Self-Employed Tax Prep Checklist

Where the 2026 calendar stands right now

It is early July 2026, which puts self-employed filers in the middle of two live deadlines. If you filed an extension for your 2025 return, your final filing deadline is October 15, 2026. And your third-quarter 2026 estimated tax payment is due September 15, 2026 (the fourth-quarter payment follows on January 15, 2027). If you missed the June 15 payment, do not wait for year-end. Paying now limits how much the underpayment penalty grows, since it accrues by the day.

Step 1: Round up every source of income

Gather your 1099-NEC forms, 1099-K summaries from apps and card processors, platform statements (Uber, DoorDash, Etsy, Upwork), invoices, and bank deposits. Two things trip people up here:

• Recent law changes restored the higher 1099-K reporting threshold ($20,000 and 200 transactions), so many side hustlers will not receive a form at all. The income is still taxable. Report it whether or not a form shows up.
• If you paid contractors yourself, collect W-9s now. For payments made in 2026, the 1099 reporting threshold rises to $2,000, but you still need clean records of what you paid and to whom.

Step 2: Organize the deductions that actually move the needle

• Vehicle: keep a mileage log with dates, miles, and business purpose. The IRS updates the standard mileage rate each year, and a preparer can compare it against actual expenses to see which saves more.
• Home office: the simplified method allows $5 per square foot up to 300 square feet (a $1,500 cap). Measure the space you use regularly and exclusively for work. Our home office guide walks through it.
• Everything else: software subscriptions, supplies, the business share of phone and internet, insurance, advertising, professional fees, and contract labor. Pull a year-to-date report from your bank or bookkeeping app and tag business items monthly instead of reconstructing 12 months in April.

Step 3: Know the numbers behind your tax bill

Self-employment tax runs 15.3% on your net profit (12.4% Social Security plus 2.9% Medicare), and you deduct half of it automatically. On top of that, the 20% qualified business income (QBI) deduction was made permanent by the 2025 tax law, so most sole proprietors and single-member LLCs can still shave a fifth off their taxable business income if they qualify. Retirement contributions (SEP IRA or Solo 401(k)) and the self-employed health insurance deduction can cut the bill further, and there is still time to plan those before year-end.

Step 4: Check the new 2025-2028 deductions

If you also hold a W-2 job alongside your business, the newer deductions for qualified tips (up to $25,000) and qualified overtime pay may apply to your W-2 income for tax years 2025 through 2028, subject to income phaseouts. They do not apply to your self-employment profit, but they change the overall picture, so bring those pay stubs to your preparer.

Step 5: Set aside money and pay quarterly

A working rule of thumb for Central Florida filers (no state income tax helps) is to set aside 25% to 30% of net profit for federal taxes. Then pay it in four estimated payments instead of one painful bill. Our quarterly estimated taxes guide covers the safe-harbor rules that keep penalties off your back.

Common mistakes to avoid

• Waiting until the deadline to gather documents.
• Guessing on deductions you cannot support with records.
• Skipping estimated payments because "I'll settle up in April."
• Ignoring IRS or state letters.
• Filing without a human review.

How Zero Fuss Taxes helps

We guide your intake, organize your documents, flag anything missing, and an experienced, IRS-registered preparer completes and reviews your return. You review and approve before anything is filed, with clear pricing and a real person to talk to. Self-employed returns start at $150, and we never base our fee on your refund.

FAQ

General information, not tax advice for your specific situation. Rules can change, a human preparer reviews your facts before any return is filed.