Note: This article is for general informational and editorial purposes only. It is not legal advice.
The phrase “undue hardship” sounds like something a tired office manager might mutter while staring at the printer jammed for the third time before lunch. But in U.S. employment law, those two words carry serious weight. They decide whether an employer must adjust schedules, uniforms, duties, grooming policies, prayer breaks, or other workplace rules to accommodate an employee’s sincerely held religious beliefs.
For nearly five decades, many courts treated “undue hardship” in religious accommodation cases as a relatively low bar for employers. If the accommodation created more than a tiny, minimal, or “de minimis” cost, the employer could often say no. Then came the U.S. Supreme Court’s 2023 decision in Groff v. DeJoy, a case involving a postal worker who wanted Sundays off for Sabbath observance. The Court did not erase the old rule with a giant legal broom, but it did tell everyone that the rule had been read too lightly for too long.
Today, employers must show that a requested religious accommodation would cause substantial increased costs in relation to the conduct of their particular business. That shift is not just a technical footnote for lawyers. It changes how HR teams document decisions, how managers handle religious requests, and how employees understand their rights under Title VII of the Civil Rights Act of 1964.
What Religious Accommodation Means Under Title VII
Title VII prohibits employment discrimination based on religion, among other protected characteristics. But religion is different from many other protected categories because it often involves practices that may conflict with work rules. An employee may need time off for Sabbath observance, a modified dress code for religious clothing, permission to wear a beard, a short prayer break, or an exemption from a workplace requirement that conflicts with a sincerely held belief.
Title VII defines religion broadly. It includes religious observance, practice, and belief. The law requires employers to reasonably accommodate an employee’s religious practice unless doing so would create an undue hardship on the conduct of the employer’s business.
That sounds simple until real life walks into the conference room carrying a scheduling spreadsheet, a union seniority agreement, three open shifts, and a manager who just wants everyone to stop emailing “quick question.” The law asks employers to do more than shrug. They must assess the request, consider possible accommodations, and determine whether the burden is truly undue.
The Starting Point: Before Hardison
When Congress amended Title VII in 1972 to include specific religious accommodation language, it created a legal duty but did not provide a detailed formula. Employers knew they had to reasonably accommodate religious practices, but the statute did not define exactly how much burden was too much.
That uncertainty mattered. A national airline, a hospital, a small restaurant, and a public school all face different operational pressures. A schedule change that is easy in one workplace may be extremely difficult in another. Courts needed a way to interpret “undue hardship,” and the Supreme Court eventually stepped in.
Trans World Airlines v. Hardison: The “De Minimis” Era Begins
The 1977 case Trans World Airlines, Inc. v. Hardison became the landmark decision on religious accommodation for decades. Larry Hardison, an employee at TWA, observed a Saturday Sabbath and sought scheduling changes so he would not have to work during that period. The case involved a union seniority system, staffing needs, and the employer’s obligation to keep operations running.
The Supreme Court ruled for TWA. The decision emphasized that Title VII did not require the employer to violate a bona fide seniority system or bear certain additional costs to accommodate the employee. One sentence from the opinion became famous: requiring an employer to bear more than a de minimis cost to provide an accommodation would be an undue hardship.
That line became the engine of religious accommodation law for many courts. Over time, “more than de minimis” was treated as the standard. In plain English, if the accommodation cost more than a tiny amount or created more than a minor inconvenience, employers often had a strong defense.
Why the Hardison Standard Was Controversial
The controversy was not just academic. Critics argued that the “de minimis” approach made Title VII’s accommodation duty surprisingly weak. After all, “undue hardship” sounds like a serious burden. “More than minimal cost” sounds like buying slightly nicer coffee for the break room. Those are not the same thing.
Employees and religious liberty advocates argued that the low standard allowed employers to reject accommodations too easily. Employers, meanwhile, relied on decades of case law and built HR policies around the idea that they did not have to absorb anything more than a minimal burden.
The Road to Groff v. DeJoy
Groff v. DeJoy began with a familiar workplace conflict: scheduling. Gerald Groff, a rural postal carrier and evangelical Christian, believed he should not work on Sundays. For a time, the U.S. Postal Service tried to accommodate him. But Sunday delivery became more important after USPS contracted to deliver packages for Amazon, and local staffing challenges made the issue harder.
When Groff missed Sunday shifts, other employees had to cover the work. The workplace experienced strain. Groff eventually resigned and sued, arguing that USPS failed to accommodate his religious practice under Title VII.
Lower courts applied the traditional reading of Hardison and sided with USPS. But the Supreme Court agreed to hear the case, giving it a chance to clarify what “undue hardship” really means.
What SCOTUS Changed in Groff v. DeJoy
In 2023, the Supreme Court issued a unanimous decision in Groff v. DeJoy. The Court did not fully overrule Hardison. Instead, it said many courts had misunderstood or oversimplified Hardison by treating the “more than de minimis” phrase as the controlling test.
The Court explained that “undue hardship” requires more than a minor burden. Employers must show that the accommodation would result in substantial increased costs in relation to the conduct of their particular business.
This was a major correction. It moved the legal standard away from “any meaningful inconvenience” and toward a more serious, fact-specific inquiry. The employer must look at the actual accommodation, the actual workplace, the size and nature of the business, operating costs, practical effects, and whether alternatives exist.
What Groff Did Not Do
It is equally important to understand what Groff did not do. The Court did not say employers must grant every religious accommodation request. It did not import the Americans with Disabilities Act standard word for word. It did not say coworkers’ burdens are always irrelevant. It did not create a magic phrase that automatically wins a case for either side.
Instead, Groff requires a more careful analysis. Employers can still deny accommodations that impose substantial operational costs, serious staffing problems, legal risks, safety concerns, or major disruptions. But they need evidence, not vibes. “This seems annoying” is not a legal strategy. It is a group chat message.
De Minimis vs. Substantial Increased Costs
The difference between the old and new approach is easier to see with examples.
Under the older “de minimis” reading, an employer might deny a request because it caused minor overtime, small administrative burdens, or coworker complaints. After Groff, those facts may still matter, but they are not automatically enough. The employer must show that the burden is substantial in the overall context of the business.
For a large national company, covering one shift might not be substantial. For a tiny emergency clinic with only two qualified workers on duty, the same shift change could be much more serious. That is why context is now the star of the show. And yes, context finally got its leading role after years of being treated like a background extra.
How Groff Affects Employers
Employers now need stronger documentation when evaluating religious accommodation requests. A denial should not rest on general statements such as “too disruptive,” “not fair,” or “we have always done it this way.” Those phrases are the legal equivalent of bringing a pool noodle to a sword fight.
Instead, employers should identify the specific accommodation requested, explore alternatives, calculate costs where possible, examine staffing effects, review safety or compliance issues, and document the practical impact on business operations.
Practical Employer Steps After Groff
Employers should update handbooks, train supervisors, and revise accommodation forms. Managers should know that religious requests do not always arrive with perfect legal wording. An employee does not have to say, “I hereby invoke Title VII.” They might simply say, “I cannot work that day because of my faith,” or “My religion requires me to dress this way.” That should trigger a thoughtful process.
HR teams should also avoid assuming that coworker resentment equals undue hardship. Coworker impact can matter when it affects the business, such as by creating serious operational strain or compromising safety. But discomfort, bias, or mere annoyance from coworkers is not enough.
How Groff Affects Employees
For employees, Groff strengthens the right to seek religious accommodation. It does not guarantee the preferred accommodation, but it makes it harder for an employer to dismiss a request based on minimal inconvenience.
Employees should explain the religious conflict clearly, request a reasonable accommodation, and remain open to alternatives. For example, if an employee cannot work on a Sabbath, possible accommodations may include shift swaps, flexible scheduling, voluntary coverage, modified duties, or transfer to a different schedule if available.
The strongest requests are specific, respectful, and practical. “My religion prevents me from working Sundays, and I am willing to swap shifts or work additional hours on other days” is much more useful than “Fix this immediately, or I shall unleash the legal kraken.” The kraken may be dramatic, but HR prefers documentation.
Common Religious Accommodation Examples
Schedule Changes
Schedule changes are among the most common religious accommodation requests. Employees may ask for Sabbath observance, time off for religious holidays, modified start times, or permission to attend religious services. After Groff, employers must examine whether the requested change creates a substantial burden, not merely whether it causes inconvenience.
Dress and Grooming Policies
Religious dress and grooming accommodations may include head coverings, beards, modest clothing, religious jewelry, or other faith-based appearance practices. Employers can still enforce safety rules, but they should consider whether alternatives exist, such as modified protective equipment or role-specific adjustments.
Prayer Breaks
Short prayer breaks may be reasonable in many workplaces, especially if they can fit within existing break policies. However, in highly time-sensitive environments, such as emergency response or production lines, employers may need to evaluate coverage and operational impact carefully.
Conflicts With Specific Job Duties
Some requests involve avoiding specific tasks that conflict with religious beliefs. These cases can be more complex, especially when the duty is central to the job or affects customers, patients, students, or coworkers. Employers should analyze whether reassignment, task swaps, or other options are feasible without substantial harm to business operations or legal obligations.
Specific Example: The Post-Groff Scheduling Problem
Imagine a delivery company with 500 employees in one region. One employee requests Sundays off for religious observance. If the employer can use voluntary shift swaps, adjust routes, or spread coverage without major cost, denying the request may be difficult after Groff.
Now imagine a remote facility with four employees, strict licensing requirements, and no available substitute workers within 100 miles. If one employee’s absence every Sunday forces the employer to shut down services, pay repeated premium overtime, or violate safety rules, the employer may have a stronger undue hardship argument.
The key question is not whether the request creates some burden. Most accommodations do. The question is whether the burden is substantial in relation to that employer’s business.
The Role of Coworker Burdens
One of the most important parts of Groff is how it treats coworker impact. Employers cannot deny an accommodation simply because coworkers dislike it. Religious accommodation would be nearly meaningless if it disappeared the moment someone rolled their eyes in the break room.
However, coworker effects can matter when they affect the business itself. If an accommodation repeatedly forces other employees into mandatory overtime, damages morale in a way that harms operations, creates safety risks, or prevents essential work from being performed, those facts may support an undue hardship defense.
The line can be delicate. Employers must separate genuine business impact from bias, inconvenience, or ordinary workplace grumbling. In other words, “people are annoyed” is weak. “We cannot safely staff the neonatal unit” is different.
Why Documentation Matters More Than Ever
After Groff, documentation is not paperwork for paperwork’s sake. It is the record that shows whether the employer actually considered the request. A strong file may include the employee’s request, the religious conflict, accommodations discussed, alternatives offered, cost estimates, staffing data, safety concerns, and the final decision.
Employers should also document why a proposed alternative works or does not work. If the requested accommodation is denied, the employer should show that it considered other reasonable options. Courts are likely to look closely at whether the employer engaged in a meaningful process rather than jumping straight to “no.”
How the Standard May Continue to Evolve
Groff answered a major question, but it did not answer every question. Future cases will continue to define what counts as substantial increased cost. Courts will likely examine different industries, workplace sizes, safety-sensitive roles, public-facing positions, and conflicts involving third-party rights.
Public schools, healthcare settings, transportation companies, retail employers, government agencies, and small businesses may all face different outcomes because the analysis is so context-dependent. That can be frustrating for anyone who wants a one-sentence rule. But law, like office coffee, is often stronger and messier than expected.
Experience-Based Insights: What This Evolution Feels Like in Real Workplaces
In practical workplace life, the evolution of undue hardship feels less like a dramatic courtroom thunderclap and more like a slow change in how conversations happen. Before Groff, some managers treated religious accommodation requests as unusual exceptions. If the request affected scheduling, coverage, uniforms, or customer-facing duties, the first reaction was often defensive: “We can’t do that,” followed by a quick mention of fairness or disruption.
After Groff, the better approach is slower, calmer, and more evidence-based. Good HR teams now pause before answering. They ask what the employee needs, what religious conflict exists, what alternatives might work, and what the actual business burden would be. This does not mean every request gets approved. It means the decision-making process becomes more disciplined.
One common experience involves scheduling. A manager may initially believe that giving one employee a certain day off will create chaos. But once HR reviews the schedule, they may find that voluntary shift swaps, rotating coverage, or minor adjustments solve the issue. In that situation, the accommodation may be easier than expected. The monster under the bed turns out to be a laundry basket.
In other workplaces, the burden is real. A small business with limited staff may struggle to cover recurring absences. A hospital unit may need specific credentials on every shift. A security-sensitive job may require continuous coverage. In those cases, the employer’s experience is not about rejecting religion; it is about keeping the operation safe and functional. The post-Groff difference is that the employer must show the burden with facts rather than assumptions.
Employees also experience the change. Some may feel more confident raising religious conflicts because the law now clearly rejects the idea that tiny burdens automatically defeat accommodation. But employees still need to communicate clearly. A vague request can create confusion. A cooperative tone can help both sides find a workable solution.
The most successful accommodation conversations tend to share a few traits: respect, curiosity, documentation, and creativity. The employee explains the belief-based conflict. The employer asks practical questions without judging the belief. Both sides explore options. Nobody treats the process like a cage match.
Another real-world lesson is that consistency matters. If an employer bends scheduling rules for childcare, school, sports, or personal preferences but refuses to consider religious needs, that inconsistency can create legal risk. Similarly, if an employer grants one religious accommodation but denies another without explaining the business difference, the decision may look arbitrary.
The evolution of undue hardship is ultimately a workplace culture test. It asks whether employers can balance operational needs with respect for religious practice. It asks whether employees can raise sincere conflicts without turning every disagreement into a battle. And it reminds everyone that accommodation law is not about special treatment for fun. It is about making room, when reasonably possible, for people to work without abandoning core religious commitments at the door.
Conclusion: The New Meaning of Undue Hardship
The evolution of undue hardship in SCOTUS religious accommodation law is a story of one phrase gaining sharper meaning over time. Hardison gave employers a standard that many courts interpreted as lenient. Groff corrected that path by making clear that undue hardship means more than a minimal cost. Employers must now show a substantial burden in the real context of their business.
For employers, the message is clear: update policies, train managers, document decisions, and avoid reflexive denials. For employees, the message is equally important: religious accommodation rights are stronger, but cooperation and clarity still matter.
The best workplaces will not treat Groff as a legal headache. They will treat it as a reminder that people bring deeply held beliefs to work, and good management requires more than schedules and spreadsheets. It requires judgment, fairness, and sometimes the humility to admit that “we’ve always done it this way” is not a business necessity. It is just a habit wearing a tiny manager badge.
