ChatGPT cover letter prompt: what to write and what to fix by hand

Why most ChatGPT cover letter prompts fail

The default prompt most people use is something like: 'Write a cover letter for a marketing manager role.' ChatGPT has almost nothing to work with, so it fills the gaps with filler phrases like 'I am a results-driven professional' and 'I am excited to bring my skills to your team.' Hiring managers see those phrases dozens of times a day.

The model is not the problem. The prompt is. ChatGPT produces specific output when you give it specific input. That means pasting in the job description, your relevant experience, and a clear instruction about tone and length.

The base prompt structure that works

Use this structure every time. Fill in the brackets with your real details before you send the prompt.

1. Paste the full job description under a label like 'JOB DESCRIPTION:'
2. Add your relevant experience under 'MY BACKGROUND:' — three to five bullet points with specific achievements and numbers
3. Name the company and the hiring manager if you have one
4. State the tone: professional, direct, and no longer than 300 words
5. Add one instruction: 'Do not use filler phrases like results-driven, passionate, or excited to join'

What to include in 'MY BACKGROUND'

This section is where most people are too vague. Do not write 'I have five years of experience in sales.' Write the specific thing you did and the result it produced.

Pull two or three points directly from the job description and match them to something you have actually done. If the job asks for experience managing a budget, write the size of the budget you managed. If it asks for Python, name the project you used it on.

• Include at least one number: revenue, team size, percentage improvement, or time saved
• Match the language in the job description where it is accurate — applicant tracking systems scan for keyword alignment
• Keep each point to one sentence so ChatGPT does not bury the detail in a long paragraph
• If you have a gap or a career change, note it briefly so the model can address it rather than ignore it

Prompts for specific situations

Different situations need different instructions added to the base prompt.

• Career change: add 'I am moving from [field A] to [field B]. Explain how my transferable skills apply without apologising for the change.'
• No degree but relevant experience: add 'Do not mention formal education. Focus on practical experience and outcomes.'
• Overqualified: add 'Do not highlight seniority. Focus on why this specific role and company appeal to me at this stage.'
• Short tenure or gap: add 'Acknowledge the gap briefly and pivot to what I did during that time: [one sentence].'
• Remote role in another country: add 'Note that I am based in [city] and am legally authorised to work remotely for a [US/UK/Canadian/Australian] employer.'

What you must edit by hand before sending

Even a well-prompted letter needs four manual checks. ChatGPT does not know things you have not told it, and it sometimes invents plausible-sounding details.

Read every factual claim. If the letter says you led a team of ten and you led a team of four, fix it. If it names a tool you have not used, remove it. Sending a letter with an inaccuracy is worse than sending a generic one.

Check the opening line. ChatGPT often starts with 'I am writing to express my interest in...' Delete that sentence and start with the strongest thing you bring to the role. For example: 'I cut customer acquisition cost by 30 percent at [Company] by rebuilding the paid search account from scratch, and I want to do the same work for [Hiring Company].'

Add one sentence that shows you know the company. Look at their recent news, a product launch, or a public goal. One specific reference does more than a paragraph of generic praise.

Confirm the word count. Most hiring managers prefer 250 to 350 words. If the output is longer, ask ChatGPT to cut it to 300 words, then read again to make sure nothing important was removed.

How Break-In Bad handles cover letters if you want to skip the prompt work

If you would rather not manage prompts manually, Break-In Bad writes a tailored cover letter for each job automatically. Omar reads the full job posting, matches it against facts you have confirmed in your profile, and produces a letter alongside a tailored resume. You review both before anything is submitted.

The system applies to roles on Greenhouse, Lever, Workday, and other employer sites and sends you a screenshot as proof of submission. Credits start at 25 for $9 and never expire. You get 50 free credits when you sign up.