How to Start a Sole Proprietorship

Decide if a Sole Proprietorship Fits Your Situation

A sole proprietorship is the default structure for a one-owner business that hasn't filed anything with the state to become an LLC or corporation. It's the simplest and cheapest structure to start, but it gives no separation between you and the business: your personal assets, like a home or savings, can be used to satisfy business debts or a lawsuit judgment against the business. If liability protection matters more than simplicity, an LLC is the next step up and isn't much harder to maintain.

Operating Under Your Own Name Needs No State Filing

If you'll operate under your own legal name, for example, "Jane Smith Photography" is fine without a separate filing in many states if it uses your actual name, most states require no Articles of Organization or Incorporation filing at all to start. You can generally begin operating as soon as you're doing business, though you still need to meet any licensing and tax registration requirements described below.

File a DBA if You Use a Different Name

If you want to operate under a name that doesn't include your own legal name, most states or counties require registering that name as a "doing business as" (DBA) or trade name. This filing is typically handled at the state level in some states and at the county clerk's office in others, so check which office handles it where you operate. A DBA only tells the public who's behind a business name; it doesn't create a separate legal entity or any liability protection.

Get an EIN, Even if It's Not Required

A sole proprietorship with no employees and no other specific triggers generally isn't required by the IRS to get an Employer Identification Number and can use the owner's Social Security number instead. Many sole proprietors get a free EIN anyway, since it avoids putting an SSN on client-facing invoices and most banks require an EIN, or at least prefer one, to open a business bank account.

Open a Separate Business Bank Account

Even though a sole proprietorship has no legal separation from its owner, keeping business income and expenses in a dedicated bank account makes bookkeeping and tax time significantly simpler, and it's useful evidence that the business is run as a real, distinct activity if that's ever questioned.

Get Required Licenses and Permits

A sole proprietorship still needs to meet the same local and industry licensing rules as any other business structure: a general city or county business license, a sales tax permit if you sell taxable goods or services, and any industry-specific professional license your field requires. Operating as a sole proprietorship doesn't exempt you from these requirements just because there was no state entity filing.

Report Income and Pay Self-Employment Tax

A sole proprietor reports business income and deductible expenses on Schedule C, filed with the owner's personal Form 1040. Net profit from Schedule C is also subject to self-employment tax, covering Social Security and Medicare, at a combined 15.3% rate. Since no employer withholds this for you, pay it quarterly using Form 1040-ES rather than waiting for the annual filing deadline, since underpayment can trigger a penalty even if the full amount is eventually paid.

Know When to Consider Upgrading to an LLC

A sole proprietorship works well for a low-risk, early-stage business, but as revenue grows or the business takes on more liability exposure, many owners convert to an LLC for the liability protection. Converting generally means filing Articles of Organization with the state and transferring business assets and contracts to the new entity, which a tax professional or attorney can help structure correctly.

Keep Good Records From the Start

Since a sole proprietorship's tax reporting depends entirely on accurate income and expense tracking, start a simple bookkeeping system, even a dedicated spreadsheet, from your very first sale or invoice. Reconstructing a year of business activity at tax time is far harder than tracking it as it happens.

Liability Risk Is the Core Tradeoff

A sole proprietorship's simplicity comes at the cost of unlimited personal liability for business debts and any lawsuit against the business. Weigh that risk honestly against your specific industry and activities, not just against the convenience of skipping a state filing.

A DBA Doesn't Change Your Tax Filing

Filing a DBA changes what name you can legally use to invoice clients and open accounts; it doesn't change how you report income to the IRS, which still happens on Schedule C under your sole proprietorship. Don't confuse registering a trade name with changing your underlying business structure.

Multiple Sole Proprietors Can't Share One Business

A sole proprietorship, by definition, has exactly one owner. If a second person joins as a co-owner, the business is legally a general partnership instead, which carries its own, different tax reporting and liability rules, regardless of what you call it informally.

Business Insurance Still Matters

A sole proprietorship's lack of liability protection makes business insurance, such as general liability coverage, more important, not less, since there's no entity-level shield to fall back on at all.

This Is Not Legal or Tax Advice

Which structure fits your specific business, and when it makes sense to convert to an LLC, depends on your industry, revenue, and risk tolerance. Talk to a tax professional about your specific self-employment tax obligations and an attorney if your liability exposure is significant.