Key Takeaways
- As a W-2 employee, you pay half of Social Security and Medicare tax through withholding. As a self-employed taxpayer, you pay both halves through self-employment tax.
- Self-employment tax is 15.3% of your adjusted net earnings, and you also pay regular federal and state income tax.
- Being self-employed means taking on more tax responsibility, but you also get business deductions that employees don’t.
- The biggest practical change is quarterly estimated tax payments. No employer is withholding for you anymore.
These days, the 9-to-5 (“what a way to make a living,” in Dolly Parton’s famous words) is no longer the default setting for the American career.
In fact, in a recent survey, 59% of people said they would become entrepreneurs if they had the opportunity.
If quitting your 9-to-5 has been on your mind, I want to help you understand what your new relationship with the IRS would be if you become your own boss. So you can make your dream of entrepreneurship a reality without getting into a tax mess that could end up haunting you.
How does self-employment tax work?
When you transition from being a W-2 employee to becoming self-employed, instead of your Shakopee, MN employer calculating and sending your taxes to the IRS, you become responsible for the timing, math, and documentation of every tax dollar owed.
These are the biggest shifts you’ll experience:
1. The Self-Employment (SE) tax shift
In a traditional job, you pay 7.65% for Social Security and Medicare, and your employer matches it. When you are self-employed, you are both the employer and the employee, meaning you pay the full 15.3%.
The silver lining, though, is that you can typically deduct 50% of your self-employment tax on your Form 1040, which lowers your overall taxable income.
2. Taxed on profit, not revenue
You only pay income and self-employment tax on your net profit (your revenue minus your deductible expenses). So if you earn $100,000 but spend $20,000 on valid business expenses, you’re only taxed on the remaining $80,000.
3. Quarterly estimated tax payments
Since there is no payroll department to withhold taxes from your paycheck, the IRS requires you to make quarterly estimated tax payments. These are typically due in April, June, September, and January.
How much tax do you pay if you’re self-employed?
If you’re self-employed, you pay two layers of federal tax: self-employment tax and federal income tax (state income tax in most cases). How much you pay depends on your net profit, deductions, filing status, and total household income.
Those I talk to who are going off on their own usually just want to know a simple self-employment tax rate. But there are actually a few layers to the cake to consider.
How much you pay depends on:
- Self-employment tax for Social Security and Medicare
- Federal income tax is based on your taxable income and filing status
- State income tax, if your state imposes one
- In some cases, additional Medicare tax or local tax issues, depending on income and location
The self-employment tax piece is the one that feels most different coming from a W-2 world. It’s made up of a 12.4% Social Security tax and a 2.9% Medicare tax
That gives you the 15.3% figure. Which sits on top of your regular income tax calculation.
How do I calculate self-employment tax?
You start with net profit (rather than gross income), multiply it by 92.35%, and then apply the Social Security and Medicare rates.
Here’s the process I walk my Scott County clients through:
Step 1: Find your net profit
Start with your gross business income, then subtract your deductible business expenses. The equation is:
Revenue – Business Expenses = Net Profit
Step 2: Apply the 92.35% adjustment
Multiply that net profit by 92.35% to reflect the fact that an employer normally deducts its share of payroll taxes.
Net Profit × 0.9235 = Net Earnings Subject to SE Tax
Step 3: Apply the tax rates
Then you apply 12.4% for Social Security, subject to the wage base, and 2.9% for Medicare, generally with no wage cap.
Just to show you an example:
- Net profit: $100,000
- Adjusted amount: $100,000 × 0.9235 = $92,350
- Self-employment tax: $92,350 × 15.3% = $14,129.55
That’s roughly $14,130 you owe in self-employment tax.
That does not mean your total federal tax is $14,130. It’s just the self-employment tax portion before you even get into your regular federal income tax.
When do you pay self-employment tax?
You pay self-employment tax during the year through quarterly estimated tax payments, not in one lump sum when you file. If you wait until April to pay everything, you’ll likely owe underpayment penalties even if you can afford the full balance then.
As an employee, you were paying tax all year long. But you weren’t feeling it as a separate event because withholding happened automatically.
Once that stops, the IRS still expects a pay-as-you-go system. It’s just no longer automated for you.
So, you have to pay quarterly estimated taxes. The 2026 estimated tax deadlines are:
- April 15
- June 16
- September 15
- January 15 of 2027
Which means you’ll need to develop a habit of setting aside cash for taxes every time money comes in.
A good general rule to follow is reserving 25% to 30% of each payment you receive from a client for taxes. But the right number depends on your profit margins, state taxes, and household income.
This is a planning conversation, not a guessing game. So, if you’re seriously thinking about leaving your 9-to-5, it’s something we should sit down and figure out together.
What deductions are available if you’re self-employed?
When you’re self-employed, you can deduct ordinary and necessary business expenses. On top of that, certain deductions like health insurance, retirement contributions, and half of self-employment tax can reduce your taxable income even further.
This is the part of the conversation my clients tend to enjoy more.
A few of the major deduction categories available to you once you’re self-employed include:
- Home office expenses, if your space is used regularly and exclusively for business
- Equipment and software, such as computers, subscriptions, and tools
- Mileage and business travel
- Marketing and advertising
- Professional fees, including legal and tax prep fees connected to the business
- Education that maintains or improves your current business skills
- The Qualified Business Income deduction can reduce your taxable income by up to 20% of qualified business income, subject to the usual eligibility rules
There are also significant above-the-line deductions that can reduce adjusted gross income:
- Self-employed health insurance premiums, if you qualify
- Retirement plan contributions, such as a Solo 401(k) or SEP IRA
- Half of your self-employment tax
Of course, a doesn’t mean you’re getting reimbursed for the full expense. It just means you aren’t paying taxes on that dollar.
So don’t spend money just to get a tax break. Focus on expenses that actually grow your business, and then make sure you document them properly so the IRS doesn’t ask questions.
(And if you’re unsure whether a purchase really justifies a deduction, I can help you run the numbers.)
What records do self-employed taxpayers need to keep for tax purposes?
When you are self-employed, the burden of proof for every deduction falls on you. To satisfy the IRS and maximize your tax savings, you need to track expenses as they happen rather than guessing at tax time.
You need to maintain three main categories of records:
1. Core Financial Records
- Keep documents that prove your income, such as 1099-NEC forms, invoices, cash register tapes, and deposit slips.
- Save receipts, canceled checks, or electronic account statements that clearly show the amount paid, the payee, and the business purpose for purchases and expenses.
- Maintain separate bank accounts for business and personal use, and maintain all bank and credit card statements. This creates a clean audit trail and prevents the commingling of funds.
2. Specialized Deduction Tracking
- Mileage logs if you use a vehicle for business. You must track the date, mileage, and specific business purpose of every trip. (Digital apps are great for this.)
- Home office documentation. Keep records of your home’s total square footage versus your dedicated office space, along with utility bills, mortgage interest, or rent payments.
- Asset records for equipment like computers or machinery. Keep records of the purchase date, cost, and how much you used it for business versus personal use (to calculate depreciation).
Employment and Tax Returns
- Keep copies of your filed tax returns for at least three years. These help in preparing future returns and calculating estimated tax payments.
- Keep copies of any W-9s you collect from any contractors you hire, as you will need these to issue 1099s at year-end.
How does self-employment tax work compared to W-2 taxes?
Ultimately, the W-2 system hides most of the tax process from you. Self-employment puts that process in your hands. You gain flexibility and deductions, but you also take on the responsibility for withholding, recordkeeping, tax deposits, and planning.
As a W-2 employee, you’re largely a passenger in the tax system.
- Your employer withholds federal and state income tax
- Your employer splits Social Security and Medicare with you
- Payroll deposits the tax
- You get a W-2 at year end
- You generally file one individual return and reconcile what was already paid in
As a self-employed taxpayer, you’re running the tax side yourself.
- No one withholds taxes for you
- You pay both halves of Social Security and Medicare through self-employment tax
- You make estimated payments
- You track income and expenses
- You need records to support deductions
- You may need separate systems for bookkeeping, savings, and tax planning
But that heavier responsibility comes with more planning room too.
|
Tax issue |
W-2 taxpayer |
Self-employed taxpayer |
|
Social Security & Medicare |
Pays 7.65%; employer pays 7.65% |
Pays full self-employment tax, generally 15.3% |
|
Income tax payments |
Withheld automatically |
Paid through estimates and return filing |
|
Taxed on |
Wages |
Net profit |
|
Business deductions |
Very limited |
Broad range of ordinary and necessary expenses |
|
Recordkeeping |
Mostly payroll documents |
Must track income, expenses, and support |
|
Retirement options |
Employer plan, if offered |
Solo 401(k), SEP IRA, and other self-employed options |
|
Health insurance tax treatment |
Often through an employer plan |
May qualify for self-employed health insurance deduction |
|
Year-round tax management |
Mostly passive |
Active and ongoing |
Final thoughts
If you’ve been considering leaving your 9-to-5 to go out on your own, don’t let all the tax responsibilities intimidate you.
That’s why I’m in your corner.
I want to help make your entrepreneurial vision a reality without the stress of tax obligations weighing on you.
So, let’s sit down and make a plan. We’ll talk about when your W-2 income will stop, what your new business will realistically earn, and what we should do now so your first year of self-employment doesn’t end with a nasty April surprise.
FAQs
“Can I skip quarterly payments if I still have a part-time W-2 job?”
You might be able to skip separate quarterly payments if you increase the withholding at your W-2 job to cover the tax liability of your self-employment income. If your employer withholds enough to meet the safe harbor requirements (90% of your current year’s tax or 100% of last year’s tax), you can avoid underpayment penalties.
“What is the Qualified Business Income (QBI) deduction?”
The QBI deduction (Section 199A) allows many self-employed individuals to deduct up to 20% of their qualified business income from their federal income tax. It reduces your taxable income but doesn’t reduce your self-employment tax. Your eligibility depends on your total taxable income and the type of business you operate.
“How does self-employment tax work if I hire a contractor?”
When you pay an independent contractor $2,000 or more in a calendar year, you’re required to file Form 1099-NEC. To prepare for this, you should have every contractor fill out a Form W-9 before you pay them. While you don’t withhold taxes from their pay, the amount you pay them is a deductible business expense that reduces your own taxable profit.
“Is my health insurance premium fully deductible?”
Yes, if you are self-employed and have a net profit, you can typically claim the self-employed health insurance deduction. Unlike standard medical deductions, you do not need to itemize to claim it. However, you can’t claim this deduction for any month you were eligible to participate in a health plan subsidized by your employer or your spouse’s employer.
“What happens if I miss a quarterly tax deadline?”
If you miss a deadline, you should pay as much as possible as soon as possible. The IRS calculates underpayment penalties based on how much you owed and how late the payment was. Making a partial payment mid-quarter is always better than waiting until the next official deadline to catch up.
“Do I need a separate bank account for my business?”
While not legally required, maintaining a separate business bank account is something I highly recommend. It creates a clean audit trail, prevents the commingling of personal and business funds, and makes it significantly easier to track deductible expenses and prove income if the IRS requests documentation.