What Are Home Office Deductions?

Home office deductions allow eligible taxpayers to subtract certain expenses related to the part of their home used exclusively and regularly for work. This deduction is available for both self‑employed individuals and, under more limited conditions, employees who work from home. The deduction can cover a portion of your rent or mortgage interest, utilities, insurance, maintenance, and even depreciation on your home. Understanding the exclusive use and regular use tests is critical: the space must be used only for trade or business purposes, and it must be used on a continuing basis (not just occasionally). For employees, the home office must be for the convenience of the employer, not merely for your own convenience.

Since the Tax Cuts and Jobs Act (TCJA) suspended the deduction for unreimbursed employee expenses through 2025, most W‑2 employees can no longer claim home office deductions on their federal returns. However, self‑employed individuals — including gig workers, freelancers, and independent contractors — continue to benefit. The deduction reduces your adjusted gross income and can also lower self‑employment tax because it directly reduces net business income. Understanding the nuances of the home office deduction can save you hundreds or even thousands of dollars each year, provided you meet the IRS’s strict requirements.

Qualifying for the Home Office Deduction

The Exclusive Use Test

To qualify, the area you claim must be used only for your business. A spare bedroom that doubles as a guest room does not qualify. Even a corner of a room can qualify if it is clearly defined and used exclusively for work—a desk in the living room does not automatically fail if you partition it with a room divider and never use that space for personal activities. The IRS expects you to treat the office as a separate business location. If you occasionally check personal emails on the same computer, that might be acceptable as long as the space itself is exclusive. However, storing personal items in the office, such as a bicycle or clothing, could jeopardize the deduction. A separate structure, such as a detached garage or shed used solely as an office, passes the exclusive use test more easily.

What if you run two different businesses from the same home office? It’s permissible because both uses are business‑related. But if one business uses the space and the other doesn’t, you must allocate. The IRS allows multiple sole proprietors to share the same exclusive space.

The Regular Use Test

Regular use means you use the space consistently. A few hours every week for occasional paperwork may not meet the standard, but a few hours each day likely does. The IRS does not define an exact number of days or hours, but the use must be ongoing and not merely incidental. For example, a teacher who grades papers at home three evenings a week might qualify, but a person who only uses a home office twice a month for paying business bills probably does not. Regular use is easier to prove if you maintain a business calendar, appointment book, or log of work performed in the space.

Principal Place of Business

Your home office must be either your principal place of business or a place where you meet with clients, customers, or patients in the normal course of business. If you perform administrative or management activities there and have no other fixed location for those tasks, it generally qualifies as your principal place of business—even if you also do work elsewhere. This is especially relevant for traveling professionals who manage their business from home when not on the road. The IRS provides a “facts and circumstances” test: consider the relative importance of activities performed at home versus elsewhere, and the time spent. If you have an outside office but do all your billing, scheduling, and recordkeeping at home, that supports your home office being your principal place for administrative tasks.

Types of Deductible Expenses

Home office expenses fall into two categories: direct expenses and indirect expenses. Direct expenses are those solely for the office space (e.g., painting or repairs inside the office). Indirect expenses benefit the entire home (e.g., mortgage interest, property taxes, insurance, utilities), and only the business percentage is deductible. Some expenses fall in between: for instance, a roof repair that protects the entire home is indirect; replacing a window in the office is direct.

Rent or Mortgage Interest

If you rent, a portion of your rent is deductible. If you own, you can deduct a percentage of your mortgage interest (not the principal portion of your mortgage payment). Property taxes are also allocated. Note: home office deductions cannot create or increase a net loss from your business; they can offset business income but not produce a loss that reduces other income. If your business income is $10,000 and your allocable home office expenses total $12,000, you can only deduct $10,000. The remaining $2,000 may be carried forward to the next year if you use the regular method (simplified method does not allow carryover).

Utilities and Services

Electricity, gas, water, and trash removal are partially deductible. Internet service is partially deductible if needed for your business. Cell phone bills can be deducted separately under business use percentage. Landline phones: if you have a second line solely for business, it is 100% deductible; the first line cannot be deducted as a home office expense. If you work from home 40% of the time but use the internet for business every day, you can allocate that portion. It’s wise to keep a log of business vs. personal usage for services like phone and internet.

Insurance

Homeowners or renters insurance premiums can be partially deducted. If you have separate business insurance for your home office, that is fully deductible as a direct expense. For example, an in‑home daycare may require additional liability coverage; that extra premium is 100% deductible.

Repairs and Maintenance

Repairs that affect only the office (e.g., fixing a window in the office) are 100% deductible. Repairs to common areas (e.g., roof repair) are allocated based on the business‑use percentage. General maintenance (e.g., lawn care) is not deductible unless you meet with clients in the home office and the landscaping contributes to the professional environment—this is rare. However, if you use your home’s driveway and walkway exclusively for client access, a portion of landscaping may be allocable.

Office Supplies and Equipment

Items like pens, paper, printer ink, and other consumables are fully deductible as ordinary business expenses, not requiring the exclusive use test. Computers, printers, and furniture used exclusively for work are depreciated over several years, but you may be able to deduct them immediately under Section 179 or bonus depreciation if certain conditions are met. Note that if you use a computer partly for personal purposes, you must allocate. Smartphones used for both business and personal calls can be deducted based on business usage percentage, but you need to track minutes or data usage.

Calculating Your Deduction

Simplified Method

For tax years after 2013, the IRS offers a simplified option: deduct $5 per square foot of home office space, up to a maximum of 300 square feet (capped at $1,500). This method is easy but does not allow you to carry forward unused deductions. You cannot also deduct actual mortgage interest or property taxes as home office expenses—those must be claimed separately as itemized deductions. The simplified method may be best if your actual expenses are low or you want to avoid complex calculations. It also avoids recapture of depreciation when you sell your home, because no depreciation is claimed.

Regular Method

Under the regular method, you compute the business‑use percentage of your home (office square footage divided by total square footage). Then you apply that percentage to your indirect expenses. You must also track direct expenses separately. This method can yield a larger deduction if your home expenses are high, but it requires more recordkeeping and adds complexity. It also allows you to claim depreciation on the portion of your home used for business, which recaptures income when you sell the home (subject to non‑qualified use rules). Many taxpayers find the regular method more beneficial when mortgage interest and property taxes are substantial, or when the office occupies a large percentage of the home.

Depreciation

If you use the regular method, you can deduct a portion of the home’s adjusted basis (excluding land) as depreciation. This is recovered over 39 years for commercial use of a home. However, take care: when you sell your home, the depreciation claimed (whether you actually deducted it or not) is taxed as ordinary income up to 25% recapture. New rules under the Tax Cuts and Jobs Act (TCJA) may also limit depreciation on business use of a residence, so consult a tax professional. If you have used the home office for only a few years, the recapture amount is usually small, but it can become significant over decades. Consider whether the current tax savings outweighs the future tax upon sale. Also note that if you convert your home office back to personal use, you must stop taking depreciation but the basis remains reduced.

Special Rules for Employees vs. Self‑Employed

The rules differ dramatically. Self‑employed individuals (including gig workers, freelancers, and independent contractors) can deduct home office expenses on Schedule C (or Schedule F for farms). Employees working from home used to be able to claim unreimbursed employee expenses on Schedule A (subject to 2% AGI floor), but the TCJA eliminated that deduction for tax years 2018 through 2025. Therefore, most employees cannot deduct home office expenses unless they are in a very narrow category: armed forces reservists, qualified performing artists, fee‑based state/local government officials, or employees with impairment‑related expenses. For the average remote employee, claiming a home office deduction is not allowed on their federal return unless they have business income from self‑employment.

If you are both an employee and self‑employed, you must allocate expenses appropriately. Only the self‑employed portion qualifies for the deduction. For example, if you use a home office 50% of the time for your side business and 50% for your employer’s work, you can only deduct the business percentage of expenses for the side business. The employee portion is not deductible. Allocation can be based on square footage and time.

Home Office Deduction and Multiple Businesses

Many entrepreneurs run several businesses from one home office. The IRS allows you to combine the income and expenses from all your businesses for the home office deduction, but you must treat the office as used exclusively for all of them. If business A uses the office 50 hours a week and business B uses it 20 hours, together they meet the regular use test. Compute the deduction on a single Form 8829. However, if one business is a sole proprietorship and another is an S‑corporation, the rules become more complex. The S‑corporation may need to reimburse you for home office use, and you must include that as rental income. Consult a tax professional when entities are involved.

State and Local Considerations

While federal rules are standardized, states have their own treatment. Some states conform to the federal disallowance of employee home office deductions; others do not. For example, California allows unreimbursed employee expenses (including home office) on its state return even after the federal deduction expired. Always check your state’s tax authority. Additionally, if you live in a state with high income tax, the deduction could be significant at the state level even if not available federally. For instance, New York, New Jersey, and Minnesota also allow employee business expenses under certain conditions. Be sure to file the appropriate state forms to claim these deductions.

Recordkeeping Best Practices

To defend your deduction in an audit, maintain thorough records:

  • Floor plan or diagram of your home with measurements showing the office area.
  • Utility bills for the entire year to calculate percentages.
  • Rent receipts or mortgage statements.
  • Repair and maintenance invoices clearly indicating which area was serviced.
  • Depreciation schedule if using the regular method.
  • Calendar or log showing regular business use — apps like Toggl or Google Calendar can help.

Use separate bank accounts or credit cards for business expenses whenever possible. Digital photographs of the office can also be helpful. Keep all records for at least three years after filing the return, but longer if you claim depreciation (since the recapture period can extend beyond three years). Consider scanning receipts into cloud storage like Dropbox or a dedicated tax software portfolio.

Recent Changes and Common Mistakes

COVID‑19 and Temporary Telework

The IRS has confirmed that simply working from home temporarily due to the pandemic does not create a “principal place of business” for those who already had a separate office. The temporary telework changes under COVID‑19 did not retroactively allow employee home office deductions. Self‑employed individuals still qualify if they meet the criteria, regardless of the pandemic. However, many employees were misled into claiming the deduction, leading to IRS audits. Always verify your eligibility before claiming.

Frequent Errors

  • Claiming a deduction for a home office that is not used exclusively for business (e.g., family computer corner).
  • Using the simplified method incorrectly (e.g., applying the $5 rate to more than 300 sq. ft.).
  • Double‑counting expenses: you cannot deduct mortgage interest both as a home office expense and as an itemized deduction on Schedule A for the same amount. Allocation is key.
  • Failing to reduce the deduction when the home office is used for part of the year (e.g., starting business mid‑year). The deduction must be prorated for the months of use.
  • Not recapturing depreciation upon sale of home (or incorrectly thinking depreciation is optional). Even if you never claimed depreciation, the IRS may compute recapture based on the allowable depreciation (the amount you could have taken). This can be a nasty surprise when selling a home after years of business use.
  • Claiming the deduction for a home office that is not the principal place of business if you have another fixed location for substantial administrative work.

Tips to Maximize Your Deduction (Legally)

  • Use the regular method if you have high indirect expenses—especially if you own a home with significant mortgage interest and utilities. The simplified method is easier but may leave money on the table. Run both calculations to compare.
  • Track all direct expenses that benefit only the office, as they are 100% deductible.
  • Consider home office deduction limits: The deduction cannot exceed the gross income from your business minus all other business expenses. If your home office deduction would create a loss, carry the excess forward to the next year (regular method only). This can smooth out deductions over low‑income years.
  • Coordinate with your spouse: If you are married and both use the same home office for separate businesses, you can each claim a deduction if the space is shared and exclusive for each business? The IRS allows concurrent use only if each person uses the space exclusively for their own business—difficult if the same desk is used. Better to allocate separate areas or schedule times. Alternatively, one spouse can claim the entire deduction if the other does not qualify.
  • Separate your home office from personal area: Even a defined partition helps demonstrate exclusive use. Avoid storing personal items in the office.
  • Review state rules: Some states have more generous deductions. File a separate state return to claim employee expenses if your state allows it. For example, California allows up to $1,500 of unreimbursed employee expenses even without the home office deduction.
  • Combine with Section 179: If you buy office equipment like a computer or desk, consider expensing it immediately under Section 179 rather than depreciating it. This can increase your current year deduction, but be aware of the business income limitation.
  • Don’t forget the self‑employment tax savings: Every dollar of home office deduction reduces net profit, which lowers both income tax and self‑employment tax (Social Security and Medicare). The effective savings can be 30‑40% depending on your tax bracket.

IRS Resources and Professional Help

The IRS provides Publication 587 (Business Use of Your Home) and the instructions for Form 8829 (Expenses for Business Use of Your Home). For the simplified method, use the worksheet in the instructions for Schedule C or Form 8829 itself. Those with straightforward situations can use tax software, but if you have multiple properties, a home sale, or complex depreciation, consult a certified public accountant or enrolled agent. Mistakes in home office deductions are a frequent audit flag, so accuracy matters more than maximizing every dollar.

For additional guidance, the IRS newsroom often posts updates, and tax preparation companies like Intuit or H&R Block offer calculators. Always verify from official sources rather than relying on anecdotal advice from social media. A good CPA can also help you navigate the interaction between home office deduction and the Qualified Business Income (QBI) deduction under Section 199A, which is based on taxable income after all deductions.

Conclusion

Home office deductions can be a valuable tax break for the self‑employed and, under limited conditions, for certain employees. By understanding the exclusive use and principal place of business tests, tracking expenses carefully, and choosing between the simplified and regular methods, you can reduce your taxable income legally. Keep meticulous records, stay informed of annual tax law changes, and don’t hesitate to seek expert advice when your situation is complex. With the right approach, your home office can become a legitimate source of tax savings. Remember that the deduction is an incentive for running a business from home — it should not be claimed aggressively without proper documentation. Plan ahead, consult a professional, and enjoy the benefits of a well‑structured home office deduction.