When are Quarterly Taxes Due: Dates to Circle in Red

tax day

This article was written by Jennifer Clark, Content Marketing Manager at TaxJar.

(Remember, this post is for educational purposes only. For tax advice related to your specific business, be sure to consult a reputable accountant).

Before you started your own business, chances are you thought of Tax Day as just April 15. But now, there are tons of tax deadlines that require your attention. This post will help you navigate the new calendar by highlighting the most important tax dates to remember as a small-business owner.

A couple of things to keep in mind: This list is aimed toward sole-proprietors and business owners who don’t pay payroll tax and use the calendar year (as opposed to the fiscal year) as their tax year. If you own a larger or more complex business, you may be liable for more taxes.

Check out the IRS’s meticulous tax calendar for more info. Remember, this post is for educational purposes only. Consult a reputable accountant (read our post about how to find someone good) for tax dates that might apply to your specific business.

Date Tax Due
January 31, 2019 1099- MISC due to Contractors
February 28, 2019 1009- MISC due to IRS (for each contractor)
March 15, 2019 S Corporation Tax
April 15, 2019 Personal Income Tax
April 15, 2019 Quarterly Estimated Tax
June 17, 2019 Quarterly Estimated Tax
September 16, 2019 Quarterly Estimated Tax
January 15, 2020 Quarterly Estimated Tax


Income tax due dates:

Income tax is generally what we think of when we think of tax. While this is the most labor-intensive tax due date, it fortunately also rolls around just once a year.

March 15, 2019: This is the tax due date for corporations and “S” corporations. And yes, it falls a whole month before the “usual” income tax due date. Keep in mind that you file a separate tax return for corporate tax, and your personal income tax will still be due on April 15.

April 15, 2019: Just as it was before you put on your small-business-owner hat, this is still the most “famous” of all sales tax due dates. If you’re a sole-proprietor or a single-member LLC, then your income tax is due this day. Personal income tax is also due on the same day.

Quarterly estimated tax due dates:

The United States has a pay-as-you-go income tax system. Since you don’t have an employer submitting tax on your behalf each pay period, the IRS (and mostly likely your state’s department of revenue) wants a quarterly payment from you. Below are the quarterly estimated tax payment due dates for 2019:

April 15, 2019: Not only is this the income tax due date, it’s the due date for your first quarterly estimated tax (QET) payment. In April, you’ll pay quarterly estimated taxes on the income you made in January, February, and March 2019.

June 17, 2019: This is when you’ll pay quarterly estimated taxes on the income you made in April, May, and June 2019. This due date falls in the middle of June, so you’ll want to do a little extra estimating to ensure you pay the right amount for this quarter.

September 16, 2019: Quarterly estimated taxes for the months of July, August, and September 2019 are due on this date. Just as in June, these quarterly estimated taxes are due within the quarter.

January 15, 2020: Quarterly estimated taxes for the months of October, November, and December 2019 are due on this date.

Sales tax due dates:

Your sales tax due dates come down to your individual sales tax situation. States require sellers to pay at intervals — usually monthly, quarterly, or annually — and every state is different. You’ll be assigned sales tax filing due dates when you apply for your sales tax permit at your state’s department of revenue.

1099 due dates:

If you hire contractors, you may be required to send them a form 1099-MISC (here’s our explainer on this form) to report their income. This form goes to the contractor and the IRS. Some states also require you to report contractor income.

January 31, 2019: This is the date form 1099-MISC is due to contractors. This gives them a chance to confirm what you’ve paid them with their own records.

February 28, 2019: This is the date you must submit form 1099-MISC to the IRS for each contractor.

Tax extension due dates:

If you wish to file a tax extension, you must file by April 15, 2019.

Fortunately, nearly every tax extension is granted with no questions asked, and you’ll have six more months to prepare your income tax paperwork and filing. Unfortunately, a tax extension doesn’t grant you an extension on time to pay. So you’ll have to estimate the amount you owe for the year and pay that by April 15, tax extension or not.

October 15, 2019: If you filed a tax extension, this is the final due date for your income tax filing.

If you have a corporation or S corporation, your due date to file an income tax extension is March 15, 2019, and your final due date to file your income tax after an extension is September 16, 2019.

Do you have employees? The IRS publishes an employer’s tax calendar with important dates. Don’t forget to check with your state’s department of revenue for any state-related tax due dates, too.


About TaxJar

TaxJar is a service that makes sales tax reporting and filing simple for more than 10,000 online sellers. Try a 30-day-free trial of TaxJar today and eliminate sales tax compliance headaches from your life.


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