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Form 4952: Investment Interest Expense Deduction
IRS Form 4952 is the Investment Interest Expense Deduction form for 2025. It calculates the deductible amount of investment interest you paid, limited to your net investment income, and must be filed by individuals, estates, and trusts.
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IRS Form 4952 - Investment Interest Expense Deduction
IRS Form 4952 is the Investment Interest Expense Deduction form for 2025. It calculates the deductible amount of investment interest you paid, limited to your net investment income, and must be filed by individuals, estates, and trusts.
Risk Radar
Scan points- 1Claiming a deduction larger than your net investment income on line 8.
- 2Including personal residence interest (section 163(h)) as investment interest expense.
- 3Leaving out investment interest reported on Schedule K‑1 from a partnership or S corporation.
- 4Failing to add line 1 and line 2, resulting in an incorrect total on line 3.
- 5Miscalculating net investment income by not applying the election for qualified dividends or capital gains (line 4g).
Plain English
Form 4952 tells you how much of the interest you paid on loans for investment assets you can deduct. It compares that interest to the income those investments earned and limits the deduction to the lower amount.
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 you are an individual, estate, or trust filing a deduction for investment interest expense for 2025.
- Do not use it when all of the following apply: any interest expense that is capitalized, interest expense related to tax‑exempt interest income, or interest disallowed under section 264 on indebtedness for life insurance, endowment, or annuity contracts issued after June 8, 1997.
- Check Form 1116 instead when you are filing a Foreign Tax Credit and need to adjust the amount on line 4e.
Form selector
Use this form or another form?
Need to allocate part of investment interest to a foreign tax credit election
Adjusts line 4e amount to reflect foreign tax credit impact
✓ Confirm you are filing Form 1116 and that the election is timely
Deductible investment interest is attributable to an at‑risk activity
At‑risk limitations affect the deductible amount
✓ Verify at‑risk calculation on Form 6198 line 4
Interest expense may be an AMT adjustment
Alternative Minimum Tax may reduce deductible interest
✓ Determine AMT impact using Form 6251
Deadline or filing window
Not stated in the official source.
Checklist
What you need before filling it out
Line 1 – Investment interest expense paid or accrued
Total interest paid on investment loans · Found on loan statements or Schedule A
Line 2 – Disallowed investment interest expense from 2024
Amount from prior year Form 4952 line 7 · Prior year Form 4952
Line 8 – Investment interest expense deduction
Smaller of line 3 or line 6 · Calculated on the form itself
Part II line 4a – Gross income from property held for investment
Dividend and interest statements · Form 4952 Part II
Part II line 4b – Qualified dividends
Portion of dividends that are qualified · Dividend statements or Form 1099‑DIV
Before you submit
- 1Confirm the revision date reads 20/25 on the form.
- 2Enter the total investment interest expense on line 1.
- 3Enter any disallowed expense from 2024 on line 2.
- 4Add lines 1 and 2 to compute line 3.
- 5Calculate net investment income in Part II and fill lines 4a and 4b.
- 6Enter the smaller of line 3 or line 6 on line 8.
- 7Sign the form where required.
- 8Attach Form 4952 to your 2025 tax return.
- 9Retain a copy of the completed form for your records.
How to file this form
- 1Calculate your investment interest expense and net investment income.
- 2Complete Form 4952 with the calculated figures.
- 3Attach the completed Form 4952 to your 2025 tax return.
- 4Mail the return to the IRS address indicated for your filing category.
- 5Keep a copy of the mailed return and Form 4952 for your records.
Known limitations
- 1You do not have to file Form 4952 if all of the exception conditions apply. (source: [Form p.3])
- 2Investment interest expense does not include personal interest under section 163(h), including qualified residence interest. (source: [Form p.3])
- 3Investment interest expense does not include interest expense that is properly allocable to a passive activity. (source: [Form p.3])
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 form is the 2025 edition (revision 20/25), created 5/28/25, and the source directs filers to www.irs.gov/Form4952 for the latest information.
What changed or needs a fresh check
- Edition date — confirm the form shows revision 20/25 and creation date 5/28/25.
- Fee — Not stated in the official source.
- Mailing address — Not stated in the official source.
- Signature — Not stated in the official source.
- OMB number — confirm OMB No. 1545-0191 is present.
Quick Facts
Downloads
After you file
- 1Keep the completed Form 4952 and any attached schedules with your tax return records.
- 2Store the documents for at least three years after the filing year.
- 3Expect no separate IRS acknowledgment; the deduction appears on your tax return.
- 4If you discover an error, file an amended return using Form 1040X.
Sources
- SRC[Form p.3] Exception. You don’t have to file Form 4952 if all of the following apply.
- SRC[Form p.3] Investment interest expense doesn’t include personal interest under section 163(h), including qualified residence interest.
- SRC[Form p.3] Investment interest expense doesn’t include interest expense that is properly allocable to a passive activity.
- SRC[Form p.3] Part III—Investment Interest Expense Deduction Line 8 Individuals ... enter the amount on Schedule A (Form 1040), line 9.
- SRC[Form p.3] Part III—Investment Interest Expense Deduction ... if any part of the interest expense is attributable to royalties, enter that part on Schedule E (Form 1040).
- SRC[Form p.3] Estates and trusts. Enter the amount from line 8 ... on Form 1041, line 10.
- SRCNot stated in the official source — verify on the agency site
- SRCNot stated in the official source — verify on the agency site
- SRCNot stated in the official source — verify on the agency site
- SRCNot stated in the official source — verify on the agency site
Common confusion points
Do I need to file Form 4952 if I only have mortgage interest?
Mortgage interest is personal interest, which the form does not cover.
→ Verify that the interest is not classified as investment interest on line 1.
Can I include interest from a rental property that I don’t materially participate in?
Rental interest may be considered passive activity interest, which is excluded.
→ Check the passive activity rules and ensure it’s not allocated to investment interest.
What if I have qualified dividends, do they count as investment income?
Qualified dividends are listed on line 4b and affect the net investment income calculation.
→ Confirm the amount entered on line 4b matches your qualified dividend total.
Should I report capital gains on line 4a or line 4d?
Net gain from disposition belongs on line 4d, not line 4a.
→ Ensure any net gain is entered on line 4d.
Is the election on line 4g mandatory?
The election is optional and has tax consequences.
→ Review line 4g instructions before electing and note the revocation requires IRS consent.
Do I need to attach Form 4952 to my return if I file electronically?
The form must be attached to your tax return regardless of filing method.
→ Verify the electronic filing software includes Form 4952 as an attachment.
Workflow map
Related forms and next steps
Before
Current
After
Often used with
⚠ If something goes wrong
- Form 1040X – file an amended return to correct errors on Form 4952.
Questions about IRS Form 4952
What is IRS Form 4952 used for?
Form 4952 tells you how much of the interest you paid on loans for investment assets you can deduct. It compares that interest to the income those investments earned and limits the deduction to the lower amount.
Who must file IRS Form 4952?
Individuals, estates, and trusts must file IRS Form 4952 to claim an investment interest expense deduction.
What information does IRS Form 4952 require?
The form collects the total investment interest expense (line 1), any disallowed expense from the prior year (line 2), computes net investment income (lines 4a‑4h, 5, 6), and determines the allowable deduction (line 8).
How do I complete IRS Form 4952?
Enter the amount of investment interest paid or accrued on line 1 and any disallowed expense from 2024 on line 2, then add them for line 3. Complete Part II by reporting gross investment income, qualified dividends, net gains and other items to arrive at net investment income on line 6. In Part III, subtract line 6 from line 3 to get the disallowed amount (line 7) and enter the smaller of line 3 or line 6 as the deduction on line 8. Attach the completed Form 4952 to your tax return.
Do I need to file Form 4952 if I only have mortgage interest?
Mortgage interest is personal interest, which the form does not cover. Verify that the interest is not classified as investment interest on line 1.
Can I include interest from a rental property that I don’t materially participate in?
Rental interest may be considered passive activity interest, which is excluded. Check the passive activity rules and ensure it’s not allocated to investment interest.
What if I have qualified dividends, do they count as investment income?
Qualified dividends are listed on line 4b and affect the net investment income calculation. Confirm the amount entered on line 4b matches your qualified dividend total.
Should I report capital gains on line 4a or line 4d?
Net gain from disposition belongs on line 4d, not line 4a. Ensure any net gain is entered on line 4d.
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