You finally had a great year. Profit is up, the bank balance looks healthy, and then your tax preparer says, “You owe about $11,000 in self-employment tax, before income tax.” Every year, thousands of new sole proprietors and LLC owners get blindsided by this bill because nobody told them it existed. The good news: self-employment tax is predictable, and with clean books you can plan for it all year long.
This guide explains what self-employment tax is, how it is calculated (with a worked example), how to reduce it legally, and how good bookkeeping keeps it from becoming a surprise.
What Is Self-Employment Tax?
When you work for an employer, Social Security and Medicare taxes (together called FICA) are split: you pay half through payroll withholding and your employer pays the other half. When you are self-employed, you are both the employee and the employer, so you pay both halves. That combined amount is self-employment tax, often shortened to “SE tax.”
It is separate from federal income tax. You can owe SE tax even if your income is low enough that you owe little or no income tax. Per IRS.gov, you generally must pay it and file Schedule SE if your net earnings from self-employment are $400 or more.
Who Has to Pay It?
- Sole proprietors and independent contractors (1099 workers)
- Single-member LLC owners taxed as a sole proprietorship
- Partners in a partnership and members of multi-member LLCs taxed as partnerships (on their share of earnings, generally)
- Gig workers, freelancers, and side-hustlers with $400+ in net earnings
Owners of S corporations who take a wage are treated differently, which we cover below. You can also read our comparison of S-Corp vs LLC bookkeeping and tax differences.
Self-Employment Tax Rate: The Numbers for 2026
The SE tax rate is 15.3% of your net earnings, made up of two parts:
- 12.4% Social Security, which applies only up to the annual wage base. For 2026 the Social Security Administration set it at $184,500. Confirm the current figure at SSA.gov before filing.
- 2.9% Medicare, which applies to all net earnings with no cap.
Higher earners also owe an Additional Medicare Tax of 0.9% on earnings above $200,000 (single) or $250,000 (married filing jointly). There is no employer match for this one.
The 92.35% Adjustment
You do not pay 15.3% on your full profit. The IRS lets you first multiply net profit by 92.35%, which approximates the employer-half deduction that W-2 employees effectively get. That adjusted number is what the 15.3% applies to.
Self-Employment Tax Example: A Worked Calculation
Say you run a consulting business as a single-member LLC. Your revenue is $120,000 and your deductible business expenses are $40,000, so your Schedule C net profit is $80,000.
- Net profit: $80,000
- Multiply by 92.35%: $73,880
- Multiply by 15.3%: $11,303.64 SE tax
- Deduct half of SE tax ($5,651.82) on Schedule 1 when computing your income tax
That deduction does not reduce SE tax itself; it reduces the income that is subject to federal income tax. Notice what this shows: every $1,000 of legitimate, documented expense you capture saves roughly $140 in SE tax alone (15.3% × 92.35%), plus your income tax savings. Missed expenses cost real money. See our list of tax deductions small businesses often miss, and note that this is why expense tracking matters so much.
How to Pay Self-Employment Tax: Estimated Payments
Nobody withholds tax from your client payments, so the IRS expects you to pay as you go through quarterly estimated payments using Form 1040-ES. If you expect to owe $1,000 or more for the year, you generally need to make them. The usual due dates are April 15, June 15, September 15, and January 15 of the following year (shifted when a date lands on a weekend or holiday).
To avoid underpayment penalties, the common safe harbors are paying at least 90% of this year’s tax or 100% of last year’s total tax (110% if your prior-year adjusted gross income exceeded $150,000). We break the process down in our guide to quarterly estimated taxes for small business owners.
A Practical Rule of Thumb
Many freelancers set aside 25% to 30% of every payment received into a separate savings account. The right percentage depends on your income, state, and deductions, so treat it as a starting point and have a professional refine it.
Legal Ways to Reduce Self-Employment Tax
There is no loophole to eliminate SE tax, but several legitimate strategies lower it or lower your overall tax bill:
- Track every deductible expense. Software, mileage, equipment, professional fees, and the home office deduction reduce net profit, which reduces SE tax directly.
- Deduct half of SE tax. It is automatic on Schedule 1, but make sure your preparer applies it.
- Take the self-employed health insurance deduction if you qualify. It lowers income tax, though not SE tax.
- Contribute to a retirement plan. A SEP IRA or Solo 401(k) lowers income tax, though it does not reduce SE tax.
- Consider an S corporation election. Owners who qualify can pay themselves a reasonable salary (subject to payroll taxes) and take the remainder as distributions that are not subject to SE tax.
A Caution About S Corporations
The S corp strategy only works when your salary is “reasonable” for the work you do. The IRS scrutinizes owners who pay themselves very little. S corp status also adds costs: payroll processing, a separate business return (Form 1120-S), and often higher state fees. It generally starts to make sense once net profit is comfortably above what a reasonable salary would be, but run the numbers with a CPA before electing. Our payroll services can handle the owner-salary side once you decide.
How Bookkeeping Protects You From a Surprise SE Tax Bill
SE tax is based on net profit, and net profit is only as accurate as your books. Common problems we see:
- Personal and business spending mixed together, so deductible expenses are missed or questioned in an audit
- Income recorded late, or only when deposits hit the bank, which throws off quarterly estimates
- No year-to-date profit and loss report, so owners guess what to pay each quarter
- Missing receipts and mileage logs that cannot support deductions
Reconciled monthly books in QuickBooks or Xero let you see your profit at any point and calculate an accurate estimate each quarter. That is exactly what our bookkeeping services deliver: clean categories, reconciled accounts, and reports you can hand straight to your tax preparer.
Frequently Asked Questions About Self-Employment Tax
Do I pay self-employment tax if I also have a W-2 job?
Yes, if your side business has $400 or more in net earnings. Your W-2 wages count toward the Social Security wage base, so if your wages already exceed it, you may owe only the Medicare portion on your self-employment income.
Is self-employment tax deductible?
Half of it is. You deduct the employer-equivalent half on Schedule 1 of Form 1040, which reduces your income tax. The full amount is not deductible, and it does not reduce the SE tax itself.
What happens if I do not pay estimated taxes?
You can owe an underpayment penalty, which the IRS calculates like interest on the shortfall for each quarter, in addition to the tax itself. Meeting a safe harbor generally avoids the penalty.
Do LLC owners pay self-employment tax?
Single-member LLCs taxed as sole proprietorships do, on all net profit. Multi-member LLCs taxed as partnerships generally do on members’ share of earnings. An LLC that elects S corporation status applies payroll tax to the owner’s wages instead.
This article is general information, not tax advice. Rates, wage bases, and thresholds change, and your situation depends on entity type, state, and other income. Verify current figures with the IRS and consult a licensed CPA or enrolled agent before making decisions.
Take the Guesswork Out of Self-Employment Tax
If you are not sure what to set aside each quarter, or you suspect your books are costing you deductions, we can help. Contact Ask For CPA for a conversation about monthly bookkeeping built around your tax picture, or see our pricing first.
