5 Common Accounting Mistakes Small Businesses Make (And How to Avoid Them) 

As a small business owner, accounting is one of the most critical aspects of your operation. Accounting can be challenging, especially if you need more formal training or experience. Common accounting mistakes can cause significant problems for small businesses, including cash flow problems, missed tax deadlines, and regulatory issues.  

To help you avoid these pitfalls, we’ve compiled a list of five common accounting mistakes small businesses make and how to avoid them. 

1. Mixing Personal and Business Finances 

One of small business owners’ most significant accounting mistakes is mixing personal and business finances, also known as co-mingling. When funds are co-mingled, it becomes difficult to distinguish between personal and business transactions, which can create legal and financial problems. If a business owner co-mingles funds and the business is sued or faces financial difficulties, their personal assets may be at risk. This means that personal liability for business debts and legal obligations can extend beyond the business entity and affect the owner’s personal finances. Mixing finances can lead to incorrect financial statements and missed deductions and can cause significant problems during an audit.  

It is important to keep personal and business finances separate to minimize the risk of personal liability. To prevent this, establish a separate bank account and credit card solely for your business. Make sure you only use these accounts for business expenses. 

2. Not Tracking Expenses 

Another common accounting mistake small business owners make is not tracking expenses. Tracking expenses can help you identify unnecessary spending, make informed financial decisions, and help you file accurate tax returns. Business owners can be more informed and precise by regularly monitoring expenses using either accounting software or a spreadsheet.  

A good practice is to remember to retain receipts and invoices for all transactions. Retaining receipts and invoices for all transactions is an essential part of managing personal and business finances. It is important to keep these documents as proof of payment and to provide evidence for tax and accounting purposes. It is recommended to retain receipts and invoices for at least three to seven years, depending on the type of transaction and the requirements of tax authorities. Some receipts and invoices may need to be kept permanently, such as those related to property purchases or legal settlements.  

To make record-keeping easier, it is a good idea to scan or photograph receipts and invoices and store them electronically in a secure location, such as the cloud or an external hard drive. By keeping track of receipts and invoices, individuals and businesses can stay organized and prepared in case of audits or other financial inquiries. 

3. Failing to Reconcile Accounts 

Reconciling your accounts is vital for ensuring that your financial records match your bank statements. To accomplish this, you should regularly compare your organization’s financial records, such as bank statements and accounting ledgers, to ensure they are consistent and accurate. This process involves identifying discrepancies between the records and resolving them to ensure that your financial statements are up-to-date and precise. Reconciling is essential because it helps to identify errors and inconsistencies that could lead to financial misstatements or fraud. It also helps to ensure that your financial statements comply with accounting standards and regulatory requirements.  

By regularly reconciling your financial records, you can maintain the integrity of your financial information and make informed financial decisions. Failing to reconcile your accounts can lead to errors in your financial statements and cash flow problems, so it is essential to reconcile your accounts at least once a month. 

4. Not Planning for Taxes 

Taxes are a significant expense for small businesses, and failing to plan for them can lead to unexpected costs and penalties. To avoid this mistake, you should plan for your tax obligations throughout the year. Start by understanding your tax obligations, including what taxes you need to pay, when you need to pay them, and how much you will owe. You should also be aware of any deductions or credits that may be available to you, which can help to reduce your tax burden.  

To ensure that you are prepared to meet your tax obligations and avoid any costly surprises, keep accurate records and stay up-to-date on tax laws and regulations. Keep track of all expenses and deductions, and consider using accounting software or a tax professional to prepare and file your tax returns. By planning ahead and staying organized, you can minimize the impact of taxes on your small business. 

5. Not Seeking Professional Help 

Last but certainly not least, a huge mistake small business owners often make is not seeking professional help when needed. Accounting can be complex, and mistakes can have serious consequences. Having the knowledge and guidance of a professional can ensure you stay compliant with tax regulations and avoid costly mistakes. Consider getting someone like an accountant or bookkeeper to assist you with managing your finances, planning for tax season, reconciling your books, and keeping personal and business accounts separate.  


Accounting mistakes can have significant consequences for small businesses. By avoiding these common mistakes, you can ensure your finances are accurate and up-to-date. Set up separate accounts, track expenses regularly, reconcile accounts, plan for taxes, and seek professional help. Following these tips can avoid common accounting mistakes and keep your small business on track. 

Don’t let these common mistakes derail your success. Primus Business Management can provide the professional help you need to manage your finances. Our team of experienced accountants and bookkeepers can help you avoid costly mistakes and keep your business on track for long-term success. 

Contact Primus Business Management today to see how we can help you achieve financial stability and success.