Will using a bank account with old business Tax ID cause issues after switching to a corporation?
So I have what might be a stupid tax question, but I'm worried about potential issues here. About 13 months ago, we converted our business from a sole proprietorship to a corporation. We opened a new bank account under the corporation's Tax ID number, and the sole proprietorship is technically not operating anymore. All of our business operations and tax filings will be done under the new corporation. Here's where it gets messy - we still have the old bank account open that uses the sole proprietorship's Tax ID number. We've kept it active because of an extremely complicated situation that's taking forever to resolve (over a year now and still ongoing). Because of this situation, we sometimes move money between the old sole prop account and the new corporation account. I'm concerned about potential tax issues. Will continuing to use this old bank account with the defunct sole prop's Tax ID cause major problems? What kind of repercussions might we face? Also, would it resolve the issue if I just updated the name and Tax ID on the old bank account to match our new corporation's information? I really want to stay compliant but this situation has been a headache to sort out.
27 comments


Yuki Yamamoto
This is actually a really good question. Using a bank account tied to a defunct business entity can definitely create some tax complications. When you operate as a corporation, you need to maintain clear separation between your business and personal finances - this extends to keeping your old sole prop and new corporation finances separate too. The IRS and state tax authorities look at these as completely different entities with different tax treatment. The commingling of funds between accounts could potentially lead to: 1) Confusion about which entity earned what income (and who should report it) 2) Questions about business continuity (making it look like the sole prop is still active) 3) Risk of "piercing the corporate veil" which could jeopardize your limited liability protection Regarding updating the information on the old account: Yes, this would be the cleaner approach. Contact your bank about updating the account ownership to your corporation's legal name and Tax ID. Most banks can do this, though they might require new paperwork. In the meantime, keep meticulous records of any transfers between accounts and their business purpose. Documentation will be your best defense if questions arise.
0 coins
Carmen Ruiz
•Would the OP be responsible for filing a tax return for the sole prop for 2023 even though it's technically inactive, since the bank account is still open and has transactions? I'm in a similar situation and just realized I might be messing up big time.
0 coins
Yuki Yamamoto
•If there was actual business activity using the sole proprietorship in 2023 (meaning income was earned or business expenses were paid through that entity), then yes, you would need to file a Schedule C for that business activity on your personal tax return. Just having the bank account open by itself doesn't trigger a filing requirement, but any business transactions flowing through it would be attributed to the sole prop. This is why it's important to either update the account ownership information or be very clear about documenting transfers between entities so you can properly allocate income and expenses to the right business for tax purposes.
0 coins
Andre Lefebvre
I dealt with something very similar when transitioning from my LLC to S-Corp. What saved me was using https://taxr.ai to analyze all my bank statements and categorize which transactions belonged to which entity. Their system analyzed ALL my transaction history and helped me create proper documentation showing which income/expenses belonged to the defunct entity vs the new corporation. Literally saved me from a potential audit nightmare because I had been playing fast and loose with those accounts for months.
0 coins
Zoe Dimitriou
•Did you need to provide them with both account statements? Like do they analyze everything together or just look at one account at a time?
0 coins
QuantumQuest
•How does this work with payroll though? Our situation is complex because of employees that were technically employed by the old company but now under the new one, but payroll was coming from both accounts during transition. Would that tool help with sorting that out?
0 coins
Andre Lefebvre
•Yes, I uploaded statements from both accounts. Their system actually works better when analyzing multiple accounts together because it helps identify transfers between accounts and patterns that might indicate business continuity or separation. For payroll situations, it absolutely helps with that. The system specifically flags employee payments and can help document which entity was the actual employer for which pay periods. It saved me when I had a similar situation where some employees were technically being paid from the wrong entity during our transition. The documentation it creates shows clear allocation of expenses which you can use to properly file your tax returns.
0 coins
QuantumQuest
Just wanted to update you all - I tried the taxr.ai service mentioned above and it was surprisingly good. I was skeptical at first but it allowed me to upload 18 months of statements from both accounts and gave me a complete breakdown of where money was moving between entities. The report it generated specifically highlighted all the transfers between accounts that could be problematic and gave me documentation I could provide to my accountant. We found about $42,000 in expenses that were incorrectly being attributed to the wrong entity! Ended up saving us a bunch in corporate taxes by getting everything properly categorized.
0 coins
Jamal Anderson
Same situation last year and our accountant said it was a mess. Tried calling the IRS to get guidance and spent HOURS on hold only to be disconnected. Finally used https://claimyr.com to get through to an IRS agent (you can see how it works here: https://youtu.be/_kiP6q8DX5c). They got me connected to a business tax specialist who confirmed that commingling funds between entities is a big red flag in case of audit. The agent provided specific guidance on how to document everything properly. Definitely worth it to get official answers rather than guessing.
0 coins
Mei Zhang
•Are these IRS agents actually helpful though? Every time I've talked to them they just read from scripts and don't answer my actual questions. Did they give you specific advice on your situation?
0 coins
Liam McGuire
•Wait, you pay someone to wait on hold FOR you? That sounds like a scam. Why would the IRS talk to someone else on your behalf? How does this actually work?
0 coins
Jamal Anderson
•The key is getting to the right department. I asked specifically for a business tax specialist who handles entity transitions. The first agent wasn't helpful, but they transferred me to someone who dealt with these issues regularly. They gave me specific documentation requirements and explained exactly what they look for during audits when businesses change entities. No, they don't talk to someone else on your behalf. The service just handles the hold time. They call the IRS, navigate the phone tree, wait on hold (which took 2.5 hours in my case), and then when an agent actually picks up, your phone rings and you're connected directly to the IRS agent. You do the actual talking - they just handle the ridiculous wait time. Your phone rings when a human actually answers.
0 coins
Liam McGuire
I was completely wrong about this service. Just tried Claimyr after posting my skeptical comment. My accountant had been telling me to call the IRS about this exact situation for MONTHS but I kept putting it off because of the hold times. Used the service today and got through to an agent in about 90 minutes (while I continued working). The agent explained that keeping the accounts separate isn't enough - I needed to file a specific form showing the transfer of assets from the sole prop to the corporation. Without this form, they could potentially disallow expense deductions or worse, disregard the corporate entity entirely. This would have been a HUGE problem come tax time.
0 coins
Amara Eze
One thing nobody's mentioned - if you're still using that old sole prop account, you may still be liable for sole proprietorship self-employment taxes on any income flowing through it, even if it's really corporate income. This happened to my brother last year and he got hit with an extra $8,700 in SE tax he shouldn't have had to pay. Make sure you talk to a CPA about this.
0 coins
Ethan Brown
•That's really concerning - I hadn't even considered the self-employment tax angle. Did your brother have to pay that permanently or was he able to fix it somehow? We're talking potentially thousands in our case if that's true.
0 coins
Amara Eze
•He eventually got it sorted out but it took filing an amended return and providing extensive documentation showing that the income was actually earned by the corporation, not the sole prop. He had to prove the corporate entity was legitimate and operational during that period. His accountant said that if you're going to leave both accounts open, you need a formal written agreement between your sole prop and corporation explaining any transfers between accounts (like a loan agreement or service contract). Otherwise the IRS might see it as you operating both businesses simultaneously or disregard the corporate structure entirely.
0 coins
Giovanni Ricci
Be careful with this situation! The bank could potentially force-close your sole prop account when they realize the business no longer exists. Had this happen with Chase - they audited business accounts and closed mine with only 30 days notice when they saw the entity was dissolved. Made a huge mess with recurring payments and clients who had that account on file.
0 coins
NeonNomad
•Happened to me too with Bank of America! Totally screwed up all my automatic payments and a client sent a $9k payment to the closed account that took months to recover. OP should definitely be proactive about this.
0 coins
Giovanni Ricci
•The worst part was BOA wouldn't accept my instructions about where to send the remaining balance. They just mailed a check to the business address on file, which had changed, so the check got returned and then sat in limbo for weeks. Complete disaster.
0 coins
Fatima Al-Hashemi
Has anyone considered the state tax implications? Each state handles entity transitions differently. In California, for example, using an old sole prop bank account for your corp can trigger a "successor liability" issue where your corp could be responsible for any unpaid taxes from the sole prop. On the flip side, in some states incorrectly attributing income to a corporation when it should be on the sole prop could trigger minimum corporate tax requirements you otherwise might have avoided.
0 coins
Dmitry Kuznetsov
This is a really complex situation that touches on several areas - entity separation, tax compliance, and banking regulations. From what I've seen in similar cases, the key is to act quickly to clean this up before it becomes a bigger problem. First, I'd strongly recommend getting that bank account ownership updated to your corporation ASAP. Most banks will let you do this with the right paperwork (corporate resolution, new signature cards, etc.). This eliminates the appearance that your sole prop is still operating. Second, you need to be very careful about how you're documenting any transfers between accounts. The IRS will want to see clear business purposes for any money movement between entities. If it looks like you're just using them interchangeably, that could jeopardize your corporate status. One thing I haven't seen mentioned yet - make sure you're not accidentally triggering any state franchise tax or minimum tax requirements by keeping the sole prop "active" through bank activity. Some states consider any business banking activity as evidence the entity is still operating, which could create ongoing tax obligations you don't need. I'd also suggest talking to a CPA who specializes in entity transitions. They can help you figure out if you need to file any forms with the IRS to properly document the transfer of assets from your sole prop to the corporation. Getting this documented properly now could save you major headaches if you ever get audited.
0 coins
StarStrider
•This is really comprehensive advice! I'm curious about the state franchise tax issue you mentioned - how would someone know if their state considers banking activity as evidence the entity is still operating? Is there a resource to check state-specific rules on this, or do you just have to call each state's tax department individually? I'm dealing with a multi-state situation and want to make sure I'm not creating problems in states where I might not even realize there are ongoing obligations.
0 coins
Donna Cline
•Most state tax departments have this information buried in their business tax guides or entity dissolution procedures, but it's not always easy to find. I'd recommend starting with each state's Secretary of State website - they usually have guidance on what constitutes "doing business" in their state. For franchise taxes specifically, check the state's revenue department website. A few states I know off the top of my head: California considers any bank account activity as evidence of doing business, Texas looks at actual business transactions (not just account maintenance), and Delaware is pretty lenient about dormant accounts. But these rules change, so definitely verify current requirements. If you're dealing with multiple states, it might be worth hiring a multi-state tax specialist for a consultation. The cost of getting it wrong (ongoing minimum taxes, penalties, etc.) usually far exceeds the cost of getting professional advice upfront. Some states have minimum franchise taxes of $800+ per year that you'd be paying unnecessarily if they consider your sole prop still active.
0 coins
Chloe Zhang
•Great question! Each state has different rules, but here are a few ways to check: 1) Most state tax departments have business entity search tools on their websites where you can look up your old sole prop and see if it shows as "active" or "inactive" 2) Check your state's Secretary of State business database - some states automatically mark sole props as inactive after a certain period of no filings, while others require you to formally dissolve them 3) For franchise taxes specifically, look at your state's tax department website under "business taxes" - they usually have charts showing what triggers minimum tax requirements 4) If you're in multiple states, the Federation of Tax Administrators website (taxadmin.org) has links to all state tax departments which can save you time For multi-state situations, I'd definitely recommend calling each state's business tax division. Most have dedicated lines for entity status questions and can tell you quickly if there are any outstanding obligations. It's worth the phone calls because some states (looking at you, California and New York) are particularly aggressive about going after businesses they think are still operating without proper filings. The key thing is that banking activity alone usually isn't enough to keep an entity "active" for tax purposes, but combined with other factors (like receiving business income) it definitely can be.
0 coins
Sienna Gomez
•Most states have this information buried in their business tax code or franchise tax regulations, but it's not always easy to find. Your best bet is to check each state's Secretary of State website and look for their business entity dissolution/inactive status requirements. For example, Delaware considers any business activity (including banking transactions) as evidence of continued operation, while Nevada is more lenient and looks at whether you're actually conducting business operations. Texas falls somewhere in between - they care more about revenue generation than just account activity. A quicker approach might be to call the business tax departments in each state where you were registered and ask specifically: "If I have a dissolved sole proprietorship but the bank account is still open with occasional transactions, does that trigger any ongoing tax filing requirements?" Most state tax departments can give you a straight answer on this over the phone, and it's better to ask now than get surprised with back taxes later. You could also check with your CPA - they usually know the rules for states they regularly deal with, and can research the others if needed.
0 coins
Aidan Hudson
•Great question about multi-state issues! Each state definitely handles this differently. Most states have their Secretary of State and Department of Revenue websites where you can find entity status requirements, but honestly the rules can be buried in regulations that aren't always clear. For a quick check, I'd start by looking up "[state name] dissolved entity banking activity" or "[state name] inactive business franchise tax" on each state's tax department website. Some states like Delaware and Nevada are pretty explicit about when banking activity keeps an entity "active" for tax purposes. If you can't find clear guidance online, calling the state tax departments is probably your best bet, but be prepared for potentially conflicting answers depending on who you talk to. You might also want to check with a multi-state tax specialist - they usually have experience with these nuances across different jurisdictions and can spot potential issues you might miss. The tricky part is that some states have "gotcha" rules where even minimal activity can trigger ongoing obligations, while others only care about actual business operations. Better to know now than get surprised later with back taxes and penalties!
0 coins
CyberSiren
•Great question! Most states publish their entity dissolution and inactive status rules on their Secretary of State or Department of Revenue websites. For franchise taxes specifically, I'd check each state's tax department website - they usually have FAQs about what constitutes "doing business" in their state. A few states I know off the top of my head: California considers any bank account activity as potential evidence of doing business, Texas looks at revenue generation regardless of the account used, and Delaware focuses more on whether you're actually conducting operations. But these rules change, so definitely verify current requirements. For multi-state situations, you might want to consider hiring a service that specializes in multi-state compliance - they can do the research across all your states and give you a comprehensive report. It's usually cheaper than dealing with unexpected tax bills later. The National Association of Secretaries of State website also has links to all state business filing offices if you want to research directly.
0 coins