Home Office Deduction: Why the Regular Method Often Pays More

The home office deduction lets you deduct the business share of your home costs if you use part of your home regularly and exclusively for your own business. The simplified method is a flat $5 per square foot, up to 300 square feet, so it tops out at $1,500. The regular method deducts your actual costs times the business percentage, with no fixed cap.

For an office of up to 300 square feet, the regular method wins whenever your yearly home costs are above $5 per square foot of your whole home, which is common for renters in expensive markets. The IRS describes both. Employees can’t claim it, and a space the family also uses doesn’t qualify. If you own your home, the regular method has a cost that shows up years later, when you sell. Below are worked examples for a renter and an owner, and the cases where the deduction doesn’t apply. To compare both methods with your own numbers, use the home office deduction calculator.

Do you qualify for the home office deduction?

Both methods share one eligibility test. According to Publication 587, you need a specific part of your home that you use:

• Exclusively for your business. A space you use for both business and personal purposes fails. The IRS example is an attorney who writes briefs in a den the family also uses for recreation.
• Regularly. Incidental or occasional business use doesn’t count.
• And as your principal place of business, or as a place where you meet or deal with clients or customers in the normal course of business, or as a separate free-standing structure, such as a studio, workshop, garage or barn, used for the business.

A home office can be your principal place of business even if you do much of the work elsewhere, as long as you use it for your administrative or management work (billing, bookkeeping, ordering supplies, setting up appointments, writing reports) and have no other fixed location where you do substantial administrative work. Doing paperwork in a car or hotel room, or serving clients at a location outside your home, does not disqualify you.

The space can be a room or any other separately identifiable area. It does not need a permanent partition.

When you can’t claim it, or shouldn’t

• You are an employee. The IRS says taxpayers can no longer claim a home office deduction as an employee, because miscellaneous itemized deductions for employee business expenses were eliminated for tax years beginning after 2017, even with the simplified method. If you have a W-2 job and a side business, you can claim it only for the side business. The Form 8829 instructions also say you can’t deduct expenses for business use of your home as an employee on your personal return.
• The space is not exclusive. A desk in the living room, a guest bedroom with a laptop on the bed or a kitchen table fails the test.
• The activity is not a business. Publication 587 says that if you use your home for a profit-seeking activity that is not a trade or business, you can’t deduct its business use. Its example is reading financial reports and clipping coupons for your own investments.
• The income limit wipes it out. Both methods are capped by the income the business earns, as explained below.
• The tax saving is smaller than the cost. With the simplified method the deduction is at most $1,500, which saves $231 in our $80,000 example. If you own your home and take the regular method, depreciation reduces the part of a future home sale gain you can exclude (see selling the home).

Simplified vs. regular method: which pays more?

Can renters claim it? Yes. Publication 587 says a renter who meets the requirements can deduct part of the rent, using the percentage of the home used for business, so the regular method is usually worth testing first.

Simplified method. Multiply the square footage of your office by $5, counting at most 300 square feet. A 200-square-foot office gives $1,000, and a 350-square-foot office is capped at 300 × $5 = $1,500. You can’t deduct any actual home expense or depreciation for that year.

Regular method. You figure your business percentage by dividing the area used for business by the total area of your home. A 200-square-foot office in a 1,000-square-foot apartment is 20%. You apply it to your indirect expenses, the costs of running the whole home, such as rent, utilities, insurance and general repairs. Direct expenses for the office alone, like painting just that room, are deductible in full. Sole proprietors figure it on Form 8829 and carry the result to Schedule C, line 30.

Worked example 1: a freelancer who rents

You rent a 1,000-square-foot apartment and use a 200-square-foot spare room exclusively as your office, so your business percentage is 20%. Over 2026 you pay $24,000 in rent, $2,400 in utilities and $240 for renter’s insurance. Your net profit before the deduction is $80,000 and you file as single with no other income. Publication 587 says a renter can deduct the rent percentage the same way as other indirect costs.

The regular method is worth $5,328, more than five times the simplified method’s $1,000. Because it comes off Schedule C, it reduces self-employment tax as well as income tax. At $80,000 of profit that is about $1,229 of federal tax saved, against $231 for the simplified method (2026 rates, our calculator’s functions, state tax not included). It also lowers the profit your quarterly estimated payments are based on.

Worked example 2: a homeowner

Now the same $80,000 of profit and a 200-square-foot office in a 2,000-square-foot home you own, so the business percentage is 10%. For the year you pay $12,000 of mortgage interest, $5,000 of property tax, $1,800 of insurance, $3,600 of utilities and $600 of repairs, a whole-home total of $23,000. We assume you take the standard deduction, as our calculator does. For depreciation we assume the house, excluding land, has an adjusted basis of $300,000 (Publication 587 uses the lower of that basis and the home’s market value when you first use it for business). The business part is 10%, or $30,000, and 39-year straight-line depreciation on a full year is about $769.

The regular method saves about $477 more a year in federal tax here ($708 minus $231). The price is the depreciation. Under the simplified method you claim none and the IRS says there is no depreciation recapture for those years. Under the regular method, depreciation lowers your basis, and that matters when you sell.

What happens when you sell the home

The usual exclusion applies. Publication 587 says that if you meet the ownership and use tests you may be able to exclude up to $250,000 of gain ($500,000 for certain married couples filing jointly), and a home office inside your home does not force you to split the sale or file Form 4797. There is one exception: you can’t exclude the part of the gain equal to any depreciation allowed or allowable after May 6, 1997.

Two details people miss:

• Skipping depreciation doesn’t avoid it. The IRS says you must adjust your home’s basis for depreciation that was allowable for the business use, even if you did not claim it. If you use the regular method, claim it.
• The simplified method keeps the house clean. Depreciation is treated as zero for those years, so there is nothing to recapture.

In the owner example, ten years of regular-method depreciation at $769 a year is $7,690 (hypothetical, ten full years at the same rate). If you later sell at a gain, up to $7,690 of that gain would sit outside the exclusion and be taxable. A separate structure, like a detached studio, follows stricter rules: you can’t exclude its gain unless you owned and lived in that part of the property for at least 2 years of the 5 years before the sale. Talk to a tax professional before selling a home you have depreciated.

Weigh the extra annual saving against that future cost. You can change methods every year, so the choice isn’t locked in.

What the choice is worth at different costs

Take a 200-square-foot office in a 1,000-square-foot rented home (20% of the home) and $80,000 of net profit:

The income limit

Both methods are capped by the income the business earns from the home. Publication 587 says that if the gross income from the business use of your home is less than your total business expenses, your deduction for otherwise nondeductible home expenses such as insurance, utilities and depreciation (and rent, which Publication 587 says carries over when it exceeds the limit) is limited to that gross income minus two things: the business part of expenses you could deduct anyway (such as mortgage interest and real estate taxes), and the business expenses not related to the use of the home, such as supplies and equipment. Self-employed people don’t include the deduction for half of self-employment tax in the second item. Depreciation is taken last.

For a profitable year this limits nothing. In a weak year it does. Take a renter with the same office and costs as example 1 but a weak year (hypothetical): $9,000 of gross income from the business and $6,000 of other business expenses unrelated to the home. There is no mortgage interest or real estate tax, so the limit is $9,000 minus $6,000, which is $3,000.

The unused $2,328 carries to the next year in which you use actual expenses, where it is subject to that year’s limit. The IRS page adds a trap for switchers: a carryover from a regular-method year may not be claimed in a year you use the simplified method.

Part-year use and moves

Under the regular method you can’t deduct expenses for any part of the year you did not use the home for business. If you begin on July 1 and meet every test from then on, only the expenses of the last half of the year count.

Under the simplified method the deduction follows the average monthly square footage. You add the allowable square feet for each month, divide by 12, count no more than 300 square feet in any month, and use zero for any month with fewer than 15 days of qualified use. A freelancer who starts a 200-square-foot office on July 1 (hypothetical) has six months at 200 square feet: 1,200 divided by 12 is 100 square feet on average, so the deduction is 100 × $5 = $500.

Records and where it goes on the return

You may use any recordkeeping method, but Publication 587 says your records must show the part of the home you use for business, that you use it exclusively and regularly in a qualifying way, and the expenses and depreciation for the business part. Keep canceled checks and receipts for as long as they matter for any tax law, which the IRS describes as usually the later of 3 years from the return due date or the date filed, or 2 years after the tax was paid.

A sole proprietor reports the whole deduction on Schedule C, line 30. The Form 8829 instructions say to use a separate Form 8829 for each home used for the business, and not to use it if you elected the simplified method or if all the expenses belong in inventory costs on Schedule C, Part III. Because the deduction reduces Schedule C profit, it also reduces what self-employment tax and the QBI deduction are figured on. If your home office is your principal place of business, you can also deduct the daily transportation between home and another work location in the same business, covered in our mileage guide. A bigger deduction lowers the profit you are estimating, so redo your numbers for how much to set aside.

How we got these figures

The $5 rate, the 300-square-foot cap, and the no-carryover and no-depreciation rules come from the IRS simplified option page and Publication 587. The qualifying tests, expense types, rent rule, income limit, part-year rules, sale of the home and recordkeeping come from Publication 587, and the Form 8829 rules from its instructions. We opened all three on October 15 and reread the 2025 Publication 587 on October 20, 2026, and quote the exact passages in our research file. We did not open Rev. Proc. 2013-13 itself. The tables are our own arithmetic with the formulas in those documents, using the same functions as our home office calculator, and the incomes, costs and home values are hypothetical. They assume you meet the exclusive and regular use tests. For how we pick and check sources, see How We Research.