Implementing a strong internal control system is one of the most effective ways to protect business assets and maintain accurate financial records. Yet many organizations don’t evaluate their controls until a problem occurs. A midyear review can help you identify weaknesses before they lead to costly errors or fraud. It also gives you an opportunity to modify policies and procedures as your operations grow, staffing changes and new technologies are implemented.
Why internal controls matter
Robust internal controls won’t eliminate every risk. But businesses that regularly evaluate and strengthen their policies and procedures are typically far better positioned to prevent problems, detect issues early and maintain reliable financial information.
Weak or outdated controls can expose businesses to a wide range of risks, including employee theft, unauthorized transactions, accounting errors and inaccurate financial reporting. Ineffective oversight procedures can cause fraud schemes to go undetected for long periods. In fact, the median fraud scheme lasted 12 months before detection and caused a median loss of $104,000, according to Occupational Fraud 2026: A Report to the Nations, a recent biennial study published by the Association of Certified Fraud Examiners (ACFE).
Strong internal controls are especially important for smaller private businesses, where limited staffing can make it more difficult to separate responsibilities and maintain oversight. The recent ACFE report found that organizations with fewer than 100 employees experienced the highest median fraud losses among all business sizes — $126,000 per incident.
Start with companywide accountability
Internal controls are most effective when they become part of your business’s culture. Your employees should understand that management takes fraud prevention seriously and that controls exist to protect both the company and its staff.
Clear written policies, ongoing employee training and open communication all help reinforce accountability. Periodically review user-access permissions, approval authority and payment procedures to reduce the risk of unauthorized activity. You may also want to establish anonymous reporting mechanisms, such as whistleblower hotlines, that allow employees to report concerns without fear of retaliation. Per the ACFE, 43% of occupational frauds were detected through tips — nearly three times more than any other detection method. Organizations with formal reporting mechanisms also detected fraud more quickly and incurred lower median losses.
Build stronger oversight procedures
One practical way to strengthen your control system is to segregate duties. Simply put, no employee should control all phases of a financial transaction. For example, the person who receives payments shouldn’t also reconcile the bank account. Likewise, an employee who approves vendor invoices shouldn’t also issue payments. Separating responsibilities makes it easier to detect fraud and errors.
If your business has limited accounting personnel, segregating duties can be more challenging, making management oversight even more important. Regularly review bank statements, canceled checks, payroll reports and reconciliations. You might also outsource certain accounting functions to outside professionals to help strengthen oversight.
Timely financial reporting is another critical component of effective controls. Record transactions promptly and reconcile accounts regularly — not just at year end. Review financial statements monthly or quarterly and investigate unusual fluctuations or unexpected variances. Budget-to-actual comparisons can be particularly useful in identifying irregularities. The ACFE report found that organizations with management review controls experienced fraud losses that were 55% lower than those without such controls.
Also, carefully monitor adjusting journal entries and electronic transactions. Unauthorized adjustments or unexplained electronic transfers can sometimes indicate attempts to conceal improper activity. More than half of fraud cases in the ACFE study occurred due to either a lack of internal controls (33%) or the override of existing controls (19%).
Continuous improvement
Internal controls shouldn’t remain static — they should evolve with your business. Some controls that worked when you were a start-up may no longer provide adequate protection. Technology shifts and market changes may also require you to update your procedures. A midyear review can help you evaluate whether your controls are functioning as intended and identify areas for improvement. Even well-designed policies require ongoing monitoring to remain effective.
© 2026