Common Tax Forms for the Self-Employed: Schedule C, Schedule SE, and Related Forms

That net profit then flows into Form 1040, the main personal income tax return.

In addition, Schedule SE calculates self-employment tax, which relates to Social Security and Medicare contributions for people who work for themselves.

Other forms, such as Form 1040-ES for estimated taxes or Form 4868 for an IRS tax extension, may also apply depending on your situation and the tax year.

Understanding how these forms connect can make tax season much less confusing.

How Self-Employed Income Is Reported on Tax Forms

When you work for yourself, taxes are reported differently than they are for employees who receive a W-2.

Instead of having an employer withhold taxes automatically, self-employed individuals generally report their self-employment earnings on their personal tax return and may be responsible for making tax payments directly to the IRS.

What counts as self-employment income

Self-employment income generally includes money earned from:

• Freelance work
• Contract work as an independent contractor
• Side businesses or online sales
• Consulting or professional services
• Gig economy work, such as ride sharing or delivery apps

This income is often reported on forms such as 1099-NEC or 1099-K, although not all self-employment income arrives on a tax form.

If you want to learn more about this topic, see our guide to reporting 1099 income.

Why self-employed taxes feel different

Many new freelancers or gig workers are surprised when they file their income tax return.

Unlike employees, self-employed workers are generally responsible for:

• Reporting their gross income from a business
• Tracking ordinary and necessary expenses
• Paying self-employment tax
• Potentially making quarterly payments

This structure exists because there is no employer handling the employer portion of payroll taxes.

Schedule C Explained: Reporting Business Income and Expenses

One of the most common tax forms used by sole proprietors and single-member LLCs is Schedule C.

Purpose of Schedule C

Schedule C reports income and expenses from a sole proprietorship or single-member LLC and calculates the net profit or loss from the business.

It is typically filed together with Form 1040 as part of your personal tax return.

What Schedule C reports

Schedule C typically reports three main categories of information:

1. Gross receipts

This includes the total gross receipts or revenue your business earns during the tax year.

Examples may include:

• Payments from clients
• Contract income
• Online sales
• Other additional income from business activities

2. Business expenses

Schedule C also reports business expenses considered ordinary and necessary for operating the business.

Common examples may include:

• Office supplies
• Software subscriptions
• Marketing costs
• Equipment used for business use
• Certain business deduction categories, such as a home office deduction
• Equipment depreciation
• Payments to contractors or wagers paid to employees

These expenses help determine how much of your business income is taxable.

3. Net profit or net loss

After expenses are subtracted from gross income, the result is either:

• Net profit, meaning the business earned money
• Net loss, meaning expenses exceeded revenue

This number is important because it determines the net earnings from self-employment used in other parts of the tax return.

Source: IRS Pub. 334

Schedule SE Explained: Calculating Self-Employment Tax

Many first-time freelancers encounter a second form called Schedule SE.

Why do self-employed workers pay Social Security and Medicare tax

Self-employment tax covers Social Security and Medicare taxes for self-employed workers. For 2025, the combined rate is 15.3%, similar to the combined employer and employee payroll taxes paid on wages.

Employees usually share these payroll taxes with their employer. When someone works for themselves, there is no employer responsible for the other portion. As a result, self-employed individuals generally pay both the employee and employer portions of these taxes.

These contributions help fund programs such as:

• Social Security retirement benefits
• Disability insurance
• Medicare health coverage

For employees, these taxes are typically withheld automatically from each paycheck. For self-employed individuals, the responsibility for paying them shifts to the individual.

Source: Schedule SE Instructions

How Schedule SE calculates self-employment tax

Schedule SE calculates self-employment tax based on net earnings from self-employment, which are generally 92.35% of your net profit from Schedule C. The resulting tax funds Social Security and Medicare.

Schedule SE calculates the amount of Social Security and Medicare taxes associated with those earnings. That amount then flows into the overall tax liability reported on your Form 1040. As an aside, net profit usually refers to income from normal operations, whereas net earnings include one-time gains or losses, restructuring expenses, and other non-cash operational costs.

Source: IRS Schedule SE Instructions

How Schedule C and Schedule SE Flow Into Form 1040

A common source of confusion is how multiple tax forms work together.

Schedule C flows into Form 1040

The net profit or loss from Schedule C flows to Schedule 1 (Additional Income and Adjustments) and then into Form 1040, where it becomes part of your total income.

This amount is generally included with:

• W-2 wages
• Investment income
• Other income sources

Together, these determine your adjusted gross income and eventually your income tax liability.

Schedule SE flows into Form 1040

The self-employment tax calculated on Schedule SE is also transferred to your Form 1040.

This amount represents the Social Security and Medicare taxes on self-employment earnings.

Additional schedules may appear

Some self-employed individuals may also encounter additional schedules attached to their income tax return, such as Schedule 1, which reports certain types of additional income or adjustments.

These schedules simply help organize information before it is combined on the main Form 1040.

Other Forms Self-Employed Individuals May Encounter

Beyond Schedule C and Schedule SE, there are a few other forms that sometimes appear in self-employed tax situations.

Form 1040-ES and quarterly estimated taxes

Form 1040-ES helps self-employed taxpayers calculate quarterly estimated tax payments, which are generally due April 15, June 15, September 15, and January 15 of the following year. For a full explanation, see our guide to quarterly estimated taxes.

Form 4868 and income tax extensions

If someone needs additional time to file their tax return, they may submit Form 4868, which requests an extension of time to file.

However, an IRS tax extension gives more time to file, not more time to pay self-employment tax or income tax.

If a tax bill remains unpaid after the filing deadline, interest and penalties may apply depending on the situation.

Other forms that self-employed individuals may see

Depending on the structure of the small business, additional documents may appear in a tax return, such as:

• Information statements like 1099 forms
• Other IRS forms related to business income
• Supporting schedules attached to Form 1040

These forms simply help document self-employment income, business deductions, and other relevant financial information.

Filing Thresholds and When You Must File

One area that causes confusion is when self-employed individuals actually need to file a tax return.

Filing requirements can start at lower income levels

Because of the self-employment tax, people who earn income from a sole proprietorship, independent contractor work, or gig platforms may be required to file a tax return even when their income is relatively low.

The specific income limit that triggers filing requirements depends on multiple factors and varies by taxpayer.

The $400 net earnings concept

If your net earnings from self-employment are $400 or more, you generally must file a federal tax return and pay self-employment tax, even if your total income would otherwise fall below the normal filing threshold. The detailed explanation of that rule is covered in our guide to self-employment tax.

Source: IRS Schedule SE Instructions

Other situations that may trigger filing

Someone may also need to file a tax return if they:

• Received other income
• Want to claim a tax refund
• Had advance tax credits or other adjustments
• Owe a remaining balance from prior tax payments

Because tax rules depend on multiple variables, filing requirements generally depend on the full tax situation.

Common Misunderstandings About Self-Employed Tax Forms

Taxes for freelancers often feel confusing because several misconceptions circulate online.

Let’s clear up a few common ones.

Misconception: Only 1099 income counts

Some people assume they only need to report income that appears on a 1099.

In reality, earnings from self-employment generally include all business revenue, even if a tax form was never issued.

Misconception: Filing an extension delays payment

Another common misunderstanding is that a tax extension postpones tax payments.

An income tax extension provides extra time to file your tax return, but the tax applies to the original deadline. Interest and penalties may apply if payment is late.

Misconception: Schedule SE replaces income tax

Some taxpayers assume Schedule SE replaces their normal income tax.

That is not the case.

Self-employment tax and income tax are separate components of the overall tax liability, and both may appear on the same Form 1040.

Where to Go Next

If you are navigating taxes as a freelancer, contractor, or side-hustler, these related guides may help clarify other parts of the process:

• Learn about reporting 1099 income
• Understand self-employment tax
• Explore how quarterly estimated taxes work

These topics build on the same concepts covered here and help explain how self-employed individuals manage their tax obligations throughout the year.

Final Thoughts

Understanding how Schedule C, Schedule SE, and Form 1040 work together can make self-employed taxes much easier to navigate. These forms simply organize how business income, business expenses, and self-employment tax are reported during tax season.

If you are new to self-employment, learning the role of each form can reduce confusion and help you better understand your overall tax obligations as a freelancer, independent contractor, or small business owner.