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Form 4952: Investment Interest Expense Deduction
IRS Form 4952 is used to calculate the amount of investment interest expense that can be deducted for 2025 and any amount carried forward to future years. This form applies to individuals, estates, or trusts; the deduction is limited to net investment income.
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IRS Form 4952 - Investment Interest Expense Deduction
IRS Form 4952 is used to calculate the amount of investment interest expense that can be deducted for 2025 and any amount carried forward to future years. This form applies to individuals, estates, or trusts; the deduction is limited to net investment income.
Risk Radar
Scan points- 1The deduction must be limited to your net investment income (the smaller of line 3 or line 6).
- 2Failing to exclude personal interest under section 163(h) when calculating total investment interest expense on Line 1.
- 3Incorrectly determining net investment income (Line 6), which limits the final deduction amount.
- 4For individuals, failing to report attributable royalty expenses on Schedule E (Form 1040).
- 5For estates and trusts, entering the deductible amount on Form 1041, line 10, rather than another required schedule.
Plain English
This form helps determine how much of your interest paid on investments you can subtract from your taxable income. Since tax law limits this deduction, Form 4952 ensures you only claim an amount that matches your overall investment earnings. It allows you to track any excess deductible interest so it can be used in future years.
Submission Date
- Filing date: 2025-10-17 22:10:10
- Preparation window: collect IDs, supporting records, and signatures in advance.
- Final review: verify names, dates, and required fields before submission.
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What this form is for
- Use this form when an individual, estate, or trust is claiming a deduction for investment interest expense for 2025 and needs to calculate any amount to carry forward to future years.
- Do not use it when all of the following exceptions apply: if the interest expense is capitalized (e.g., construction interest subject to section 263A); if the interest expense relates to tax-exempt interest income under section 265; or if the disallowed interest expense is related to life insurance, endowment, or annuity contracts issued after June 8, 1997.
- Check Form 6198 instead when deductible investment interest expense is attributable to an activity for which the filer is not at risk.
Form selector
Use this form or another form?
When calculating tax using foreign tax credits
The filer may need to make an election on Form 4952, line 4e, regarding how much of the amount is attributable to line 4g versus line 4b if filing Form 1116.
✓ Review instructions for making elections related to foreign tax credits.
When determining investment interest expense for activities where the filer lacks sufficient risk
If any deductible investment interest expense is attributable to an activity for which the filer isn’t at risk, Form 6192 must be used to determine the final deductible amount.
✓ Ensure the part of the expense attributable to the at-risk activity is included on Form 6198, line 4.
When determining adjustments for Alternative Minimum Tax (AMT)
Deductible interest expense may be an adjustment when calculating the Alternative Minimum Tax.
✓ Consult Form 6251, Alternative Minimum Tax—Individuals, for specific AMT details.
Form 6251 or Schedule I (Form 1041)
Deadline or filing window
Not stated in the official source.
Checklist
What you need before filling it out
Total investment interest expense (Line 3)
Add lines 1 and 2. · Part I of Form 4952
Investment interest expense deduction (Line 8)
Enter the smaller of line 3 or line 6. · Part I of Form 4952
Net Investment Income (Line 6)
Calculate gross income from property held for investment minus qualified dividends included on line 4b. · Part II of Form 4952
Identifying information (Name(s) shown on return)
The name(s) listed on the tax return. · Part I of Form 4952
Before you submit
- 1Verify line 1 includes all investment interest expense paid or accrued in 2025.
- 2Include disallowed investment interest expense from 2024 Form 4952, line 7, on line 2.
- 3Calculate the total investment interest expense by adding lines 1 and 2 to determine line 3.
- 4Determine net investment income using Part II, ensuring qualified dividends are correctly subtracted (Line 6).
- 5Enter the smaller of line 3 or line 6 on line 8 for the final deduction amount.
- 6If making an election related to Form 1116, enter 'Elec.' next to line 4e and specify the portion attributed to line 4g.
- 7Confirm that if deductible investment interest expense is attributable to a non-at-risk activity, Form 6198 has been completed.
How to file this form
- 1Complete Part I by entering the total investment interest expense on line 3 after adding lines 1 and 2.
- 2Calculate net investment income in Part II, determining the figure used for comparison with line 3.
- 3Determine the final deduction amount by selecting the smaller value between line 3 (total investment interest expense) and line 6 (net investment income), entering this on line 8.
- 4Attach Form 4952 to the tax return when filing.
Known limitations
- 1Investment interest expense paid or accrued must be allocable to property held for investment.
- 2Personal interest under section 163(h), including qualified residence interest, is excluded from investment interest expense.
- 3Interest expense properly allocable to a passive activity is generally excluded from investment interest expense.
Field map
Compact field-by-field guide
General Info
2 items
Full legal name and taxpayer identification number (SSN or EIN).
Current mailing address.
Details
2 items
Complete all applicable sections of this form according to the official IRS instructions.
Enter the relevant dollar amount if this form involves tax calculation.
Certification
1 items
Read and acknowledge any certifications required by this form.
Signatures
1 items
Sign and date. Unsigned forms cannot be processed.
Almost done reviewing the fields?
Fillable formOpen in Editor->The current edition of IRS Form 4952 is for the year 2025, with a creation date of 5/28/25. Users must visit www.irs.gov/Form4952 for the latest information.
What changed or needs a fresh check
- Edition date — confirm the form is labeled (2025) on page 1.
- Fee — Not stated in the official source
- Mailing address — Not stated in the official source
- Signature — The filer must attach Form 4952 to their tax return.
Quick Facts
Downloads
After you file
- 1Keep a copy of Form 4952, as this document determines your final Investment Interest Expense Deduction for tax purposes.
- 2Use the calculated deductible amount on Line 8 when completing other required federal income tax forms.
- 3If you entered an excess deduction that can be carried forward, retain records showing the specific amount for future filing years.
- 4Confirm if any changes to investment interest rules or limitations occurred between your filing date and the next tax cycle; this is worth re-checking.
- 5For all current guidelines regarding Form 4952, you should confirm the latest instructions at www.irs.gov/Form4952.
Sources
- SRCInstructions p.3 — The Purpose of Form 4952 is to figure the amount of investment interest expense you can deduct for 2025 and the amount you can carry forward to future years.
- SRCForm p.1 — Part I, Line 1 requires entering the investment interest expense paid or accrued in 2025.
- SRCInstructions p.3 — Investment interest expense includes amounts reported on Schedule K-1 from a partnership or an S corporation.
- SRCInstructions p.3 — The deduction is limited to net investment income (Part II).
- SRCForm p.4 — Individuals generally enter the amount from line 8 on Schedule A, line 9.
- SRCForm p.4 — Estates and trusts generally enter the amount from line 8 on Form 1041, line 10.
Common confusion points
Do I still need to file Form 4952 if some of my income comes from a partnership or S corporation?
The total investment interest expense includes amounts reported on Schedule K-1 from a partnership or an S corporation.
If I have both long-term and short-term capital gains, how do I calculate the net gain for line 4d?
Where does the amount calculated in Part III—Investment Interest Expense Deduction go if I am an individual?
Do I need to report royalties separately from my investment interest expense deduction?
What happens if I elect to include qualified dividends and net capital gain on line 4g?
Workflow map
Related forms and next steps
Before
Current
After
Often used with
⚠ If something goes wrong
- Form 8814 — Parents’ Election To Report Child’s Interest and Dividends may include part or all of a child’s income on line 4a.
Questions about IRS Form 4952
What is IRS Form 4952 used for?
This form helps determine how much of your interest paid on investments you can subtract from your taxable income. Since tax law limits this deduction, Form 4952 ensures you only claim an amount that matches your overall investment earnings. It allows you to track any excess deductible interest so it can be used in future years.
Who must file IRS Form 4952?
Individuals, estates, or trusts must file Form 4952 if they wish to claim a deduction for their investment interest expense. An exception exists if certain conditions are met regarding the filer's activities.
What information does IRS Form 4952 require?
The form collects information across three parts: Part I calculates the total investment interest expense; Part II determines net investment income by combining various sources of earnings and expenses; and Part III calculates the final Investment Interest Expense Deduction, which is limited to the smaller amount of lines 3 or 6.
Where do I file IRS Form 4952?
For the latest information regarding Form 4952, users should go to www.irs.gov/Form4952.
How do I complete IRS Form 4952?
First, complete Part I by entering the total investment interest expense (Line 1) and any disallowed amounts carried forward from 2024 (Line 2), resulting in a total on Line 3. Next, calculate net investment income on Line 6 using data from Part II. Finally, determine the deductible amount on Line 8 by entering the smaller of line 3 or line 6.
What happens if IRS Form 4952 is filed incorrectly?
The deduction is limited to net investment income; if the calculation results in zero or less, the filer must enter -0- on line 6 and subsequently determine the deductible amount using the smaller of lines 3 or 6.
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