Tax season shouldn’t involve scrambling to find a form the night before it’s due. Whether you’re running a business or filing as an individual, knowing the important tax dates and deadlines throughout the year gives you room to plan ahead instead of just reacting under pressure. In this guide, we break down the key dates you need on your radar, from January through the end of the year.  

Why Tax Deadlines Matter 

Missing a tax deadline can mean penalties, interest, and a lot of unnecessary stress. The good news is that most deadlines follow a predictable pattern each year, so once you know them, you can build your calendar around them instead of getting caught off guard. 

One thing worth keeping in mind as you read through these dates: if a deadline falls on a weekend or holiday, it automatically moves to the next business day. That happens more often than you’d think, so always double check the exact date for the current year rather than assuming it’s set in stone. 

Important Tax Dates and Deadlines Throughout the Year for Individuals 

Whether you’re a salaried employee, a freelancer, or somewhere in between, there are several dates and deadlines throughout the year that apply to you. Some are about filing, some are about paying, and a few do both at once. Here’s what to put on your radar. 

January 15: Fourth quarter estimated tax payment due. If you’re self-employed, freelance, or otherwise don’t have taxes withheld from your income, this is the final estimated payment for the previous tax year. Remember, this date shifts to the next business day if it lands on a weekend or holiday. 

A quick note for farmers and fishermen: if at least two thirds of your income comes from farming or fishing, you have some flexibility here. You can either pay all your estimated taxes in one lump sum by January 15, or skip estimated payments altogether and file your complete return by early March instead. 

January 31: W-2s and 1099s sent. Employers are required to send W-2s by this date, and most 1099 forms (covering contractor pay, interest, dividends, and more) go out around the same time. If this date falls on a weekend, you may not see your forms until the following business day. 

April 15: Several big deadlines. 

• Individual tax returns are due. 

• If you need more time, this is also the deadline to file Form 4868 for a six month extension (remember, an extension gives you more time to file, not more time to pay). 

• IRA and HSA contributions for the previous tax year must be made by this date. 

• Your first quarterly estimated tax payment of the year is also due. 

June 15: Second quarter estimated tax payment due. 

September 15: Third quarter estimated tax payment due.  

October 15: Extended individual returns due. If you filed for an extension back in April, this is your new filing deadline. 

December 31: Required minimum distributions due. If you’re 73 or older, this is the deadline to take your required minimum distribution from retirement accounts for the year. 

Important Tax Dates and Deadlines Throughout the Year for Businesses 

If you own a business, you’ve got a separate set of deadlines to manage on top of your individual filing obligations. Business tax deadlines vary depending on how your company is structured, so it pays to know which dates apply to you. The dates below reflect standard deadlines, so always confirm the exact date for the current year, since any deadline that falls on a weekend or holiday moves to the next business day. 

January 31: W-2s and 1099s due to employees and contractors. Most businesses file electronically these days, but if you’re submitting paper 1099s to the IRS, that deadline typically falls a bit later, in early March. 

March 15: S Corp and Partnership returns due. Because these are pass-through entities, their income flows to the owners’ personal returns, which is why they are due a month earlier than other business types. You can request a six-month extension using Form 7004, but any taxes owed still need to be paid by this date. 

April 15: C Corp returns due. This is the deadline for C Corporations to file Form 1120, or request an extension. As with the S Corp and Partnership deadline, an extension buys you more time to file, not more time to pay.  

September 15: Extended S Corp and Partnership returns due.  

October 15: Extended C Corp returns due. 

The dates above cover the most important deadlines for most individual and business filers, but they don’t cover every situation. For a comprehensive view of the important tax dates and deadlines throughout the year, view IRS Publication 509. 

Frequently Asked Questions 

Even with a clear calendar in front of you, tax deadlines can raise a lot of questions. Here are answers to some of the most common ones.  

What if I miss a tax deadline? 

File and pay as soon as you can. Interest and penalties typically start adding up the day after a deadline passes, so the longer you wait, the more it costs. If you’re due a refund, there’s usually no penalty for filing late, but you generally only have three years to claim it before it becomes property of the U.S. Treasury. 

Does filing an extension give me more time to pay? 

No. An extension gives you more time to file your return, not more time to pay what you owe. You’ll still need to estimate your tax bill and pay it by the original deadline to avoid penalties. 

What if I made a mistake and need to amend my return? 

You don’t need to start over. You can file an amendment using Form 1040-X, along with copies of any forms or schedules you’re changing. Just make sure your original return has been accepted before filing the amendment.  

What if the tax filing deadline falls on a weekend? 

Then the deadline moves to the next business day. This applies to a few of the deadlines on this list, which is one more reason it’s worth double checking the exact date each year rather than going off memory. 

What if I need help filing my tax return? 

You don’t have to figure it out alone. A year-round tax partner can help you track deadlines, avoid costly mistakes, and make a plan that goes beyond just filing. That’s exactly what PaulHood is here for. 

Don’t Navigate Tax Deadlines Alone 

Feeling overwhelmed juggling deadlines? You’re not alone, and you don’t have to figure it out by yourself. At PaulHood, we know that keeping up with tax dates is just one piece of a much bigger picture. Our mission is to make tax planning straightforward for individuals and business owners alike, with personalized support that goes well beyond just filing forms once a year. Our team of experienced tax professionals offers year-round guidance tailored to your situation, so you always know where you stand and what’s coming next. To build a plan that keeps you ahead of the calendar, reach out today.