Reverse Sales Tax Calculator
Find the original price before VAT/Sales Tax. Enter the final price you paid to calculate the base price and tax amount
Reverse Sales Tax Calculator
2025Find the original price before VAT/Sales Tax was added. Enter the final price to get base price.
How Reverse Calculation Works
When you know the final price (with tax included), this calculator helps you find the original price before tax was added.
Enter the price you paid (with VAT/Sales Tax included)
Reverse Calculation Results
📊 Price Breakdown
📝 Calculation Formula
Base Price = Final Price ÷ (1 + VAT Rate / 100)
Tax Amount = Final Price - Base Price
How Reverse Calculation Works
Forward Calculation
When you know the base price and want to find final price:
Formula: Final = Base × (1 + VAT/100)
Reverse Calculation
When you know the final price and want to find base price:
Formula: Base = Final ÷ (1 + VAT/100)
Common Use Cases
⛽ Fuel Pricing
When you paid ₹125/L for petrol and want to know how much was the base price before state VAT was added.
🍷 Liquor Analysis
Calculate the MRP before excise duty and VAT to understand the actual manufacturer's price of alcohol.
📊 Business Analysis
For accounting and cost analysis, find the pre-tax cost component of items purchased under state VAT.
Worked Examples
Example 1: Petrol in Maharashtra
Given:
- • Final Price Paid: ₹125.00
- • Maharashtra VAT: 25%
- • Need to find: Base Price
Calculation:
- Base = 125 ÷ (1 + 25/100)
- Base = 125 ÷ 1.25
- Base = ₹100.00
- VAT = ₹25.00
Example 2: Diesel in Andhra Pradesh
Given:
- • Final Price Paid: ₹107.30
- • Andhra Pradesh VAT: 23%
- • Need to find: Base Price
Calculation:
- Base = 107.30 ÷ (1 + 23/100)
- Base = 107.30 ÷ 1.23
- Base = ₹87.24
- VAT = ₹20.06
Example 3: Premium Liquor in Karnataka
Given:
- • Final MRP: ₹3,000
- • Karnataka VAT: 20%
- • Need to find: Pre-VAT price
Calculation:
- Base = 3000 ÷ (1 + 20/100)
- Base = 3000 ÷ 1.20
- Base = ₹2,500.00
- VAT = ₹500.00
Frequently Asked Questions
When would I need a reverse sales tax calculator?
Use this calculator when you have a final price (with tax included) and need to know the original price before tax. Common scenarios include analyzing fuel prices, comparing MRPs across states, accounting purposes, or understanding the tax component in your purchase.
Why is reverse calculation different from forward calculation?
In forward calculation, you multiply the base price by (1 + tax rate). In reverse calculation, you divide the final price by (1 + tax rate). This is because the tax is calculated on the base price, not on the final price. Simply subtracting the tax percentage from final price won't give correct results.
Does this work for GST as well?
Yes! The reverse calculation formula works for any type of sales tax including GST. However, most items in India are now under GST, not VAT. This calculator is primarily useful for petroleum products and alcohol which remain under state VAT.
Are there other taxes on petrol besides VAT?
Yes, petrol and diesel prices include multiple components: dealer price, central excise duty (fixed), state VAT (percentage-based), dealer commission, and sometimes additional cess. This calculator focuses on the VAT component. The actual price breakdown is more complex.