Can you be fired for being sick in Colorado? Usually yes, because Colorado is an at-will employment state and a routine sick day is not, by itself, a legally protected absence. But that general rule has serious exceptions. If your time off was covered by Colorado’s paid sick leave law, the state’s paid family and medical leave program, the federal Family and Medical Leave Act, or disability protections under state or federal law, firing you because of that absence is illegal. Whether you’re protected depends on the illness, how long you were out, the size of your employer, and whether you followed the right steps.
At-Will Employment and Why It Has Limits
Under Colorado’s at-will doctrine, either you or your employer can end the employment relationship at any time, for any reason or no reason. A single day missed for a common cold, with no further protection in play, can legally cost you your job.
What changes the analysis is whether the absence falls under a statute that overrides at-will. An employer who fires you specifically because you used protected sick leave, requested a disability accommodation, or filed for family and medical leave benefits has crossed a legal line even in an at-will state. The protections below run from the most broadly available to the most specialized.
Short Absences: Paid Sick Leave Under HFWA
Colorado’s Healthy Families and Workplaces Act (HFWA) is the first protection most sick workers rely on. It requires every employer in the state to provide paid sick leave to every employee, including part-time and temporary workers, and leave starts accruing from your first day on the job.1Colorado Department of Labor and Employment. INFO 6B – Paid Sick Leave Under the Healthy Families and Workplaces Act
You earn one hour of paid sick leave for every 30 hours worked, up to 48 hours per year. You can use the hours as they accrue. Employers can also choose to frontload the full 48 hours at the start of the year.2Colorado Department of Labor and Employment. INFO 6B – Rights and Obligations Under HFWA
HFWA leave covers your own illness or injury, preventive care, caring for a sick family member, situations involving domestic abuse or sexual assault, bereavement, and certain unexpected school or home closures. Firing or retaliating against you for using accrued sick leave is illegal. One important detail about documentation: your employer can only ask for a note or other proof if you’ve been out for four or more consecutive scheduled workdays, and they can’t demand it before you take the leave.2Colorado Department of Labor and Employment. INFO 6B – Rights and Obligations Under HFWA
Serious Conditions: FAMLI and FMLA
Forty-eight hours of sick leave doesn’t go far against surgery recovery, cancer treatment, or a major mental health crisis. Two separate programs are built for longer absences, and they can run together.
FAMLI (Paid)
Colorado’s Family and Medical Leave Insurance (FAMLI) program provides up to 12 weeks of paid leave per year for qualifying reasons, with an additional four weeks available for pregnancy or childbirth complications. Benefits have been available since January 1, 2024.3Colorado FAMLI. Family and Medical Leave Insurance (FAMLI) – Home
Most Colorado employees qualify after earning at least $2,500 in wages within the state during the previous five completed calendar quarters. There’s no minimum time with your current employer to receive FAMLI benefits, but job protection (the right to return to your position or an equivalent one) only applies after you’ve been with that employer for at least 180 days.4Colorado FAMLI. Individuals and Families FAQs5Colorado FAMLI. Job Protection and Retaliation
FAMLI benefits replace 90% of the first $735.67 of your average weekly wage and 50% of any amount above that, up to a maximum weekly benefit of $1,381.45 for 2025–2026.6Colorado FAMLI. Premium and Benefits Calculator FAMLI is designed for serious health conditions involving inpatient care or continuing treatment by a healthcare provider, not routine illness.7Colorado FAMLI. Health Care Providers FAQs
FMLA (Unpaid, Job-Protected)
The federal Family and Medical Leave Act (FMLA) provides up to 12 weeks of unpaid, job-protected leave per year for a serious health condition that prevents you from doing your job. FMLA matters alongside FAMLI because it offers separate job-protection rights with its own eligibility rules.8U.S. Department of Labor. FMLA Frequently Asked Questions
FMLA is narrower than FAMLI on who’s covered. You qualify only if all three of the following are true:
- Your employer has 50 or more employees within a 75-mile radius.
- You’ve worked for that employer for at least 12 months.
- You’ve logged at least 1,250 hours in the 12 months before leave starts.
If you qualify, your employer must maintain your health insurance during leave and restore you to your original or an equivalent position when you return.9U.S. Department of Labor. Fact Sheet 28P – Taking Leave When You or Your Family Member Has a Serious Health Condition Under the FMLA
FMLA defines a “serious health condition” as one involving either inpatient care (an overnight hospital stay) or continuing treatment by a healthcare provider. The common cold, seasonal flu, earaches, upset stomach, non-migraine headaches, and routine dental problems generally don’t qualify on their own. Cancer, severe back injuries, mental illness requiring ongoing treatment, and recovery from surgery typically do.10eCFR. 29 CFR 825.113 – Serious Health Condition
You don’t have to take FMLA leave in one block. When medically necessary, you can take it intermittently or on a reduced schedule, which is useful for chronic conditions like weekly chemotherapy.8U.S. Department of Labor. FMLA Frequently Asked Questions
When Illness Is a Disability
Chronic or recurring conditions bring in a second layer of protection. The federal Americans with Disabilities Act (ADA) applies to employers with 15 or more employees and prohibits discrimination against a qualified individual with a disability, meaning a physical or mental impairment that substantially limits one or more major life activities. If your illness fits that definition, your employer must provide a reasonable accommodation unless doing so would create undue hardship.11U.S. Equal Employment Opportunity Commission. The ADA – Your Employment Rights as an Individual With a Disability
Reasonable accommodations can include time off for treatment (even after FMLA leave has run out), a modified or part-time schedule, intermittent leave, temporary reassignment of duties, or remote work. You and your employer are expected to work together to find something that works for both sides. Firing you because accommodating your condition is inconvenient is not permitted; the employer has to show that the accommodation would cause significant difficulty or expense.
Colorado’s own anti-discrimination statute fills a critical gap. It prohibits firing, refusing to hire, or otherwise discriminating against a qualified individual because of a disability, and like the ADA it requires reasonable accommodations. The key difference is coverage: Colorado’s law reaches employers the ADA doesn’t, extending protection to workers at smaller businesses.12Justia Law. Colorado Revised Statutes Title 24, Article 34, Part 4, Section 24-34-402 If you work for an employer with fewer than 15 employees and believe you were fired because of a disability-related illness, the ADA won’t help, but state law may.
When an Employer Can Legally Fire You Anyway
None of these protections are unlimited.
The most common scenario is running out of leave. If you’ve used your 48 hours of HFWA, your FAMLI benefits have ended, and your 12 weeks of FMLA are up, your employer no longer has a legal obligation to hold your position. At-will takes over.
Eligibility gaps are the other major scenario. If you haven’t been with your employer long enough for FMLA, or your condition doesn’t rise to a “serious health condition,” those protections simply don’t apply. If your illness doesn’t qualify as a disability under either statute, your employer has no duty to accommodate extended absences.
Even when a protection applies, an employer can still terminate you if you can’t perform the essential functions of your job with or without a reasonable accommodation. Employers aren’t required to eliminate core job duties or hold a position open indefinitely.
Attendance policies also matter. If you fail to follow established call-in procedures, such as a no-call/no-show rule, you can be disciplined for the policy violation. The firing must be for violating the policy, not for the protected absence itself, and an employer who suddenly enforces attendance rules only against someone using protected leave is on much weaker legal ground than one who enforces them against everyone.
What to Do If You Think You Were Fired Illegally
Where you file depends on which law was broken.
For HFWA violations, including being denied accrued sick leave or retaliated against for using it, file a wage complaint with the Colorado Division of Labor Standards and Statistics. Denied sick leave is treated as unpaid wages under Colorado law and follows the same process.1Colorado Department of Labor and Employment. INFO 6B – Paid Sick Leave Under the Healthy Families and Workplaces Act Remedies can include recovery of denied wages, equitable relief, and in some cases punitive damages.13Colorado Department of Labor and Employment. INFO 2B – Orders of Wages, Penalties, Fines, and Consequences for Non-Compliance
For FMLA violations, contact the U.S. Department of Labor’s Wage and Hour Division at 1-866-487-9243. Complaints are confidential, and your employer cannot retaliate against you for filing one or cooperating with an investigation.14U.S. Department of Labor. How to File a Complaint
For disability discrimination under the ADA, file a charge with the Equal Employment Opportunity Commission (EEOC). You generally have 180 days from the discriminatory act to file, but that deadline extends to 300 days when a state or local agency enforces a law covering the same type of discrimination. Colorado has such a law, so the 300-day deadline typically applies here. The clock starts on the date of each discriminatory event and doesn’t pause while you try to resolve things internally.15U.S. Equal Employment Opportunity Commission. Time Limits for Filing a Charge
Keeping Health Coverage After You’re Let Go
Losing your job while dealing with a health condition creates an immediate problem: your insurance. If your employer had 20 or more employees and you were enrolled in the company health plan, federal law (COBRA) allows you to continue that same coverage for up to 18 months after a job loss. If you’re determined to have a disability within the first 60 days of COBRA coverage, that window extends to 29 months.16Office of the Law Revision Counsel. 29 USC 1162 – Continuation Coverage
You’ll pay the full premium your employer used to subsidize, plus a 2% administrative fee, so COBRA is expensive. For someone in the middle of treatment, keeping the same insurance network and avoiding a coverage gap can still be worth it. Your employer must notify you of your COBRA rights after your termination, and you have 60 days from that notice to elect coverage.