Finance & MoneyCommerce
Sales Tax & GST Calculation Tool
Instantly compute sales tax, GST, and VAT. Supports both adding tax to net amounts and reverse tax deduction from gross retail receipts.
Tax & GST Calculator
18%
Final Total (Gross Price)
$1,180.00
Calculated at 18% exclusive tax
Net Base Price:$1,000.00
Total Tax Component (18%):+$180.00
Grand Invoice Total:$1,180.00
Mathematical Formula: Tax Inclusive & Exclusive Formula
Exclusive: Total = Net × (1 + Rate) | Inclusive: Net = Total / (1 + Rate)
Calculates tax amount and net base from given tax percentage.
How to Use This Calculator
- 1Enter the price/amount.
- 2Specify the tax percentage rate (e.g. 5%, 12%, 18%, 28% for Indian GST or US state sales tax rates).
- 3Select Tax Exclusive (Add tax to net price) or Tax Inclusive (Extract tax from gross price).
- 4View net price, tax amount, and state/central tax split.
Practical Example: 18% GST on ₹10,000 Item
Scenario: Calculating 18% GST (Tax Exclusive) on a ₹10,000 product.
Net Amount:₹10,000.00
Tax Rate:18.0%
Mode:Tax Exclusive
Result: Tax Amount: ₹1,800.00 (CGST: ₹900, SGST: ₹900) | Total Amount: ₹11,800.00
₹10,000 × 0.18 = ₹1,800 total tax added to create final invoice amount.
Frequently Asked Questions
GST exclusive means the price shown does not include tax yet (tax will be added on top). GST inclusive means the price shown already contains the tax component.
Pro Calculation Tips
- Use Tax Inclusive mode to quickly find how much actual tax was embedded in an all-inclusive receipt.
Model Assumptions
- Does not evaluate regional item-specific tax exemptions or zero-rated goods.