Form Schedule SE: What Business Owners Need to Know About Self-Employment Tax

Who Needs to File Schedule SE?

You file Schedule SE if you have net self-employment income of $400 or more during the year. That includes sole proprietors, partners in a partnership, and single-member LLC owners. If you're a partner, your share of partnership income reported on Schedule K-1 counts toward that threshold.

S-corp owners are a notable exception. If you've elected S-corp status and pay yourself a W-2 salary, that salary is subject to FICA withholding through payroll rather than Schedule SE. Distributions you take above your salary are generally not subject to SE tax at all, which is the core of the S-corp tax strategy covered below.

How Is Self-Employment Tax Calculated?

The calculation starts with your net self-employment income, which is then multiplied by 92.35% to account for the fact that employees only pay their half of FICA taxes. That adjusted figure is multiplied by 15.3%, which breaks down as 12.4% for Social Security and 2.9% for Medicare.

The Social Security portion only applies to the first $160,200 of net SE income (2023 threshold). Above that, only the 2.9% Medicare portion continues. Earners above $200,000 also owe an additional 0.9% Medicare surtax on income beyond that threshold.

The SE Tax Deduction: How to Reduce Your Bill

Business owners can deduct half of their SE tax on Schedule 1 of Form 1040 as an above-the-line deduction. This reduces your adjusted gross income and therefore your income tax, but it doesn't reduce the SE tax itself.

The more powerful strategy for reducing SE tax is electing S-corp status. An S-corp owner splits their business income into two buckets: a reasonable W-2 salary, which is subject to FICA taxes, and distributions, which are not. Only the salary portion triggers FICA obligations. For a profitable business, that split can produce meaningful tax savings compared to paying SE tax on all net income as a sole proprietor or LLC.

Schedule SE and Entity Type: LLC vs. S-Corp

This is one of the most consequential tax decisions a growing business owner faces. As a sole proprietor or single-member LLC, every dollar of net profit is subject to SE tax at 15.3% up to the Social Security wage base. There's no way around it at that entity structure.

An S-corp election (made via Form 2553) changes that. The IRS requires S-corp owners who work in the business to pay themselves a reasonable salary, which is taxed through payroll like any employee. Profits above that salary can be distributed without triggering SE tax. The savings grow as net income grows, which is why the S-corp election is a standard recommendation for businesses generating consistent profit above roughly $50,000 to $60,000 per year. The election involves additional administrative requirements including payroll, so the tradeoff is real cost savings weighed against added complexity.

How to Complete Schedule SE

Most filers use the Short Schedule SE, which is a straightforward calculation that takes net profit from Schedule C, Schedule K-1, or Schedule F and runs it through the SE tax formula. The Long Schedule SE applies in specific situations, including if you had church employee income, received wages from an S-corp, or need to use an optional method to calculate SE income.

The input to Schedule SE flows from wherever your business income is reported. Sole proprietors pull from Schedule C. Partners use Schedule K-1. Farmers use Schedule F.

How Slash Supports Business Owners Managing Tax Obligations

SE tax isn't withheld automatically, which means business owners need to plan for it themselves. The IRS expects quarterly estimated tax payments that include SE tax, and underpayment penalties apply when those payments fall short.

A Slash business bank account gives you real-time visibility into net income throughout the year, making it straightforward to estimate what you'll owe each quarter and set aside the right amount as you go. Knowing your numbers in real time means SE tax bills don't arrive as a surprise in April.