To start a 1099 business, you pick a legal structure, register with your state if the structure or name requires it, get a federal Employer Identification Number, set up a separate business bank account, give each client a completed W-9, and take over the tax withholding an employer used to do for you. Learning how to start a 1099 business is mostly about that last part: the IRS treats independent contractors as self-employed, so no one withholds income or payroll tax on your behalf, and no one provides benefits.1Internal Revenue Service. Worker Classification 101: Employee or Independent Contractor Get the structure and the tax habits right in the first month and the rest is maintenance.
Pick a Legal Structure First
Almost every solo 1099 worker chooses between two options: a sole proprietorship or a single-member LLC.
A sole proprietorship needs no formation paperwork. If you start doing paid work and don’t register as anything else, you already are one.2U.S. Small Business Administration. Choose a Business Structure The catch is that your personal and business assets are the same assets in the eyes of the law. A lawsuit or unpaid business debt can reach your savings, your car, and your home.
A limited liability company separates the two. If a client sues the LLC, only the LLC’s assets are typically exposed. Forming one means filing Articles of Organization with your state and paying a one-time fee between roughly $50 and $500 depending on where you live. Taxes stay simple: by default, a single-member LLC is taxed the same as a sole proprietorship, so nothing about your annual return gets harder.
If you form an LLC, write an operating agreement even as a solo member. It sets out how the company is managed, what happens if you’re incapacitated, and how profits move. Without one, your state’s default LLC statute fills those gaps, and the defaults may not match what you’d choose. The document also reinforces the legal line between you and the business, which matters if that line is ever tested.
Name and Register the Business
If you plan to work under anything other than your full legal name, file a “Doing Business As” (DBA) registration, usually with your county clerk. That filing creates a public link between the trade name and you. Sole proprietors who want a professional-sounding brand need this. An LLC owner whose company name is already the brand usually doesn’t.
Before you commit to a name, search your state’s business database through the Secretary of State site. Most states require your name to be “distinguishable” from anything already on file, and a name that’s too close gets rejected during filing. State databases don’t check federal trademarks, so run a second search on the U.S. Patent and Trademark Office database. Finding a conflict after you’ve printed cards and built a site costs far more than checking first.
Get an EIN From the IRS
An Employer Identification Number is a nine-digit federal tax ID for your business. You’ll need it to open a business bank account, file business tax returns, and hire anyone down the line. A sole proprietor with no employees can technically use a Social Security number instead, but the EIN is free, takes minutes, and keeps your SSN off documents you share with clients.3Internal Revenue Service. About Form SS-4, Application for Employer Identification Number (EIN)
Apply online through the IRS. The session expires after 15 minutes of inactivity and can’t be saved, so have your legal name, SSN, business address, and entity type ready before you begin.4Internal Revenue Service. Get an Employer Identification Number When you submit, the system issues the number immediately and lets you print the confirmation notice. Save that PDF. Every bank will ask for it.
Give Clients a W-9
Before a client pays you, they’ll ask for a completed Form W-9. It gives them your taxpayer ID (EIN or SSN) and certifies that you aren’t subject to backup withholding.5Internal Revenue Service. Instructions for the Requester of Form W-9 They use it at year-end to prepare a 1099-NEC reporting what they paid you.
If you don’t provide a valid W-9, or if the IRS tells the client your TIN is wrong, the client has to withhold 24% of every payment and send it to the IRS.6Office of the Law Revision Counsel. 26 U.S. Code 3406 – Backup Withholding You’d get credit for those amounts on your return, but the cash-flow hit lands now. Filling out the W-9 accurately, the first time, avoids the whole mess.
Separate Your Money
A dedicated business bank account is one of the simplest protections you can put in place. Mixing personal and business funds erodes the liability shield of an LLC and turns tax season into forensic accounting. Banks typically ask for your EIN confirmation letter, your state formation documents if you have an LLC, and a government-issued ID.7U.S. Small Business Administration. Open a Business Bank Account
Route every business dollar through that account: payments in, expenses out. Most accounting software connects to a bank feed and categorizes transactions on its own, which saves real time on quarterly estimates and year-end filing.
Set up invoicing at the same time. Every invoice should carry the date, a plain description of the work, the amount owed, and payment terms. “Net 30” is standard for freelance and consulting work; some contractors bill on receipt for smaller jobs. Consistent invoices shorten payment cycles and give you documentation if a client ever disputes a charge.
Take Over Your Own Taxes
This is where new 1099 workers get blindsided. No one is withholding income tax or payroll tax from your checks, so you pay the IRS directly, four times a year. If you expect to owe $1,000 or more when you file, quarterly estimated payments are required.8Internal Revenue Service. Estimated Taxes
For the 2026 tax year, the due dates are:
- Q1: April 15, 2026
- Q2: June 15, 2026
- Q3: September 15, 2026
- Q4: January 15, 2027
The gap between Q1 and Q2 is only two months, which surprises almost everyone the first year.9Taxpayer Advocate Service. Making Estimated Payments Pay through IRS Direct Pay, EFTPS, or a card processor approved by the IRS.10Internal Revenue Service. Direct Pay With Bank Account A common approach is to sweep 25 to 30% of every incoming payment into a separate savings account earmarked for taxes. That range covers income tax and self-employment tax for most brackets.
Self-Employment Tax
On top of income tax, you owe self-employment tax at a combined 15.3%: 12.4% Social Security and 2.9% Medicare.11Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) When you had an employer, the two of you split the bill. Now you pay both halves. The Social Security portion applies to the first $184,500 of net earnings in 2026; Medicare has no cap.12Social Security Administration. What Is the Current Maximum Amount of Taxable Earnings You can deduct the employer-equivalent half of the SE tax when calculating adjusted gross income, which lowers income tax but not the SE tax itself.13Internal Revenue Service. Topic No. 554, Self-Employment Tax It’s above the line, so you get it whether or not you itemize.
Safe Harbors Against the Underpayment Penalty
Miss a quarterly payment or underpay meaningfully and the IRS charges a penalty on the shortfall. Two safe harbors take that risk off the table: pay at least 90% of your current-year tax liability, or pay 100% of your prior-year liability (110% if your AGI last year was above $150,000).14Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty The prior-year safe harbor is especially useful in year one, when your income is hard to predict; base your payments on last year’s W-2 tax and you’re covered even if freelance income comes in higher than expected.
Deductions Worth Tracking From Day One
Legitimate business expenses reduce taxable income, and because they also reduce net self-employment earnings, they cut your SE tax too. Track expenses as they happen. Rebuilding a year of receipts in April is grim work that usually leaves money behind.
Home Office
If you use a space in your home exclusively and regularly for business, the home office deduction is available. The simplified method deducts $5 per square foot up to 300 square feet, capped at $1,500.15Internal Revenue Service. FAQs – Simplified Method for Home Office Deduction The regular method uses actual expenses (mortgage interest, utilities, insurance) prorated to the business-use percentage of your home and sometimes produces a larger deduction at the cost of more recordkeeping.
Health Insurance
Self-employed workers can deduct 100% of health, dental, and long-term care insurance premiums for themselves and their families. Two limits: you can’t be eligible for coverage through a spouse’s employer plan, and the deduction can’t exceed your net business income. It’s an adjustment to income on your personal return, not on Schedule C.
Vehicle and Ordinary Business Costs
For business driving, choose between actual vehicle costs (gas, insurance, repairs, depreciation) and the IRS standard mileage rate. Other common deductions include office supplies, software subscriptions, advertising, professional development, and fees paid to accountants or attorneys for business work. The standard is “ordinary and necessary”: common in your industry and helpful to your business.
Retirement Without an Employer Plan
No employer means no employer-sponsored plan, so retirement saving falls on you. Two tax-advantaged accounts let a solo 1099 worker shelter far more than a standard IRA.
A SEP IRA accepts up to 25% of net self-employment earnings, capped at $72,000 for 2026.16Internal Revenue Service. SEP Contribution Limits (Including Grandfathered SARSEPs) Setup is a single form at most brokerages, and contributions are deductible in the year you make them. All contributions count as employer contributions, so there’s no separate catch-up for workers over 50.
A Solo 401(k) lets you contribute as both employee and employer. Employee deferrals go up to $24,500 in 2026, with a $32,500 cap at age 50 and above and $35,750 for ages 60 to 63 under SECURE 2.0 rules.17Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 On top of that, you can add up to 25% of net self-employment income as an employer contribution. Combined totals top out at $72,000 under 50 and $80,000 at 50 and older. At lower income levels, the flat employee deferral makes a Solo 401(k) shelter more than a SEP.
Ongoing Compliance
Once the business is running, a few recurring items keep it in good standing.
Records. Keep tax records for at least three years from the date you filed. If you underreported income by more than 25%, the window extends to six years. Records tied to property or equipment should stick around at least three years after you dispose of the asset because you’ll need them for depreciation and gain-or-loss math.18Internal Revenue Service. How Long Should I Keep Records Seven years covers nearly every scenario.
Annual state filings. Most states require an annual or biennial report from LLCs to stay in good standing. Fees range from nothing to several hundred dollars. Miss a filing and the state can administratively dissolve the LLC, which strips your liability protection until you reinstate. Set a calendar reminder.
Insurance. No law makes a solo contractor carry business insurance, but going without is a bet. General liability covers property damage or bodily injury claims tied to your work. Professional liability (errors and omissions) covers claims that your work caused a client financial harm. Larger clients often require proof of coverage before signing. Policies for solo consultants and freelancers commonly run $500 to $2,000 per year depending on industry and limits.
FinCEN beneficial ownership reporting. As of March 2025, domestic entities, including LLCs formed in any U.S. state, are exempt from filing Beneficial Ownership Information reports with FinCEN under the Corporate Transparency Act.19FinCEN. Beneficial Ownership Information Reporting An interim final rule narrowed the requirement to foreign-registered companies. If that changes, newly formed LLCs could face a 30-day filing deadline, so check FinCEN before you form an entity in 2026 or later.