16.5 Home Office Deduction
Key Takeaways
Exclusive and regular use required.
Principal place of business OR admin with no other office.
Simplified Method (Tax Year 2025): $5/sq ft, max 300 sq ft = $1,500 (rate unchanged by OBBBA).
Actual Expense: allocate costs by business %.
W-2 employees cannot claim home office (TCJA suspension made permanent by OBBBA).
Net income limitation with carryforward.
Why This Matters for the Exam
Home office rules are tested every exam. Know the exclusive use test, simplified method rates, and the W-2 employee trap.
Qualifying Tests
| Test | Requirement |
|---|---|
| Exclusive use | Space used ONLY for business |
| Regular use | Continuing, not occasional |
| Principal place | Main location for business OR admin with no other office |
Exclusive Use Exceptions
| Exception | Exclusive Use Required? |
|---|---|
| Inventory storage | No |
| Daycare facility | No |
Principal Place of Business
| Qualifies If | Description |
|---|---|
| Admin/management activities | Done at home |
| No other fixed office | For substantial admin work |
Two Methods
| Method | Calculation |
|---|---|
| Simplified | $5/sq ft × up to 300 sq ft |
| Actual Expense | Allocate actual costs |
Simplified Method (Tax Year 2025)
| Element | Amount |
|---|---|
| Rate | $5 per sq ft |
| Maximum sq ft | 300 |
| Maximum deduction | $1,500 |
Actual Expense Method
| Expense Type | Treatment |
|---|---|
| Direct (office paint) | 100% deductible |
| Indirect (utilities, insurance) | Allocate by business % |
| Depreciation | MANDATORY (39-year nonresidential) |
Method Comparison
| Feature | Simplified | Actual |
|---|---|---|
| Rate | $5/sq ft | Actual costs |
| Max size | 300 sq ft | No limit |
| Depreciation | None | Required |
| Recapture on sale | None | Required (25% max) |
| Form | Computed on Sch. C | Form 8829 |
Net Income Limitation
| Rule | Description |
|---|---|
| Deduction cannot exceed | Business gross income - other expenses |
| Order | Interest/taxes → utilities → depreciation |
| Excess | Carried forward indefinitely |
The Employee Trap
| Status | Home Office Allowed? |
|---|---|
| Self-employed | Yes |
| W-2 employee | NO (TCJA suspended 2018-2025; OBBBA made permanent) |
Real-World Scenario (Tax Year 2025)
Scenario: Consultant uses 200 sq ft home office exclusively for business.
- Simplified method: 200 × $5 = $1,000.
- Actual (if calculated): Would require Form 8829.
- Result: $1,000 deduction (simplified).
Net Income Example
| Item | Amount |
|---|---|
| Business gross income | $5,000 |
| Other business expenses | $4,500 |
| Available for home office | $500 |
| Calculated home office | $2,000 |
| Deductible this year | $500 |
| Carryforward | $1,500 |
On the Exam
Question types to practice on home office:
- Simplified Questions: "What is the max deduction for 200 sq ft?"
- Exclusive Use Questions: "Does this space qualify?"
- Employee Questions: "Can W-2 employee claim home office?"
The key is to remember: Exclusive + regular use. Simplified = $5/sq ft × 300 max = $1,500 (Tax Year 2025). W-2 employees = no deduction.
Consultant uses 200 sq ft exclusively for business. Tax Year 2025 simplified method deduction?
$1,000
$1,200
$1,500
$1,800
Freelancer: $5,000 gross, $4,500 expenses, $2,000 home office calculated. Deductible?
$500
$1,500
$2,000
$5,000
What disqualifies home office deduction?
Space for business + homework
Principal place of business
W-2 employee
Both A and C
Sections you finish are checked off in the contents.