Equal Pay and Pay Discrimination in Colorado

Colorado employees who are being paid less than coworkers for substantially similar work, because of their sex, race, national origin, or another protected characteristic, may have claims under the Colorado Equal Pay for Equal Work Act (EPEWA), the federal Equal Pay Act of 1963, and the Colorado Anti-Discrimination Act (CADA). Understanding which statute applies, what evidence matters, and how the filing deadlines work is essential before taking action. An equal pay attorney in Colorado can help evaluate the strength of a claim, identify the right legal framework, and pursue available remedies before the applicable deadline closes.

At Elkus & Sisson, P.C., our Colorado employment law attorneys represent employees who are experiencing unequal pay tied to a protected characteristic. We evaluate claims under both state and federal law, advise on the applicable filing deadlines, and pursue available remedies through administrative and judicial channels.

What Is Equal Pay Discrimination in Colorado?

Equal pay discrimination occurs when an employer pays an employee less than a comparator for substantially similar work, and the disparity is tied to a protected characteristic. Under the EPEWA, the relevant characteristic is sex. Under the Colorado Anti-Discrimination Act (CADA), C.R.S. § 24-34-402^[2], and Title VII of the Civil Rights Act, 42 U.S.C. § 2000e^[3], protected characteristics include race, color, religion, national origin, sex, and disability. An employee can pursue claims under multiple statutes simultaneously when the facts support it.

“Substantially similar work” under the EPEWA is evaluated by skill, effort, and responsibility performed under similar working conditions, not by job title. An employer cannot pay a female supervisor less than a male supervisor doing the same work by assigning them different titles.

The EPEWA applies to all Colorado employers regardless of size. CADA applies to employers with one or more employees. Title VII applies to employers with 15 or more employees. The statute that applies shapes which agency receives the charge, which deadline governs, and what remedies are available.

Colorado’s Equal Pay for Equal Work Act

Colorado’s Equal Pay for Equal Work Act (EPEWA), C.R.S. §§ 8-5-101 et seq.^[1], is among the more expansive state equal pay frameworks in the country. It prohibits employers from paying employees of different sexes a different wage rate for substantially similar work, and it imposes transparency obligations that go beyond the wage comparison itself. The law was strengthened through amendments in 2021 and further expanded in 2023, including updated pay transparency obligations that apply broadly to Colorado employers.

Salary History Ban

Colorado employers cannot ask job applicants about their prior salary history or use that history to set a new employee’s pay. This provision directly targets one mechanism through which historical pay disparities compound: an employer who bases new pay on prior pay inherits the discrimination embedded in the applicant’s prior compensation.

Pay Transparency Requirements

The EPEWA requires employers to disclose the hourly or salary range and a general description of any benefits or other compensation in every job posting. This applies to employers with at least one employee and covers remote postings even when the employer is not headquartered in Colorado. Employers who omit pay range information from job postings can face civil penalties under the EPEWA, and the CDLE investigates pay transparency complaints separately from wage discrimination claims.

Pay Secrecy Prohibition

Employers may not adopt or enforce policies that prevent employees from discussing or disclosing their own wages or the wages of other employees they are aware of. A pay secrecy policy is itself a violation of the EPEWA. The right to discuss wages is foundational to identifying pay disparities: without it, employees have no practical way to know they are being paid less.

Record-Keeping Obligations

Employers must maintain job descriptions and wage and salary records for each employee throughout employment and for two years after separation. These records are critical evidence in any equal pay dispute and are discoverable in litigation or administrative proceedings.

Pay Discrimination Based on Race and Other Protected Classes

The EPEWA covers sex-based pay disparities. Colorado employees also have protections against pay discrimination based on race, national origin, disability, age, and other characteristics under CADA, Title VII, the Americans with Disabilities Act (ADA), 42 U.S.C. § 12101^[4], and the Age Discrimination in Employment Act (ADEA), 29 U.S.C. § 621^[5]. Pay discrimination under CADA and Title VII is evaluated as disparate treatment: the employee must show the employer paid them less because of a protected characteristic. 

Understanding the full scope of Colorado workplace discrimination laws is important because pay-based claims often arise alongside other forms of discriminatory treatment, including unequal promotion opportunities, job assignment, and performance evaluation. The wage gap discrimination experienced by minority workers in Colorado can implicate multiple statutes simultaneously, and claims are typically pursued in parallel when the facts support it.

Unlike the EPEWA, which shifts the burden to the employer once a pay differential between comparators is established, CADA and Title VII claims typically require showing that the employer’s stated reason for the pay difference is a pretext for discrimination. These two frameworks operate in parallel, and the strongest approach often involves pursuing both where the evidence supports it.

How Employers Defend Equal Pay Claims

Understanding the defences an employer is likely to raise is part of evaluating a claim before filing. Under both the EPEWA and the federal Equal Pay Act, an employer can justify a pay differential by establishing one of four exceptions.

• Seniority system. A longer-tenured employee may be paid more if the seniority system is applied consistently and not used as a proxy for protected characteristics.
• Merit system. Pay differences tied to a documented and consistently applied performance review system may be permissible. The system must be in writing and applied across employees in the same role.
• System measuring earnings by production or quality. Pay differentials based on output, revenue, sales volume, or quality metrics may be permissible where the measurement system is objective and uniformly applied.
• Factor other than sex (OFOS) or other protected class. This catchall allows pay differentials based on factors unrelated to the protected characteristic, such as a specific certification, geographic market differential, or competitive starting offer. Under the EPEWA, the employer must show the factor is genuinely job-related, accounts for the entire differential, and did not originate from a discriminatory pay practice.

When an employer raises an OFOS defence based on a prior salary or a negotiated starting wage, Colorado’s salary history ban may undercut that defence if the differential traces back to a salary history inquiry. This intersection between OFOS and the salary history prohibition is one of the more litigated areas under the EPEWA.

How to Identify a Valid Comparator

The core factual question in most equal pay cases is whether a valid comparator exists: a coworker paid more for substantially similar work. Identifying that comparator is a practical exercise before filing.

• Job duties, not job title. The comparison focuses on what employees actually do. A company cannot defeat an equal pay claim by assigning different titles to employees who perform the same tasks.
• Substantially similar, not identical. The work does not need to be a perfect match. The analysis looks at composite skill, effort, and responsibility. Minor differences in duties do not defeat a comparison where the overall work is substantially similar.
• Same or similar working conditions. This generally refers to the physical environment and workplace hazards, not shift schedule or location. Remote-versus-in-office distinctions are evaluated case by case under recent EPEWA guidance.
• Wage information employees can access. Under the EPEWA, employees have a protected right to discuss wages with coworkers. Employers cannot retaliate for wage discussions. Employees may also request salary range information for their own position and any position they apply to. In litigation, internal compensation records are discoverable.

Filing Deadlines for Equal Pay Claims in Colorado

Missing a filing deadline permanently bars an equal pay or pay discrimination claim. The applicable deadline depends on which statute governs the claim.

• EEOC / CCRD charge (Title VII, CADA, ADA, ADEA): 300 days. Colorado is a deferral state. Employees filing discrimination-based pay claims under Title VII, CADA, or the ADA have 300 days from the discriminatory pay decision to file a charge with the Equal Employment Opportunity Commission (EEOC) or the Colorado Civil Rights Division (CCRD). Filing a charge is a legal prerequisite to bringing a federal lawsuit under those statutes. Missing the 300-day window closes the administrative pathway permanently.
• Federal Equal Pay Act (29 U.S.C. § 206(d)): 2 years; 3 years for willful violations.^[6] Equal Pay Act claims do not require an EEOC charge before filing suit. The limitations period runs from the most recent discriminatory paycheck, not from when the employee first learned of the disparity. Each new paycheck reflecting a discriminatory wage rate is a separate violation, which can extend the period of recoverable back pay.
• Colorado Equal Pay for Equal Work Act / Colorado Wage Act (C.R.S. §§ 8-4-101 et seq.): Wage payment provisions that intersect with the EPEWA may also be subject to the Colorado Wage Act^[7] two-year statute of limitations (three years for willful violations). The CDLE handles pay transparency complaints under a separate administrative process.

Because multiple deadlines may run simultaneously, consulting a Colorado equal pay attorney as early as possible after identifying a potential disparity is important. Delay can limit recovery even when the underlying claim remains valid.

What the Pay Gap Evidence Often Looks Like

Most employees arrive at this question with partial information: some pay data, some comparator context, and real uncertainty about which statute applies to their specific situation.

• The pay gap alone does not define the claim. A disparity is unlawful only when it is tied to a protected characteristic and the employer cannot justify it under a statutory exception. Employers frequently overstate seniority, merit, and OFOS defences. Identifying whether those defences hold is where the legal analysis begins.
• Documentation is what converts a disparity into a provable legal theory. Pay stubs, offer letters, job descriptions, and records of compensation conversations form the evidentiary foundation. Wage discussions with coworkers are legally protected and can surface the comparator evidence a claim requires.
• The timing of the pay decision often matters as much as the gap itself. When was the rate set? Was a salary history inquiry involved, now prohibited under Colorado law? A recent reclassification or promotion that widened the gap may be more actionable than a longstanding differential.
• Choosing the right statute is a strategic decision. The EPEWA has a lower evidentiary burden and covers sex-based pay disparities only. CADA and Title VII reach race, national origin, and disability but require showing discriminatory intent. The statute chosen shapes the filing deadline and available damages.
• Filing an EEOC or CCRD charge is not the same as filing a lawsuit. The charge initiates an investigation and preserves the right to sue. Many pay discrimination cases resolve at the administrative stage or after a right-to-sue letter is issued. Consulting a pay discrimination attorney early keeps every option open.

Acting before the shortest applicable deadline is what gives the evidence its weight. A valid claim with strong documentation is only actionable if the filing window remains open when the employee decides to act.

Understand Your Full Legal Options

Equal pay and pay discrimination claims involve overlapping statutes with different deadlines, different filing agencies, and different remedies depending on the protected characteristic at issue. Matching the facts to the right legal framework is the essential first step. Elkus & Sisson, P.C. represents employees at our Colorado office locations in employment law matters including equal pay claims, pay discrimination, and wage and hour disputes.

If you have questions about unequal pay or pay discrimination in Colorado, contact us or call +1 303-567-7981 to schedule a consultation.