Write to HR or your manager, state the dates or expected treatment schedule, and ask which leave process applies. A provider’s note or certification may be required. In the United States, eligible employees may qualify for job-protected FMLA leave, but eligibility and employer coverage rules apply.
Cancer treatment may involve appointments, chemotherapy, radiation, surgery, recovery, and follow-up visits. A useful request focuses on the time away and the work arrangement needed—not unnecessary private medical details. If you need recurring appointments, ask whether intermittent leave or a reduced schedule can be documented.
How do I ask my employer for time off for cancer treatment?
Send a written request to HR or the person who manages leave. State when you expect treatment to begin and whether you need a continuous absence, recurring appointments, or a temporary schedule change. Ask which forms and notice rules apply.
Do not assume every employee qualifies for FMLA or paid leave. Ask about applicable benefits, state-law protections, disability plans, paid sick time, and workplace accommodations where relevant.
Include these details
- Expected start date and schedule, if known.
- Whether you expect continuous or intermittent leave.
- A plan for handover or urgent work, where practical.
- A request for the applicable forms and next steps.
Medical notes, privacy and FMLA
The U.S. Department of Labor explains that eligible employees of covered employers may take up to 12 workweeks of job-protected, unpaid leave during a 12-month period for qualifying serious health conditions. Eligibility generally includes 12 months of employment, 1,250 hours worked in the preceding 12 months, and a worksite where the employer has at least 50 employees within 75 miles.
An employer may request medical certification. Ask your provider and HR what information is necessary, and submit documents through the official confidential process. FMLA is generally unpaid, although employer-provided paid leave may run at the same time when the rules allow.
Before you rely on FMLA
- Check employer coverage and your eligibility.
- Ask for the appropriate certification form.
- Provide enough notice as soon as practical.
- Keep copies of the request, certification, and approval.
Leave of absence letter for cancer treatment
Subject: Request for medical leave / treatment-related schedule adjustment
Dear [HR Manager / Manager],
I am writing to request leave related to ongoing medical treatment, beginning on [Start Date]. My treatment plan is expected to involve [appointments / chemotherapy / radiation / recovery], and I may need [continuous leave / intermittent time off / a temporary schedule adjustment].
Please advise which leave options, forms, and medical certification requirements apply. If intermittent leave is available, I would appreciate guidance on how to document the anticipated frequency and duration. I will coordinate any necessary handover of work while protecting private medical information.
Thank you for handling this request confidentially.
Sincerely,
[Full Name]
[Role / Department]
Copy-ready letter
- Use approximate dates if the treatment schedule is not final.
- Ask HR how to submit medical forms confidentially.
- Avoid sharing diagnosis details with colleagues unless you choose to.
Recurring appointments or reduced hours
If treatment occurs over many dates, explain that the request may involve intermittent leave rather than one continuous block. Ask your provider to describe the expected frequency, duration, and medical need, and ask HR how to update the schedule if it changes.
Keep a private record of the dates submitted, approvals, and communications. If you need a temporary adjustment to hours or duties, ask HR about the company process and any applicable accommodation requirements.
Create your leave letter
Fill in the fields, generate a draft, and review it before sending.
Frequently asked questions
Official references and further reading
- U.S. Department of Labor — Workplace Protections for Individuals Impacted by Cancer
- U.S. Department of Labor — FMLA Fact Sheet #28
- U.S. Department of Labor — FMLA FAQs