% slabs were merged into a simplified two-rate system of 5% and 18%, alongside a 40% rate on luxury and demerit items. For service-specific rates, SAC codes, and hotel slabs, see our guide on GST on Services in India: Rates & Billing Guide.
Worked Example: For an item priced at ₹1,00,000 at a standard GST rate of 18%:
- Exclusive calculation (tax added): Net price is ₹1,00,000. Total GST is ₹18,000 (split into CGST ₹9,000 and SGST ₹9,000). Gross price is ₹1,18,000.
- Inclusive calculation (tax removed): Total inclusive price is ₹1,00,000. Net price is ₹84,746. Total GST portion is ₹15,254 (split into CGST ₹7,627 and SGST ₹7,627).
A GST Calculator determines the tax amount and total price of a product or service. To add tax: New Price = Base Price + (Base Price x GST%). To remove tax (inclusive pricing): Base Price = Total Price / (1 + GST%), with the GST amount being the difference between total and base prices.
Definition: Goods and Services Tax (GST)
An indirect tax levied on the supply of goods and services in India. It is a comprehensive, multi-stage, destination-based tax that replaced multiple indirect taxes such as excise duty, service tax, VAT, and entry tax, unifying the tax structure under one national system.
What GST Inputs and Tax Breakdown Outputs Are Provided?
Required Inputs
- Base Amount / Cost of GoodsThe initial price of the goods or services before tax, or the total inclusive price (depending on calculation type).
- GST Rate (%)The applicable tax slab percentage (commonly 5%, 18%, or 40% in India, or custom rate).
- Calculation TypeChoose 'Add GST' for tax-exclusive calculations, or 'Remove GST' for tax-inclusive pricing.
Expected Outputs
- Net Amount (Base Price)The cost of the goods/services exclusive of GST.
- Total GST AmountThe total tax calculated on the transaction.
- CGST & SGST SplitA 50:50 distribution of the GST amount, applicable for intra-state sales.
- IGST AmountThe full GST amount, applicable for inter-state transactions.
- Gross AmountThe total final price including GST (Base Price + GST).
Who Uses the GST Calculator?
Invoice Creation
Quickly determine the exact tax components required to create compliant invoices for retail or B2B sales.
Purchase Decision Assessment
Calculate how much tax you are paying on inclusive retail items to find the actual base price.
Input Tax Credit (ITC) Planning
Determine the taxable value and credit eligibility for business expense reports.
Accounting & Auditing
Reconcile transaction ledger entries by validating calculated tax portions against bank records.
How Do You Calculate Inclusive and Exclusive GST?
- 1Enter the starting monetary amount in the principal input field.
- 2Select the target GST rate slab (5%, 18%, 40%, or enter a custom rate).
- 3Choose whether to Add GST (exclusive) or Remove GST (inclusive).
- 4Observe the detailed split between CGST, SGST, IGST, and final values instantly.
GST Tax Slab Rates and Calculation Rules
Privacy & Security Guarantee
All tax and cost figures are processed within your local browser runtime environment. Your business details are never transmitted over the internet.
Frequently Asked Questions
What are CGST, SGST, and IGST?
CGST (Central GST) and SGST (State GST) are levied on intra-state supplies (within the same state) and are split equally (50% each). IGST (Integrated GST) is levied on inter-state supplies (across state borders) and goes to the Central Government.
How do I calculate GST inclusive price?
To find the base price of an item that already includes GST, use the formula: Base Price = Inclusive Price / (1 + GST Rate / 100). The GST amount is then: Inclusive Price - Base Price.
What is the standard GST rate for services in India?
Most professional and IT services fall under the standard 18% GST slab, while certain essential services fall under 5%.
Does this tool support custom GST percentages?
Yes, while the tool provides quick buttons for standard Indian slabs (5%, 18%, 40%), you can input any custom decimal tax percentage required.
Who is liable to pay GST in India?
Registered businesses whose annual turnover exceeds Rs. 40 Lakhs (for goods) or Rs. 20 Lakhs (for services), and those involved in inter-state trade, are generally required to register and pay GST.
Is there a penalty for incorrect GST calculations on invoices?
Yes, filing incorrect tax amounts or emitting incorrect invoices can lead to interest penalties, audit flags, or loss of Input Tax Credit (ITC) for your buyers.