The Short Answer

1. The $4,800 Can Be Taxable Without an LLC

Start with what actually happened.

Evan performed consulting services.

Kevin’s company paid him $4,800.

The arrangement was informal. Evan had no LLC, no business account, and had not even negotiated a fee.

None of those facts makes the payment tax-free.

The first question is not:

Do I have an LLC?

It is:

Why did I receive the money?

If the payment was compensation for services, it is generally included in gross income under IRC §61.

The LLC question comes later.

An individual can operate a business directly as a sole proprietor without first creating a separate legal entity. Schedule C is generally used to report a business operated, or a profession practiced, as a sole proprietor. See the 2023 Schedule C Instructions.

Evan is thinking about whether he has a company.

The tax law is asking whether he is carrying on a trade or business.

Those are different questions.

2026 Update

No material change.

A person still does not need an LLC to operate a federal Schedule C business. Current IRS guidance continues to describe a Schedule C business using an income-or-profit purpose and continuity-and-regularity standard. See IRS — About Schedule C.

2. When Does Side Work Become a Trade or Business?

There is no universal dollar threshold.

There is no rule saying $5,000 of revenue creates a business.

And there is no rule saying the second client automatically creates one.

In Commissioner v. Groetzinger, the Supreme Court explained that an activity generally must be conducted with continuity and regularity and with the primary purpose of earning income or profit. A sporadic activity does not meet that standard.

The 2023 Schedule C Instructions apply essentially the same concept.

For consulting work, relevant facts can include:

• how often the work occurs;
• whether additional clients are accepted or sought;
• whether the taxpayer intends to continue;
• whether the activity is organized and records are maintained; and
• the overall manner in which the work is conducted.

No single factor automatically controls the result.

One client can be enough under the right facts. Multiple payments do not automatically create a trade or business under every set of facts.

The question is what the taxpayer is actually doing.

2026 Update

The core standard remains the same.

Current IRS Schedule C guidance continues to require a primary income-or-profit purpose and continuity and regularity. See IRS — About Schedule C.

3. One Project Can Be Taxable Without Being a Schedule C Business

This is the key distinction in Evan’s first $4,800.

Suppose he completes one unexpected consulting project, receives the payment, and never performs consulting work again.

The $4,800 does not disappear from his tax return.

But if the activity is genuinely isolated or sporadic and does not rise to the level of a trade or business, the income does not necessarily belong on Schedule C.

For 2023, nonbusiness income may instead be reported on Schedule 1 depending on its character. For example, Schedule 1 line 8j applied to income from an activity not engaged in for profit, while line 8z was the residual line for other taxable income not reported elsewhere. See the 2023 Form 1040 Instructions.

The important distinction is:

Taxable income does not automatically equal self-employment income.

IRC §1402 generally ties net earnings from self-employment to income derived from a trade or business carried on by the individual.

Treas. Reg. §1.1402(c)-1 generally uses the §162 trade-or-business concept for this purpose.

What About the Expenses?

If Evan is carrying on a trade or business, IRC §162 generally allows deductions for ordinary and necessary expenses incurred in carrying on that business.

If the activity is not a trade or business, however, the analysis changes. Certain income-producing expenses may instead fall under IRC §212.

For Evan’s 2023 tax year, miscellaneous itemized deductions subject to the §67 two-percent floor were suspended under IRC §67(g).

In practical terms, an isolated nonbusiness activity can receive much less favorable expense treatment than a Schedule C business.

2026 Update

The distinction between business and nonbusiness expenses remains important.

The temporary 2018–2025 suspension of miscellaneous itemized deductions did not simply expire after 2025. Current law continues the disallowance of miscellaneous itemized deductions subject to the §67 two-percent floor, subject to specific exceptions.

See IRC §67 and Public Law 119-21.

For current nonbusiness reporting, taxpayers should use the Schedule 1 instructions applicable to the relevant tax year rather than relying on Evan’s 2023 line numbers. A taxpayer should not assume that expenses connected with an isolated project receive the same treatment as Schedule C business expenses.

4. If It Is a Business, Tax Generally Starts With Net Profit

Now assume Evan keeps consulting.

He accepts another project.

Clients begin referring other clients.

He continues providing services with the intention of earning money.

Those facts increasingly support trade-or-business treatment.

For a sole proprietor, the basic Schedule C concept is:

Gross business income
− allowable business expenses
= net business profit

That is why Evan’s decision to start tracking software, mileage, parking, and other costs makes practical sense if the activity continues.

But a spreadsheet does not make an expense deductible.

An expense still has to satisfy the applicable tax rules, including the general ordinary-and-necessary standard under IRC §162.

And the spreadsheet does not create the business.

It simply becomes useful once there is one.

2026 Update — QBI

A current reader may also need to consider the §199A qualified business income deduction.

The QBI deduction remains part of current federal law, although eligibility depends on the type of business, taxable income, wages, property, and other limitations.

Consulting can also fall within the specified service trade or business (SSTB) rules, which can limit or eliminate the deduction at higher taxable-income levels.

Current-year details should be checked against the applicable IRS instructions because §199A thresholds and other dollar amounts can change annually.

See IRC §199A.

5. Then Comes Self-Employment Tax

Income tax may not be the only federal tax Evan needs to consider.

For 2023, a self-employed individual generally had to file Schedule SE when net earnings from self-employment were at least $400.

Under the regular method, the calculation generally begins with 92.35% of self-employment profit.

The basic self-employment tax consists of:

• 12.4% Social Security
• 2.9% Medicare

For 2023, the Social Security portion was subject to a $160,200 combined wage and self-employment earnings base.

See the 2023 Schedule SE Instructions.

That matters for Evan because he already has a W-2 job.

Social Security wages from his regular employment reduce the remaining Social Security wage base available for self-employment earnings.

Medicare does not have the same wage cap.

A separate 0.9% Additional Medicare Tax can apply when combined Medicare wages and self-employment income exceed the applicable filing-status threshold:

• $250,000 — Married filing jointly
• $125,000 — Married filing separately
• $200,000 — All other filing statuses

See IRS Topic No. 560 — Additional Medicare Tax.

That is why a shortcut such as:

$4,800 × 15.3%

does not necessarily tell Evan how much self-employment tax he owes.

You first need his net business profit and his W-2 wage information.

2026 Update

The basic self-employment-tax structure remains substantially the same.

The general rate remains:

• 12.4% Social Security
• 2.9% Medicare

The regular calculation still generally uses 92.35% of self-employment profit, and the general $400 net-earnings threshold remains.

What has changed is the Social Security wage base.

2023: $160,200
2026: $184,500

See IRS — COLA Increases for Dollar Limitations and IRS Topic No. 554 — Self-Employment Tax.

The Additional Medicare Tax thresholds remain $250,000 for married filing jointly, $125,000 for married filing separately, and $200,000 for other filing statuses. See IRS Topic No. 560.

6. A Form 1099 Does Not Create the Income

Evan also wonders whether a tax form will eventually arrive.

That is a separate issue.

A taxable payment does not become taxable only when a Form 1099 appears.

For payments made in 2023, the general Form 1099-NEC reporting threshold for qualifying nonemployee compensation was $600, subject to applicable reporting rules and exceptions.

Kevin’s company therefore may have its own information-reporting obligation.

But whether Kevin’s company files the form does not determine whether Evan has taxable income.

The reverse is also important:

Receiving a Form 1099-NEC does not automatically mean the recipient has a Schedule C business.

The form reports a payment.

The taxpayer still has to determine the correct tax treatment.

See IRS — Form 1099 Filing Requirements.

2026 Update

This is one of the clearest dollar changes between Evan’s tax year and today.

For qualifying nonemployee-compensation payments:

2023: general Form 1099-NEC threshold = $600

2026: general Form 1099-NEC threshold = $2,000

For payments after 2026, the threshold is subject to inflation adjustment.

See the 2026 Instructions for Forms 1099-MISC and 1099-NEC.

This change affects the payer’s information-reporting requirement.

It does not create a $2,000 tax-free amount for the recipient.

A taxpayer can still have taxable income even when no Form 1099 is required.

7. Does $4,800 Mean Quarterly Estimated Taxes?

Not automatically.

Estimated-tax requirements look at the taxpayer’s overall tax situation, not simply whether side income exists.

For 2023, an individual generally needed estimated tax payments when the taxpayer expected to owe at least $1,000 after withholding and refundable credits and expected withholding and credits to be less than the smaller of generally:

• 90% of current-year tax, or
• 100% of prior-year tax.

For certain higher-income taxpayers, the prior-year percentage generally increases to 110% when prior-year AGI exceeds $150,000, or $75,000 for married filing separately.

See the 2023 Form 1040-ES.

Someone with W-2 wages may also be able to increase paycheck withholding instead of making separate estimated-tax payments.

So:

“I made $4,800 on the side. Do I need quarterly payments?”

does not have a universal yes-or-no answer.

You have to look at the entire tax picture.

2026 Update

The general federal framework remains substantially the same for 2026:

• expected tax due of at least $1,000 after withholding and refundable credits;
• 90% of current-year tax;
• 100% of prior-year tax; or
• 110% of prior-year tax for applicable higher-income taxpayers.

A taxpayer with W-2 wages can also consider increasing wage withholding.

See the 2026 Form 1040-ES.

8. So What About Evan?

When Evan receives the first $4,800, several facts are clear.

He performed real professional services.

He received compensation.

The consulting uses skills closely related to his regular work in corporate strategy.

Other facts are less developed.

The work began as a favor.

No fee was negotiated.

There had been only one engagement.

And Evan had not yet decided whether he intended to continue consulting.

That makes the income question easier than the trade-or-business question.

Then Kevin sends another message.

A second company wants Evan’s help.

If Evan accepts the project and consulting begins to repeat, the activity starts looking less like an isolated engagement and more like an ongoing profit-seeking activity conducted with continuity and regularity.

That does not mean:

Second client = business.

There is no such rule.

It means the facts are changing.

And tax treatment often changes because the facts change.

California Note

Evan lives in California.

A California sole proprietor generally reports business income through the individual income-tax return framework, beginning with the corresponding federal amounts and making California adjustments where state and federal law differ.

See California FTB — Sole Proprietorship and the 2023 Schedule CA (540) Instructions.

That is different from forming a California LLC.

If Evan later creates a single-member LLC that is disregarded for income-tax classification purposes, the underlying income generally continues to be treated as the owner’s income for income-tax purposes.

But:

Disregarded does not mean ignored by California.

A California LLC can have its own Form 568 filing requirements and separate LLC-level tax and fee obligations.

2026 Update

The distinction remains important today.

California currently generally imposes an $800 annual LLC tax on LLCs doing business or registered in California, subject to applicable exceptions.

An additional LLC fee may also apply when total California annual income reaches the applicable statutory threshold, beginning at $250,000.

Form 568 remains part of the California LLC filing framework.

See California FTB — Limited Liability Company and California FTB — Single-Member LLC.

So Evan does not need an LLC to recognize or report his consulting income.

And forming one can create additional California filing and tax obligations rather than simply changing the name of the business.

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Common Mistakes

“I don’t have an LLC, so I don’t have a business.”
Not necessarily. An individual can operate a business as a sole proprietor without forming an LLC.

“I didn’t receive a 1099, so I don’t report the money.”
Generally incorrect. Information reporting does not determine whether compensation is taxable.

“The 2026 Form 1099-NEC threshold is $2,000, so the first $2,000 is tax-free.”
Incorrect. The threshold relates to the payer’s information-reporting obligation, not the recipient’s taxable-income calculation.

“I received a 1099-NEC, so I automatically file Schedule C.”
Not necessarily. Information reporting and the trade-or-business determination are separate questions.

“If I spent money on the project, I can deduct it.”
Not automatically. Deductibility depends on the nature of the activity, the type of expense, and the applicable tax rules.

“Any side income means quarterly estimated payments.”
Not automatically. Total tax, withholding, credits, prior-year tax, and applicable safe-harbor rules all matter.

The Key Distinction

The cleanest way to understand Evan’s first $4,800 is to ask three separate questions.

1. Is the payment taxable?

Generally, yes.

It was compensation for services.

2. Is Evan already carrying on a trade or business?

Maybe.

That depends on the facts—particularly profit purpose, continuity, regularity, and how the activity develops.

3. What changes if the consulting becomes a business?

Schedule C reporting, business-expense deductions, self-employment tax, recordkeeping, estimated-tax planning, and potentially other business-tax provisions enter the picture.

The LLC question can come later.

The tax consequences do not have to wait for one.

Reference

Federal Income & Trade-or-Business Rules

IRC §61 — Gross Income
Broad federal gross-income rule, including compensation for services.
26 U.S.C. §61 — Gross Income

IRC §162 — Trade or Business Expenses
General authority for ordinary and necessary expenses incurred in carrying on a trade or business.
26 U.S.C. §162 — Trade or Business Expenses

IRC §212 — Expenses for Production of Income
Addresses certain income-producing expenses outside a trade or business.
26 U.S.C. §212 — Expenses for Production of Income

IRC §67 — Miscellaneous Itemized Deductions
Relevant to the treatment of miscellaneous itemized deductions.
26 U.S.C. §67

IRC §199A — Qualified Business Income Deduction
Provides the federal QBI deduction framework for qualifying trades or businesses.
26 U.S.C. §199A

Commissioner v. Groetzinger, 480 U.S. 23 (1987)
Leading Supreme Court authority for the continuity-and-regularity trade-or-business standard.
Commissioner v. Groetzinger — Full Opinion

Current IRS Schedule C Guidance
Current IRS overview of Schedule C and the trade-or-business standard.
IRS — About Schedule C

Self-Employment Tax

IRC §1402 — Net Earnings From Self-Employment
Defines the federal net-earnings-from-self-employment framework.
26 U.S.C. §1402

Treas. Reg. §1.1402(c)-1 — Trade or Business
Connects the self-employment-tax trade-or-business concept to the §162 standard.
Treas. Reg. §1.1402(c)-1

2023 Instructions for Schedule SE
Provides Evan’s applicable $400 threshold and 2023 Social Security wage base.
IRS — 2023 Schedule SE Instructions

IRS Topic No. 554 — Self-Employment Tax
Current federal self-employment-tax overview.
IRS — Self-Employment Tax

IRS Topic No. 560 — Additional Medicare Tax
Provides the current Additional Medicare Tax thresholds.
IRS — Additional Medicare Tax

IRS — COLA Increases for Dollar Limitations
Provides current Social Security and other inflation-adjusted federal amounts.
IRS — COLA Increases

Income Reporting & Estimated Tax

IRS Form 1099 Filing Requirements
Current IRS overview of information-return filing requirements.
IRS — Form 1099 Filing Requirements

2026 Instructions for Forms 1099-MISC and 1099-NEC
Provides the current Form 1099-NEC reporting threshold and post-2026 inflation-adjustment framework.
IRS — Forms 1099-MISC and 1099-NEC Instructions

2026 Form 1040-ES — Estimated Tax for Individuals
Provides the current federal estimated-tax framework.
IRS — 2026 Form 1040-ES

Current-Law Changes

Public Law 119-21
Relevant to post-2025 changes affecting miscellaneous itemized deductions and other individual and business tax provisions.
Congress.gov — Public Law 119-21

California

California FTB — Sole Proprietorship
Current California filing framework for sole proprietors.
FTB — Sole Proprietorship

California FTB — Limited Liability Company
Current California LLC filing, annual-tax, and LLC-fee framework.
FTB — Limited Liability Company

California FTB — Single-Member LLC
Current California guidance specifically applicable to single-member LLCs.
FTB — Single-Member LLC

See This Rule in the Story

Episode 01 — The First $4,800

Evan receives his first consulting payment before he has decided whether consulting is a business at all.

The money comes first.

The structure comes later.

READ EPISODE 01 →