What Are Business Audits? How Can You Prepare for Them?

By Susan Guillory · May 30, 2024 · 14 minute read

We’re here to help! First and foremost, SoFi Learn strives to be a beneficial resource to you as you navigate your financial journey. Read more We develop content that covers a variety of financial topics. Sometimes, that content may include information about products, features, or services that SoFi does not provide. We aim to break down complicated concepts, loop you in on the latest trends, and keep you up-to-date on the stuff you can use to help get your money right. Read less

What Are Business Audits? How Can You Prepare for Them?

A business audit can involve having the IRS comb through your books looking for tax discrepancies. While that may not be a small business owner’s idea of a great time, audits aren’t necessarily a bad thing, and you can take steps to prepare for one. In fact, an IRS audit is only one type of audit you may face and want to be prepared for.

Many small businesses actually find it beneficial to conduct their own audits (known as internal audits) once a year to ensure the accuracy of their books.

An external audit, which is done by an independent third party, can help you qualify for certain programs and certifications. It can also help you attract investors and apply for small business funding.

Read on to learn what a small business audit is all about, plus how to avoid the kind you’d probably rather not have to deal with — one by the IRS.

What Is a Small Business Audit?

A small business audit is a review of your business’s accounts, including your small business accounting systems, financial documents, invoices, and tax returns, to make sure they are an accurate view of your company and comply with applicable laws.

A company can elect to do a self-audit to make sure everything is correct, and also ensure that they are maintaining operational efficiency. The IRS might also do an audit of your company.

You might be subject to an external audit when applying for certain business certifications, bid on a contract, a business insurance policy, or if you decide to sell your company.

How Small Business Audits Work

Because the purpose of an IRS small business audit is to ensure the accuracy of financial records, an auditor will do a thorough evaluation of your accounting books and financial statements.

To do this, the auditor will likely request a physical copy of your books or log-in access to your accounting software. Typically an auditor will check a year’s worth of financial data and will review income and expenses to make sure everything lines up as it should.

For example, starting a small business often requires a large financial outlay, but if one of those expenses was to put in a pool at your home, that may trigger some questions in the audit.

It can be helpful if your financial records (whether physical or electronic) are organized by year and category of income or expenses. This can help ensure that an audit doesn’t take more time than necessary.

In the case of an IRS audit, the audit may happen in person or through the mail. Typically, the IRS will send you a letter requesting the information they need about certain items on your tax return, such as income, expenses, and deductions. If you have too many books to mail, you can request an in-person audit.

3 Types of Small Business Audits

There are three main types of small business tax audits you may want to become familiar with.

Internal Audits

This is conducted internally, meaning you elect to conduct an audit, maybe to ensure your financial statements and books are accurate. A small business might hire an outside auditor, while a larger company might use its in-house accountants.

Handling the audit with your team can be much more cost-effective, however you may lose a level of objectivity a third party would bring to the process.

Typically, internal auditors don’t only check a business’s finances. They may also look into company policies, procedures, and processes to make sure they are as efficient as they can be and comply with federal, state, and local laws.

An internal audit is for your own purposes; you don’t submit the results to an external organization.

Process of Internal Audits

An internal auditor may identify a specific department to audit, and will then conduct an evaluation to fully understand the current internal control process being used by that department. Typically, they do this by observing, taking notes, reviewing documents, and interviewing employees. The internal auditor will then follow up with department staff to go over strengths and weaknesses they’ve identified, then prepare an official audit report and review it with company management.

How Often Should Internal Audits Take Place?

An internal audit can be done on a daily, weekly, monthly, or annual basis, depending on the circumstance and needs of the business. Some departments may be audited more often than others. Generally, internal audits should be conducted often enough to pick up problems and to prevent compliance issues. They can be scheduled ahead of time to give employees time to prepare or by surprise (if any unethical activity is suspected).

Why Are Internal Audits Performed?

Internal audits are performed to evaluate the effectiveness of a company’s internal controls, corporate governance, and accounting processes. An internal audit helps owners and managers ensure that the business is complying with laws and regulations and can uncover areas of waste or inefficiency. An internal audit may also be done before a required external audit to find any potential issues and correct them in advance.

External Audits

With an external audit, an independent (or third-party) auditor will typically be hired to review your financial records and provide an audit report. If there is any evidence that your financial records don’t accurately represent your financial position — for example, you claim more profit than you actually had — the auditor is required to report the discrepancy.

The external auditor will typically provide you with an audit report that abides by generally accepted accounting principles (GAAP). They will likely also provide an opinion as to whether your company passed the audit.

Process of External Audits

During an external audit, an independent auditor will thoroughly review your company’s financial and accounting records. They will be checking the accuracy and completeness of these records, and whether or not they have been prepared in accordance with generally accepted principles. They will also likely compare your business to others in the same industry to identify anything that could be a sign of incorrect financial reporting.

At the end of the audit, the auditor will prepare and deliver an auditor’s report to your business that includes all of their findings and states their objective opinion.

How Often Should External Audits Take Place?

Typically, a company would not have more than one external audit per year. Publicly held companies are legally obligated to have annual external audits. Some nonprofit companies are also often legally obligated to perform annual external audits due to federal and state regulations.

Why Are External Audits Performed?

External audits are typically performed when a third party wants to validate a company’s financial statements and provide assurance of the accuracy of financial reports. While external audits aren’t generally required for small businesses, some owners will elect to conduct an external audit voluntarily in order to have a verified auditor’s report, and/or to help build public confidence in their company. In some cases, an external audit may be required for a small business to bid on a contract or apply for a small business loan, grant or special certification.

IRS Audits

An IRS audit is a review of an organization’s accounts and financial information to make sure information was reported correctly according to the tax laws and to verify the reported amount of tax is correct.

Getting audited by the IRS doesn’t necessarily mean there’s a problem. The agency uses different methods to generate audits. Typically, they are triggered by a computer using a statistical formula: Randomly selected returns are compared against “norms” for similar returns.

Another reason your return might also be selected for an audit is it involves issues or transactions with other taxpayers, such as business partners or investors, whose returns were selected for audit, according to the IRS.

If the IRS finds any potential errors in your return, it will usually be for a return filed in the last three years, but it could go back further if the IRS finds a substantial error. They typically don’t go back more than six years.

IRS Correspondence Audits

Correspondence (or mail) audits are the most common type of IRS audit. With this type of audit, the IRS identifies possible errors in your tax return and sends you a letter describing each error in detail. These issues can be corrected or explained away by sending the IRS additional documentation.

IRS Field Audits

With this type of audit, an IRS auditor will visit your place of business in person. During these interviews, the IRS agent will review financial statements, past tax returns, and other relevant documents in order to legitimize the suspect items on your audited tax return. They may also make assessments based on observations about your place of business and the processes occurring there.

Recommended: Micro loans for women-owned businesses

Internal vs External Audits: Similarities and Differences

Here’s a look at how internal and external audits compare.

Internal Audits

External Audits

Usually involuntary X
Done by external auditor X
Scheduled by management X
Provides assurance
Provides auditor’s report
Identifies issues in financial process
Reported to third parties X

How to Avoid Getting Audited: 7 Top Triggers

If you want to know how not to get audited, it can be helpful to understand what may attract IRS scrutiny. The following may be considered red flags:

1. Having a Lot of Cash Transactions

Because it can be challenging to verify income for a business that operates mainly in cash (such as one that sells products at a farmer’s market or a housecleaning business), regularly processing cash transactions can potentially trigger an IRS audit.

For the same reason, making large purchases (like a company car or piece of equipment) in cash can also garner the IRS’s attention.

If you need or prefer to deal mostly in cash, it can be smart to keep clear and accurate receipts of all sales and purchases, and record them in your accounting software.

Recommended: Business Cash Management, Explained

2. Deducting Too Many Expenses

The general rule from the IRS about deducting a business expense is that the expense is “ordinary and necessary” for your line of business.

If you’re unsure about whether a meal, fill-up at the gas station, or a travel expense falls squarely in the realm of ordinary and necessary, it can be a good idea not to claim it on your tax return.

A sudden increase in the amount of tax deductions your claim from one year to the next can also be a red flag to the IRS.

3. Excessive Claims of Business Use for a Vehicle

While car expenses are a legitimate expense for business owners, the IRS may look more closely at your return if you claim 100% business use of a vehicle.

If you do use a car exclusively for business, it can be a good idea to document all of your vehicle expenses, including the purpose of each trip.

4. You’ve Misclassified a Contractor

You may have freelance contractors who work for you, but there are rules about at what point you need to classify a contractor as an employee. For example, if you have 10 contractors who work 40 hours a week and no full-time employees, that might indicate to the IRS that you’re trying to get around paying payroll taxes.

5. Not Reporting All of Your Income

If you do not report all of your income, you may well hear from the IRS. For example, if you receive 1099s (because you work as a contractor for others), your 1099s must match up to what you’ve reported as income on your taxes. A discrepancy could trigger an audit.

6. Reporting Round Numbers and Making Calculation Mistakes

While rounding numbers can be convenient, the IRS might notice if a business isn’t using exact numbers to report earnings and expenses. Making a simple math error can also lead to IRS scrutiny, so it can be well worth your time to double-check all of your numbers and calculations.

7. Reporting a Negative Business Income in Multiple Years

If your business has reported net losses in three or more of the past five years of operation, the IRS could potentially want to take a closer look at your books.

8. Filing an Amended Return

While this is not automatically a red flag, it’s better to avoid filing an amended return if at all possible. Because you can’t e-file amended returns, an IRS employee will have to process and accept the return. This gives the IRS a second chance to screen your return. As a result, any small mistakes that may have gotten through the first time could potentially get picked up the second time.

9. Filing Manually

Mailing in a paper return doesn’t make you any more likely to be selected for an audit. However, it does increase the likelihood that you will make a mistake that could trigger an audit. The error rate for paper returns is 25%, compared to 0.5% for e-filed returns.

How Can a Business Audit Benefit Your Company?

An audit of any kind can sound intimidating, but an internal or external audit of your company can actually help your business become more productive. Below are some ways your small business might benefit from an audit.

•  It could make your business more attractive to investors or lenders. If you’re looking to bring on investors, get a small business loan, or sell your company, having an audit can give any potential investors, buyers, or lenders confidence that your company is fiscally responsible and, therefore, a good investment.

•  It might shine a light on problems, as well as opportunities for growth. An audit can expose inefficiencies, fraud, or employee theft. It might also reveal that a particular product is selling well and prompt you to expand on that line.

•  It can make it easier to file your business taxes. The process of auditing can force you to get all your numbers and financial statements in order, which can make filing your taxes at the end of the year significantly easier. If it makes the process faster for your account, that could also save you money.

•  It can enable you to receive business certifications. Many business certifications (such as ISO 9001, an internationally recognized standard for quality control) require regular business audits.

Preparing for Audits

The most time-consuming step of preparing for an audit is often gathering all the financial documents you may need. What will be required will depend on who is doing the audit and the purpose of the audit.

For an IRS audit, you may want to gather the following documents:

•  Bank statements, canceled checks, and receipts The auditor will likely want to see bank records from all of your accounts, both personal and business.

•  Books and records Whether all you have is a checkbook and cash register tapes or you maintain balance sheets, ledgers, and journals, the auditor will likely want to see your business records.

•  Appointment books, logs, and diaries An entry in a business diary can help justify an expense to an auditor if it appears to be reasonable.

•  Records for certain equipment If you use certain equipment, like a cell phone or a car, for both business and personal use, you will likely need to show records of usage.

•  Records for travel and business-related meals You may need to show written records of the specific business purpose of the travel and the costs you incurred, as well as receipts.

Recommended: Personal Loan Alternatives

Finding the Right Auditor

A qualified auditor will have an active CPA license, as well as an active external auditor certification from the AICPA (Association of International Certified Professional Accountants). Specialized auditors may have additional certifications, such as the CFE (Certified Fraud Examiner).

When vetting potential auditors, you’ll want to make sure they have experience with firms in your industry and that they’re well-versed in your internal accounting software. You may also want to ask them to spell out their process in a proposal, and to provide references and/or testimonials from companies similar to your own. You can also look for reviews online.

Making Sense of an Auditor’s Reports

Whether you undergo an internal or external audit, you will receive the auditor’s report. This consists of a written letter from the auditor (attached to your company’s financial documents) that describes the focus, scope, and set of standard accounting practices held for the audit. It will also include the auditor’s opinion. which may be:

•  Clean or Unqualified Report (no issues)

•  Qualified Opinion (the company did not follow the proper accounting standards, but did not break any laws or compliance rules)

•  Adverse Opinion (the company did not follow acceptable accounting practices and there were discrepancies in the company’s financials)

•  Disclaimer of Opinion (the auditor could not complete the audit or has chosen not to provide their opinion due to lack of impartiality or adequate information)

The Takeaway

A small business audit may not be fun, but there is no need to dread the possibility of it happening. Doing an internal audit can actually be an effective way to spot inefficiencies and make improvements that help grow your business.

If you’re seeking financing for your business, SoFi can help. On SoFi’s marketplace, you can shop top providers today to access the capital you need. Find a personalized business financing option today in minutes.

Get personalized small business financing quotes with SoFi's marketplace.


What are the different kinds of business audits?

The most common business audits are internal, performed internally by a company to assess their processes and legal compliance and identify ways to improve performance, and external, a financial review that is conducted by a party not associated with the company or department that is (voluntarily or involuntarily) under audit.

What causes businesses to get audited?

By law, the annual financial statements of public companies must be audited each year by independent auditors. Private businesses may need to undergo an audit if they apply for certain grants, loans, special certifications, or government contracts. Also, any business can be audited by the IRS (Internal Revenue Service), randomly or if the IRS finds any discrepancies or errors in the company’s tax return.

What happens when your small business gets audited?

If you are audited by the IRS, you may simply receive a letter specifying possible errors in your tax return. You can then explain or correct these issues by sending the IRS additional documentation. A field audit by the IRS entails a visit from an IRS agent who will review your business’s financial statements, past tax returns, and other relevant documents and interview you in person.

Photo credit: iStock/PeopleImages

SoFi's marketplace is owned and operated by SoFi Lending Corp. See SoFi Lending Corp. licensing information below. Advertising Disclosures: SoFi receives compensation in the event you obtain a loan through SoFi’s marketplace. This affects whether a product or service is featured on this site and could affect the order of presentation. SoFi does not include all products and services in the market. All rates, terms, and conditions vary by provider.

Financial Tips & Strategies: The tips provided on this website are of a general nature and do not take into account your specific objectives, financial situation, and needs. You should always consider their appropriateness given your own circumstances.

Tax Information: This article provides general background information only and is not intended to serve as legal or tax advice or as a substitute for legal counsel. You should consult your own attorney and/or tax advisor if you have a question requiring legal or tax advice.


All your finances.
All in one app.

SoFi QR code, Download now, scan this with your phone’s camera

All your finances.
All in one app.

App Store rating

SoFi iOS App, Download on the App Store
SoFi Android App, Get it on Google Play

TLS 1.2 Encrypted
Equal Housing Lender