Estimated Taxes in Your First Year of Self-Employment

A first year of self-employment usually has one safe harbor, not two. The prior-year route needs a full 12-month prior tax year and a filed return¹, so only 90% of this year's total tax² is available.

The estimated tax calculator asks whether a full-year prior return was filed. Answer no and it drops the prior-year cap, leaving the current-year target to carry the whole plan.

The statute closes the second route

IRC §6654(d)(1)(B) sets the required annual payment as the smaller of two figures, then withdraws the second one in its closing sentence: “Clause (ii) shall not apply if the preceding taxable year was not a taxable year of 12 months or if the individual did not file a return for such preceding taxable year.”

Clause (ii) is 100% of last year's total tax³. Two conditions have to hold together, and both are about the prior year rather than the current one.

Your prior tax year	The prior-year safe harbor
12 months, return filed	Available
12 months, no return filed	Closed
Shorter than 12 months	Closed
No prior tax year at all	Closed

The test says nothing about self-employment. Someone who spent last year in a salaried job, filed a full-year return for it, and started freelancing this year keeps both routes. The prior-year figure is that person’s total tax for the salaried year, most of which was withheld from a paycheck.

The people the rule actually catches are narrower than “first-year freelancer” suggests: a first US tax return, a short first tax year, or a prior year for which no return was filed.

What is left is an estimate of a year that has not finished

90% of this year's total tax² is measured against a number nobody knows in January. That is the practical difficulty of a first year, and it is a forecasting problem rather than a legal one.

Two features of the arithmetic make the forecast harder than it looks. Self-employment tax sits on top of income tax. And the employer half of payroll tax, invisible on a paycheck, is now yours.

Self-employment tax is part of the total

The IRS states the scope plainly: estimated tax covers “not only income tax, but other taxes such as self-employment tax and alternative minimum tax.”

Topic 554 describes the rate: “The law sets the self-employment tax rate as a percentage of your net earnings from self-employment. This rate consists of 12.4% for Social Security and 2.9% for Medicare taxes.” The same page sets the entry point: “You usually must pay self-employment tax if you had net earnings from self-employment of $400 or more.”

The Social Security part is capped, and the cap moves. Topic 554: “The law sets a maximum amount of net earnings subject to the Social Security tax. This amount changes annually.” The amount for a given year is printed in that year’s Schedule SE instructions, which is why it is not repeated here.

One offset reduces the total. Topic 554 again: “When figuring your adjusted gross income on Form 1040, Form 1040-SR, or Form 1040-NR, you can deduct one-half of the self-employment tax.”

A small first year may owe no penalty anyway

Below both harbors sits an exception that removes the penalty entirely. IRC §6654(e)(1) imposes no addition to tax when the balance shown on the return, after withholding and refundable credits, is under $1,000⁴. The $1,000 rule sets out how that balance is measured.

A separate exception in IRC §6654(e)(2) covers a prior year with no tax liability. It asks for the same full 12 months, plus US citizenship or residence. A short prior year fails it for the reason it fails the harbor.

Withholding from any other income still counts

A first self-employed year rarely stands alone. A W-2 job for part of the year, a spouse’s wages, a pension or a retirement distribution all carry withholding, and withholding counts as paid in equal parts on each of the four installment dates⁵.

That crediting rule gives a household with one salaried earner a lever a sole freelancer does not have. Withholding instead of estimated tax payments sets out how far it reaches.

The four periods are not four quarters

The second period runs from January 1 through May 31. The June installment therefore covers five months of income and the April installment covers three. A first year that starts slowly and accelerates back-loads a great deal, which is the case the annualized income method exists for.

This page covers federal estimated tax only; a state with an income tax sets its own first-year thresholds, forms and dates.

Do I need to pay estimated taxes in my first year of freelancing?

Yes, if you expect to owe $1,000⁴ or more after withholding and refundable credits. The IRS states the test as expecting “to owe tax of $1,000 or more when their return is filed.”

What if I didn’t file a return last year?

The prior-year safe harbor is not available. IRC §6654(d)(1)(B) withdraws it when “the individual did not file a return for such preceding taxable year”, which leaves 90% of this year's total tax² as the only target.

My first self-employed year is not my first tax year. Can I use last year’s tax?

Yes, if that prior year ran a full 12 months and you filed a return for it. The statute asks about the length of the year and about the filing, not about the kind of income in it.

I had no tax liability last year. Does that excuse me?

IRC §6654(e)(2) removes the penalty when the prior year covered 12 months, showed no liability, and you were a US citizen or resident throughout. A part-year prior year does not qualify.

Does estimated tax include self-employment tax?

Yes. The IRS describes estimated tax as covering “not only income tax, but other taxes such as self-employment tax and alternative minimum tax.” The required annual payment is measured against total tax, not against income tax alone.

What happens if my first-year estimate turns out to be too low?

The addition to tax is charged on each installment for the period it stayed short. How the underpayment penalty works sets out the mechanism, and raising withholding before December 31 is the one credit that reaches back to earlier dates.