How to calculate price before 9% GST?

Asked by: Margarett Hauck Sr.  |  Last update: August 16, 2026
Score: 4.8/5 (52 votes)

To calculate the price before 9% GST, divide the total inclusive price by 1.09 1 . 0 9 (i.e., Price ÷ 1.09 P r i c e ÷ 1 . 0 9 ). For example, if an item costs $ 109 $ 1 0 9 inclusive of GST, the calculation is 109 ÷ 1.09 = $ 100 1 0 9 ÷ 1 . 0 9 = $ 1 0 0 .

How to find original price before GST?

For example, if the cost of a product after GST of 18% is Rs. 118, its original cost is 118 – [100/(100 + 18%)}], which equates to Rs. 100.

How to calculate price before GST?

To calculate how much GST is included in a price, just divide by 11. To calculate how much the price was before GST, just divide by 1.1.

How to calculate price with 9% GST?

GST (9%): Multiply your bill by 1.09. Service Charge (10%): Multiply your bill by 1.10. Both GST and Service Charge: Multiply your bill by 1.199.

How to calculate the original price before tax?

To calculate the price before tax (reverse sales tax), divide the total price by (1 + the tax rate as a decimal); for example, if the total is $107 and the tax rate is 7% (0.07), you'd calculate $107 / 1.07 to get the $100 pre-tax price. 

How to Find Actual Price Before GST - Goods and Services Tax

21 related questions found

How to calculate GST in reverse?

Reverse Charge Mechanism & Calculation

  1. Formula: Base Amount = Inclusive Amount ÷ (1 + GST Rate/100)
  2. RCM: Recipient pays GST instead of supplier.
  3. Split: For intra-state: CGST + SGST | For inter-state: IGST. Our reverse GST calculator automatically handles RCM compliance calculations.

How to remove 9% GST?

Here's the example:

  1. If $100 is the GST exclusive value. $100 * 0.09 = $9 GST amount.
  2. To get the GST inclusive amount, multiply the GST exclusive value by 1.09. ...
  3. To extract the GST part from a GST inclusive amount, divide the GST inclusive amount by 109 and multiply by 9.

How do you calculate reverse tax?

Formula Behind Financial Sales Tax Reverse Calculator

The formula is: Base Price = Total Price / (1 + (Tax Rate ÷ 100)). Total Price is the tax-inclusive amount; Tax Rate is the applicable percentage. This calculation instantly gives you both the pre-tax price and the actual tax paid.

How to calculate 9% GST in Excel?

How do I calculate GST in Excel? Use Price * (GST Rate / 100) to calculate the GST amount.

How to calculate price before sale?

To find the original price from a sale price, divide the sale price by the percentage you paid (100% minus the discount percentage), expressed as a decimal; for example, for a 20% discount, you paid 80% (or 0.80), so you divide the sale price by 0.80 to get the original price.

How to calculate GST before tax?

How does the GST calculator work? The GST Calculator operates based on a straightforward formula: GST Amount = (Selling Price x GST Rate) / 100. Here, the Selling Price is determined by adding the Cost Price and Profit Amount.

Why do we divide by 11 for GST?

The value of a taxable supply is the consideration payable for the supply (before GST is added). For example, if the value of the supply is $100, the GST payable is 10 percent of $100, being $10. The price GST inclusive of the supply is $110. To work out the GST paid, you can divide by 11.

How to calculate a price before GST?

To work out how much GST is included in a total price, divide the price by 11. If you want the total price before GST was added, divide by 1.1.

How to do reverse calculation?

Finding the Reverse Percentage of a number in 3 easy steps.

Step 1) Get the percentage of the original number. If the percentage is an increase then add it to 100, if it is a decrease then subtract it from 100. Step 3) Find 100% of the original number by multiplying the result from Step 2) by 100.

How to find original price before tax in Excel?

Price Before Tax = Total Price / (1 + Sales Tax Rate)

Where Total Price is the cell with the price inclusive of tax, and Sales Tax Rate is the cell with the tax rate expressed as a decimal. In Excel, you would input these formulas into the cells where you want to display the tax amount and the price before tax.

How do you calculate base price before GST?

Firstly, divide the GST-inclusive price by (1 + (GST rate/100)) to determine the base price. Lastly, subtract this value from the total price. Yes, you can use the reverse GST calculator for all GST types—CGST, SGST, and IGST.

How to calculate GST backward?

You can quickly work out the cost of a product excluding GST by dividing the price of the product including GST by 11. This will give you the amount of GST applied to the product. You then multiply that figure by 10 to calculate the value of the product excluding GST.

How to figure out price before tax?

To calculate the price before tax (reverse sales tax), divide the total price by (1 + the tax rate as a decimal); for example, if the total is $107 and the tax rate is 7% (0.07), you'd calculate $107 / 1.07 to get the $100 pre-tax price. 

What is 9% GST in Singapore?

Prevailing GST rate

GST-registered businesses are required to charge and account for GST at 9% on all sales of goods and services in Singapore unless the sale can be zero-rated or exempted under the GST law.

What is a reverse GST calculator?

Reverse GST Calculator is a mathematical-based financial tool that determines the bill amount of goods and services, excluding tax. This tool helps in figuring out the pre-tax cost on the basis of the GST-inclusive amount and an applicable GST slab rate.

When did 9% GST start in Singapore?

GST rate change from 8% to 9% on 1 Jan 2024

For any standard-rated supplies of goods or services that you make on or after 1 Jan 2024, you must charge GST at 9%. For instance, if you issue an invoice and receive payments for your supply on or after 1 Jan 2024, you must account for GST at 9%.

How do you calculate reverse price?

Reverse Sales Tax Calculations:

  1. Price before Tax = Total Price with Tax - Sales Tax.
  2. Sales Tax Rate = Sales Tax Percent / 100.
  3. Price before Tax = Total Price with Tax / (1 + Sales Tax Rate)
  4. Sales Tax = Price before Tax x Sales Tax Rate.