You left a job, or you never had one, and now the money arrives with nothing taken out of it. That part feels good for about a year. The part nobody explains until you are already in it is that a tax you have been paying your whole working life has just become visible, and it is bigger than you think.

This is not the whole of your first year. It is the four things that surprise people, in the order they tend to surprise them.

The tax you were always paying, and never saw

Self-employment tax is 15.3% of your net earnings. It is not a new tax and it is not a penalty for working for yourself. It is Social Security and Medicare — 12.4% and 2.9% — the same two things that came out of every paycheck you ever received.

What changed is who pays it. As an employee you paid half. Your employer paid the other half, and that half never appeared on your pay stub, so for most people it may as well not have existed. Now both halves are yours.

Where the 15.3% comes from

The rate did not change when you went self-employed. The number of halves you can see did.

AS AN EMPLOYEE 7.65% WITHHELD 7.65% PAID BY YOUR EMPLOYER SELF-EMPLOYED THE WHOLE 15.3%, PAID BY YOU SOLID — MONEY YOU CAN SEE LEAVING · FADED — PAID ON YOUR BEHALF
The employer half is the part that catches people out. It was never a benefit anyone described to you, so losing it does not feel like losing anything — until the first bill.

It is smaller than 15.3% sounds

Two reductions are built into the arithmetic, and both are easy to miss because they happen in the middle of a form rather than at the end.

First, you do not pay it on everything. Self-employment tax applies to 92.35% of your net profit, not all of it — a deliberate adjustment that puts you roughly where an employee stands. Second, half of what you calculate comes back off the income you are taxed on. It does not reduce the self-employment tax itself, only your income tax.

On $60,000 of net profit that works out at about $8,478 of self-employment tax, of which roughly $4,239 is deductible against income tax. The headline rate is 15.3%; the actual bite on profit, before the deduction does anything, is nearer 14.1%.

One ceiling worth knowing about now rather than later: the 12.4% Social Security half stops once your combined wages and net earnings pass $184,500 for 2026. The 2.9% Medicare half has no ceiling at all, and an extra 0.9% starts above $200,000 for a single filer.

A tradesman coiling cable at the open back doors of his work van on a residential street.
Year one is usually the year you buy the van, the tools and the insurance. It is also the year the equipment write-offs are largest, which softens the first tax bill more than most people expect.

Two taxes, one return — and they start in different places

Income tax and self-employment tax are calculated separately and they do not begin at the same point. This is the single most common source of the but I barely earned anything phone call.

Income tax has the standard deduction in front of it: $16,100 for a single filer in 2026, $32,200 filing jointly. Self-employment tax has $400. That is not a typo. Once your net earnings from self-employment clear four hundred dollars, the 15.3% applies, regardless of how far you are from owing any income tax at all.

So a person with $12,000 of profit and no other income owes no federal income tax — the standard deduction is larger than everything they made — and still owes about $1,696. Both of those sentences are true at once, and the second one is the one that arrives unannounced.

A blank form, a pen, a small stack of unopened envelopes and a mug of coffee on a wooden desk, photographed from directly above.
Two separate calculations on one return, starting at two different numbers. The $400 threshold is the one nobody mentions while you still have an employer.

Year one is the easiest safe harbor you will ever get

Quarterly estimated payments are the other new thing, and the rule that governs them is unusually kind in your first year.

The underpayment penalty cannot touch you if you pay 100% of the total tax on last year’s return — 110% if your prior-year adjusted gross income was over $150,000 — spread across the four payment dates. Note what that number is: last year’s tax, which is already printed on a form you have. Not a forecast of this year, which in your first year you have no way of making.

And if last year you were an employee on a modest salary, that figure is probably small relative to what you will earn now. You are allowed to pay it, be fully protected from the penalty, and settle the difference in April.

The catch is worth stating plainly, because plenty of writing on this leaves it out: the safe harbor protects you from the penalty, not from the bill. Everything you did not pay during the year is still due on April 15. If you use the safe harbor to pay a small amount all year, put the difference somewhere you will not spend it.

There is also a genuine exemption, though it applies to fewer people than the internet suggests. If you had no tax liability at all for the prior year — total tax of zero, or no requirement to file — and you were a US citizen or resident for the whole of that year, and that year was a full twelve months, you owe no estimated tax this year. A student in their first year of freelancing may well qualify. Someone who left a salaried job almost certainly does not, because withholding means they had a liability.

The 20% you get without asking

The qualified business income deduction lets most self-employed people deduct up to 20% of their business income. You do not have to itemize to take it, and in your first year you are almost certainly below the point where the complicated rules start — $197,300 of taxable income for a single filer in 2026, $394,600 filing jointly.

New for 2026: if you have at least $1,000 of qualified business income from an active trade or business, there is a minimum deduction of $400.

What to actually do in the first month

Four things, in the order they pay off.

Set aside a percentage, not an amount. A fixed monthly transfer breaks the first time a month is quiet or enormous. A percentage of every payment as it lands does not. Our guide on how much to set aside has a calculator for the number.

Open a separate account. Not because the law requires it — for a sole proprietor it does not — but because the alternative is reconstructing a year of mixed transactions in April.

Start the mileage log on day one. This is the only item on the list you cannot fix later. Deductions can be found in a bank statement; a trip you took in March cannot be remembered in January.

Collect a W-9 from anyone you pay. If you pay a contractor $2,000 or more across the year you owe them a 1099-NEC by January 31, and you cannot file one without their taxpayer ID. That threshold went up from $600 for payments made in 2026, so most of what is written about it online is now wrong. Ask when you hire someone, not in January.

Where this stops

Everything above is federal. Your state may want estimated payments too, on its own schedule, and a few cities do as well. And the moment your situation involves an entity, employees, or income in more than one state, the arithmetic here stops being sufficient and a professional becomes worth considerably more than they cost.

BrassWell handles the set-aside part — a percentage of every payment moved out of reach as it arrives, so the quarterly dates are a transfer rather than a scramble. It does not file anything for you and it is not a substitute for an accountant in the year you need one.

Questions, answered

Do I have to pay self-employment tax in my first year?

Yes, if your net earnings from self-employment are $400 or more. That threshold is separate from and far below the income tax standard deduction, which is $16,100 for a single filer in 2026. It is possible to owe no federal income tax at all and still owe self-employment tax.

How much is self-employment tax?

15.3% of your net earnings: 12.4% for Social Security and 2.9% for Medicare. It applies to 92.35% of your net profit rather than all of it, and half of the resulting tax is deductible against your income tax. The Social Security portion stops at $184,500 of combined wages and net earnings for 2026; the Medicare portion has no ceiling.

Do I have to make quarterly payments in my first year of self-employment?

Generally yes, if you expect to owe $1,000 or more. The exception is if you had no tax liability at all for the prior year, you were a US citizen or resident for that whole year, and that year covered twelve months. Someone who left a salaried job usually does not qualify, because withholding means they had a liability.

What is the safe harbor for estimated taxes?

Paying 100% of the total tax shown on last year’s return across the four payment dates, or 110% if your prior-year adjusted gross income was over $150,000, protects you from the underpayment penalty however much you earn this year. It does not reduce what you owe; the balance is still due on the April filing deadline.

Sources

  1. Self-employment tax (Social Security and Medicare taxes) — IRS. The 15.3% rate and its two parts, the $400 filing threshold, the deductible employer-equivalent half, and the additional Medicare tax thresholds.
  2. Estimated taxes — IRS. The $1,000 threshold, the prior-year safe harbor, and the conditions for owing no estimated tax at all.
  3. Contribution and benefit base — Social Security Administration. The $184,500 ceiling on the Social Security portion for 2026.
  4. Tax inflation adjustments for tax year 2026 — IRS. The 2026 standard deduction: $16,100 single, $32,200 married filing jointly.
  5. Qualified business income deduction — IRS. The 20% deduction, the 2026 taxable income thresholds, and the new $400 minimum deduction.

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General information, not tax advice. The 2026 figures here were checked against the IRS and the Social Security Administration and change from year to year. State and local estimated tax rules are separate from the federal ones described here. For anything specific to your situation, talk to a tax professional.