The Home Office Deduction: What Actually Qualifies and How to Claim It

By Matthew Gorrell, AFC®, ChFC® · 5 min read

The home office deduction is one of the most valuable write-offs available to self-employed people — and one of the most misunderstood. There are two ways to calculate it, and the choice you make has tax consequences that can follow you years down the road when you sell your home.

Here's what qualifies, how each method works, and what you need to know before you pick one.

What Actually Qualifies

The IRS has two firm requirements for a home office deduction. First, the space must be used for business on a regular basis. Occasional use doesn't count. Second — and this is where most people run into trouble — it must be used exclusively for business.

That means a dedicated room or clearly defined area used only for work. A kitchen table where you also eat breakfast doesn't qualify. A desk in the corner of your bedroom where you also watch TV doesn't qualify. A spare room with a desk, filing cabinet, and nothing else? That qualifies.

You don't need a separate room, but you do need a space you can define and defend. Measure it. Know the square footage. Keep a photo if it helps.

What about remote employees?

If you're a W-2 employee working from home, you generally can't claim the deduction at all. The 2017 tax law suspended the deduction for unreimbursed employee expenses, and the 2025 tax law made that permanent. The home office deduction is for self-employed people, sole proprietors, and other business owners.

Method 1: The Simplified Method

The simplified method is exactly what it sounds like. You multiply the square footage of your home office by $5, up to a maximum of 300 square feet. The most you can deduct using this method is $1,500 per year.

The math is easy. There's no depreciation to track. You don't need to calculate the percentage of your home used for business. And when you sell your home, there are no depreciation recapture consequences — more on that in a moment.

The trade-off: for many people, $1,500 is significantly less than the actual expense method would produce. If your home office is large or your housing costs are high, you may be leaving real money on the table.

Method 2: The Actual Expense Method

The actual expense method bases your deduction on the percentage of your home used for business — your office square footage divided by your home's total square footage. That percentage then applies to your actual home expenses.

Deductible expenses include mortgage interest, property taxes, rent, utilities, homeowner's insurance, repairs, and depreciation. If your office takes up 15% of your home's square footage, you can deduct 15% of each of those costs.

For most people with meaningful housing costs, this method produces a larger deduction. But it requires more documentation — receipts, utility bills, insurance statements — and it introduces a tax issue you need to understand before you commit to it.

The Depreciation Issue — Read This Before You Choose

When you use the actual expense method on a home you own, part of your deduction is depreciation. The IRS requires you to depreciate the business portion of your home over 39 years, deducting a small amount each year.

Here's the part most people miss: when you sell your home, the IRS recaptures that depreciation. Even if you forgot to claim it in a year you used the actual expense method, the IRS treats it as if you did — a concept called “allowed or allowable” depreciation. The recaptured amount is taxed at ordinary income rates, up to a maximum of 25%, and it can't be sheltered by the home sale exclusion.

Run both calculations before you choose a method.

This doesn't mean the actual expense method is wrong. In many cases the deductions over the years outweigh the recapture cost at sale. But the recapture can be a surprise if you don't plan for it — especially if you've used the home office deduction for many years.

If you use the simplified method, there's no depreciation deduction for those years and therefore no depreciation recapture for them at sale. That's a meaningful advantage if you plan to sell your home and want a clean transaction.

Which Method Should You Use?

Run both calculations before you decide. The simplified method caps at $1,500. The actual expense method has no fixed cap and often produces a larger deduction — but comes with recordkeeping requirements and future recapture risk.

If you rent, the actual expense method is almost always better. You don't own the home, so there's no depreciation and no recapture risk. You can deduct a percentage of your rent, utilities, and renter's insurance with no downside.

If you own and plan to sell within a few years, consider whether the recapture on sale offsets the annual deduction benefit. The longer you use the actual expense method, the more depreciation you'll have to recapture.

If you own and don't plan to sell anytime soon, the actual expense method usually wins on pure math — especially if your housing costs are high.

A Few Other Things Worth Knowing

You can switch methods year to year. Using the simplified method one year doesn't lock you in. But if you switch from actual to simplified after depreciating your home, you'll still face recapture on the depreciation already claimed.

Neither method can create a business loss. If your business income is $800 and your home office deduction would be $1,500, you can only deduct $800 this year. Under the actual expense method, the unused amount carries forward to future years. Under the simplified method, it doesn't.

Keep documentation for as long as you own the home and for at least three years after you file the return for the year you sell it. Depreciation records from a home office can matter years after you've stopped using one.

Get the Deduction Right

The home office deduction rewards people who use it correctly and creates headaches for people who claim it loosely or don't track their numbers. If you work from home and aren't sure which method makes sense for your situation — or whether you qualify at all — that's worth a conversation before you file.