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What are Internal Controls?

Internal controls are the policies and procedures a company puts in place to safeguard assets, ensure accurate financial records, and prevent or detect fraud and errors. They range from requiring dual signatures on checks to reconciling bank statements every month. Strong internal controls are essential for reliable financial reporting and are a core focus of every audit.

Short answer

Internal controls are the processes and safeguards a business uses to protect its assets, ensure accurate accounting records, and prevent or catch errors and fraud.

Preventive vs. Detective Internal Controls
Preventive controls (stop problems before they happen)
  • Segregation of duties
  • Requiring dual signatures on large checks
  • Password-protected accounting systems
  • Pre-approval for purchases
Detective controls (find problems after they happen)
  • Bank reconciliations
  • Physical inventory counts
  • Internal audits
  • Variance analysis on budgets
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Step-by-step worked examples

A $10,000 wire transfer requires sign-off from both the controller and the CFO before it is sent. What type of control is this, and why?

This requires two people to approve before the transaction happens
It's a preventive control (segregation of duties / dual authorization)
It reduces the risk of one person committing fraud undetected

At month-end, the bookkeeper compares the bank statement balance of $42,300 to the company's cash ledger balance of $41,950 and investigates the $350 difference.

This comparison happens after transactions are recorded
It's a detective control (bank reconciliation)
The $350 gap is traced to an outstanding check, confirming no fraud or error

A retail store counts its physical inventory every quarter and compares it to the $150,000 recorded in the accounting system.

The count happens after goods have already moved in/out
It's a detective control (physical inventory count)
Any difference from the $150,000 book value signals theft, damage, or recording errors
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Flashcards

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Quick quiz

Q1.Which is an example of a preventive control?

Correct answer: B. Dual signatures stop unauthorized payments before they happen — that's preventive.

Q2.A monthly bank reconciliation is what type of control?

Correct answer: B. It finds discrepancies after transactions occur, so it's detective.

Q3.What is the main goal of internal controls?

Correct answer: B. Internal controls protect assets and support reliable financial reporting.

Q4.Segregation of duties means…

Correct answer: B. Splitting related duties among different people creates checks and balances.
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Common mistakes

Internal controls are only needed in large corporations.Correct: Even small businesses need basic controls like dual signatures and reconciliations to prevent fraud.

Detective controls prevent fraud from happening.Correct: Detective controls find problems after they occur; preventive controls stop them beforehand.

Having one trusted employee handle cash from start to finish is efficient and safe.Correct: This violates segregation of duties and increases fraud risk, regardless of trust.

Internal controls guarantee zero fraud or errors.Correct: They reduce risk significantly but can't eliminate it entirely — that's why audits still exist.

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FAQ

What are internal controls in accounting?

Policies and procedures a company uses to protect assets, ensure accurate records, and prevent or catch fraud and errors.

What are the main types of internal controls?

Preventive controls (stop problems before they happen) and detective controls (find problems after they happen).

What are examples of internal controls?

Segregation of duties, dual signatures on checks, bank reconciliations, and physical inventory counts.

Why are internal controls important in a business?

They protect company assets, improve the reliability of financial statements, and reduce the risk of fraud or costly errors.

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