The most common mistake agents make is reporting only the net commission they actually received. If a deal pays $15,000 gross and your brokerage takes a 30% split, you might be tempted to just report $10,500 as income. Don’t do that. Your brokerage sends a 1099-NEC to the IRS showing the full $15,000, and if your Schedule C only shows $10,500, you’ve created a mismatch that can trigger an IRS notice.

Report the full gross commission amount on Schedule C line 1 (Gross receipts). Then deduct the brokerage’s portion as a commission and fees expense on line 10. The math works out the same for your taxable income, but now your return matches what the IRS already has on file from your 1099.

Track every split per transaction throughout the year. For each closing, record the gross commission earned, the split percentage or dollar amount your brokerage kept, and the net you received. A simple spreadsheet works, but keeping this in your accounting software is better because it feeds directly into your books and your tax return. If you work with a bookkeeper who understands real estate, they can set this up so each transaction is recorded correctly from the start.

Your other business expenses get deducted separately on Schedule C. MLS dues, E&O insurance premiums, lockbox fees, marketing and advertising costs, continuing education, business cards, staging expenses, and professional photography all go on their respective expense lines. Don’t lump them into the commission expense line. Keep them separate for cleaner reporting.

Mileage is usually one of the largest deductions for agents. Driving to showings, open houses, inspections, and client meetings all qualifies. Track every business mile with an app because the IRS will want documentation if they ask. The standard mileage rate adds up fast when you’re driving across the Valley all day.

If your brokerage charges desk fees, transaction fees, or franchise fees on top of the commission split, those are separate deductible expenses too. Some brokerages charge a flat monthly fee instead of or in addition to a split. However they structure it, every fee your brokerage charges you is deductible as long as you can document it.

The key principle is that the IRS wants to see your gross income and your expenses listed out individually. They don’t want you doing the math for them by only reporting what hit your bank account. This applies to construction job costing in Phoenix the same way it applies to real estate. Gross revenue goes on top, costs come out below, and you can see exactly where the money went. That transparency is what keeps you out of trouble and gives you a clear picture of your actual business profitability.