Lesson 3 of 7
Self-Employment Tax
Albert had his best year ever.
He left his old HVAC company in January and went out on his own. By December he had $78,000 in revenue and roughly $58,000 in profit after expenses. He was proud. He was finally free. He was going to celebrate.
Then he sat down with Ralph in March.
The bill was $14,200.
Albert went quiet. “How?” he said. “I saved some money. I thought…” He stopped.
“Nobody told you about self-employment tax,” Ralph said.
Albert shook his head. Nobody had.
This story happens in tax offices across America every single year. A person has a great first year in business. They didn’t know about self-employment tax. April arrives. The bill is bigger than they thought possible. This is one of the most important things you will ever explain to a self-employed client — and ideally you explain it before they’re sitting across from you staring at a $14,000 bill.
💬 Words You'll Hear in the Office
Self-Employment TaxThe 15.3% tax on net profit that self-employed people pay for Social Security and Medicare
FICA SplitWhen you work for a company, you pay 7.65% and they pay 7.65% — when you work for yourself, you pay both sides
Net ProfitBusiness income minus business expenses — this is what SE tax is calculated on
Schedule SEThe IRS form used to calculate self-employment tax — attaches to the 1040
Deductible HalfThe IRS lets self-employed people deduct half of their SE tax from gross income — a small break for paying both sides
Why Self-Employed People Pay More
When Anthony works at Amazon, he pays 7.65% in FICA taxes — Social Security and Medicare. Amazon pays another 7.65% on his behalf. Anthony never sees Amazon’s share. It just gets paid. Together, 15.3% goes toward his Social Security and Medicare from every paycheck.
When Albert works for himself, there is no Amazon. There is no employer to pay the other half. Albert pays both sides himself. The full 15.3%. That’s self-employment tax. It’s not instead of income tax — it’s on top of income tax. Two separate bills.
💵 Albert’s First Year — What He Owed and Why
Business revenue$78,000
Business expenses (parts, truck, tools, fuel)− $20,000
Net profit — what SE tax is calculated on$58,000
Self-employment tax (15.3% of 92.35% of profit)$8,196
Federal income tax on taxable income$6,004
Total federal tax bill$14,200
Total amount he had set aside$2,800
Amount he didn’t plan for$11,400
The Deductible Half — A Small Consolation
The IRS does give self-employed people a small break. You can deduct half of your self-employment tax from your gross income when calculating AGI. It doesn’t eliminate the SE tax. It just reduces the income the income tax is calculated on by half the SE amount. It’s something — but it doesn’t change the overall picture much for someone who didn’t plan at all.
The Good News — Business Expenses Reduce SE Tax
Here’s where you can actually help Albert. Self-employment tax is calculated on net profit, not revenue. Every legitimate business expense that reduces his profit also reduces his SE tax. Albert spent $20,000 on parts, fuel, and tools. That saved him not just income tax but also SE tax on $20,000 of profit. That’s real money.
Getting Albert to track his expenses properly — every receipt, every mile, every tool — is one of the most valuable things you can do for him. Not just for this year. For every year going forward.
💬 Albert’s Hard Conversation
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Albert
I don’t understand. I made $58,000 in profit. How do I owe $14,000?
RM
Ralph
Because when you work for yourself, you pay both sides of Social Security and Medicare. At a company, they pay half for you. On your own, you pay all of it — 15.3% of your profit. That’s $8,200 just in self-employment tax before we even get to income tax.
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Albert
Nobody told me that when I went out on my own.
RM
Ralph
Almost nobody does. Here’s the important thing going forward: this is completely manageable if you plan for it. We set up quarterly payments, you put aside roughly 30% of every job you get paid for, and you never face a surprise like this again.
RM
Ralph
About that. It sounds like a lot but you’re already paying it — you just didn’t know it was coming. The difference is whether you plan for it or get blindsided by it.
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Real Office Scenario
A client comes in mid-year — not tax season, just a consultation. She just went out on her own as a freelance graphic designer. Her first two months were great. She made $8,000 and she’s excited.
You have the Albert conversation with her now, before April. You explain self-employment tax. You help her set up quarterly payments. You tell her to put 30% of every check aside before she spends anything.
She is not Albert sitting across from you in March staring at a $14,000 bill. She’s a client who was protected because her preparer got ahead of it. That’s the job.
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Common Beginner Mistake
Forgetting to check whether a new self-employed client made quarterly payments. If Albert comes in and you find out he made zero estimated payments all year, you know the bill is going to be big. Prepare him before you show him the number. Don’t let the number be a surprise if you can see it coming.
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Slow Down & Ask Questions
Any time a client mentions they went out on their own this year, stop everything and have the SE tax conversation. Not after you run the return. Before. Ask when they started. Ask what their revenue looks like. Ask if they’ve been setting money aside. Those answers tell you how the appointment is going to go.
📋 From the Desk of Ralph Martinez
Albert is a real client. I still see him every year. After that first year we got him on quarterly payments, got his expense tracking organized, and it never happened again. That first conversation was hard. Every conversation since has been fine. That’s what good tax prep does — it fixes the problem and prevents it from happening again.
— Ralph Martinez · Ruskin, FL · Est. 2001