How is the "Effective Tax Rate" given on the tax return printout in Turbotax calculated ?

[TurboLover2]

Desktop Deluxe 2025

When you print out your 2025 tax return with Turbotax there are some informational pages at the beginning of the document before the actual federal tax returns.  One of the things listed on these pages in the section called "2025 Federal Tax Return Summary" is called the "Effective Tax Rate."

The standard definition of effective tax rate is Total Tax divided by Taxable Income.  But when you make this calculation using the "Total Tax" and "Taxable Income" given in that same section, the result doesn't equal the result yielded by that standard definition of effective tax rate.

I've noticed this in previous years as well.

So what calculation is used to calculate the "Effective Tax Rate" given in this section?

[DavidD66]

TurboTax calculates the effective tax rate by dividing your total federal tax liability by your Adjusted Gross Income (AGI).  Total tax liability includes income tax, alternative minimum tax (AMT), and self-employment tax.  

[TurboLover2]

Thank you for your reply @DavidD66 .

However, I tried that calculation as well using the figures given in that section and it also did not match the number given for "Effective Tax Rate."  I tried every calculation I could think of but could not come up with the number given.

[CatinaT1]

The Blended tax rate is calculated under Federal / Federal Review.   
 

To access it, all questions must be answered in the Federal Review. 

At the end of the questions. Look at the bottom of the screen 

It will say Get a detailed view of your numbers.

The Blended Tax rate is: 

• Tax liability (Including SE tax, capital gain and special taxes), 
•  Divided by 
• Taxable income (Total income minus deductions, but before credits). 
• (All line numbers are on form 1040). 
   

The Effective Tax rate is your:

• Total income (line 9) 
• Deductions (Line 12) This is Itemized or Standard 
• Taxable Income (Line 9 – Line 12) 
• Blended Tax Rate (Tax Liability [below] / Taxable Income [above]) 
• Tax Liability (Line 16 + Line 23) 
• Taxes Paid (line 25d) 
  Credits (Line 21) 
  Total Tax Paid (Line 21 + Line 25d) 
  Refund/Due (Line 34 or Line 37) 

Effective tax rate doesn't consider SE tax and any penalties, and blended tax rate does. Blended tax rate is a confusing and unnecessary term to be using in TT, and gets everybody all upset. 

You can compute it yourself with a calculator.

Effective tax rate is something Turbo Tax uses to help you see where you stand; to see which W-2 may be deficient in withholding the correct amount of Federal tax, etc. 

It should be the tax divided by the total income, not the AGI. It is a number without any real value other than just to let you know when you earn $1, about x% is taxed.

For more effective information see: 

• TaxCaster tax calculator
• Tax bracket calculator

[TurboLover2]

Thank you for your reply @CatinaT1.

Thank you for pointing out that TT can provide other metrics that are useful such as Blended Tax Rate.

However, focusing specifically on the Effective Tax Rate as it is presented on the tax return printout rendered by TurboTax, it appears to be incorrect based on how I think we agree it should be calculated.

Here is what you said about that:

“Effective tax rate is something Turbo Tax uses to help you see where you stand; to see which W-2 may be deficient in withholding the correct amount of Federal tax, etc.

It should be the tax divided by the total income, not the AGI. It is a number without any real value other than just to let you know when you earn $1, about x% is taxed.“

I agree that the standard definition of Effective Tax Rate is the (total) tax divided by the total income. But as it appears on the TT printout I referred to in my original post, it does not equal the total tax divided by the total income.

It is labeled on the printout as “Effective Tax Rate” but it appears to be incorrect based how I think we both agree it should be calculated.  In my case the Effective Tax Rate TT shows in this section is about 1.7 percentage points lower than the Effective Tax Rate calculated as shown in the image.

So what I am seeking is how the Effective Tax Rate given in the section in the image is calculated since it does not seem to be calculated according to the standard definition of Effective Tax Rate or the way you and I apparently agree it should be calculated.  Is it a bug or is there some other explanation?  That's what I am trying to find out.

Please see the image of the TT printout below to clarify what I am saying.

[AmyC]

TurboTax uses total tax divided by total income simply to give you the big picture. As @CatinaT1 states above, the effective rate does not include everything. It isn't what you would use to actually compute your tax liability. It is just an informational number to help you plan. I agree with Catina that use the of the tax calculator is the better option.

If your rate is lower then TurboTax is using a larger denominator or excluding taxes from the numerator. Some items that have an effect are: 

• Muni bonds
• Social Security nontaxable
• Self Employment tax
• Refundable credits

Look at your 1040 line 24 for total tax and line 9 for total income. You will be able to see the nontaxed income and refundable credits that are throwing off the calculations.

Of course, the biggest concern is the actual tax liability which is calculated on a smart worksheet (1040 between lines 15 and 16) or through the Qualified Dividends/ Capital Gain Tax Worksheet. You can look for those in your return.

[TurboLover2]

@AmyC 

Thank you for your reply.  However, try as I may I am unable to reproduce the given "Effective Tax Rate."  There really should be a worksheet to show how it is calculated and what it includes.  It is too difficult to try to reconstruct it without that and without knowing how it is constructed, the meaning of it is not clear.

You wrote:

"Look at your 1040 line 24 for total tax and line 9 for total income. You will be able to see the nontaxed income and refundable credits that are throwing off the calculations."

I tried this.  The only income that is partially tax exempt on this return is Social Security.  But even when I adjust for that, the resulting percentage differs from the one given on the TT summary.

With no worksheet showing how it is calculated, I cannot reproduce it or know what it represents and therefore it is not useful.