S corp owners can't take the home office deduction personally and can't usefully rent to their corporation. The right move: an accountable-plan reimbursement. Here's the math.
If you run your business from home as an S corporation owner, the home office deduction you keep hearing about isn't yours to take — at least not the way sole proprietors take it. The right answer is different and, done properly, just as good: your corporation reimburses you for the business-use share of your home costs through an accountable plan. The reimbursement is tax-free to you and deductible to the corporation.
This post explains why the two obvious routes — deducting it personally, or renting your office to your corporation — don't work for S corp owners, and then walks the reimbursement math step by step. It assumes your compensation setup is already sound; if you haven't nailed down reasonable salary yet, start there, because the home office reimbursement sits on top of a correctly run payroll, not instead of it.
The home office deduction — the one with the simplified $5-per-square-foot option — belongs to self-employed people filing Schedule C. The moment you elected S corp status, you stopped being self-employed for this purpose. You're an employee of your corporation, and employees currently have no personal deduction for unreimbursed job expenses, home offices included. Put the home office on your 1040 as an S corp owner and you're claiming a deduction that isn't available to you.
Full home-office mechanics — exclusive use, regular use, the simplified method — live in our home office deduction guide, and they still matter here, because the reimbursement route borrows the same qualification rules. But the claiming mechanism is completely different.
The next idea everyone has: "Fine, I'll charge my S corp rent for the office." You can — the corporation deducts the rent and you report rental income. But Section 280A slams the door on the good part: when you rent part of your home to your employer and use it in your work as an employee, you're barred from deducting the expenses attributable to that rental — the utilities, insurance, and upkeep that would normally offset rental income. You end up with fully taxable rent to you, no offsetting deductions, and a corporate deduction that just moved income from one of your pockets to the other with extra tax friction. It converts a potential tax-free benefit into taxable income. Skip it.
Deducting personally: not allowed. Renting to your corporation: taxable with no offsets. Reimbursement through an accountable plan: tax-free to you, deductible to the corporation. There's one right door.
An accountable plan lets your corporation reimburse you for business expenses you incur personally — tax-free, provided there's a business connection, timely substantiation, and return of any excess. Your home office is a business expense you incur personally: the corporation uses part of your home, and you're footing the bill. So the corporation reimburses you for the business-use share of actual home costs.
The result:
Compute it like the actual-expense method. Note the simplified $5-per-square-foot shortcut is a Schedule C convenience — for reimbursements, use real numbers.
For homeowners, mortgage interest and property taxes add a wrinkle: you may already be deducting them on Schedule A, and you can't get the same dollar twice — if the corporation reimburses a share, that share comes off your itemized deduction. Depreciation on the home adds another layer with long-term consequences when you sell. Many owners keep the reimbursement to the clean categories — utilities, insurance, repairs, HOA — and leave interest, taxes, and depreciation out. If your numbers are big enough that depreciation matters, that's a conversation to have with your preparer, not a template decision.
Reimbursement doesn't relax the qualification standards — it inherits them:
The file you want to be able to produce, per year:
Fold the home office line into the same monthly expense report you use for mileage and phone, and the whole thing takes ten extra minutes a month. What you're building is the answer to the only audit question that matters: can you tie every reimbursed dollar to a measured space and an actual bill?
Take the 10% example with $3,400 a month of rent, utilities, and insurance: $4,080 a year moves from the corporation to you with zero tax on your side, and the corporation's taxable income drops by $4,080. If the corporation's profit would otherwise flow to you at a combined federal-plus-state marginal rate in the 30s, that's over $1,200 a year in real savings — recurring, every year you work from home — for one measurement and twelve short worksheets. Few tax moves pay better per unit of effort.
S corp owners don't deduct the home office and shouldn't rent it to their corporation — they get reimbursed for the business-use percentage of actual home costs through a written accountable plan, tax-free in, fully deductible to the company. Measure the space, run the percentage against real bills monthly, and keep the file. Taxagon's CPAs and EAs build home-office reimbursements into S corp tax filings for owner-operators every season — if you've been leaving this one on the table, reach out.
This article is general information, not tax advice for your specific situation. Tax law changes; figures are for the years stated.
Talk it through with a licensed US tax professional — we'll tell you honestly whether it applies to your situation.
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