Sub-Chapter S Corporation tax returns (1120S) are due on March 15th. Are you done yet? If not, you might need to file for an extension. Here’s how:

First, make sure you really are a Sub-S Corp. I know that sounds silly, but every year (really, every year) I run into someone who thinks they have a Sub-S Corporation and doesn’t. It’s really important not to file paperwork for an entity that you’re not. If you’re an LLC that wants to be a Sub-S and you’re filing a “Whoopsie, I forgot to do the right paperwork clause,” you can’t file an extension, you’ve got to get your stuff in by March 15th.

But if you’re already a Sub-S corporation, then you can file for an extension if you need to. What you want is Form 7004. Here’s a link to it: http://www.irs.gov/pub/irs-pdf/f7004.pdf.

It’s easiest to just file it online and be done with it. But if you don’t have access to the software, you can paper file. Here’s the official list of mailing addresses: http://www.irs.gov/file/article/0,,id=177836,00.html . Basically, if you’re east of the Mississippi you’ll mail it to:

Department of the Treasury
Internal Revenue Service
Cincinnati, OH 45999-0045

If you’re west of the Mississippi it will go to:

Ogden, UT 84201-0045

For some reason Florida and Louisiana are listed with the “west of the Mississippi states.” Anyway, Florida and Louisiana get mailed to Ogden. Also, any Sub-S with income of over $10 million sends its extension to Ogden no matter where the business is located. (Any Sub-S with income of over $10 million should have an accountant that can file the extension for them and you shouldn’t be reading a how-to blog about it. Seriously.)

You’ll have to check with your state to determine if you are required to file a separate extension for your state. Here in Missouri, your federal extension will serve as your state extension – you’ll just attach a copy of your Federal 7004 to your Missouri 1120S when you file it. You only need to file a MO 7004 if you have a franchise tax liability.

Why should you care about filing an extension? Money! If you don’t owe any money on your tax return, the penalty for filing late is $195 for each month (or part of a month) that the return is late, multiplied by the number of shareholders. So let’s say you and a buddy have a Sub-S corporation and you forget about the March 15th deadline and file on April 15th instead. You’ll owe a $390 penalty on a tax return with no balance due. That stinks. Of course, if you totally blow things off and file in August, the penalty will be $1,560 – on a tax return with a zero balance due! See why it’s important to file that extension?

Sub S corporations generally don’t pay tax with their corporate form, but if you do owe money for some reason the penalties are even higher.

Even though extensions are fairly simple forms, you still might not want to do it yourself. This is one form that Roberg Tax Solutions can prepare for you over the phone for $25. You’ll need your business name, address, EIN number and a credit card and we can do it while you’re on the phone with us. It’s that easy. You have no reason not to get your extension in on time.