What Is Form 4952 and How to Fill Out Your 4952 Form?


Understanding Form 4952 is crucial for anyone with investment income.

This form, issued by the Internal Revenue Service (IRS), is used to calculate the amount of investment interest expense you can deduct from your tax return.

If you’ve paid interest on money borrowed to invest, you’ll need to file Form 4952.

Components of Form 4952


Form 4952 is divided into three parts, each serving a specific purpose.

 Investment Interest Expense Deduction

This section is where you calculate your deductible investment interest expense for the current year.

  • Line 1: Investment Interest Paid: Here, you’ll enter the total amount of investment interest you paid during the tax year.
  • Line 2: Investment Income: This is where you’ll report your net investment income. This includes interest, dividends, and certain royalties.
  • Line 3: Net Investment Income: Subtract any investment expenses (other than interest expenses) from Line 2 to get your net investment income.
  • Line 4: Investment Interest Expense Deduction: This is the amount you can deduct this year. It’s the smaller of Line 1 or Line 3.

Investment Interest Expense Deduction for Prior Years

This section is for calculating any disallowed investment interest expense from prior years that you can deduct this year.

  • Line 5: Disallowed Investment Interest Expense from Prior Years: Enter the amount from last year’s Form 4952, Line 8.
  • Line 6: Total Investment Interest Expense Deduction: Add Line 4 and Line 5. This is your total deduction for the current year.

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Disallowed Investment Interest Expense to be Carried Forward

This section helps you calculate any disallowed investment interest expense that you can carry forward to next year.

  • Line 7: Disallowed Investment Interest Expense: Subtract Line 6 from Line 1.
  • Line 8: Investment Interest Expense to be Carried Forward: If Line 7 is more than zero, this amount can be carried forward to next year.

How to Fill Out Form 4952?


Filling out Form 4952 can be a bit complex, but with the right guidance, it’s manageable.

Step-by-Step Guide to Completing Form 4952

  1. Gathering Necessary Information: Start by gathering all your financial documents related to your investments.
  2. Filling Out Each Part of the Form: Use the information you’ve gathered to fill out each part of the form as described above.
  3. Reviewing and Submitting the Form: Once you’ve filled out the form, review it for accuracy, then submit it with your tax return.

Common Mistakes When Filling Out Form 4952


Avoid these common mistakes when filling out Form 4952:

  • Incorrectly Calculating Investment Interest Expense: Ensure you include all interest paid on money borrowed for investment purposes.
  • Failing to Include All Relevant Investment Income: All investment income, including dividends and interest, should be included.
  • Not Carrying Forward Disallowed Investment Interest Expense: If you have disallowed interest from previous years, don’t forget to carry it forward.

Tips for Filing Form 4952

Here are some tips to help you file Form 4952:

  • Keeping Accurate Records of Investment Activity: This will make it easier to fill out the form accurately.
  • Consulting with a Tax Professional: They can provide advice tailored to your specific situation.
  • Utilizing Tax Software: Many tax software programs can help you fill out Form 4952 correctly.

FAQs About Form 4952


Here are answers to some common questions about Form 4952:

Can I Deduct Investment Interest Expense Without Filing Form 4952?

No, you must file Form 4952 to claim this deduction.

What Happens If I Make a Mistake on Form 4952?

If you discover a mistake after filing, you can amend your return using Form 1040X.

How Do I Amend a Previously Filed Form 4952?

You'll need to complete a new Form 4952 and attach it to your amended return.


Filing Form 4952 accurately is crucial for maximizing your investment interest expense deduction.

If you need further assistance, consider consulting with a tax professional or using tax software.

Remember, accurate record-keeping and understanding the form’s components are key to a successful filing.