Independent form guide. BrieflyGo is not affiliated with or endorsed by IRS, USCIS, SSA, DOL, or any U.S. government agency. Official forms are sourced from public government websites.
Official form guide
Form 8829: 8829
IRS Form 8829 is used to claim the home office deduction for a portion of a taxpayer’s residence used regularly and exclusively for business. File it with the individual income tax return when you meet the regular‑and‑exclusive test.
Need help with Form 8829?
Open it in the AI Editor for field guidance, checks, and PDF export.
Need help? AI Editor guides you through every field of Form 8829.
Start filling →Form Overview
IRS Form 8829 - 8829
IRS Form 8829 is used to claim the home office deduction for a portion of a taxpayer’s residence used regularly and exclusively for business. File it with the individual income tax return when you meet the regular‑and‑exclusive test.
Risk Radar
Scan points- 1A single mis‑calculated square‑footage figure can invalidate the entire home‑office deduction.
- 2Mis‑measuring the business space
- 3Including personal‑use expenses
- 4Using the simplified $5‑sq ft method when not allowed
- 5Failing to attach the form to the 1040
Plain English
If you work from a dedicated room or space in your house, Form 8829 lets you deduct part of rent, mortgage interest, utilities, and other expenses. It only applies when the space is used only for your trade or business, not for personal activities.
Submission Date
- Filing date: 2026-03-05 15:10:38
- Preparation window: collect IDs, supporting records, and signatures in advance.
- Final review: verify names, dates, and required fields before submission.
AI co-pilot
Fill it faster. Catch mistakes before you file.
What this form is for
- Use when you have a dedicated home office and are self‑employed.
- Do not use if you are an employee claiming unreimbursed expenses (Form 2106 is obsolete).
- Check Form 1040 Schedule C to confirm you are reporting business income.
Form selector
Use this form or another form?
Renting a separate office space
No home office deduction needed
✓ Verify business location before filing
Using the simplified method
Simpler calculation, limited to $1,500
✓ Ensure you qualify for the simplified option
Deadline or filing window
Form 8829 follows the same deadline as the individual return—typically April 15 of the following year, with automatic extensions to October 15 if you file Form 4868. No separate deadline exists for the home‑office form.
- —Total home square footage | Business area ÷ Total area | Business‑use % | Round to nearest tenth
- —Deductible expense | Expense amount × Business‑use % | Deduction amount | Do not exceed actual expense
Checklist
What you need before filling it out
Line 1 – Total expenses
Mortgage interest, rent, utilities, insurance · Year‑end statements, bills
Line 3 – Business‑use %
Measured square footage · Floor plan, measuring tape record
Line 5 – Depreciation
Cost of home, improvement records · Closing statement, receipts
Line 7 – Total deduction
Sum of calculated lines · Completed Form 8829 worksheet
Before you submit
- 1All expense totals match supporting bills.
- 2Business‑use percentage is calculated from accurate measurements.
- 3Each expense line is multiplied by the same percentage.
- 4Form 8829 is attached to the correct Form 1040 filing.
- 5Signature on Form 1040 is present and matches the taxpayer’s name.
- 6If filing electronically, the software includes Form 8829.
- 7Copy of the completed Form 8829 retained for records.
How to file this form
- 1Enter total home expenses on Schedule C, Part II.
- 2Complete Form 8829 worksheet to determine business‑use %.
- 3Transfer calculated amounts to the appropriate lines on Form 8829.
- 4Attach Form 8829 to the front of the Form 1040 packet.
- 5Mail or e‑file the entire return to the IRS address for your state.
- 6Retain a copy of the return and all supporting documents for 7 years.
Known limitations
- 1Form 8829 does not apply to employees with unreimbursed expenses.
- 2The simplified $5‑sq ft method caps the deduction at $1,500 and cannot be combined with actual expense method.
- 3Depreciation on a home used partly for personal purposes must be prorated.
- 4Only expenses for the portion of the home used exclusively for business qualify.
Field map
Compact field-by-field guide
Entity Info
1 items
Name and taxpayer ID of the entity claiming the credit.
Credit Info
1 items
Type of credit or incentive being claimed.
Calculation
2 items
The base amount used to calculate the credit.
Calculated credit amount after applying formulas and limitations.
Certification
1 items
Detailed breakdown supporting the credit calculation.
Signatures
1 items
Sign and date the form.
Almost done reviewing the fields?
Fillable formOpen in Editor->Form 8829 is currently the 2024 edition, published by the IRS. No major layout changes have been announced for 2025.
What changed or needs a fresh check
- Edition date: 2024
- Fee: none (included with 1040 filing)
- Mailing address: see Form 1040 instructions for your state
- Electronic filing: supported via IRS e‑file
- Paper size: 8.5" × 11"
- Signature requirement: taxpayer must sign Form 1040, not 8829
Quick Facts
Downloads
After you file
- 1Store the filed return and all receipts in a safe, organized folder.
- 2Track the business‑use percentage for the next year; it may change.
- 3Reconcile any estimated expenses with actual bills before the next filing.
- 4Monitor IRS notices for any adjustment to the home‑office deduction.
- 5If you sell the home, keep the Form 8829 records for capital‑gain calculations.
Sources
- SRCIRS Form 8829 instructionsconfirms purpose and filing with Form 1040.
- SRCIRS Publication 587Home office deduction rules.
- SRCIRS Schedule Clinks business expenses to Form 8829.
- SRCIRS e‑file guidelinesconfirms electronic filing is supported.
- SRCIRS Form 1040 instructionsmailing addresses for returns.
- SRCIRS Form 1040Xamendment process for home‑office errors.
Common confusion points
Square footage vs. percentage
People divide expense by total area instead of using %
→ Verify calculation matches measured %.
Exclusive use test
Some think occasional personal use disqualifies
→ Ensure the space is not used for personal activities at all.
Simplified vs. regular method
Users mix the two methods
→ Choose one method per tax year and stick with it.
Depreciation on a rented home
Renters cannot claim depreciation
→ Only owners may include depreciation.
Utilities allocation
Claiming 100% of utilities
→ Apply the business‑use % to all utility costs.
Workflow map
Related forms and next steps
Before
Current
After
Often used with
⚠ If something goes wrong
- Form 1040X – Amend return to correct home‑office deduction.
Source transparency
Copyright & Licensing - US Government Forms
BrieflyGo links to and explains official public form sources. We are not a government agency, and this page is for general form guidance, not legal advice.
Never sign without understanding every clause.
BrieflyGo reviews your contracts in plain English — instantly.