Equal Pay Cases in NJ When Part‑Time and Full‑Time Employees Do the Same Work

It is common in New Jersey for workplaces to rely on a mix of full-time and part-time staff. A school district may have full-time teachers and part-time specialists. A hospital may use part-time nurses or technicians to cover evenings. A company may bring in part-time professionals to handle seasonal surges.

What is not supposed to be common is this: two people doing essentially the same job, but because one is part-time — often a woman, a caregiver, or an older worker — that person is paid less per hour or given weaker benefits without a good, lawful reason.

This post looks at how the state and federal laws apply when employees do the same work, what “substantially similar” really means, which differences may be lawful, and how an equal pay act lawyer in New Jersey can help if your part-time status is being used as a cover for discrimination.

The Legal Framework of Equal Pay for Part-Time and Full-Time Workers in New Jersey

New Jersey’s protections rest on both federal and state laws — but state law often goes further, offering broader and stronger safeguards. Together, these laws aim to eliminate wage disparities tied to protected characteristics such as gender, race, age, and more. While none of these statutes explicitly say that part-time and full-time workers must always earn the same rate, they create a strong legal foundation for challenging wage gaps that unfairly impact certain protected groups.

At the federal level, the Equal Pay Act of 1963 (EPA) requires employers to compensate men and women equally when they perform substantially equal work in the same workplace. Wage differences are only lawful if they are based on:

• A seniority system
• A merit system
• A production-based system
• Any other factor other than sex

This law specifically targets sex-based wage discrimination and sets a clear standard for evaluating pay discrepancies.

Locally, the New Jersey Law Against Discrimination (NJLAD) prohibits discrimination in pay and other employment terms based on a long list of protected traits, including race, sex, gender identity, disability, sexual orientation, age, and more. While NJLAD does not contain a standalone equal pay section, wage discrimination based on any protected characteristic is illegal under its broad mandate.

This standard applies across job titles, across departments, and across both temporary and permanent roles, so long as the work performed is substantially similar.

In 2018, the Legislature added a powerful provision — commonly called the Diane B. Allen Equal Pay Act. Under that subsection, it is an unlawful employment practice for an employer to: 

• Pay any employee who is a member of a protected class at a rate of compensation, including benefits, which is less than that paid to employees who are not members of that protected class for substantially similar work, when viewed as a composite of skill, effort and responsibility, and performed under similar working conditions.

Key points about New Jersey’s Equal Pay Act:

• It covers all NJLAD protected classes, not only sex
• It looks at “substantially similar work” — not identical jobs or titles.
• It covers compensation and benefits (wages, bonuses, overtime, commissions, benefits, and more)
• Wage comparisons are made across all of an employer’s operations or facilities, not just within one location

The New Jersey Division on Civil Rights (DCR) — the agency that enforces NJLAD and the Equal Pay Act — has issued detailed guidance explaining how it interprets these rules, including what counts as “substantially similar work” and which differences can be justified. 

Federal law sets the foundation, but the state’s protections go even further. The broader standard makes it far more difficult for employers to justify paying someone less simply because they work fewer hours: a key point to discuss with an experienced equal pay act attorney in New Jersey to see if you have a possible claim.

When Pay Differences Between Employees Are Legal Under NJ Law

Not every wage difference between part-time and full-time workers violates the law. Employers can apply different rates if the reasons are legitimate, applied consistently, and unrelated to any protected characteristic.

A common lawful justification is the value of benefits. Full-time workers often receive health insurance, retirement benefits, paid travel time for certain roles, and other perks that part-time workers do not. Employers sometimes structure pay to reflect that difference. If the employer can show — with consistency — that the higher hourly wage ties to the overall value of a full-time benefits package, the practice may be lawful.

Differences in job duties can also justify the gaps. A full-time worker may:

• Supervise others
• Open or close the workplace
• Handle escalated customer issues
• Take on higher-level responsibilities

If those additional duties are real, documented, and consistently assigned only to full-time employees, they may support a lawful pay difference.

Experience and seniority are also legitimate factors. Longer tenure or greater expertise can justify higher compensation — but only if applied evenly. A part-time employee with more experience should not be paid less than a new full-time hire simply because of their schedule. Inconsistency often signals discriminatory intent.

The same is true for merit increases. Merit-based systems must be grounded in objective, job-related criteria. When performance raises consistently favor one group — such as full-time men over part-time women, or younger employees over older ones — despite comparable work and evaluations, the disparity may suggest unlawful bias rather than legitimate performance-based distinctions.

Part-time status itself is not listed as a bona fide factor. Employers can, of course, design roles with genuinely different expectations, but “part-time” is often simply a reflection of hours, not a change in the nature of the work. If only certain protected groups are steered into lower-paid daytime roles or denied access to higher-paid schedules — or if night-shift hourly rate is reduced in a way that disproportionately affects a protected class — the practice may cross into unlawful bias.

When Pay Differences In New Jersey Cross the Line Into Discrimination

This is where New Jersey law becomes especially important for workers. A wage gap between part-time and full-time employees becomes illegal when it’s based not on legitimate business reasons, but on discrimination tied to a protected characteristic. Under the Diane B. Allen Equal Pay Act, employers must prove that any difference is backed up by specific, job-related factors.

Yet even with these strong protections in place, wage gaps remain a significant problem in New Jersey. In 2023, women working full-time earned a median of $1,168 per week — only about 78% of the $1,497 earned by men. That number represents a decline from roughly 83.5% the year before, underscoring the real-world challenges.

Sometimes biasis subtle. A policy may look neutral on paper but disproportionately harm certain groups in practice. This is common in part-time work, where women — especially women of color — make up a large share of the workforce. 

If a company pays employees less for the same job, and that policy disproportionately affects women, the disparity may qualify as unlawful even if gender is never mentioned. The employer must then show that the wage gap is based on a factor other than sex, is job-related, and is consistent with business necessity.

Discrimination can also arise from uneven enforcement of workplace policies. For example, if a business claims to have a uniform scale but quietly pays male part-time workers closer to full-time rates while keeping female part-time workers at the bottom of the scale, that inconsistency can serve as evidence of intent. Likewise, if employers use part-time status to sideline pregnant workers, caregivers, older employees, or other protected groups, those practices may violate New Jersey law.

Another warning sign is different pay across departments. If employees receive different rates depending on which team, manager, or location they report to, the employer may struggle to justify the difference. 

The Act’s “substantially similar work” standard is critical. Employers cannot evade law’s requirements by giving part-time employees slightly different job titles or tweaking duties if the core responsibilities remain the same. 

For instance, if a “Part-Time Sales Associate” performs the same essential tasks as a “Full-Time Sales Consultant,” the jobs are likely substantially similar — meaning both workers should be paid equally unless the employer can prove otherwise.

In other words:

• A part-time employee is not automatically a “different” comparator than a full-time employee.
• If the part-time and full-time employee are doing substantially similar work, their hourly rate and access to compensation cannot be lower for the protected-class worker without a valid defense.

Total annual pay will be different — that is simply because one person works fewer hours. But the rate of compensation is where the law looks closely.

What “Substantially Similar Work” Means When Hours Differ

In New Jersey, “substantially similar work” is not defined by the statute word-for-word, but DCR guidance describes it as: work that is, when viewed as a composite, substantially similar in terms of skill, effort and responsibility, and performed under similar working conditions.

Applied to part-time versus full-time roles, that means asking questions such as:

• Do both employees perform the same core tasks?
• Are they expected to exercise similar judgment or decision-making?
• Do they deal with the same level of physical or mental effort?
• Are they accountable for similar responsibilities, even if one does them fewer hours per week?
• Are they working in the same environment, with similar risks, conditions, and client expectations?

If the answer is “yes,” then the part-time and full-time employees are very likely performing substantially similar work — and New Jersey’s rules apply.

Examples:

• A full-time nurse and a part-time nurse on the same hospital unit, with similar patient assignments during their shifts.
• A full-time customer service representative and a part-time representative answering the same support lines and using the same scripts.
• A full-time staff accountant and a part-time staff accountant working on the same types of reconciliations and reports.

The fact that one person works 40 hours per week and the other works 20 does not, by itself, make the work different.

Why Documentation Is Critical in New Jersey's Equal Pay Claims

Although this post does not include a separate discussion of “what evidence moves cases,” documentation is unquestionably the backbone of any successful wage discrimination claim. To prove that a gap is biased — and not tied to a legitimate business reason — you’ll need records that show what you were paid, what work you performed, and how that compares to others doing substantially similar work.

Start by gathering all documents that show your pay. If you can legally access information about what your coworkers earn, preserve that too. Document your job duties in detail. Keep your job description, performance reviews, and any written communications outlining what you do day-to-day.

You could also create a record of any discussions you have with HR or management about your compensation. After verbal conversations, send an email summarizing what was said — this creates a reliable, timestamped paper trail.

Finally, document anything that suggests broader unfair treatment tied to your part-time status or a protected characteristic. Being passed over for advancement, excluded from meetings, or denied training opportunities may help establish a pattern of discrimination, not a one-time incident.

Strong documentation will support your claim: it often determines if a case succeeds or fails.

The Economic and Personal Impact of Pay Disparities

Unequal pay does more than reduce a paycheck: it affects a worker’s financial stability, emotional health, and long-term opportunities.

Financially, even a small hourly difference adds up quickly, especially in a high-cost state like New Jersey. For part-time workers who already earn less due to reduced hours, being paid a lower rate can make it difficult to cover basic expenses such as rent, transportation, and groceries. Over months and years, the cumulative loss can amount to thousands of dollars, affecting a person’s ability to save, invest, or plan for retirement.

The psychological toll can be equally serious. Learning that you earn less than coworkers doing the same work is discouraging and can leave you feeling undervalued or disrespected. 

This kind of wage inequity chips away at morale, trust, and overall job satisfaction — and, over time, can harm confidence and mental health.

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