Commingling: The Dangers of Mixing Business and Personal Expenses (2025)

Commingling: The Dangers of Mixing Business and Personal Expenses (1)

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Commingling sounds like fun, but it can be pretty messy. When you’re mixing business and personal expenses, you’re putting yourself at risk, both financially and legally. Additionally, commingling can lead to serious tax problems. To ensure you don’t end up on the IRS naughty list, make sure you understand how to keep expenses separated and your tax filings compliant.

Business Expense vs. Personal Expense

According toIRS Publication 535, a business expense must be “both ordinary and necessary” to be deductible. An “ordinary” expense is one that is common and accepted in your industry. A “necessary” expense is one that is helpful and appropriate for your trade or business. Although it doesn’t have to be indispensable to be considered necessary.

Generally, you cannot deduct personal, living, or family expenses on your tax return. But what if you have an expense that is partly business and partly personal? You’ll need to determine which portion of the expense is used for each and deduct accordingly.

For example, if you run a cooking YouTube channel and purchase new cutlery that is used equally for business and personal use, you can deduct 50% of the cost as a business expense.

The Risks of Commingling Funds

When mixing business with personal expenses, your finances can quickly become a mess. Sometimes it seems innocent, like extending a business trip for a week to include a vacation, but commingling your expenses can have serious consequences, such as:

  • Increased Legal Risk: If you’re an LLC and mix your business and personal expenses, you could compromise your liability protection. This could put your personal assets at risk if your business is audited or sued.
  • Tax Audits: Claiming personal expenses as business expenses can also trigger red flags with the IRS. If audited, you could face penalties, interest fees, and even legal actions. Additionally, you’re likely to face a larger tax bill.
  • Inaccurate Financial Reports: Mixing your financials can lead to inaccurate reporting. This not only misrepresents your company’s financial health but can also damage its reputation and creditworthiness.

Tips For Keeping Your Business And Personal Expenses Separate

There are several things you can do to avoid commingling your business and personal expenses.

  1. Keep separate bank accounts and credit cards: The easiest way to keep your finances separate is to set up different accounts and cards for your business. Only use these funds when making business purchases or paying business expenses.
  2. Use accounting software: Accounting solutions, such as FreshBooks, provide an easy way to track and identify your expenses if you run a small business.
  3. Hire an accountant: For larger businesses, hiring an accountant may make more sense. They will not only help with the day-to-day financials but can also assist during tax time.
  4. Digitally organize receipts and invoices: Forget about storing your paper receipts in folders or boxes. This antiquated method is too messy and doesn’t protect receipts from fading over time. Instead, invest in a receipt scanner and digitally store them on your computer. You can also use an app, such as WellyBox, to generate expense reports or forward the information to your accounting software.
  5. Track business use of personal items: If you purchase an item that is being used for both personal and business use, be sure to keep a log. You’ll want to track the exact date and time of business use to determine the percentage you can deduct at tax time. If the IRS questions your deduction, you’ll have documentation to support your claim.
  6. Review your business accounts regularly: Conduct regular audits (at least twice a year if not more) of your business accounts to identify any possible commingling issues. Correcting these issues early can save you from a major headache later on.

Final Thoughts

Although it’s not uncommon for small business owners to use their personal credit cards and bank accounts to pay business expenses, we strongly advise against it. The risks associated with commingling far outweigh the convenience of using one account. It can also be an expensive mistake if the IRS determines you overstated your business deductions. If you need help separating your personal and business expenses at tax time, consider working with a CPA or tax professional. They’ll help you get organized and keep your business compliant.

Commingling: The Dangers of Mixing Business and Personal Expenses (2025)

FAQs

Commingling: The Dangers of Mixing Business and Personal Expenses? ›

“Commingling funds between personal and business accounts pierces the corporate veil, allowing creditors to come after you personally for business or corporate debts and liabilities. It is the first strategy an adversary will take when attempting to collect upon a debt or liability of your business.

What happens if you mix personal and business expenses? ›

In addition to missing out on deductions, combining personal and business finances will make filing every tax return much more complicated. If they remain apart, preparing financial documents for your tax professional will be a much easier process come tax season.

What is commingling of business and personal funds? ›

Commingling of funds can happen in various ways: Using a business credit card for personal purchases. Depositing business income into a personal bank account. Paying personal bills from a business checking account.

What is it called when you mix business and personal money? ›

Commingling is mixing your personal funds with your business funds, or using business assets for personal reasons. Although it is more common in small businesses such as LLCs, commingling is a common challenge for any small business owner.

What is commingling of expenses? ›

The practice of commingling brings trouble with creditors and even the IRS and California tax agencies. What is commingling? Commingling is simply using personal funds for business purposes, and/or using business money for personal needs.

How to avoid commingling funds LLC? ›

The best way to avoid commingling funds is to record transactions as soon as possible – before you forget who the money came from and what it was for.

What does the IRS say about commingling funds? ›

The Risks of Commingling Funds

This could put your personal assets at risk if your business is audited or sued. Tax Audits: Claiming personal expenses as business expenses can also trigger red flags with the IRS. If audited, you could face penalties, interest fees, and even legal actions.

What is the risk of commingling? ›

Understanding the Legal Risks of Commingling Funds

Commingling funds—mixing personal and business finances—can jeopardize the corporate liability shield. This “shield” is a layer of legal protection that separates your personal assets from your business debts and liabilities.

Why is commingling bad? ›

Possibility of legal problems

If your business is structured as an LLC or a corporation, and you have commingled funds, you could lose liability protection. Creditors may be able to make a claim against your personal assets. They could argue that your LLC or corporation isn't a separate legal entity.

What are the disadvantages of commingling? ›

Disadvantage. A disadvantage of commingled funds is that they do not have ticker symbols and are not publicly traded. This lack of public information can make it difficult for outside investors to track the fund's capital gains, dividends, and interest income.

Is commingling funds illegal? ›

In some cases, the commingling of funds may be illegal. This usually occurs when an investment manager combines client money with their own or their firm's, in violation of a contract. Details of an asset management agreement are typically outlined in an investment management contract.

Is it illegal to pay personal expenses from a business account LLC? ›

To put it simply, when you mix your business and personal finances, you're essentially treating your business as a personal piggy bank. 🐷 And while it's not technically against the law to make a personal purchase from your business account, it can lead to major issues with taxes, bookkeeping, and compliance.

How do you avoid mixing business and personal finances? ›

Let's look at some easy ways to do it.
  1. Put your business on the map. ...
  2. Open a business checking account and get a business debit card. ...
  3. Get a business credit card. ...
  4. Pay yourself a salary. ...
  5. Separate your receipts and keep them. ...
  6. Track shared expenses. ...
  7. Keep track of when you use personal items for business purposes.

What are the consequences of commingling? ›

An attorney who engages in the commingling of funds, which is prohibited by the professional conduct rules of various state bars, would likely encounter state bar discipline as a consequence of this ethical breach. In less severe instances, the attorney may receive a public or private reprimand from the state bar.

What is an example of commingling? ›

Example: If an agent deposits client funds into their personal bank account or combines it with the brokerage's operating funds, it is considered commingling. Legal Consequences: Commingling is generally prohibited because it can lead to confusion about the ownership of funds and creates the risk of misappropriation.

What is considered commingling funds? ›

Commingling refers broadly to the mixing of funds belonging to one party with funds belonging to another party. It most often describes a fiduciary's improper mixing of their personal funds with funds belonging to a client.

Is it illegal to write off personal expenses as business expenses? ›

You wouldn't write off these expenses as business expenses because they're not ordinary and necessary costs of carrying on your trade or business. Personal, living, or family expenses are generally not deductible. It's a good idea to keep separate business and personal accounts as this makes it easier to keep records.

Can you offset personal income with business expenses? ›

Yes, your business loss from your S-Corporation will offset your earned income reported on your W-2.

Can I write off business expenses paid with personal funds? ›

Yes, you can use personal money to pay for business expenses (just not the other way around.) In fact, most businesses start up this way with the owners putting their personal money into the business to get things started. In the end, the accounts track it all when they balance the books.

Is it illegal to use business funds for personal use? ›

Using a corporate account to pay for personal expenses and claim those costs as business expenses would be illegal. If IRS becomes aware of your actions, you may have to pay late payment penalties of 5% to 15% of unpaid taxes and late filing penalties of 5% of unpaid taxes.

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