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SP
Entity type

Sole Proprietorship.

The default. You are the business.

If you're earning money as yourself and haven't filed anything, you're a sole proprietor. It's free. It offers no liability protection. It's what most side hustles start as.

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Tax treatment

How the IRS sees this entity.

Pass-through

Personal (Schedule C)

Profit lands on the owner's personal return. The entity itself pays no federal income tax — the tax knife only cuts once, at personal rates.

Compliance calendar

What you owe, and when.

Forming the entity is the easy part. Here's the recurring paperwork that keeps it alive.

April 15
Schedule C + 1040
Business income on your personal return.
Federal
Quarterly
Estimated tax (1040-ES)
April 15, June 15, Sept 15, Jan 15.
Federal
Pros & cons

What this trades, and for what.

Advantages
  • Free to start
  • No paperwork
  • Simple taxes (Schedule C)
  • Full control
Trade-offs
  • Unlimited personal liability
  • Harder to raise money
  • Self-employment tax on every dollar
  • Dies when you do
Best for

The founders this fits.

  • Solo freelancer invoicing <$40k/yr.
  • Testing an idea in the evenings.
  • No contracts that could trigger a lawsuit.
Avoid if

You have real liability exposure or expect >$50k in profit.

State recommendations

Where to actually file.

  • Your home state

    Sole prop is always local — you don't "form" anywhere.

Conversion paths

When to move on.

  • From
    Sole Prop

    Triggered when: Any real liability exposure, or first client contract.

    File Articles of Organization in your home state. Move the bank account.

Further reading

Related articles.

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