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Effective Tax Rate Formula calculates the rate of average tax paid by the individual or corporation where effective tax rate of the individual is calculated by dividing total tax expense by the total taxable income during the period and the effective tax rate of the corporation is calculated by dividing total tax expense by the total earning before tax during the period.
Effective Tax Rate Formula (Table of Contents)
What is the Effective Tax Rate Formula?
The term “effective tax rate” refers to the average taxation rate for an individual or a corporation. The formula for the effective tax rate for an individual is calculated by dividing the total tax expense by the taxable income which is mathematically represented as,
On the other hand, the formula for the effective tax rate for a corporation is calculated by dividing the total tax expense by the earnings before tax (EBT) which is mathematically represented as,
Since EBT is effectively net income plus total tax expense and as such the above formula can be modified as,
Effective Tax rate _{Corporation} = Total tax expense / (Net income + Total tax expense)
Explanation of the Effective Tax Rate Formula
The formula for the effective tax rate for an individual can be derived by using the following steps:
Step 1: Firstly, determine the total expense of the individual from the income tax filing submitted.
Step 2: Next, determine the taxable income of the individual and it can be computed by subtracting total exemptions and total deductions from the gross total income of the individual.
Taxable income = Gross total income – Total exemptions – Total deductions
Step 3: Finally, the formula for the effective tax rate of the individual is calculated by dividing the total tax expense by the taxable income as shown above.
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The formula for the effective tax rate for a corporation can be derived by using the following steps:
Step 1: Firstly, determine the total expense of the corporation which will be easily available as a line item just above the net income in its income statement.
Step 2: Next, determine the net income of the corporation which will also be available as a line item in the income statement. The EBT can be calculated by adding the total tax expense to the net income.
EBT = Net income + Total tax expense
Step 3: Finally, the formula for the effective tax rate of the corporation is calculated by dividing the total tax expense by its EBT as shown above.
Tax rate _{Corporation} = Total tax expense / (Net income + Total tax expense)
Examples of Effective Tax Rate Formula (with Excel Template)
Let’s see some simple to advanced examples of Formula to understand it better.
Example #1
Let us determine the tax rate for an individual with taxable income of $600,000 under the following hypothetical progressive tax regime.
As per above table,
 Total tax expense = $100,000 * 10% + $200,000 * 15% + $200,000 * 25% + $100,000 * 35%
 = $125,000
Therefore, the calculation of this formula will be as follows
 Effective Tax Rate Formula = Total tax expense / Taxable income
 = $125,000 / $600,000
 Tax Rate = 20.83%
Example #2
Let us take the example of John to understand the calculation for the effective tax rate. John joined a bank recently where he earns a gross salary of $200,000 annually. While filing for his income tax returns his accountant informed him that he is eligible for tax exemption worth $20,000 and deductions worth of $25,000. Calculate the tax rate if his total income tax payable as per IT filing is $45,000.
Use the following data for the calculation of the Effective Tax Rate Formula.
Taxable income
 Taxable income = Gross salary – Deductions – Tax exemptions
 = $200,000 – $25,000 – $20,000
 = $155,000
Therefore, the calculation of tax rate is as follows,
 Tax Rate = $45,000 / $155,000
Tax Rate will be –
 Tax Rate = 29.03%
Therefore, the tax rate for John is 29.03%.
Example #3
Let us take the reallife example of Apple Inc.’s annual report as on Sep 24, 2016, Sep 30, 2017, and September 29, 2018. The following information is available.
For the calculation of Effective Tax Rate, we will first calculate the EBT as follows –
EBT for Sep 24, 2016
 EBT = Net income + Total tax expense
 =$45,687 + $15,685
 =$61,372
Similarly, we will calculate the EBT for 2017 and 2018.
After calculating EBT, we will do the calculation of Effective Tax Rate as Follows –
Calculation of Effective Tax Rate for Sep 24, 2016, will be as follows –
Tax Rate for Sep 24, 2016, will be –
 = $15,685 Mn / $61,372 Mn
 = 25.56%
Similarly, we will calculate the Tax Rate for 2017 and 2018.
Calculator
You can use the following calculator.
Total Tax Expense  
Taxable Income  
Effective Tax Rate Formula  
Effective Tax Rate Formula = 


Relevance and Use
It is very important to understand the concept of effective tax rate because it is one metric that can be used by the investors as a profitability indicator of a company. However, the rate may fluctuate dramatically from year to year due to the taxable income falling into different tax slabs in a progressive tax regime. Otherwise, it is difficult to straightaway assess the reason behind a sudden jump or drop in the tax rate. For example, the change in the tax rate may be due to asset accounting manipulation by the company intended to reduce the tax burden. Nevertheless, the tax rate is a good indicator of the tax burden imposed by the government.
Recommended Articles
This has been a guide to Effective Tax Rate Formula. Here we discuss how to calculate Effective Tax Rate for the Individuals and the Corporation along with the practical examples and downloadable excel sheet. You can learn more about accounting from the following articles –