Home office deduction explained: simplified vs actual

Updated 2026-09-02

The home office deduction comes in two flavours, and most freelancers pick the wrong one by default. Here is how they differ and when each wins.

Two methods, one space

If you work from home, the IRS lets you deduct the business use of your home — but it offers two ways to do it, and they are not interchangeable. The simplified method is $5 per square foot of office, up to 300 square feet, for a maximum of $1,500. The actual method deducts the real business percentage of your rent or mortgage interest, property tax, utilities and insurance, plus 100% of office-only costs. The right choice depends almost entirely on your rent and the size of your workspace.

Why the actual method often wins

The simplified method's $1,500 ceiling is generous only for a very small, low-cost office. In any expensive rental market, the actual method usually beats it by a wide margin. A 150 sq ft office in a $2,400-a-month apartment is 10% of the home; 10% of that rent alone is about $2,880 a year, before a single utility is added. The simplified method would hand you $750 for the same space. That is real money left on the table for the sake of a simpler form.

The crossover sits roughly where your annual indirect expenses for the business share exceed $15,000. Below that, simplified is fine and far less paperwork. Above it, actual pays for the extra record-keeping many times over.

The 300 square foot trap

This is the detail people miss in the simplified method. The $5 rate applies only to the first 300 square feet. A freelancer with a 400 sq ft studio gets exactly the same $1,500 as someone with a 300 sq ft room — the extra space is simply ignored. If you have that much workspace, you almost certainly want the actual method, because only it can capture the real cost above the cap.

What the deduction is actually worth

Remember it is a deduction, not a refund. Its value is the deduction times your marginal tax rate. At a 22% federal bracket, a $3,000 actual-method deduction is worth about $660 in federal tax, and a bit more if your state also taxes you. Some states even let you deduct it on the state return when you used the federal simplified method — worth checking, because it is free money the calculator's main line does not show.

Two things the method leaves out. Mortgage interest and property tax may also be itemized on Schedule A — you cannot double-count them, so the home office deduction uses the business share and you claim the rest separately if you itemize. And the actual method requires Form 8829; once you claim depreciation, it can create a small taxable gain when you sell the home. That is the main reason some people deliberately pick the simplified method despite the smaller deduction.

Qualifying in the first place

None of this matters unless the space qualifies. The test is "regular and exclusive" business use. A dining-table corner you also eat at does not count. A room with a desk that is also where the dog sleeps does not count. The space has to be used only for work, consistently — not just during a busy week. This is the most common home office audit trigger, which makes the simplified method's chief virtue that it attracts less attention.

Run your own numbers through the home office deduction calculator before you file. The two methods can differ by thousands, and the choice is made fresh every year, so there is no penalty for switching when your situation changes.