FLSA Compliance for Public-Sector Employees: A Guide

When a fire department goes into overtime during a major incident, who calculates the pay? When a library adds weekend hours to its schedule, how much extra should it budget? When a school district pays overtime to custodians during summer projects, what's the correct rate — and what's the legal rate?

The Fair Labor Standards Act (FLSA) answers these questions, but the public-sector application is deceptively complex. Unlike private-sector FLSA rules, which are straightforward, public-sector FLSA compliance involves exemption categories that don't exist elsewhere, compensatory time rules that operate under different logic, and cost implications that are frequently miscalculated.

This guide walks HR directors, finance managers, city administrators, and union negotiators through the essential rules, common mistakes, and cost-modeling implications of FLSA compliance in public-sector organizations.

What Is the FLSA and Why It Matters to Public Employers

The Fair Labor Standards Act (enacted 1938, amended 1985 to cover public-sector employers) sets the federal minimum wage, defines overtime requirements, and establishes record-keeping standards for most private and public employers.

The core rule: Any non-exempt employee who works more than 40 hours in a workweek must be paid overtime at 1.5 times their regular rate for all hours above 40. In 2024-25, the federal minimum wage remains $7.25/hour (though many states and municipalities exceed this).

For public-sector employers, the FLSA created a critical exception: governmental entities may choose to provide compensatory time off (comp time) instead of overtime pay in cash, under specific conditions. This is the single greatest cost lever available to municipalities, but it is also the most frequently misapplied.

Why This Matters to Your Budget

In a typical city or county department with 50 employees, assume 8% average annual overtime hours (roughly 165 hours per person, or 2 hours per employee per week on a 2,080-hour annual basis):

Scenario A: Cash Overtime (Private Sector Model)

50 employees × 165 hours OT × $35/hour (average loaded rate) = $288,750/year

Scenario B: Comp Time (Public-Sector Model, if compliant)

50 employees × 165 hours comp time accrued, paid out only upon separation or at end of pay period
Current-year cash cost: $0 (or minimal if policy mandates annual payout)
Liability on balance sheet: $288,750 (accrued expense)

The difference is not that comp time is "free" — it is a deferred liability — but it is a powerful cash flow tool. Fire departments, public works, and utilities routinely exploit this advantage to manage peak-season labor without immediate payroll impact. However, misapplication exposes the employer to wage-and-hour litigation, back-pay assessments, and liquidated damages awards.

Exempt vs. Non-Exempt Employees in the Public Sector

The FLSA defines specific job categories that are exempt from overtime requirements. Exempt employees do not accrue overtime pay, no matter how many hours they work.

The Four Public-Sector Exemption Categories

1. Executive Exemption (Supervisors and Managers)

An employee qualifies for the executive exemption if ALL of the following are true:

• Primary duty is managing the enterprise or a department/subdivision
• Regularly directs the work of two or more employees
• Has authority to hire, fire, or recommend personnel decisions
• Earns at least the FLSA salary threshold ($35,568/year as of January 1, 2025; increases annually; effective July 1, 2025 it rises to $43,888/year)
• Spends at least 50% of time on management duties

Common application: City managers, department heads, principals, assistant principals, fire captains (in some jurisdictions).

Trap for unwary employers: A supervisor who earns $32,000/year is NOT exempt, even if the job title says "supervisor." The salary threshold is federal floor, not negotiable. Similarly, a person with "supervisor" in the title who spends 80% of time doing frontline work (not managing) is not exempt.

2. Administrative Exemption (Office Staff & Policy Decision-Makers)

An employee qualifies for the administrative exemption if ALL apply:

• Primary duty is office/administrative work directly related to management or general business operations
• Primary duty includes discretion and independent judgment on matters of significance
• Earns at least the salary threshold ($35,568/year; $43,888/year starting July 1, 2025)
• Spends at least 50% of time on eligible duties

Common application: HR directors, finance managers, payroll administrators, planning staff, permit coordinators.

Not eligible: Data entry clerks, receptionists, or administrative assistants who follow standardized procedures without independent judgment. These are non-exempt.

3. Professional Exemption (Licensed & Specialized Roles)

An employee qualifies for the professional exemption if ALL apply:

• Primary duty requires knowledge in a field of science or learning customarily acquired through a 4-year degree
• Work is predominantly intellectual, not routine or mechanical
• Earns at least the salary threshold ($35,568/year; $43,888/year starting July 1, 2025)

Common application: Teachers, nurses, engineers, accountants, architects, attorneys.

Special note for educators: Public-school teachers are typically exempt, even when earning below the salary threshold, due to an exemption specific to professional educators. However, paraprofessionals, teaching assistants, and substitute teachers are generally non-exempt.

4. Highly Compensated Exemption

An employee is exempt if:

• Earns at least $107,432/year (as of January 1, 2025) in "total annual compensation"
• Performs office or non-manual work
• Meets the salary threshold ($35,568/year; $43,888/year starting July 1, 2025)

Application: City managers, superintendents, senior directors, senior engineers earning high salaries with less stringent duty analysis.

Public Sector Specific Rules: Section 4(f) & (g)

The FLSA permits public-sector employers to claim exemptions for employees in certain roles that would NOT qualify as exempt in the private sector:

Section 4(f): Elected officials and certain appointed officials (e.g., city council members, county commissioners) are exempt, even if they perform non-managerial work.

Section 4(g): Employees of public-sector legislative and judicial branches may be treated differently than executive-branch employees.

These are rarely misapplied, but they are worth noting if your organization includes elected bodies or court-system staff.

Overtime Calculation: Regular Rate, Overtime Rate, and Special Rules

Once you've determined an employee is non-exempt, overtime rules apply.

The Regular Rate (Overtime Base)

The regular rate is not the same as the hourly rate. It includes all remuneration paid to the employee except:

• Vacation, holiday, sick leave (time off, not worked)
• Health insurance, pension contributions
• Expense reimbursements
• Gifts, bonuses unrelated to hours worked
• Severance

But it INCLUDES:

• Shift differentials
• Longevity bonuses tied to service
• Stipends (coaching, department head, etc.)
• On-call/standby pay
• Lump-sum retroactive pay awarded in a settlement

For a $50,000/year salaried position with $2,000/year shift differential, the regular rate is:

Annual remuneration = $50,000 + $2,000 = $52,000
Hourly regular rate = $52,000 ÷ 2,080 hours = $25.00/hour
Overtime rate = $25.00 × 1.5 = $37.50/hour

If the employee worked 45 hours in a week, overtime pay is:

Regular pay: 40 hours × $25.00 = $1,000.00
Overtime pay: 5 hours × $37.50 = $187.50
Total: $1,187.50 (for that week)

Salary Schedules and Step Advancement Complications

In union environments, salary schedules complicate regular-rate calculations because employees move across steps during a contract year.

Example: A K-12 special education paraprofessional (non-exempt) on a step-and-lane schedule earning $28,000 at Step 2 and advancing to Step 3 at $29,500 mid-year (say, September 1).

Calculation by pay period:

Jan–Aug (8 months, 34.67 pay periods): $28,000 ÷ 26 = $1,076.92 per pay period
Regular rate = $1,076.92 ÷ 40 = $26.92/hour
OT rate = $26.92 × 1.5 = $40.38/hour

Sept–Dec (4 months, 8.67 pay periods): $29,500 ÷ 26 = $1,134.62 per pay period
Regular rate = $1,134.62 ÷ 40 = $28.37/hour
OT rate = $28.37 × 1.5 = $42.55/hour

The step increase also increases the overtime rate — a cost many employers miss during budget forecasting.

Special Case: Fluctuating Workweek

A fluctuating workweek is a schedule in which hours vary week to week. An employee paid a fixed salary for all hours worked (no matter the count) is on a fluctuating workweek.

In this case, the overtime rate is calculated differently:

OT rate = (Regular rate × 0.5) + any statutory minimum ($7.25 × 0.5 = $3.625)

Example: A public-works crew lead earns a fixed $2,600 biweekly salary ($67,600/year) and works 45 hours one week, 38 hours the next.

Week 1: 45 hours
Regular rate = $2,600 ÷ 45 = $57.78/hour
OT pay (not additional OT rate): 5 hours × ($57.78 × 0.5) = $144.45
Total pay for week: $2,600 (salary) + $144.45 (OT premium) = $2,744.45

Week 2: 38 hours (no OT)
Total pay: $2,600

Fluctuating workweek is tricky and only permitted under strict conditions (agreement, consistent application, fixed salary). Consult counsel before adopting this model.

Compensatory Time: The Public-Sector Game-Changer

Public-sector employers (and only public-sector employers, by FLSA Section 7(o)) may provide compensatory time off (comp time) instead of cash overtime, under five strict conditions:

Five Requirements for Compliant Comp Time

1. Written Agreement or Policy: The arrangement must be agreed to in writing (CBA or written policy). A verbal understanding is not compliant.

2. Same Compensation Value: One hour of comp time must be worth the same as one hour of overtime pay. If the overtime rate is $37.50/hour, each hour of comp time owed is worth $37.50.

   Hours of comp time earned = Hours worked over 40 ÷ 2
   Example: 45 hours worked = 5 hours of comp time earned (5 × 1.5 = 7.5 hours paid when used)
   

3. Accrual and Use Limitations:

   • Non-safety employees: May accrue up to 240 hours of comp time (30 days at 8 hours/day)
   • Safety employees (police, fire, corrections): May accrue up to 480 hours (60 days at 8 hours/day)
   • Accrual beyond these limits triggers cash-out obligations

4. Use at Employee's Request: The employee must be able to use accrued comp time when requested, provided it does not unduly disrupt operations. Employers may require 30 days' advance notice and may deny use only if genuinely operationally necessary.

5. Payout at Separation: Upon termination, layoff, or voluntary separation, the employee is entitled to cash payment for all unused comp time at the regular rate (or overtime rate, depending on state law and CBA).

Cost Modeling for Comp Time

Comp time is often framed as "free overtime," but this is misleading. It is a deferred liability.

Balance Sheet Impact:

When an employee earns 100 hours of comp time at $37.50/hour overtime rate, the employer's balance sheet must show:

Accrued Comp Time Liability = 100 hours × $37.50 = $3,750
(Recorded as a liability, reduces free cash flow)

When the employee uses that comp time (or leaves employment), the liability is paid:

Cash Payment = $3,750
Liability reduces to $0

Over a 3-year contract for 50 fire department personnel:

Scenario A: Comp Time Model

Year 1: 50 employees × 20 hours avg comp earned = 1,000 hours × $35/hour = $35,000 liability accrued
Year 2: Additional 1,000 hours earned = $35,000 liability; prior-year usage offsets ~50% = net +$17,500
Year 3: Additional 1,000 hours earned = $35,000 liability; prior-year usage offsets ~50% = net +$17,500

Total 3-year accrual: ~$70,000 (not $105,000, due to usage offsets)
Annual payroll cost: $0 in Years 1-3 if no cash-out
Liability at end of Year 3: ~$50,000-$70,000 (depending on separation rate)

Scenario B: Cash Overtime Model

Year 1: 50 employees × 20 hours avg × $35/hour = $35,000 cash cost
Year 2: Same = $35,000 cash cost
Year 3: Same = $35,000 cash cost

Total 3-year cost: $105,000
Liability at end of Year 3: $0 (paid as earned)

Key insight: Comp time does not eliminate the cost; it defers it. On a 3-year contract, it saves roughly 30-40% in annual cash flow, but creates an off-balance-sheet obligation. This is attractive for tight cash-flow periods, but risky if turnover rates are high or if the organization faces layoffs.

Mandatory Cash-Out Provisions

Many states and CBAs require employers to pay out accrued comp time:

• Annually: Once per year (e.g., December 31), all unused comp time is paid in cash
• Biannually: Twice per year, limits carried forward
• Quarterly: Limits the maximum accrual and forces cash payout
• At Separation: Only paid upon termination (federally compliant, but unusual in modern practice)

Illinois Example: Many Illinois municipalities have CBA language requiring annual comp time payout on December 31, regardless of accrual limit. This effectively converts comp time into a mandatory bonus. If 50 employees average 80 hours of comp time accrued at year-end, and the average overtime rate is $32/hour:

Annual mandatory payout = 50 × 80 × $32 = $128,000
This must be budgeted as a separate line item in December.

Common FLSA Compliance Mistakes in Public Sector

Mistake 1: Misclassifying Supervisors as Exempt

A common trap: a supervisor earning $34,000/year (below the $35,568 threshold as of early 2025) is paid a salary and told they are "exempt" because of the title. This is non-compliant. Until that salary reaches the threshold, the person is non-exempt and must be paid overtime.

Cost Impact: An employee paid $34,000/year who works 50 hours/week earns an additional $10,400/year in overtime (10 extra hours × $52/week × 20 weeks), plus retroactive liability if misclassified for years prior.

Mistake 2: Failing to Include Shift Differentials in Regular Rate

A night-shift police dispatcher earning $42,000 base + $3,000 shift differential ($45,000 total) sometimes has employers calculate overtime using only the $42,000 base:

WRONG: $42,000 ÷ 2,080 = $20.19/hour; OT rate = $30.29/hour
CORRECT: $45,000 ÷ 2,080 = $21.63/hour; OT rate = $32.45/hour

Over a year, this error costs $2,484 per employee undercompensated.

Mistake 3: Comp Time Non-Compliance (Accrual Over Limits, Denial of Use, No Agreement)

• Over-accrual: Allowing safety employees to accrue 600 hours (over the 480 legal limit) and not paying cash-out obligation triggers back-pay liability.
• Denial of use: Permanently refusing an employee's comp time request (rather than temporarily, for operational need) is a violation. Employees have accrued a vested right.
• No written policy: Telling employees "we offer comp time" without a signed agreement or documented policy is not FLSA-compliant.

Mistake 4: Mishandling Salary Schedule Increases During Overtime Calculation

When a non-exempt employee receives a salary increase mid-year, the new regular rate (and thus overtime rate) applies only to hours worked after the increase date. Employers sometimes calculate all prior-year overtime using the new rate, overpaying, or underpaying inconsistently.

Mistake 5: Not Accounting for Comp Time Liability in Financial Statements

Many public entities do not reserve a liability account for accrued comp time, leading to unbudgeted cash outflows at year-end when comp time is paid out. GASB Statement No. 62 (and successors) require that comp time be recognized as a liability in government-wide financial statements.

State-Specific Considerations

While the FLSA is federal, several states impose stricter rules:

Action item: Verify your state's requirements with your legal counsel. State law that is MORE protective than FLSA controls.

How to Calculate FLSA Compliance Costs in Your Budget

Step-by-Step Cost Model

1. Identify Non-Exempt Positions List all job titles that are non-exempt. Assume any position earning below the salary threshold is non-exempt unless proven otherwise.

2. Estimate Overtime Hours Review historical timesheets for the past 2-3 years. Calculate average hours over 40 per week per position.

Example: Parks maintenance crew, 6 employees
Year 1: 240 OT hours total
Year 2: 185 OT hours total
Year 3: 310 OT hours total
Average: (240 + 185 + 310) ÷ 3 = 245 hours/year ÷ 6 employees = 40.8 hours/employee/year

3. Calculate Regular Rate for Each Position Include base salary + all included remuneration (differentials, stipends, etc.). Divide by 2,080.

4. Project Overtime Cost

Annual OT cost = Total estimated OT hours × (regular rate × 1.5)

5. Model Comp Time vs. Cash Overtime

• If using comp time: Reserve a liability account on balance sheet; budget for accrued liability growth and annual/separation payout
• If using cash overtime: Budget as annual payroll expense

6. Apply Benefits Multiplier Overtime hours are subject to Medicare (1.45% ER), workers' compensation, and potentially pension contributions (depending on state system). Add 5-12% to the base OT cost.

True overtime cost = OT hours × OT rate × (1 + benefits multiplier)
Example: 200 OT hours × $35/hour × 1.08 = $7,560

Frequently Asked Questions

Are all public-school teachers exempt from overtime?

Yes, in most cases. Public-school teachers are exempt under the professional exemption (a 4-year degree in a field of learning, salary threshold notwithstanding). However, substitute teachers, paraprofessionals, teaching assistants, and administrative staff are non-exempt and must be paid overtime or provided comp time. Some states have additional rules; consult your state department of education.

If we have a CBA that says "no overtime," is that legal?

No. The FLSA cannot be waived by contract. Even if a CBA does not mention overtime, the FLSA applies. The CBA can specify how overtime is paid (cash vs. comp time, which employees are eligible), but not that overtime does not apply. An employer that relies on a "no overtime" CBA clause and underpays overtime is exposed to back-pay liability.

Can we require employees to use comp time if they request cash overtime?

Only if your written comp-time policy (or CBA) clearly states that comp time is the default and provided it complies with all five requirements above. However, once an employee requests to use accrued comp time, you cannot deny that request except for legitimate operational need. Many employers have policies allowing employees to choose cash OR comp time for overtime earned going forward.

What happens if we go bankrupt? Do we owe comp time?

Yes. Accrued comp time is a vested obligation and ranks as a wage claim (high priority) in bankruptcy. Courts have consistently held that accrued comp time must be paid out at fair market value. Budget for this contingency.

Do volunteers or student interns count toward the 40-hour threshold?

No. Volunteers are not covered by the FLSA. Students in genuine educational internships (internship credit, non-displaced work, limited hours) may be exempt, but this is narrow. Any volunteer or intern receiving cash compensation or performing essential work is treated as an employee. Many public entities have been burned by misclassifying positions as "volunteer" when they are actually employment.

How do we handle overtime for employees on leave (vacation, sick)?

Leave time (vacation, sick, holiday) is not "hours worked" under the FLSA. An employee who takes vacation one week and works 50 hours the next week owes 10 hours of overtime in the second week — the vacation hours do not reduce the 40-hour threshold. However, some states (like California) have stricter rules on this point. Always verify state law.

If we switch from cash overtime to comp time mid-contract, what happens to prior accruals?

Accrued comp time cannot be eliminated or reduced by policy change. Employees have a vested right to accrued balances. If you switch from cash to comp time, all prior accrued comp time must be paid out at termination or per your payout schedule. Going forward, new overtime can be accrued as comp time (if policy and CBA permit).

Key Takeaways

• The salary threshold for exempt status is $35,568/year (as of early 2025) and increases to $43,888/year on July 1, 2025. Any position earning below this threshold is presumed non-exempt unless it qualifies under a specific FLSA exemption (executive, administrative, professional). Verify your classifications annually.

• Public-sector comp time is a powerful cash-flow tool, but only if compliant with all five FLSA requirements. Non-compliant comp time (excessive accrual, denial of use, no written agreement) triggers back-pay liability. Comp time is a deferred cost, not free cost; reserve a balance-sheet liability and budget for annual payouts.

• Overtime rate includes all remuneration except time off, benefits, and reimbursements. Shift differentials, stipends, and longevity bonuses must be included in the regular rate. Missing these boosts your overtime costs by 5-15% and creates undercompensation liability if miscalculated.

• Step advancement and salary schedule increases change the overtime rate mid-year. Budget for increased overtime costs when employees advance steps or the salary schedule increases. Many organizations underestimate overtime cost growth by ignoring this factor.

• State law may impose stricter overtime rules than the FLSA. California (daily + weekly OT), New York (comp time use restrictions), and Illinois (annual payout clauses in CBAs) all have rules beyond federal baseline. Consult state labor department guidance and legal counsel.

How CollBar Can Help

Accurate FLSA compliance modeling is non-negotiable. CollBar's labor costing services include FLSA classification audits, overtime projection, and comp-time liability accounting integrated into your multi-year budget models. Our team can also model scenario comparisons showing the cash-flow and balance-sheet impact of cash overtime vs. comp time strategies, helping you understand the true cost trade-offs.

Whether you're negotiating a new CBA, launching an overtime audit, or projecting 5-year labor costs, CollBar's data-driven approach ensures compliance while optimizing your labor budget.

Ready to audit your FLSA compliance or model overtime costs? Call CollBar today at (419) 350-8420 to schedule a free 30-minute strategy session with one of our labor-cost specialists. We'll review your current practices, identify compliance gaps, and show you how to integrate FLSA requirements into your budget forecasts with confidence.