To become an independent consultant, you choose a business structure, register it with your state, get a federal tax ID from the IRS, open a business bank account, and put a written client agreement in place before you take on work. The initial paperwork can be done in a few days. The decision that shapes your finances for years afterward is tax-related: as a self-employed person, you owe a 15.3% self-employment tax on top of your regular income tax, and you’re expected to pay it in quarterly installments throughout the year.
Pick a Business Structure
Your structure determines how you pay taxes, how exposed your personal assets are if something goes wrong, and how much annual paperwork you deal with. Three options cover almost every consulting practice.
A sole proprietorship is the simplest. There’s no legal separation between you and the business. You don’t file formation documents with the state; you just start working and report the income on your personal tax return. The catch is unlimited personal liability. If a client sues, your personal savings and property are on the table.
A Limited Liability Company (LLC) creates a legal wall between your personal assets and your business debts. If the business is sued or can’t pay its bills, creditors generally can’t reach your personal bank account or home. That protection is why most consultants form an LLC instead of operating as a sole proprietor. The tradeoff is more paperwork and state fees, both upfront and every year.
A general partnership works like a sole proprietorship but with two or more owners sharing profits and losses. Partners face the same unlimited personal liability. A written partnership agreement covering each person’s financial stake and decision-making authority isn’t legally required, but going without one invites disputes.
Register the Business With Your State
If you form an LLC, the state will require “LLC” or “Limited Liability Company” in the formal name. Check the name against the state’s online business database before filing. If another entity already holds the same or a confusingly similar name, your filing will be rejected.
Sole proprietors can operate under their own legal name with no filing. To use a trade name instead — something like “Summit Strategy Consulting” — file a Doing Business As (DBA) registration with your state or county. It’s a straightforward form, not a new entity. It just creates a public record linking the trade name to you.
To form an LLC, you submit Articles of Organization to the Secretary of State or equivalent agency. The form asks for the business name, a physical street address, the names of the people managing the LLC, and a registered agent. The registered agent is a person or company with a physical address in the state who accepts legal documents on the business’s behalf. In most places, you can serve as your own.
Most states offer online filing with confirmation in minutes. Filing by mail can take several weeks. LLC formation fees generally run from $50 to $500 depending on the state, and they’re non-refundable regardless of whether the filing is approved. Once the state approves the filing, you receive a Certificate of Formation (sometimes called a Certificate of Organization). That’s the document banks, clients, and vendors will ask to see.
Do You Need to Register in Other States?
If you have an ongoing physical presence in another state — an office, a warehouse, or employees working there — that state may require you to register as a “foreign” entity. Maintaining a bank account in another state, running a website that people in other states can see, or completing a single isolated project typically doesn’t trigger registration. Foreign qualification requires a separate application and fee in each additional state, so check before you lease space or hire outside your home state.
Get an EIN From the IRS
An Employer Identification Number is a nine-digit number the IRS assigns to your business for tax filing and reporting. An LLC or partnership needs one. Sole proprietors can use their Social Security number instead, but getting an EIN keeps your SSN off invoices and business forms and reduces identity theft risk.
The fastest way to get one is through the IRS online application, which is free and issues the number immediately.1Internal Revenue Service. Employer Identification Number You’ll answer questions about the entity type, the reason you’re applying (typically “started a new business”), and the responsible party’s identifying information.2Internal Revenue Service. Instructions for Form SS-4 (12/2025) Fax and mail options exist through Form SS-4, but the online version takes about ten minutes.
The EIN is not interchangeable with your SSN. The IRS specifically warns against using an EIN in place of an SSN for personal purposes.2Internal Revenue Service. Instructions for Form SS-4 (12/2025) It’s for business tax filings, hiring, and opening business bank accounts.
Plan for Self-Employment Tax and Quarterly Payments
This is the piece that catches most new consultants off guard. When you work as an employee, your employer pays half your Social Security and Medicare taxes and withholds the other half from your paycheck. When you consult independently, you pay both halves. The combined self-employment tax rate is 15.3% on your net earnings, split into 12.4% for Social Security and 2.9% for Medicare.3Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) That’s on top of regular federal income tax.
The Social Security portion applies only to the first $184,500 of net self-employment income in 2026.4Social Security Administration. What Is the Current Maximum Amount of Taxable Earnings for Social Security The Medicare portion has no cap. If your net self-employment income tops $200,000 (or $250,000 married filing jointly), you owe an additional 0.9% Medicare surtax on the amount over that threshold.5Internal Revenue Service. Topic No. 560, Additional Medicare Tax One consolation: you can deduct half of your self-employment tax when calculating adjusted gross income, which reduces your income tax bill.
Quarterly Estimated Payments
Because no employer is withholding tax from your consulting income, the IRS expects you to pay as you earn through quarterly estimated payments on Form 1040-ES. The four due dates are April 15, June 15, September 15, and January 15 of the following year. Underpay any of them and the IRS charges an underpayment penalty, even if you’re owed a refund when you file the annual return.6Internal Revenue Service. Estimated Tax
A safe approach for the first year is to pay at least 100% of your prior year’s total tax liability, spread across the four quarters (110% if your adjusted gross income was over $150,000). That safe harbor eliminates the underpayment penalty even if you end up owing more at year-end. A practical rule of thumb: set aside 25% to 30% of each client payment as it comes in. For most consultants in the middle brackets, that covers income tax and self-employment tax together.
Home Office Deduction
If you work from a dedicated space in your home used regularly and exclusively for consulting, you can deduct part of your housing costs. The simplified method gives you $5 per square foot of office space, capped at 300 square feet, for a maximum $1,500 deduction. The regular method requires tracking actual expenses (rent or mortgage interest, utilities, insurance, repairs) and allocating them by the office’s share of your home’s square footage. The regular method usually produces a bigger deduction, at the cost of more recordkeeping.
Open a Business Bank Account and Get Insurance
Open a dedicated business bank account before you accept your first payment. Mixing personal and business funds is the fastest way to lose the liability protection an LLC provides. Courts call it “piercing the corporate veil,” and it happens when an owner treats the LLC’s money as their own. Banks will generally ask for your Certificate of Formation and EIN to open the account.
Professional liability insurance (also called errors and omissions insurance) covers legal costs and damages if a client claims your work caused them financial harm. Many client contracts with larger companies will require you to carry coverage with limits between $1 million and $2 million before they’ll sign. Getting a quote before you need one saves a scramble mid-negotiation.
Use a Written Consulting Agreement
Working without a written agreement is one of the more expensive mistakes a new consultant can make. At minimum, the contract should cover the specific scope of work, the payment structure, invoicing and payment deadlines, late payment penalties, and how either party can end the engagement. Scope matters most. Vague descriptions of deliverables are the single biggest source of consulting disputes because they let clients add work that was never priced.
A late-payment clause protects your cash flow. A monthly interest charge on overdue invoices is common; the rate is whatever you negotiate, but it needs to be in the contract before work starts. Confidentiality language protects both sides. A choice-of-law clause specifying which state’s law governs disputes determines where you’d need to appear if things ended up in court.
Who Owns the Work
Under federal copyright law, the creator owns the copyright to their work by default. When a client hires you as an independent contractor, you own the deliverables unless the contract says otherwise. This surprises many clients.
If the client needs to own the copyright outright, the contract must include a “work made for hire” clause signed by both parties. Federal law limits that arrangement to specific categories of commissioned work, including contributions to collective works, compilations, instructional texts, and supplementary works.7U.S. Copyright Office. Circular 30 Works Made for Hire If the deliverable doesn’t fit one of those categories, a work-made-for-hire clause won’t actually transfer copyright. You’d need a separate written assignment of rights instead. Getting this wrong usually surfaces at the worst possible time.
Handle Professional Licenses, Local Permits, and Zoning
If your consulting work falls in a regulated field (accounting, engineering, architecture, healthcare, and similar), you’ll need a professional license from the relevant state board before offering services. That license is separate from your business registration, generally requires proof of education, an exam, and continuing education credits, and letting it lapse can make your service contracts unenforceable.
Many cities and counties also require a general business operating license or permit, even for home-based consultants. Fees are usually modest and vary by location. Some cities don’t require one. Check with your local city or county clerk’s office.
If you plan to work from home, local zoning ordinances may impose restrictions on what a home-based business can look like: limits on client foot traffic, restrictions on exterior signage, caps on non-resident employees, and rules about commercial vehicles in the driveway. A consultant working alone and meeting clients offsite or remotely usually clears these easily. Trouble tends to hit people hosting regular in-person meetings or storing inventory at home. A call to your local zoning or planning office answers the question quickly.
Set Up a Retirement Account
Losing an employer-sponsored plan doesn’t mean losing tax-advantaged retirement savings. The self-employed options actually allow higher contributions than a standard workplace 401(k).
SEP IRA
A Simplified Employee Pension IRA is the easiest option to set up. You can contribute the lesser of 25% of net self-employment income or $69,000 in 2026.8Internal Revenue Service. SEP Contribution Limits (Including Grandfathered SARSEPs) Contributions are tax-deductible in the year you make them. Most brokerages will open one with a single form, and you have until your tax filing deadline (including extensions) to make contributions for the prior year.9Internal Revenue Service. Retirement Plans for Self-Employed People
Solo 401(k)
A solo 401(k) lets you contribute in two capacities. As the “employee,” you can defer up to $24,500 in 2026. As the “employer,” you can add up to 25% of net self-employment income on top of that. Consultants aged 50 to 59 or over 64 can add another $8,000 in catch-up contributions; consultants aged 60 through 63 get a higher catch-up of $11,250.10Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 The solo 401(k) also offers a Roth option; the SEP IRA does not.
For most consultants earning under roughly $200,000, the solo 401(k) allows larger total contributions than the SEP IRA thanks to the employee deferral. The tradeoffs are slightly more administrative work and a plan-establishment deadline of December 31 of the tax year. A SEP can be opened retroactively; a solo 401(k) can’t.
Keep the Registration Active
Forming your business is a one-time event. Keeping it in good standing is not. Most states require LLCs and corporations to file periodic reports (annually or every two years) and pay a fee. The reports update basic information like your business address, registered agent, and managing members. Fees range from essentially nothing to several hundred dollars. Miss a filing deadline or let a fee lapse and the state can administratively dissolve the entity, which strips away liability protection and your exclusive right to the business name.
Put a calendar reminder well ahead of each filing deadline. Most state business databases let you check status online, and some states send email reminders, but relying on notifications alone is risky given how disproportionate the consequences are.
One note on beneficial ownership reporting: under a March 2025 FinCEN interim final rule, all entities formed in the United States are exempt from the Corporate Transparency Act’s beneficial ownership reporting requirement.11FinCEN.gov. Beneficial Ownership Information Reporting Only foreign companies registered to do business in a U.S. state still need to file. A new domestic LLC or corporation formed for consulting does not need to submit a beneficial ownership report under the current rules. This area has been in flux, so check FinCEN’s site if your situation changes.