First, he figures the business part of expenses that would be deductible even if he did not use part of his home for business. These expenses ($4,500 deductible mortgage interest and $1,000 real estate taxes) relate to his entire home, so he enters them in column (b) on lines 10 and 11. He then subtracts the $550 business part of these expenses (line 14) from his tentative business profit (line 8). The result, $25,002 on line 15, is the most he can deduct for his other home office expenses.
Form 4562 Example
Form 4562, Part I, lines 1-13
Form 4562, Part III, line 19c
Form 4562, Part III, line 19i
Form 4562, Part IV, line 22
Schedule C Example
Schedule C, Line 13
Schedule C, Line 16b
Schedule C, Line 25
Schedule C, Lines 28-30
Form 8829 Example
Form 8829, Part II, Step 1
Form 8829, Part II, Step 2
Form 8829, Part II, Step 3
Form 8829, Part II, Step 4
Information courtesy of the Internal Revenue Service.
