DOL Wage and Hour Audit: What Investigators Ask For and How to Prepare

A DOL wage and hour audit is an investigation by the Wage and Hour Division (WHD) into whether you pay minimum wage and overtime correctly and keep the required records. Investigators typically ask for payroll records, time records, pay rates, job descriptions and proof of exemptions for a defined period, usually the last 2 to 3 years. The best preparation is to have clean, accurate time and pay records before anyone asks.

This guide covers what triggers an audit, the documents investigators usually request, what happens during the process and how to prepare. This is general information, not legal advice: if you receive a notice, involve an employment attorney early.

What can trigger an investigation

The WHD opens investigations for several reasons. A complaint from a current or former employee is the most common trigger. Others include industry-wide enforcement efforts in sectors with frequent violations, referrals from other agencies and findings in a prior investigation.

You do not need to have done anything deliberately wrong to be investigated. Small errors in overtime calculations, misclassified employees or missing records can all lead to findings.

Investigators are trained to look beyond a single employee. A complaint from one worker often leads to a review of the whole workplace, so one error in a shared process can multiply across everyone who is covered by it.

What investigators ask for

Requests vary, but the core documents come from the recordkeeping rules in 29 CFR Part 516. Expect to be asked for items such as:

- Payroll records showing names, addresses, occupations, pay rates, hours, earnings and deductions, which must be kept for 3 years.

- Time cards and schedules, which must be kept for 2 years.

- Exemption documentation, including job descriptions, salary information and evidence of the duties performed.

- Policies, such as handbook sections on timekeeping, breaks and overtime approval.

If you cannot produce these, the investigator may rely on employee interviews and reasonable estimates. We list the full set in FLSA timekeeping requirements.

Prepare a single folder, paper or digital, with your handbook, pay policies, organizational chart, exemption analyses and a sample of recent time and pay records. Having it ready shows good faith and shortens the process considerably.

How the process usually works

The investigator typically contacts you, schedules an opening conference, requests documents, may visit the workplace and interview employees privately, and then holds a closing conference to discuss findings. If violations are found, the WHD generally asks for back wages and may seek an equal amount in liquidated damages or civil money penalties in certain cases. The specific penalty amounts depend on the violation, so confirm the current figures with the DOL or counsel.

Employees are protected from retaliation for participating, and you should not discourage anyone from speaking with the investigator.

Be aware that investigators generally look at the previous 2 years and may go back 3 for willful violations, which matches the statute of limitations. If your records for that period are incomplete, ask counsel how to present what you do have.

The problems that turn up most often

Investigators repeatedly find the same issues:

- Unpaid overtime because hours across multiple locations or pay periods were not combined within one workweek.

- Regular rate errors, where bonuses or shift differentials were left out of the overtime calculation.

- Off-the-clock work such as pre-shift setup or after-hours calls that were never recorded.

- Misclassified exempt employees whose duties or salary do not meet the test.

- Rounded or identical time entries that suggest hours were not recorded as worked.

A worked example of an audit finding

Say an employee earns $18.00/hour and also receives a $200.00 nondiscretionary attendance bonus in a week when she works 45 hours. The employer calculated overtime on $18.00 only. Correct math: straight-time pay 45 x $18.00 = $810.00, plus bonus $200.00 = $1,010.00 total straight-time pay. Regular rate: $1,010.00 / 45 = $22.44. Overtime premium owed: 5 hours x ($22.44 x 0.5) = $56.10.

The employer paid a premium of 5 x ($18.00 x 0.5) = $45.00, so the underpayment is $11.10 for that week. It looks small, but repeated every week for 2 years (about 104 weeks) it becomes $1,154.40 for one employee, and an investigator would multiply that across the team. Liquidated damages can double it.

The example also shows why automatic calculations matter. A payroll clerk who computes overtime by hand on the base rate will repeat the same mistake every week, and the audit will find the pattern across the whole payroll register, not just one pay stub.

How to prepare before you receive a notice

Run your own review. Pull a sample of recent pay periods and compare time records to pay stubs. Check that overtime is calculated per workweek, that the regular rate includes bonuses and differentials, and that exempt employees meet the tests. Confirm that you retain records for the required periods and that your records are organized so you can produce them quickly. See exempt vs. nonexempt employees for the classification checks.

If you find an error, consult counsel about correcting it. Paying back wages voluntarily and fixing the process is usually better than waiting to be found.

Consider a short written checklist for each pay period: confirm that every nonexempt employee has complete punches, that edits are approved, that overtime is computed on the regular rate and that exempt employees still meet the salary level. A review that takes 30 minutes per pay period is far cheaper than an investigation.

What to do if you receive a notice

Do not ignore it and do not destroy or alter records. Gather the requested documents, confirm the scope and deadlines with the investigator in writing, and consider having an employment attorney participate. Keep communications factual, and make sure managers know not to pressure employees about their statements.

Understanding the consequences of a violation also helps you decide how to respond. Our article on wage and hour lawsuits and back pay explains the exposure.

How SimpleWorkshift Helps You Stay Audit-Ready

SimpleWorkshift stores time-stamped entries from the iOS or Android app and the web, each with a GPS location, so you can show when and where work was recorded. Automatic overtime calculations, including night shift differentials, reduce manual math errors, and a real-time view of time entries and exceptions helps you catch problems before payroll closes.

Custom reports and dashboards let you pull hours by employee, day and workweek in minutes, which is what investigators ask for. The product is built with FLSA compliance in mind. Try it free for 30 days at simpleworkshift.com, with no contracts and the option to cancel anytime.