Quarterly Estimated Taxes for the Self-Employed: 2026 Deadlines and Safe Harbor

Freelancers, creators, sole proprietors, and partners don't have an employer withholding tax from every paycheck. The IRS expects you to pay as you go instead, in four estimated payments a year. Miss them and you can owe an underpayment penalty, even if you end up with a refund. This guide explains who must pay, the 2026 dates, and the safe-harbor rules that keep you penalty-free.

Who has to pay estimated tax

According to the IRS's Estimated Taxes page (last updated September 25, 2026), individuals, including sole proprietors, partners, and S corporation shareholders, generally must make estimated payments if they expect to owe $1,000 or more when they file. Corporations generally must pay if they expect to owe $500 or more.

If you also have a W-2 job, you may be able to skip estimated payments by increasing withholding on a new Form W-4. Form 1040-ES (2026) describes that option.

2026 estimated tax deadlines

Form 1040-ES (2026) lists these payment dates for the 2026 tax year:

You don't have to make the January 15, 2027 payment if you file your 2026 return by February 1, 2027 and pay the full balance with it. If a due date falls on a weekend or legal holiday, a payment made the next business day is on time.

As of this guide's publication, the next deadline is January 15, 2027.

Safe harbor: how to avoid the penalty

The IRS says you generally won't owe an underpayment penalty if either of these is true:

• You owe less than $1,000 after withholding and credits, or
• Your withholding and on-time estimated payments covered the smaller of 90% of your 2026 tax or 100% of the tax on your 2025 return. The 2025 return must cover all 12 months.

Higher earners: Form 1040-ES (2026) says that if your 2025 adjusted gross income was more than $150,000 ($75,000 if married filing separately in 2026), you substitute 110% for 100% in the prior-year test. This doesn't apply if at least two-thirds of your gross income comes from farming or fishing.

How much to pay each quarter

The prior-year safe harbor is the simplest method because you already know the number. These examples are illustrative arithmetic, not advice for your situation:

• Example A. Your 2025 total tax was $12,000 and your 2025 AGI was under $150,000. Paying 100% of last year's tax means $12,000 ÷ 4 = $3,000 per quarter.
• Example B. Your 2025 total tax was $40,000 and your 2025 AGI was over $150,000. The 110% rule applies, so $44,000 ÷ 4 = $11,000 per quarter.

Safe harbor protects you from the penalty, not from the bill. If 2026 is a much bigger year, you'll still owe the difference when you file. Keep that money in a separate tax-reserve account (see our guide to separating business and personal finances).

Don't forget self-employment tax

Estimated payments cover income tax and self-employment (SE) tax. The IRS's Self-Employment Tax page (last updated June 27, 2026) states:

• The SE tax rate is 15.3%: 12.4% for Social Security and 2.9% for Medicare.
• You must pay SE tax and file Schedule SE if your net earnings from self-employment were $400 or more.
• You can deduct the employer-equivalent portion of SE tax when figuring adjusted gross income. That reduces income tax, not SE tax itself.
• An Additional Medicare Tax of 0.9% applies above $200,000 (single), $250,000 (married filing jointly), or $125,000 (married filing separately).

For 2026, Form 1040-ES says the maximum earned income subject to the Social Security portion is $184,500. The Social Security Administration announced that figure in October 2025. It was $176,100 for 2025.

How to pay

The IRS lists these options:

• Online through your IRS online account or IRS Direct Pay
• By debit or credit card, or digital wallet, through approved processors (fees apply)
• Through EFTPS (Electronic Federal Tax Payment System). Some business payments are required to use it.
• By mail with a Form 1040-ES payment voucher. The U.S. postmark date counts as the payment date.

Most states with an income tax run their own estimated-payment system with different forms. Check your state revenue department separately.

If your income is uneven

Creators and seasonal businesses often earn most of their income late in the year. The IRS notes that you may be able to lower or eliminate a penalty by using the annualized income installment method on Form 2210, which matches payments to when you actually earned the money. The IRS also says penalties may be waived for casualties, disasters, or other unusual circumstances.