 # How to calculate IGV? - IGV Peru Calculator

The calculation of IGV or General Sales Tax is made by applying 18% in case of having the base amount, for example:

IGV = Base Amount x 0.18

In case of knowing the total amount, that is, including VAT, then the calculation would be as follows:

First we get the base amount as follows:

Base Amount = Total Amount / (1 + 0.18) or Base Amount = Total Amount / 1.18

Finally, subtracting the total amount minus the base amount gives us the IGV:

IGV = Total Amount – Base Amount

The result shows both options. One in case of knowing the Base Amount, the other in case of having the Total Amount and you want to know what the Base Amount is.

Base Amount + IGV = Total Amount

Base Amount - option 1
S/.
Total amount - option 2
S/.
IGV in %
%
Result of option 1: When the Base amount of the invoice is entered and you want to know the Total Amount

Result of option 2: When the Total amount of the invoice is entered and you want to know the Base Amount
By: Joseph Angersoen
5 de September de 2022
Categories:
Tags: With more than 20 years of experience working in technology, web design and development, marketing and data analysis. We offer solutions to the challenges of today's competitiveness in an increasingly digitized world.

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