How Do Estimated Quarterly Tax Payments Work?

Being self-employed has many benefits, but it also comes with the added responsibility of managing your own taxes, because there is nobody else there to manage them for you.

Paying taxes quarterly is important, and it is also required once you make a significant amount of income as a self-employed person or a 1099 contractor. In case you did not know, there are underpayment and late payment penalties waiting if you pay after the due dates.

When you are an employee of someone, it’s your employer’s responsibility to ensure that federal and state taxes are being withheld from your paychecks. On the other hand, this responsibility falls to you if you’re self-employed, or operate a business as a sole proprietor or partner, or are a pass-through corporation shareholder.

Estimated taxes refers to the amount taxpayers are responsible for paying on earnings that aren’t subject to withholding. This includes income not only from self-employment but other sources as well, such as rent, alimony, dividends, and awarded money. Capital gains and prize money land in the same category.

According to The IRS:

Taxes must be paid as you earn or receive income during the year, either through withholding or estimated tax payments. If you don’t pay enough tax through withholding and estimated tax payments, you may have to pay a penalty. You also may have to pay a penalty if your estimated tax payments are late, even if you are due a refund when you file your tax return.

Who Has to Pay Quarterly Taxes?

For individuals who have incorporated their business and expect their tax burden to exceed $500 by the year’s end, or for those filing as a sole proprietor or partnership who expect their tax burden to exceed $1,000 by the year’s end, the IRS mandates estimated quarterly tax payments.

That $1,000 threshold catches more people than you might expect. It applies to partners, S corporation shareholders, freelancers, and anyone with a side gig. W-2 employees can end up owing estimated tax too, usually when investment income or rental income is not covered by what comes out of their paycheck.

There is a genuine exemption, though. You can skip estimated payments entirely when you had no tax liability at all in the prior year. That prior year does have to cover a full 12 months, and you need to have been a U.S. citizen or resident alien throughout it.

One of the more costly misconceptions often held by those who are self-employed is that they can pay their taxes at the end of the year in one lump sum. In reality, failing to pay estimated quarterly taxes by the due dates may result in penalties and interest.

When Are Quarterly Tax Payments Due?

Deadlines for estimated quarterly taxes are as follows:

April 15, June 15, September 15, and January 15

If any of these dates fall on a weekend or holiday, the deadline is moved to the following workday. Now, if you’re looking at these dates and thinking, “Wait a minute, those are not uniform three-month increments: there’s only two months between the April and June deadlines, and four months between the September and January deadlines,” you are correct. In this sense, “quarterly taxes” is somewhat of a misnomer.

Each date covers a specific earning period rather than a calendar quarter. The April payment covers January through March, June covers April and May, September covers June through August, and the January payment covers everything from September through the end of December.

Nothing stops you from paying more often than four times a year, either. The IRS only cares that enough has arrived by the end of each period, so monthly payments are perfectly fine if smaller amounts are easier on your cash flow.

How Much Should You Send Each Quarter?

You can generally avoid an underpayment penalty by paying at least 90% of what you end up owing for the current year, or 100% of what you owed last year, whichever of those two is smaller. That second figure climbs to 110% if your adjusted gross income last year topped $150,000, or $75,000 filing separately.

Most people find last year’s number easier to work with, since it is already sitting on a return you filed. Take that total and divide it by four. That is your quarterly payment.

Income that swings around during the year makes the math harder. In that case you can annualize instead, estimating your liability each quarter based on what you have actually earned so far. Form 1040-ES walks you through either approach.

If you’re self employed, remember that you’re responsible for paying not only federal income tax but also a 15.3 percent self-employment tax that covers the amount an employer would withhold for Social Security and Medicare. That rate breaks into 12.4% for Social Security and 2.9% for Medicare, and the Social Security half stops once your net earnings pass the annual wage base, which was $176,100 for 2025. Remember too that state taxes must be factored into your tax equation.

What Happens If You Miss a Deadline?

Another misconception is that if the quarterly payment due date is missed that the best course of action is to combine the now-delinquent payment with the pending quarter’s payment at the next deadline. Instead, taxpayers who miss the quarterly deadline should send payment as soon as possible, appealing any penalties. (The IRS, being less concerned with collecting penalties and more concerned with collecting taxes, can be fairly forgiving.)

Form 2210 is where you calculate what you owe for underpaying, and it is also where you explain unequal payments. The IRS does waive the penalty in a couple of situations. A casualty or disaster can qualify, along with any other unusual circumstance that would make the penalty unfair. Retiring after age 62 or becoming disabled during the year also counts, as long as the shortfall came from reasonable cause rather than neglect.

How Do You Actually Pay?

Estimated payments should be sent with an IRS Form 1040-ES. For more on where to send this, please see our where to file instructions here.

Paying them is genuinely easy. Most people use the Electronic Federal Tax Payment System, though your online IRS account works just as well, and so does IRS Direct Pay or the IRS2Go app. Debit and credit cards are accepted but carry an extra fee. Sending in paper forms to the IRS is still an option if you would rather do it that way.

Tools That Make This Easier

Thankfully there are lots of tools that help. Many banks and online banking platforms now offer dedicated accounts meant for tax payments, which keeps the money separate from your operating cash. You can also use a spreadsheet to assign a percentage of your earnings and move it over as you get paid.

The more detailed your records, and the more consistently you pay on time, the more peace of mind you get out of it. You also stop spending extra money on penalties you never needed to pay in the first place.

If you have not paid taxes quarterly before, that is okay. Moving forward it is best to plan ahead, so that when tax time comes you already have a good idea of your total withholdings and what you paid in.

Note: Tax laws may change with little notice. We do our best to keep this information current, but it is provided on an “AS IS” basis. It should not be considered, legal, financial, or other professional guidance. For more, see our terms.