A resignation letter should be half a page or less, roughly 75 to 150 words. Three to five short sentences are enough to cover everything your employer actually needs from this document. Anything longer risks introducing details that don’t belong in a written record your company will keep on file.
Why Shorter Is Better
A resignation letter has one job: to formally notify your employer that you’re leaving and when your last day will be. It’s a business document, not a personal essay. A copy typically stays in your personnel file, which means anything you write could be read by HR staff, future managers, or legal teams long after you’ve moved on. Keeping the letter short protects you from including something you’ll regret later.
What to Include
Every resignation letter needs exactly four pieces of information:
- A clear statement that you’re resigning, including your job title and the company name
- Your last working day, calculated from the notice period in your contract or employee handbook
- A brief thank-you, one sentence acknowledging the opportunity
- Your name and the date
That’s it. A letter covering these four points will land somewhere around 75 to 100 words, and there’s no professional reason to go further. If your manager wants to talk about your reasons for leaving or your experience at the company, that conversation can happen in person or during an exit interview.
What to Leave Out
The biggest reason resignation letters get too long is that people treat them like a goodbye speech. Resist that impulse. Complaints about management, coworkers, or company culture don’t belong here. Even if frustration is the reason you’re leaving, putting it in writing creates a permanent record that can follow you. Your current boss and colleagues may end up as references down the road, and hiring managers in your industry may know each other.
Don’t explain your reasons for leaving in detail. A short, neutral statement like “I’ve decided to pursue a new opportunity” is sufficient if you feel the need to say anything at all. Going deeper invites follow-up questions in writing and gives the company information they don’t need.
Skip details about your new job. Mentioning your new employer, your new salary, or how excited you are about the role can come across as boastful, and it adds nothing useful to the letter. Similarly, don’t name specific colleagues who influenced your decision to leave. Singling people out, positively or negatively, can create problems for them and for you.
Finally, keep any expressions of gratitude to one or two sentences. A genuine, brief thank-you reads as professional. A full paragraph of praise can come across as insincere, especially if your departure is abrupt or the relationship with your manager has been rocky.
Does Seniority Change the Length?
Not meaningfully. Senior roles often come with longer notice periods, sometimes two to three months for executives compared to two weeks for most other positions. But a longer notice period doesn’t mean a longer letter. You still only need to state your resignation, confirm your last day, and sign off. The complexity of a leadership transition gets handled through meetings and handoff plans, not through extra paragraphs in your resignation letter.
One small addition some senior employees make is offering to help with the transition, something like “I’m happy to assist with the handover during my notice period.” That’s one sentence and keeps the letter well under a full page.
A Practical Template
Here’s what a complete resignation letter looks like at the right length:
Dear [Manager’s Name],
Please accept this as formal notice of my resignation from my position as [Job Title] at [Company Name]. Based on my [X-week/month] notice period, my last day will be [Date]. Please let me know if you calculate a different end date.
Thank you for the opportunity to work with the team. I wish the company continued success.
Sincerely,
[Your Name]
[Today’s Date]
That’s roughly 80 words. It covers every required element, leaves no room for misinterpretation, and takes less than a minute to read. You can adjust the thank-you line to reflect your actual experience, but the structure stays the same whether you’ve been at the company for six months or fifteen years.