Line 4.
If you file Schedule F, enter your total gross income that is related to the business use
of your home. This generally would be the amount on line 11 of Schedule F.
If you are an employee, enter your total wages that are related to the business use of your home.
Lines 5-7.
Enter only the amounts that would be deductible whether or not you used your home
for business. In other words, enter only the amounts that would be allowable as itemized
deductions on Schedule A (Form 1040).
Include only the part of a casualty loss that exceeds $100 plus 10% of adjusted gross income.
Under column (a), "Direct Expenses," enter expenses that benefit only the business part of your home. Under column (b), "Indirect Expenses," enter expenses that benefit the entire home. You generally enter 100% of the expense. However, if the business percentage of an indirect expense is different from the percentage on line 3, enter only the business part of the expense on the appropriate line in column (a), and leave that line in column (b) blank.
Lines 9-10.
Multiply your total indirect expenses (line 8, column (b)) by the business percentage
from line 3. Enter the result on line 9. Add this amount to the total direct
expenses (line 8, column (a)) and enter the total on line 10.
Lines 11-13.
Enter any other business expenses that are not attributable to business use of the
home on line 11. For employees, examples include travel, supplies, and business
telephone expenses. Farmers generally should enter their total farm expenses before
deducting office in the home expenses. Do not enter the deduction for one-half of
your self-employment tax. Add the amounts on lines 10 and 11, and enter the total
on line 12. Subtract line 12 from line 4, and enter the result on line 13. This is
your deduction limit. You use it to determine whether you can deduct any of your
other expenses for business use of the home this year. If you cannot, you will carry
them over to next year.
If line 13 is zero or less, enter zero. Deduct your expenses for deductible home mortgage interest, real estate taxes, casualty losses, and any business expenses not attributable to use of your home on the appropriate lines of the schedule(s) for Form 1040 as explained earlier under Where To Deduct.
Lines 14-21.
On lines 14 through 18, enter your otherwise nondeductible expenses for the business
use of your home. These include utilities, insurance, repairs, and maintenance. If
you rent, include the amount paid on line 18. If you file Schedule F, include any
part of your home mortgage interest that is more than the limits given in
Publication 936. (If you are an
employee, do not enter any excess home mortgage interest.) In column (a), enter the
expenses that benefit only the business part of your home (direct expenses). In
column (b), enter the expenses that benefit the entire home (indirect expenses).
Multiply line 19, column (b) by the business-use percentage (line 3) and enter this
amount on line 20.
If you claimed a deduction for business use of your home on your 2002 tax return, enter the amount from line 39 of your 2002 worksheet on line 21.
Lines 24-29.
On lines 24 through 29, figure your limit on deductions for excess casualty losses and depreciation.
On line 25, figure the excess casualty loss by multiplying the business use percentage from line 3 by the part of casualty losses that would not be allowable if you did not use your home for business (i.e., the casualty losses in excess of the amount on line 5).
On line 26, enter the depreciation deduction from Part 3.
If you claimed a deduction for business use of your home on your 2002 tax return, enter on line 27 the amount from line 40 of your 2002 worksheet.
On lines 28 and 29, figure your allowable excess casualty losses and depreciation.
Lines 30-32.
On line 30, total all allowable business use of the home deductions.
On line 31, enter the total of the casualty losses shown on lines 10 and 29. Enter the amount from line 31 on line 27 of Form 4684, Section B. See the instructions for Form 4684 (pdf) for more information on completing that form.
Line 32 is the total (other than casualty losses) allowable as a deduction for business use of your home. If you file Schedule F (Form 1040), enter this amount on line 34 of Schedule F and write "Business Use of Home" on the line beside the entry. Do not add the specific expenses into other line totals of Part II of Schedule F.
If you are an employee or partner, see Where To Deduct, for information on how to claim the deduction.
Worksheet to Figure the Deductions for Business Use of Your Home
Instructions for the Worksheet
Part 1 - Part of Your Home Used for Business
Part 2 - Figure Your Allowable Deduction
Part 3 - Depreciation of Your Home
Part 4 - Carryover of Unallowed Expenses to Next Year
Information courtesy of the Internal Revenue Service.
