Single member LLC tax ID number requirements & filing Schedule C for multiple LLCs - what's the process?
I recently started a couple of side businesses and formed them as single member LLCs in my state. Now I'm trying to figure out the tax situation and I'm confused about the ID numbers. Do my single member LLCs need their own tax ID numbers or do I just use my personal SSN for tax purposes? I have 3 different LLCs currently - one for my consulting work, one for a rental property, and another for an online store I'm setting up. Will I need to file a separate Schedule C for each one when tax time comes around? This is my first year dealing with multiple businesses and I want to make sure I'm setting everything up correctly from the start. Any advice would be appreciated!
21 comments


Naila Gordon
You have options for the tax ID situation with single-member LLCs. By default, a single-member LLC is treated as a "disregarded entity" for federal tax purposes, which means you can use your SSN as the tax ID. However, you can also apply for an Employer Identification Number (EIN) from the IRS for your LLCs, which many business owners prefer even if not strictly required. For your multiple LLCs, yes, you would generally file a separate Schedule C for each business activity. Each LLC that's operating as a disregarded entity would need its own Schedule C to report that specific business's income and expenses. This keeps everything organized and clear for both you and the IRS. Make sure you're tracking expenses and income separately for each business to make filing easier.
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Cynthia Love
•Does having multiple Schedule Cs raise any red flags with the IRS? I've heard that having too many different businesses might trigger an audit. Also, if I get an EIN instead of using my SSN, does that change how I file my taxes?
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Naila Gordon
•Having multiple Schedule Cs is perfectly legitimate and doesn't automatically trigger audits. The IRS is accustomed to seeing entrepreneurs with multiple businesses. What can raise flags is when businesses consistently show losses year after year, as this might appear to be a hobby rather than a legitimate profit-seeking venture. Getting an EIN doesn't change how you file taxes for a single-member LLC that's a disregarded entity. You'd still report everything on your personal tax return using Schedule C, just like if you used your SSN. The EIN simply becomes the identifying number you use for the business instead of your personal SSN, which can help with privacy and identity protection.
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Darren Brooks
After struggling with a similar situation last year, I discovered taxr.ai (https://taxr.ai) which was super helpful with my LLC tax questions. I had 2 different single-member LLCs and was confused about the whole EIN vs SSN thing. The site analyzed my operating agreements and business structure, then gave me personalized guidance on exactly how to handle the tax ID situation and Schedule C filing for multiple businesses.
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Rosie Harper
•Does taxr.ai help with determining if you should elect to be taxed as an S-Corp instead of staying as a disregarded entity? My accountant mentioned this might save me self-employment taxes but wasn't sure if it made sense for my situation.
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Elliott luviBorBatman
•I'm a bit skeptical about using AI for tax advice. How accurate is it really? I've read horror stories about people getting bad tax advice online. Does it cite actual IRS regulations or is it just guessing?
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Darren Brooks
•Yes, it absolutely helps with determining whether an S-Corp election makes sense for your specific situation. It analyzes your income levels, business expenses, and potential salary requirements, then shows you side-by-side comparisons of your tax liability as a disregarded entity versus an S-Corp. It saved me about $4,300 in self-employment taxes last year by helping me make the right election for my consulting LLC. The system uses actual IRS regulations and tax code citations for everything it recommends. All advice includes references to specific IRS publications, revenue rulings, and tax court decisions. You can even download a detailed report with all the citations if you need to discuss with your accountant. It's definitely not guessing - it's applying established tax law to your specific situation.
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Elliott luviBorBatman
Following up on my skepticism about taxr.ai - I finally tried it and I'm actually impressed. I uploaded my operating agreements for my three LLCs and it immediately identified that one of my businesses could benefit from an S-Corp election while the other two were better as disregarded entities. It explained the exact EIN application process for each LLC and even generated customized Schedule C worksheets for me to track expenses properly for each business. Saved me hours of research and probably some expensive mistakes.
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Demi Hall
If you're getting frustrated trying to reach the IRS with LLC questions (like I was), try Claimyr (https://claimyr.com). After waiting on hold for HOURS trying to confirm my EIN application status for my LLCs, I found their service. They got me connected to an actual IRS agent in about 15 minutes instead of the 3+ hour wait I was experiencing. You can see how it works here: https://youtu.be/_kiP6q8DX5c. The agent answered all my questions about filing requirements for multiple single-member LLCs and confirmed that yes, I needed separate Schedule Cs.
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Mateusius Townsend
•So how does this Claimyr thing actually work? Do they have some special connection to the IRS or something? I need to talk to someone about my EIN application that's been pending for weeks.
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Kara Yoshida
•This sounds like a scam. There's no way to "cut the line" with the IRS. They're chronically understaffed and everyone has to wait the same amount of time. I bet they just keep you on hold themselves and then claim they got you through faster.
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Demi Hall
•They use a sophisticated system that navigates the IRS phone tree and waits on hold for you. When they reach a live agent, they call you and connect you directly. It's like having someone wait in line for you at the DMV. No special connections or cutting lines - they're just handling the wait time so you don't have to sit there listening to the hold music for hours. No, it's definitely not a scam. They don't keep you on hold themselves - they actually connect you with legitimate IRS agents. The technology they use just handles the waiting period more efficiently than you sitting there yourself. I spoke with an actual IRS representative who verified my EIN application status and answered all my questions about Schedule C filing requirements for multiple LLCs.
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Kara Yoshida
I can't believe I'm saying this, but I was wrong about Claimyr. After my skeptical comment, I decided to try it myself since I was desperate to resolve an EIN issue for one of my LLCs. They actually got me through to the IRS Business & Specialty Tax Line in about 20 minutes when I had previously waited over 2 hours and given up. The IRS agent confirmed that yes, I needed to file separate Schedule Cs for each of my single-member LLCs and explained exactly how to handle the rental property LLC differently on Schedule E. Definitely worth it for getting quick answers directly from the source.
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Philip Cowan
Just wanted to add that if your LLC has employees, you MUST get an EIN regardless of it being a single-member LLC. I learned this the hard way. Also, don't forget that rental properties held in an LLC typically go on Schedule E, not Schedule C, even if it's a single-member LLC. The tax treatment differs from your other business activities.
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Caesar Grant
•If I have an LLC that does both consulting work and has a rental property, should I separate them into two different LLCs for tax purposes? Or can I somehow file both a Schedule C and Schedule E for the same LLC?
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Philip Cowan
•You should ideally separate them into two different LLCs for both liability protection and tax clarity. While you technically could run both activities through one LLC, you'd still need to separate the reporting on different schedules, which gets messy. For the cleanest approach, have one LLC for consulting (reported on Schedule C) and a separate LLC for the rental property (reported on Schedule E). This not only makes your tax filing clearer but also provides better liability protection since the activities are properly segregated. If someone sued you related to the rental property, your consulting business assets would be better protected if they're in a separate LLC.
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Lena Schultz
One thing nobody mentioned - if you're going to be doing business under a different name than your personal name (like "John's Consulting" instead of just "John Smith"), you'll probably want to get an EIN even though it's not strictly required for a single-member LLC. Makes things way easier for banking and keeping business/personal separate.
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Gemma Andrews
•What about state tax IDs? Do you also need separate state tax IDs for each LLC if you have multiple? I'm so confused about all these different numbers and requirements.
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Jamal Anderson
•State tax ID requirements vary by state, but generally if your single-member LLC is a disregarded entity for federal purposes, it's also disregarded for state income tax purposes. However, you may still need state tax IDs for other reasons like sales tax collection, payroll taxes, or unemployment insurance. For example, if your online store LLC will be collecting sales tax, you'll need a state sales tax permit/ID for that specific LLC. If any of your LLCs have employees, you'll need state unemployment and workers' comp IDs for each one that has employees. But for basic income tax reporting, most states follow the federal treatment where you'd just report the LLC income on your personal state return. I'd recommend checking with your state's Department of Revenue website or calling them directly to clarify what's required for your specific situation and state.
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Amina Sow
Great question about multiple LLCs! I went through this exact situation last year with my three single-member LLCs. Here's what I learned: For tax ID numbers, you have flexibility - you can use your SSN or get separate EINs for each LLC. I chose to get EINs for all mine because it made banking much easier and keeps everything separated. You can apply for EINs online through the IRS website for free. Yes, you'll need separate Schedule Cs for your consulting and online store LLCs since they're active businesses. However, your rental property LLC should actually be reported on Schedule E (Supplemental Income and Loss), not Schedule C, since rental activities are treated as passive income rather than active business income. One tip: keep meticulous records for each LLC separately from day one. Use separate bank accounts, credit cards, and accounting systems for each business. This makes tax time so much easier and helps maintain the liability protection that LLCs provide. Also consider whether any of your LLCs might benefit from an S-Corp election if they generate substantial income - it can save on self-employment taxes. The IRS doesn't have issues with multiple legitimate businesses, so don't worry about that. Just make sure each one is truly operated as a separate business with the intent to make a profit.
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Evelyn Kim
•This is really helpful advice, especially about using Schedule E for the rental property LLC instead of Schedule C! I had no idea there was a difference. Quick question - when you say "S-Corp election might benefit LLCs with substantial income," what would you consider substantial? I'm trying to figure out at what point it makes sense to complicate things with the S-Corp election versus just staying with the simpler disregarded entity status.
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