In a small company, the controller often carries responsibilities that would be divided among several people at a larger organization. One person may enter transactions, manage accounts payable, complete the monthly close, reconcile payroll, prepare board reporting, and respond to requests from the CEO. That same person may also be the closest thing the company has to an audit function. There is no internal audit department, no compliance specialist, and often no independent reviewer waiting to examine the controller's work.
The central control problem is therefore structural. Duties that should be separated are concentrated in one role, and a company with a small finance team cannot solve that entirely by hiring more people. A controller can make an error, approve an entry, and carry the issue through the close without intending to do anything wrong. The control environment has to recognize that reality rather than pretend the company has the staffing of a much larger organization.
The weakness usually becomes visible when the first external audit arrives. The auditor asks for evidence that reconciliations were completed, manual journal entries were approved, and ERP access was limited to people who required it. If the evidence exists, the controller can produce it. If it does not, the controller must reconstruct months of activity while continuing to run finance.
For a company of 25 employees, the practical objective is not a full internal audit function. It is a small, dependable group of controls that a two-person finance team can operate consistently as the business grows. A framework that is too elaborate will be neglected. A framework that is narrow, documented, and reviewed can provide useful protection before a dedicated audit or compliance hire is possible.
The Controller Becomes the First Line of Audit
In a larger organization, transaction entry, reconciliation, close management, and approval authority would normally be distributed across different positions. In an early-stage company, those activities can sit with the controller. That concentration creates the main exposure: an error or misconduct can remain undetected because the same person controls several steps in the process.
Personnel changes alone cannot remove this exposure. You cannot separate duties that belong to one person when only one person is available to perform them. The workable answer is compensating review. It should be limited enough to maintain and specific enough to catch the entries most likely to create trouble.
One useful measure is a scheduled review by the CEO or CFO of a meaningful portion of journal entries. The review should focus on higher-risk categories rather than attempt to inspect everything. Manual entries above a threshold, end-of-period accruals, and postings to balance sheet accounts deserve particular attention. The reviewer does not need to perform the controller's job. The useful questions are whether the entry has a clear business reason, what it represents, and whether the supporting documentation makes sense. The schedule and completion of that review should be recorded.
The ERP should also require an approval event for manual entries above a defined threshold. In a genuine staffing emergency, the person entering an item may still be the person who approves it, but the formal approval requirement creates a review point in the system record. It also shows when the approval occurred in relation to the posting date. That evidence is more useful than an informal statement that someone looked at the entry.
A third compensating measure is automated monitoring of the journal entry feed. This is not a judgment about the controller's integrity. Small companies move quickly, and an overloaded controller has less capacity to spot unusual activity. Automated rules can identify high-risk patterns and send the limited human review time toward the entries that warrant closer examination.
The Smallest Control Package Worth Maintaining
A control process that is written once and abandoned is weaker than a modest process that is completed every period. Abandoned procedures create the appearance of coverage without producing evidence. The following set is deliberately limited. It is intended to remain workable through the company's first few years and its first external audit.
Begin with a signed close checklist for every reporting period. It does not need to become a long manual. It needs to show that the important reconciliations were performed, identify who performed them, and record when they were completed. If a problem appears three months later, the checklist helps establish which period was last completed cleanly. A dated, signed page in a shared folder, approved by the controller, addresses much of the evidence an auditor will seek on this point.
Keep ERP permissions conservative from the start. Give each new user only the access required for the role. Perform access reviews quarterly. When an employee changes responsibilities or leaves, revise the access during that same week. The system may make it easy to grant access and forget about it. The control is the recurring review and the record showing that the review happened.
Write down approval thresholds for manual journal entries and apply them consistently. Entries below $500 can be posted by the controller without additional approval. For entries from $500 to $5,000, the controller can post them, with the CFO or CEO reviewing within 24 hours. Entries above $5,000 should be reviewed before they are posted. A company can adjust these amounts to fit its size. The important features are that the limits are documented, understood, and followed.
Maintain a reconciliation schedule with a named owner and a defined frequency for every balance sheet account. The schedule should be a working document, not knowledge held by one person. When a second finance employee joins or the controller changes roles, the schedule should tell the next person what must be reconciled, how often, and who is accountable. In small companies, the gap is often not that reconciliations never occur. It is that no one has clearly established which accounts require work and on what timetable.
Select an ERP That Leaves a Usable Record
Many early-stage companies begin with QuickBooks and later consider NetSuite, Sage Intacct, or another mid-market ERP. The decision often becomes urgent when an external audit is approaching or the board wants more detailed reporting. A migration at that point is not only a software project. It is also a chance to correct permissions, approval routes, and the quality of the transaction history before scrutiny increases.
Control capabilities should be explicit selection criteria during that process. Ask whether the system provides granular, role-based access; preserves an immutable audit log for journal entries and changes; and supports approval workflows for manual postings. The system should make it difficult to rewrite history and should clearly identify who posted an item and when.
NetSuite generally handles these requirements well and is a common choice for companies in this segment. Sage Intacct includes strong segregation-of-duty controls. Oracle and SAP products offer more extensive controls frameworks, although their configuration burden is substantially greater than an early-stage company usually needs or can maintain. The right decision is not the product with the most features. It is the system that provides a dependable audit trail without creating a process the team cannot operate.
Do not configure an ERP so that one user can post and self-approve unlimited manual entries without any recorded review. That deficiency is likely to surface during the first external audit. Correcting it later may require new access settings, re-performance of reconciliations, and an explanation to auditors covering the period when the control was absent.
Use Monitoring to Spend Review Time Where It Counts
A controller cannot reasonably inspect every journal entry by hand when the ledger contains several hundred monthly postings for payroll, vendors, accruals, and intercompany activity. Full-population manual review consumes time that a small finance team also needs for close management, reconciliations, and reporting.
Automated journal entry monitoring addresses a narrow operational problem: it identifies patterns that merit attention and helps the controller prioritize. With real-time flagging, the exception queue is available during the period rather than only at close. An entry posted incorrectly on day three can receive a review event on day three instead of waiting for the reconciliation on day 25, after the error may have affected other work.
The practical difference is the amount of useful review a small team can complete. Instead of examining 400 entries, the controller might work through 12 flagged entries, clear the items that have a valid explanation, and investigate the 2 that need investigation. That approach makes better use of scarce review capacity and creates a clearer record of what was considered than an occasional spot check.
Centinel Monitor is priced for this customer profile at $390/month for up to 5,000 journal entries. That capacity covers the 20-100 employee range, depending on transaction complexity. Its standard rule library addresses common high-risk patterns out of the box, allowing a team to receive useful monitoring results from the first period without a substantial configuration project.
Keep the Framework Proportionate to the Company
Large-enterprise control frameworks assume dedicated audit teams, several reporting layers, and specific regulatory obligations. Transplanting that model into a 30-person company can produce documentation that nobody reads and procedures that stop being followed after the first quarter. This article is not a proposal to build a full internal audit function or reproduce a large-enterprise compliance program.
A more useful test is operational. If something went wrong in the financial statements, would the company discover it within a month? Could the team explain what happened to an auditor using retained documentation? If the answer is yes, the controls are doing their job. If the answer is no, the missing step is worth addressing.
At this stage, the most valuable controls address familiar failure points: unauthorized postings, errors that remain uncorrected, and missing evidence. A signed close checklist, restrained ERP permissions, automated journal entry monitoring, and written approval thresholds cover substantial ground. They are also controls that a two-person finance team can continue to perform, which is the practical test for any procedure that exists on paper.
Build for the audit that is 18 months away, not for the compliance program that would make sense at 500 employees. The aim is a control environment that holds up, grows with the business, and can keep running without a dedicated compliance hire.