If you’re self-employed and run your business from a qualifying home office, you can write off internet when working from home — but only the share you actually use for business, not the whole bill. W-2 employees cannot claim this on their federal return, even if they work remotely full time. The deduction rides on the home office rules under Section 280A, so whether your internet bill is deductible really depends on whether your workspace qualifies in the first place.1Office of the Law Revision Counsel. 26 USC 280A – Disallowance of Certain Expenses in Connection With Business Use of Home, Rental of Vacation Homes, Etc.
Who Can Actually Deduct It
Two tests decide whether your home office qualifies, and both must be satisfied before any internet expense follows.
The first is exclusive and regular use. A specific area of your home has to be used only for business. Not a dining table you also eat at, not a guest room that becomes an office when work calls. The space doesn’t need a door, but it needs a clear boundary, and it can’t do double duty for personal life.2Internal Revenue Service. Topic No. 509, Business Use of Home
The second is that the space must be your principal place of business — where you do your most important work, or where you spend most of your working time. There’s a useful fallback: if you handle administrative tasks like billing, scheduling, and bookkeeping at home and have no other fixed location where you do that work, the office qualifies even if you provide services elsewhere during the day.1Office of the Law Revision Counsel. 26 USC 280A – Disallowance of Certain Expenses in Connection With Business Use of Home, Rental of Vacation Homes, Etc. A room where you regularly meet clients face-to-face also qualifies, as does a detached structure like a garage workshop or backyard studio used regularly for business.2Internal Revenue Service. Topic No. 509, Business Use of Home
Sole proprietors, independent contractors, single-member LLC owners, and freelancers claim the deduction on Schedule C.3Internal Revenue Service. Instructions for Schedule C (Form 1040) (2025) Pass both tests and internet becomes a deductible business expense under either the actual expense method or the simplified method.
Why Remote Employees Can’t Claim It Federally
If you receive a W-2, the federal home office deduction is off the table, even if your employer requires you to work from home. Before 2018, employees could deduct unreimbursed business expenses (including part of home internet) as a miscellaneous itemized deduction subject to a 2% AGI floor. The Tax Cuts and Jobs Act suspended that deduction starting in 2018, and later legislation made the elimination permanent.4Internal Revenue Service. Simplified Option for Home Office Deduction
Two avenues remain. Some states kept their own version of the unreimbursed employee business expense deduction on state income tax returns, so you may still be able to deduct a business share of internet at the state level. Check your state’s department of revenue for current rules.
The cleaner route is reimbursement through your employer’s accountable plan. Payments made under an accountable plan don’t appear on your W-2 and aren’t subject to income or payroll taxes, provided three conditions are met: the expense has a legitimate business connection, you substantiate it with documentation, and you return any amount that exceeds what you actually spent.5Internal Revenue Service. Publication 15 (Circular E), Employers Tax Guide Miss any of those and the IRS treats the reimbursement as taxable wages.6eCFR. 26 CFR 1.62-2 – Reimbursements and Other Expense Allowance Arrangements
Figuring the Business Share of Your Bill
Most households use the same connection for work and personal activity, so you need to allocate. The IRS expects a reasonable, consistent method. Claiming a flat 50% split with nothing behind it is the kind of thing that draws scrutiny.
Tracking hours is the most defensible approach. Log how many hours per month you use the internet for business against total household usage. If the family uses the connection roughly 120 hours a month and 45 of those are work, the deductible share is 37.5%. A simple daily log or time-tracking software is enough.
You can also allocate by users or devices. If four people share the connection and one is a dedicated business user, 25% is a reasonable starting point, though logs showing the business device or account was active during working hours strengthen the position. The IRS doesn’t prescribe a single formula. Pick a method, stick with it, and be ready to explain the math.
One setup skips the allocation entirely. If you maintain a separate internet line used exclusively for business, the full cost is deductible as a direct business expense on Schedule C. That’s uncommon in a home, but if you’ve installed a dedicated line for work, no allocation is needed.
Two Ways To Claim the Deduction
The Actual Expense Method
Under the actual expense method, you apply your business-use percentage to the internet bill, then combine it with other home office expenses on Form 8829. The result flows to Schedule C, Line 30.7Internal Revenue Service. Instructions for Form 8829 (2025)3Internal Revenue Service. Instructions for Schedule C (Form 1040) (2025)
Internet is an indirect expense: it benefits the whole home, not just the office. Indirect expenses get allocated on Form 8829 alongside rent or mortgage interest, property taxes, homeowner’s insurance, general repairs, and utilities, which are split based on office square footage as a percentage of total home area.8Internal Revenue Service. Publication 587 (2025), Business Use of Your Home For internet specifically, apply your usage-based business percentage rather than square footage, because square footage doesn’t describe how the connection is actually used.
This method takes more paperwork but almost always produces a larger deduction than the flat rate, especially for people with high housing costs or large office spaces.
The Simplified Method
If tracking every expense sounds like more trouble than the deduction is worth, the IRS offers a flat alternative. You claim $5 per square foot of home office space, capped at 300 square feet, for a top deduction of $1,500 per year.9Internal Revenue Service. FAQs – Simplified Method for Home Office Deduction The rate has not changed since 2013.
That $1,500 ceiling covers everything: utilities, insurance, depreciation, rent, and internet. You cannot layer any of those on top separately. You also cannot carry forward unused deductions under this method.2Internal Revenue Service. Topic No. 509, Business Use of Home
The tradeoff is speed against size. The simplified method drops Form 8829 entirely, but anyone with real expenses above $1,500 leaves money behind. If your internet alone runs $100 a month and you also have significant housing costs, the actual expense method will almost certainly win. You can switch methods year to year, so run both before you file.
S-Corporation Owners
If you operate through an S-corp, you’re treated as an employee of your own company, which means you cannot claim the home office deduction directly on your personal return the way a sole proprietor can. The workaround is having the corporation reimburse you for home office expenses, including internet, under an accountable plan.
You submit an expense report documenting square footage, actual costs, and business use. The corporation pays you and deducts the payment as a business expense. On your side, the reimbursement is tax-free, staying off your W-2 and outside payroll taxes.5Internal Revenue Service. Publication 15 (Circular E), Employers Tax Guide The same three requirements apply: business connection, substantiation, and return of excess. Miss any and the IRS reclassifies the payment as taxable wages.6eCFR. 26 CFR 1.62-2 – Reimbursements and Other Expense Allowance Arrangements
Routers, Modems, and Other Equipment
The monthly bill isn’t the only cost you can write off. Routers, modems, mesh systems, and similar hardware used for business may qualify for immediate expensing under the Section 179 election, which lets you deduct the full business-use portion in the year you buy it rather than depreciating over several years.10Internal Revenue Service. Publication 946, How To Depreciate Property You must use the equipment more than 50% for business in the year you place it in service, and you multiply the cost by your business-use percentage to get the deductible amount.
For smaller purchases, the de minimis safe harbor election lets you deduct items costing $2,500 or less per item without capitalizing or depreciating at all. Most home networking equipment fits well within that threshold. The election is made by including a statement on your return for the year of purchase.
The Catch When You Sell Your Home
Most people don’t think about this part until closing day. If you claimed depreciation on your home under the actual expense method, the IRS wants some of that benefit back when you sell.
Normally, Section 121 lets you exclude up to $250,000 in capital gains ($500,000 married filing jointly) on the sale of a primary residence. If your home office was inside the house rather than a separate structure, you don’t have to split the sale between business and personal portions. But you cannot exclude the portion of gain equal to the total depreciation you claimed (or were entitled to claim) after May 6, 1997.11Internal Revenue Service. Selling Your Home
That recaptured depreciation is taxed as unrecaptured Section 1250 gain at a maximum rate of 25%, higher than the long-term capital gains rate most homeowners pay.12Internal Revenue Service. Topic No. 409, Capital Gains and Losses A decade of home office depreciation can add up. Factor this in when weighing the actual expense method (which includes depreciation) against the simplified method (which does not).
What Happens If the IRS Challenges You
The home office deduction has long attracted audits, and sloppy internet allocation is one of the easier targets. If you can’t produce records showing how you calculated the business percentage, the IRS can disallow not just the internet portion but the entire home office deduction if the underlying qualification is in doubt.
Beyond losing the deduction, you face a 20% accuracy-related penalty on any underpayment caused by negligence or a substantial understatement of income.13Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments Interest runs on top of that from the original due date.
Keep records for at least three years from the date you file, which is the standard audit window. If you significantly underreport income (by 25% or more), it stretches to six years.14Internal Revenue Service. How Long Should I Keep Records15Internal Revenue Service. Time IRS Can Assess Tax Your documentation for the actual expense method should include monthly internet invoices, usage logs showing the business-versus-personal split, square footage measurements for the office and total home, and receipts for other home expenses in the deduction. The simplified method doesn’t require expense receipts, but you still need to document square footage and be able to show the space meets the exclusive and regular use test.
The best protection is unglamorous. Keep logs current, save the bills, and don’t inflate the business percentage. If 30% is honest, claim 30%.