How Do I Audit Payroll Without Being an Expert?

A payroll audit sounds like something that requires a CPA, a compliance attorney, and a full week of uninterrupted focus. It does not. What it requires is a clear checklist, the right reports pulled from your payroll system, and the willingness to look at the numbers with fresh eyes.

You do not need to be an expert to audit payroll. You need to know what questions to ask and what answers should concern you. The expertise comes in when something looks off. The audit itself is a pattern-recognition exercise, and you are more capable of that than you think.

Here is how to do it.

Start with the employee roster

Pull a full list of everyone currently in your payroll system and compare it against your active employee list. This sounds simple and it is, but it catches more errors than almost anything else.

Look for employees who are in payroll but should have been terminated. Look for employees whose start dates do not match your records. Look for anyone coded as a contractor who should be classified as an employee, or vice versa. Ghost employees, people who were terminated but whose payroll records were never closed out, are more common than most founders expect and they represent both a financial loss and a compliance risk.

While you are in the roster, confirm that every employee has a current W-4 on file and that the withholding elections in your payroll system match what they actually submitted. A mismatch here means someone is either being over or under-withheld and does not know it.

Check your pay rates against your offer letters

Pull the current pay rate for each employee and match it against the most recent documented rate change, whether that is an offer letter, a promotion memo, or a compensation review form. You are looking for two things: rates that were changed in the system without documentation, and rates that should have been updated but were not.

Pay rate errors are embarrassingly common. An employee gets a raise, the manager approves it, HR sends the update to whoever processes payroll, and somewhere in that chain the wrong number gets entered or the update does not go through at all. The employee may not say anything for months, especially if the difference is small.

The back pay exposure on an underpayment that went undetected for a year is a real number. Find it before they do.

Review your overtime calculations

If you have non-exempt hourly employees, overtime is one of the highest-risk areas in payroll. The FLSA requires overtime pay at one and a half times the regular rate for all hours worked over 40 in a workweek. That sounds straightforward. It is not.

The regular rate of pay is not always just the hourly wage. If employees receive bonuses, shift differentials, or other non-discretionary additional compensation, those amounts may need to be factored into the overtime rate calculation. Most payroll systems do not do this automatically unless configured correctly.

Pull three months of timesheets for any employee who regularly works close to 40 hours and confirm that weeks over 40 hours are showing overtime pay at the correct rate. If the math does not work, you have a liability.

Look at your deductions line by line

Pull a deductions report for the most recent pay period and go through each deduction type. Health insurance premiums, 401(k) contributions, HSA deposits, garnishments, and any other voluntary deductions should all reconcile against what employees elected during open enrollment or onboarding, and against what you are actually remitting to those carriers.

A deduction that is coming out of the employee paycheck but not being forwarded to the carrier is a serious problem. It means employees have less take-home pay than they expect and are not receiving the coverage or contribution they paid for. This is one of the compliance issues that generates employee complaints and regulatory attention quickly.

Also check whether any deductions are still active for employees who waived coverage or are no longer eligible. Term life and disability deductions in particular tend to linger in systems long after they should have been removed.

Confirm your tax deposits and filings are current

You do not need to be a tax professional to verify this. Log into the IRS EFTPS portal and confirm that federal payroll tax deposits are posting on schedule. Check your state agency accounts for state income tax and unemployment deposits. If you use a payroll provider, pull the tax liability report and confirm that what was withheld matches what was deposited.

Then look at your filing schedule. Form 941 is filed quarterly. FUTA deposits have their own schedule. State agencies have their own quarterly and annual filings. If any of these are showing as overdue or unsubmitted in your payroll system, that is not a future problem. It is a current one.

Know when to hand what you found to someone else

The audit itself is something you can do. What you do with the findings may require a professional.

If you find a pay rate discrepancy, you can calculate back pay and issue a correction. If you find a misclassified employee, you need HR or employment counsel to help you assess the exposure before you make any changes. If you find a tax deposit gap, you need your payroll provider or a payroll tax specialist involved immediately because correcting those issues has specific timelines and forms attached to them.

The goal of a non-expert payroll audit is not to fix everything yourself. It is to surface what is there so the right people can address it before it becomes a penalty, a complaint, or a lawsuit. That is a job you are fully capable of doing.

About Savvy HR Partner

Savvy HR Partner is an HR and payroll consulting firm that helps growing organizations build strong people operations. We specialize in HR strategy, compliance, employee relations, policy development, compensation guidance, and payroll support designed to scale with your business.

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