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##### Asked by: Jalil Peramo

personal finance personal taxes# How do you calculate sales tax backwards?

Last Updated: 19th June, 2020

**How to Calculate Sales Tax Backwards From Total**

- Subtract the
**Tax**Paid From the Total. - Divide the
**Tax**Paid by the Pre-**Tax**Price. - Convert the
**Tax**Rate to a Percentage. - Add 100 Percent to the
**Tax**Rate. - Convert the Total Percentage to Decimal Form.
- Divide the Post-
**Tax**Price by the Decimal. - Subtract the Pre-
**Tax**Price FromPost-**Tax**Price.

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Accordingly, how do I calculate tax from a total?

Multiply the cost of an item or service by thesales**tax** in order to find out the **total** cost.The**equation** looks like this: Item or service cost xsales**tax** (in decimal form) = **total** sales **tax**.Addthe **total** sales **tax** to the Item or service costtoget your **total** cost.

Secondly, how do you find the original price before tax? **This calculation helps you to find the original priceaftera percentage decrease.**

- Subtract the discount from 100 to get the percentage oftheoriginal price.
- Multiply the final price by 100.
- Divide by the percentage in Step One.

Also to know, how do I calculate sales tax from gross?

Deducting **Sales Tax** to Find**GrossSales** To **figure** out the **gross** amount lessthe**sales tax**, divide the receipts by 1 plus the**salestax** rate. So, if the **sales tax** rate is 7percent, dividethe total amount of the receipts by1.07.

How do you add tax to a price?

Multiply by the **Tax** Rate Multiply the item's pre-**tax price** bythe**tax** rate, expressed as a decimal. So if the item inquestioncosts $25 and is taxed at a 7 percent rate, you have $25×0.07 = $1.75. This is the amount of **tax** to be addedto theitem's **price**.