Home Office Tax Deduction: Which Expenses Can You Claim

Self-employed people can generally claim a home office tax deduction when they use part of their home regularly and exclusively for business. The simplified method lets you deduct $5 per square foot of business use, up to 300 square feet, according to the Internal Revenue Service. Eligibility depends on how you use the space, not just whether you work from home.

The rules can seem simple until you need to show which part of your home is used for business and how you calculated the expenses. Keeping clear records as you work makes it easier to support your claim.

This article explains who may qualify, the business-use rules, and which home expenses may be deductible under the simplified or regular method. It also covers records that can support your claim, including expense receipts and notes documenting how you use your workspace.

Key Takeaways

• Separate business-use space from personal areas and understand how regular, exclusive use affects eligibility.
• Compare the simplified and regular methods to see how each treats workspace area and home-related costs.
• Sort expenses into direct and indirect costs so you can understand how each may affect your deduction.
• Keep receipts and a log of business use to create a clearer record of your workspace and expenses.

Table of Contents

• Exclusive and regular business use
• What is the home office deduction?
• Direct and indirect home office expenses
• Recordkeeping for a home office deduction
• Timebook

Exclusive and regular business use

The home office tax deduction generally requires regular, exclusive business use of a defined area. The space must also meet a qualifying business-use test.

Exclusive Workspace Use

Exclusive use means using the workspace only for business, not personal activities. A desk in a bedroom may qualify if that specific area is reserved for work. Using the same desk for personal tasks, even occasionally, can break the exclusive-use test. A physical partition isn’t always necessary: a clearly defined portion of a room can qualify if you measure only the area used for business. Separate structures, such as a detached studio, must also be used exclusively and regularly for business.

Principal Place of Business

Your home can qualify as your principal place of business if you use it regularly for administrative or management activities and have no other fixed location for those duties. It may also qualify when you meet clients or customers there. The test concerns how you conduct your business, not simply where you spend the most hours. A W-2 employee generally can’t claim the deduction under the rule described for tax years beginning after 2017. Self-employed work and employee work have different eligibility rules.

Business-Use Percentage

Calculate the business-use percentage by dividing the office’s square footage by the home’s total square footage. For example, a 300-square-foot office in a 2,000-square-foot home represents 15% business use. A 144-square-foot workspace in a 2,200-square-foot home represents 6.5%. Measure the area used exclusively for business, even if it occupies only part of a room. This percentage helps allocate indirect home expenses under the actual-expense method.

To calculate the actual-expense home office deduction, multiply eligible indirect expenses by the business-use percentage, then add eligible direct office expenses. For shared household costs, apply the percentage; count expenses specific to the office separately.

Keep business supplies and other office expenses separate from home costs. Work supplies, for example, may be ordinary business expenses rather than costs allocated by the home’s square footage. A receipt and a note explaining the business purpose help distinguish them from personal purchases. A deduction reduces taxable income; it isn’t a tax credit.

What is the home office deduction?

This federal deduction lets eligible business owners deduct qualifying costs for using their homes for business. The simplified method uses workspace area, while the regular method accounts for actual expenses and depreciation.

Home Depreciation Methods

The simplified method uses a set amount based on business-use space, rather than actual home expenses. According to the Internal Revenue Service, the deduction is $5 per square foot of business use, calculated for no more than 300 square feet. The simplified option does not allow a home depreciation deduction for years it’s used. That distinction matters if you’re comparing methods: the regular method may include depreciation, but also requires tracking actual home expenses.

Home Cost Basis and Depreciation

Cost basis is the home’s value used to calculate depreciation, with land excluded from the depreciable portion. Under the regular method, the business-use portion of the home’s basis is depreciated over 39 years as non-residential property. This reduces basis over time and can affect tax calculations when you sell. The simplified method avoids home depreciation for the years used, so method choice can shape later reporting.

Employee and Renter Eligibility

Renters may qualify for the home office deduction if their workspace meets the business-use tests; ownership isn’t required. W-2 employees generally can’t claim this deduction for tax years beginning after 2017. Eligibility for people with both employee wages and self-employment income can depend on their self-employment activity. Eligibility follows the business activity and use of the space, not mortgage interest or homeowner status.

Claiming the Deduction on Tax Forms

Form 8829 is used to calculate the deduction, according to the Internal Revenue Service. Under the regular method, the result is reported on Schedule C. Common errors include counting personal space, using unsupported expense amounts, or miscalculating the business-use share. Keep receipts and a log of workspace use; daily planner notes can help document business activity if the return is audited. A business owner should also retain records supporting depreciation and method selection.

For the simplified method, apply the square-foot rate within the area limit. For the regular method, allocate indirect costs by business-use share and include eligible direct costs. Under either method, the home office deduction cannot exceed gross income from business use of the home, less business expenses.

Direct and indirect home office expenses

The regular method separates costs specific to the office from shared household expenses. Your business-use percentage determines how much of the shared costs may count.

Utilities, rent, mortgage interest, insurance, repairs, maintenance, and depreciation may qualify under the regular method. Direct office costs may be deducted in full, while indirect household costs are allocated by business-use percentage. The simplified method replaces actual home costs with a square-foot calculation, so you can’t also deduct separate utility costs using that method.

Qualifying Home Office Expenses

Direct expenses benefit only the workspace, while indirect expenses relate to the whole home. A $100 repair to an office window is an example of a direct expense that may be fully deductible. A roof repair benefits the home generally, so only the business-use share may count. This distinction helps keep office-specific costs separate from expenses shared with personal activities.

Deductible Home Expenses

Under the regular method, shared costs such as utilities, rent, and mortgage interest are generally apportioned using the workspace’s share of total square footage. For example, a 15% business-use share applied to $7,000 in indirect expenses produces a $1,050 deduction. Painting the office for $500 adds a direct cost, bringing that example’s total to $1,550. The simplified method doesn’t allow separate deductions for home costs such as utilities.

Telephone costs have a specific rule: the first line in the home generally isn’t deductible, except for long-distance business calls. An additional line used exclusively for business may qualify. Keep business and personal purposes distinct when recording phone and other office expenses.

Expense Documentation

Keep receipts, invoices, and bills that identify each cost and its business purpose. Note whether an expense applies only to the office or to the whole home, since this determines whether it is treated as a direct or indirect cost. A daily planner log can also document office use if your deduction is reviewed. Match each recorded amount to its bill, then retain the square-footage calculation used to allocate shared expenses.

Recordkeeping for a home office deduction

Good records connect your workspace, business activity, and claimed expenses. A dated log, floor-area calculation, and organized receipts help explain how you calculated the deduction if your return is audited.

Organize your records by category so each item supports a specific part of your claim:

• Workspace use: Record work dates and activities in a daily planner or digital log.
• Square footage: Save the measurements for the office and the total home area used to calculate the business-use share.
• Home expenses: Keep utility bills, rent statements, mortgage-interest records, and repair invoices together.
• Direct costs: Label office-only purchases or repairs with their business purposes.

A dated entry should identify the work you did, such as preparing invoices or managing business accounts. This helps show how the space serves as a place of business, rather than relying on a general note that you worked from home. Keep the log consistent with your calendar and business records. A daily planner can help document home-office time and business use if your deduction is examined.

For each expense, retain the original bill and note whether it applies to the whole home or only the office. For example, a whole-home utility bill supports an indirect cost, while an invoice for an office-only repair supports a direct cost. Keep the related square-footage calculation with these records so you can follow the allocation later.

Reconcile the deduction with business income and expenses before filing. It cannot exceed gross income from business use of the home, less business expenses. If expenses exceed that limit under the regular method, your records can also support a carryforward. The simplified method does not allow unused business losses to carry forward.

Organize business records alongside your time and income entries, so the figures used for tax reporting stay easier to trace.

Timebook

Timebook helps freelancers organize business activity and financial records alongside home-office documentation. Free Time Tracking lets you record work time, while Timebook Pro combines time tracking with invoicing and accounting features.

Use time records to support your account of business activity, and bookkeeping records to organize business income and expenses. These records don’t replace workspace measurements, receipts, or tax forms, but they can make your business finances easier to review when preparing tax information.

If you want one place for freelance time tracking, invoicing, and bookkeeping, explore the option that fits your workflow. Contact Timebook to discuss how it can support your business recordkeeping.

Make recordkeeping part of your routine

A home office tax deduction is easier to support when your records keep pace with your business activity. Make documentation part of your routine instead of leaving it until filing time. Keep calendar notes, expense records, and workspace measurements organized so each amount has context and can be traced to its purpose.

Your next step is to choose a recordkeeping routine you can maintain. Consistent records help separate business activity from personal spending and preserve the details behind your calculations. They can also give you a clearer view of how work time, income, and expenses fit together. Software records can support your process, but they don’t replace the documentation required for tax reporting.

If you’d like to discuss how Timebook could fit your workflow, contact Timebook to discuss your needs. A steady routine can make your business records easier to manage, one workday at a time.

Frequently Asked Questions

Can you claim the deduction if you've been self-employed for a few months?

Yes, a short period of self-employment does not by itself prevent a claim. You must still meet the home-use and business-purpose requirements for the period you operated. Keep records showing when the business began, when you used the workspace, and which expenses relate to that activity. If you also had W-2 employment, the deduction applies only to qualifying self-employment activity.

What expenses does the IRS disallow?

Personal expenses and costs unrelated to qualifying business use of the home aren’t deductible as home-office expenses. Under the simplified method, you can’t separately deduct home costs such as utilities. The first telephone line in a home generally isn’t deductible, except for long-distance business calls; an additional line used exclusively for business may qualify. Keep personal and business charges separate in your records.

Who qualifies for the home office tax deduction in the U.S.?

Self-employed people, side-gig workers, and farm owners may qualify if their home workspace meets the applicable use tests. Homeowners and renters can both be eligible. A W-2 employee generally can’t claim the deduction, but someone with both wages and self-employment income may qualify for the self-employment activity. A qualifying home daycare or dedicated inventory-storage area can follow different exclusive-use rules.

What are the IRS exclusive-use and regular-use requirements for a home office?

The workspace generally must be used regularly and exclusively for business, so a room that also serves as a guest bedroom usually fails the exclusive-use test. A portion of a room can qualify if the business area is clearly defined and only that area is counted. Qualifying daycare use or dedicated inventory storage may be exceptions to the exclusive-use requirement.

What is the simplified home office deduction rate and maximum amount?

The simplified method allows $5 per square foot of business use, for no more than 300 square feet. That sets a maximum deduction of $1,500. For example, a qualifying workspace smaller than the area limit uses its measured business square footage in the calculation. The method replaces actual home-expense calculations, so don’t add separate home costs such as utilities to the simplified deduction.

How do you determine the business-use percentage of a home?

Divide the square footage used for qualifying business activity by the home’s total square footage, then express the result as a percentage. Include only workspace that meets the business-use rules, not nearby personal-use space. For an irregular layout, measure the defined office area consistently and keep the measurements with your records. Use the resulting percentage to allocate eligible indirect home expenses under the regular method.