Internal control weaknesses can undermine your operational efficiency, disrupt your financial reporting and threaten your relationships with stakeholders. They also tend to emerge at the most inconvenient times, such as during an audit or while preparing for fundraising.
In this guide, we’ll explore what internal control weaknesses are, why they often appear as you scale and some of the most common examples. We’ll also discuss how to prevent them from becoming a material weakness and when it makes sense to bring in additional support.
What Are Internal Control Weaknesses?
Internal control weaknesses are flaws in your company’s internal controls that increase the risk of errors or fraud, especially related to financial reporting. Per Public Company Accounting Oversight Board (PCAOB) standards, auditors more formally refer to them as “internal control deficiencies.”
These weaknesses or deficiencies fall into two primary categories:
- Deficiencies in design: These exist when an internal control is either missing or designed in such a way that even if it were executed properly, it would fail to achieve the intended control objective.
- Deficiencies in operation: These exist when a properly designed internal control is present but not performed correctly. This could be because the person managing it lacks the necessary authority or ability.
Auditors also classify internal control weaknesses by their level of severity. A “significant deficiency” is one that’s important enough to merit attention by those overseeing your company’s financial reporting.
Meanwhile, a “material weakness” is the most significant level of deficiency. When one is present, it means there’s a reasonable possibility that a material misstatement exists in your financial statements—and that you won’t prevent or detect it in a timely manner.
Why Internal Control Failure Happens During Growth
While internal control weaknesses can stem from negligence, they more often arise as a byproduct of growth. As your company scales, it’s only natural that processes evolve, responsibilities shift and systems change.
In theory, internal controls should evolve alongside these developments. In practice, they frequently lag behind, creating gaps where existing controls no longer operate as intended or fail to address emerging risks.
This is especially common when early-stage companies begin hiring and expanding their tech stack. New employees take over responsibilities that were once tightly managed, while new systems shake up familiar workflows.
When controls are designed around founder-led processes, these changes tend to expose their limitations. Direct oversight becomes increasingly ineffective as accountability for tasks spreads across a growing team.
For example, imagine your company is gaining traction in a new market, causing financial transaction volume to increase. As a result, you expand your internal accounting team and implement a new bookkeeping platform.
Without clearly defined responsibilities for your month-end close, tasks like account reconciliations may start to fall through the cracks. Even if the control was once effective, applying it inconsistently creates an operating deficiency.
Examples of Internal Control Weaknesses
While every business’s operations are unique, control deficiencies often fall into a handful of familiar categories. Here are some common examples of internal control weaknesses to watch for, especially as your company grows:
- Poor segregation of duties: When one person is responsible for multiple parts of a process, it often creates gaps in oversight. For example, if the same employee can set up a new vendor, approve invoices and process payments, they could create a fake vendor and pay themselves without anyone noticing.
- System access weaknesses: Employees should only have access to the systems and functions they need to do their jobs. When permissions are too broad, or you don’t update them as roles change, it increases the risk of data manipulation and other unauthorized actions.
- Inconsistent control application: Even the best-designed controls break down if you fail to apply them consistently. For example, this often affects controls like reconciliations. When you delay or skip them altogether, it allows errors or instances of fraud to accumulate over time.
- Ineffective review processes: Reviews are only useful when the person reviewing is actually paying attention. If approval workflows become routine or people start going through the motions, it’s easy for red flags to go unnoticed when your controls should have caught them.
- Under-documented procedures: When process documentation is missing or incomplete, your team has to rely on memory and judgment. That makes execution inconsistent and increases the risk of inaccuracies, especially as new employees onboard or responsibilities shift.
Even with strong internal controls in place, it’s important to recognize that you can’t eliminate risk completely. For example, proper segregation of duties and access controls may reduce the likelihood of fraud, but they can’t prevent situations where multiple individuals collude.
According to the Association of Certified Fraud Examiners (ACFE), 19% of fraud cases in 2024 occurred due to an override of existing controls rather than a lack of them.
How to Fix Internal Control Weaknesses
If you’ve identified internal control weaknesses—whether through an audit, investor diligence or internal review—it’s important to address them before they escalate. Even minor deficiencies can grow into serious issues, especially as your business scales.
Start by targeting your highest-risk weaknesses, which are those most likely to result in material misstatements through error or fraud. This often includes controls around cash, revenue recognition, and financial reporting close processes.
If time is limited, focus on addressing the weakness with tactical fixes first. This often involves implementing compensating controls, such as a secondary review. You may not solve the issue completely, but you can significantly reduce risk in the short term.
Once things are stable, take a step back and consider making more structural improvements. In many cases, the most effective way to fix your controls is to redesign the related processes, making them more scalable or efficient.
As you update your workflows, take the time to update your documentation to match, including who is accountable for each step. This helps ensure your team continues to execute correctly going forward.
Pro Tip: When redesigning processes, make sure to involve the people responsible for carrying them out. They’ll often have the best insight into where control breakdowns occur and how to prevent them.
Preventing a Material Weakness
If you suspect a control deficiency could escalate into a material weakness, it should immediately become a top priority. Material weaknesses have significant consequences, not just for your financial reporting, but for how external stakeholders view you.
For instance, if an external auditor discovers a material weakness, they must disclose it in their audit report. This can raise serious concerns about the reliability of your financials for prospective investors, potentially delaying or costing you fundraising.
As a result, it’s essential that you assess the risk of escalation early. One of the clearest warning signs is when multiple control deficiencies exist within the same process. They may seem manageable individually, but in combination, they can create a broader gap that increases the likelihood of a material misstatement.
You should also pay special attention to controls related to high-risk areas. Beyond areas like cash management and revenue recognition, that often includes controls around system access and information technology.
Last, it’s important to keep a close eye on controls that rely heavily on a single individual. When processes revolve around one person’s knowledge or involvement, turnover, bandwidth constraints or simple oversight can create significant deficiencies.
When to Bring in Experienced Finance Leadership
If your internal team lacks the bandwidth or expertise to manage internal controls effectively, consider bringing in outside support. Fractional or interim finance leaders can help assess risks, design or implement controls, and accelerate remediation efforts.
Their assistance is often especially valuable when you’re scaling rapidly, preparing for fundraising or undergoing your first audit. Control issues often surface during these critical growth periods, when you can afford them the least.
Don’t wait for problems to escalate before getting help. Fixing deficiencies after they’ve created audit friction or shaken stakeholder confidence is much more difficult than addressing them proactively.
Fortunately, because outsourced finance professionals typically offer a range of flexible engagement structures, you can often benefit from their expertise for a fraction of the cost of a full-time executive.
Navigate Internal Controls With Paro
Internal control weaknesses can disrupt operations and damage credibility, especially if you neglect them as your business grows. However, addressing risks proactively can help prevent significant deficiencies and turn failing processes into sources of strength.
Whether you’re facing an audit or investor due diligence, Paro’s internal assurance services can help you resolve control deficiencies before they escalate. Schedule a free consultation to connect with the right expert for your business needs.
