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quarterly taxes

Q&A: Are IRS quarterly payments mandatory?

May 25, 2026 By Liz Weston 2 Comments

Dear Liz: I live totally on my investment income. I receive the majority of my income at the end of the year, mostly dividends from my brokerage account.

A couple of years ago, when talking to an IRS agent about another matter, I asked when I should make my estimated tax payment. I was told that I had to make the payments quarterly. This year, when I was talking to my accountant, she told me that I could make a lump-sum payment at the end of the year without incurring a penalty. Who is correct, the IRS agent or my accountant?

Answer: Ours is a pay-as-you-go system, and the IRS assumes that your income is received evenly throughout the year, says Mark Luscombe, principal analyst for Wolters Kluwer Tax & Accounting. Therefore, the agency typically expects four estimated tax payments of roughly equal size, with the payments due April 15, June 15, Sept. 15 and Jan. 15. If the payments aren’t made as expected, you can get hit with an underpayment penalty.

However, the IRS allows a taxpayer to show that their income is not earned equally throughout the year by filing a Form 2210 with a related Schedule AI (Annualized Income Installment Method), Luscombe says. Schedule AI allows you to show when income was earned during the year so you can match your estimated payment dates to when you actually received the money.

Schedule AI is more work, since it requires you to report adjusted gross income for each of the four quarters, as well as your itemized deductions and other tax details items, Luscombe notes. But if your income comes at the end of the year and the corresponding estimated tax payment was made on Jan. 15 of the following year, filing this paperwork may be sufficient to avoid a penalty for underpaying estimated taxes, he says.

Filed Under: Q&A, Taxes Tagged With: avoiding tax penalties, estimated tax payments, IRS, quarterly tax payments, quarterly taxes, tax penalties, tax penalty

Q&A: How to calculate your estimated quarterly taxes

September 1, 2014 By Liz Weston

Dear Liz: I recently retired and started my own consulting business, which is doing very well. My question is on taxes. I have been told that I must pay quarterly taxes, but I have no idea if I will make $10 this month or $10,000. How do I estimate my income if I have no idea? Can I just wait till the end of the year and figure it out then?

Answer: You don’t want to do that. If you owe a significant amount at the end of the year, you’ll owe a substantial penalty on top of your tax bill.

The good news: The IRS requires you to figure your estimated quarterly taxes, not your “guesstimated” taxes. You’ll make the calculations based on what you actually earned that quarter, not what you expect to earn in the upcoming quarter.

Tax software programs such as TurboTax and TaxAct can help you make the calculations, but you’d be smart to hire a tax pro with experience advising small-business owners. The pro will have ideas about how to minimize and manage your tax bill. He or she also will be available to answer the many questions you’ll have about taxes, incorporation and other matters as your business grows. If you should be audited, a tax professional such as an enrolled agent or a certified public accountant would be able to represent you. (Even the most avid do-it-yourselfer should understand that representing yourself in an audit is not a good idea.)

You can get referrals from the National Assn. of Enrolled Agents at http://www.naea.org and the American Institute of CPAs at http://www.aicpa.org.

Filed Under: Q&A, Taxes Tagged With: q&a, quarterly taxes, Taxes

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