The IRS allows two ways to deduct home office expenses: the simplified method and the regular method

The simplified method lets you deduct $5 per square foot of home office space, up to 300 square feet (a maximum deduction of $1,500 per year). You do not need to track receipts or calculate actual expenses. You simply measure your office, multiply by $5, and claim that amount on Schedule C.

The regular method requires you to calculate the actual percentage of your home used for business, then deduct that same percentage of your real mortgage interest or rent, utilities, insurance, repairs, and depreciation. This method produces a larger deduction for most people but demands detailed record-keeping and more complex math on Form 8829.

You can switch between methods year to year, but once you use the regular method, switching back to simplified in later years triggers depreciation recapture — a tax bill on the gain in your home's value. Most people who start with regular stay with regular.

Key Takeaways

  • The simplified method costs no record-keeping and caps out at $1,500 per year; the regular method requires tracking actual expenses but usually produces a larger deduction.
  • Your home office must be used regularly and exclusively for business — a desk in a bedroom you also sleep in does not may have access to.
  • If you are self-employed, you claim home office deduction on Schedule C; if you are an employee, you cannot claim it at all (with rare exceptions for military).
  • The regular method requires you to calculate what percentage of your home's square footage is office space, then apply that percentage to mortgage interest, utilities, insurance, and repairs.
  • Switching from regular method to simplified method in a later year triggers a depreciation recapture tax, so most people stay with whichever method they choose first.

What "regular and exclusive use" actually means

The IRS requires that your home office space be used regularly and exclusively for business. "Exclusively" means you cannot use the space for personal purposes — a guest bedroom that doubles as an office does not may have access to, even if you use it for business most of the time. The space must be dedicated to work only.

"Regularly" means you use it consistently, not once or twice a month. The IRS does not publish a minimum number of hours per week, but the intent is clear: the space must be your actual workplace, not a theoretical one. If you work from home three days a week and an office the other two, your home office still counts as regular use.

The space does not have to be a separate room. A corner of your basement, a defined area in a garage, or a section of your living room can may have access to if it is physically separated and used only for business. What matters is that you can point to a specific area and say "this is where I work," and no one else uses it for anything else.

How to calculate the regular method deduction

Start by measuring the square footage of your home office and your entire home. Divide office square footage by total square footage to get your business-use percentage. If your office is 200 square feet and your home is 2,000 square feet, your percentage is 10 percent.

Next, gather your actual home expenses for the year. These fall into two categories: direct expenses (costs only for the office, like office paint or a new desk) and indirect expenses (costs for the whole home that you split by percentage, like mortgage interest, property tax, utilities, insurance, repairs, and depreciation). You do not deduct the full amount of indirect expenses — only your business-use percentage.

On Form 8829, you list all indirect expenses, multiply each by your business-use percentage, then add them together. You also add direct expenses at full value. The total is your home office deduction. Keep receipts, utility bills, mortgage statements, and repair invoices for at least three years in case the IRS asks.

Who can claim a home office deduction

You must be self-employed or a business owner to claim a home office deduction. If you are a W-2 employee, you cannot deduct home office expenses, even if your employer requires you to work from home. This rule applies to most remote workers — your employer's requirement does not change your tax status.

The only exception is military personnel on active duty who are required to live off-base. They can claim a home office deduction for the portion of their home used for military work.

If you are self-employed as a freelancer, consultant, contractor, or small business owner, you can claim the deduction. The same applies if you have a side business separate from your main job — the home office must be used for that business, and you report it on Schedule C.

Depreciation and what happens when you sell

When you use the regular method, the IRS treats part of your home as a business asset and requires you to depreciate it — claim a deduction for its declining value over time. This is where the regular method gets complicated: depreciation recapture means that when you sell your home, you owe tax on the depreciation you claimed, even if your home actually went up in value.

The simplified method avoids this problem entirely. You never claim depreciation, so you never owe recapture tax. This is one reason many home-based business owners prefer it, even though the regular method usually produces a larger annual deduction.

If you have used the regular method for several years and then switch to simplified, you still owe recapture tax on all the depreciation you claimed in past years. The IRS does not forgive it just because you stopped claiming it. This makes switching back to simplified a costly move, which is why most people stay with their original choice.

What expenses you can and cannot deduct

You can deduct mortgage interest (or rent), property tax, utilities, internet, phone (business portion only), insurance, repairs, maintenance, office supplies, furniture, and equipment. You can also deduct a portion of services like cleaning or lawn care if they benefit the whole home.

You cannot deduct the principal portion of your mortgage (only interest), capital improvements to your home (like a new roof or addition), or personal expenses. Meals, commuting costs, and vehicle expenses do not count as home office deductions — they are separate categories with their own rules.

Internet and phone are common gray areas. If you use them partly for business and partly for personal use, you can deduct only the business portion. Many people estimate this as 50 percent or higher if they work from home full-time, but keep a record of how you calculated it in case the IRS asks.

Record-keeping and what to save

For the simplified method, you need only your measurement of the office space and the calculation (square footage × $5). The IRS rarely audits simplified method claims, and the documentation burden is minimal.

For the regular method, keep receipts, invoices, and statements for every expense you claim: utility bills, mortgage statements, insurance policies, repair invoices, and property tax bills. Organize them by category and year. The IRS can ask for these records up to three years after you file, and sometimes longer if they suspect underreporting.

Take a photo of your home office when you first claim the deduction, showing the dedicated space and its dimensions. This protects you if the IRS questions whether the space truly qualifies as exclusive business use. Update the photo if you make significant changes to the space.

Frequently Asked Questions

Can I deduct home office expenses if I am an employee working from home?

No. W-2 employees cannot deduct home office expenses, regardless of whether their employer requires remote work. Only self-employed people, business owners, and active-duty military can claim this deduction. If you are unsure of your employment status, check your tax forms — a 1099 means you are self-employed; a W-2 means you are an employee.

What if I use one room for both an office and a guest bedroom?

You cannot deduct it. The IRS requires exclusive use, meaning the space must be used only for business. A room that serves dual purposes does not meet this test. If you have a separate office space elsewhere in your home, you can deduct that instead.

Do I have to use Form 8829 if I choose the simplified method?

No. The simplified method uses a simpler form or worksheet. You calculate your deduction (square footage × $5) and report it directly on Schedule C. You do not need Form 8829 unless you use the regular method.

If I switch from regular method to simplified method, what happens to my past depreciation?

You owe depreciation recapture tax on all the depreciation you claimed in prior years. The IRS treats this as income in the year you switch methods. This is why most people stay with their original method — switching is expensive and usually not worth it.

Can I deduct my internet bill as a home office expense?

Only the business portion. If you use internet for both work and personal use, estimate what percentage is business-related and deduct that amount. Many full-time remote workers claim 50 to 75 percent, but you should be able to explain your calculation if audited.