How to Start a Cover Letter: Your Opening Is a Promise

Most guides on how to start a cover letter hand you a menu. Pick the achievement hook, the company-connection angle, the problem-solution opener.

That framing misses what actually decides whether the letter works, because how to start a cover letter is a question about evidence rather than style. Your opening writes a cheque that the rest of the letter has to cash. Open with a strategic insight and the body must demonstrate judgement. Open with an achievement and you owe the reader enough context to make the number mean something. A mismatch between the two weakens an application more reliably than a dull first sentence does.

So the question of how to start a cover letter is not which opener sounds best. It is which one your evidence can actually support.

How should you start a cover letter?

How you start a cover letter has one job: give the reader a reason to read the second.

In fact, the introduction carries disproportionate weight. Research reported across several 2026 surveys found 41% of hiring managers say the introduction leaves the biggest impression of any section, and 36% spend under 30 seconds on the whole letter. The opening is not a warm-up. On a short reading it is most of what gets read.

Which is why “I am writing to express my interest in the position advertised on your website” is such an expensive sentence. It spends 15 of your best words telling the reader something the application itself already told them.

How long should the opening be?

Treating the opening as a budget rather than a paragraph makes it much easier to write.

Anything longer and you are spending body-paragraph budget on setup. How long a cover letter should be covers where the rest of the words go.

Which opening should you use?

There are five ways to start a cover letter, and each obliges you to prove something different:

That right-hand column is the part most advice skips. A candidate who opens with a bold strategic observation and then writes three paragraphs of generic enthusiasm has done more damage than one who opened plainly.

Twenty ways to start a cover letter

Achievement leads — you have a number you can defend.

1. “The distributed system I redesigned now processes 4 million events a day, up from 200,000 when I joined.”
2. “I cut onboarding time from eleven days to three across 4,000 accounts, which is the problem your posting describes.”
3. “Last year I rebuilt a paid-search programme that had run unchanged for three years, taking cost per lead from $180 to $96.”
4. “I’ve closed the monthly accounts in five days for two years running, down from twelve when I took it over.”

Company connections — you actually know their work.

1. “I’ve followed your work in accessible design for several years, so when the UX researcher role appeared, applying felt like an obvious next step.”
2. “Your November post on deprecating the legacy pipeline described the exact migration I ran at Wexford.”
3. “I’ve been using your API since the v2 rewrite, and the changes to rate limiting solved a problem I’d worked around for months.”
4. “Your 2025 partnership on sustainable packaging connects directly to the materials research I’ve been doing.”

Contacts, problems and background

Mutual contacts — someone sent you.

1. “Priya Rao suggested I get in touch about the analyst role — we worked together on the reporting migration at Wexford.”
2. “I met two of your engineers at the Berlin meetup in March, and the way they described the platform work is why I’m applying.”
3. “Sam Okafor mentioned you’re hiring for operations, and having worked alongside him for three years, I think the fit is close.”

Problem-solution — you understand their situation.

1. “Your posting mentions the warehouse migration slipping twice. I ran that sequence in the wrong order once, and would start by measuring which reports break before touching the schema.”
2. “Scaling support from 20 to 200 accounts usually breaks at the handover between onboarding and success — that’s the seam I’ve spent three years working on.”
3. “Most forecasting models fail because nobody owns the inputs. That’s the part I’d want to fix first.”

When your background is the argument

Relevant experience — your background maps cleanly.

1. “I’ve spent the past two summers writing for a 50,000-subscriber newsletter, which is what drew me to the content marketing role.”
2. “Six years in clinical operations, now building the dashboards that team wished it had — SQL, Python and healthcare data I already understand.”
3. “I’ve run payroll for three companies through two acquisitions, so the migration in your posting is familiar territory.”
4. “Three production React apps shipped during a twelve-month internship, including the booking flow now handling 2,000 orders a week.”
5. “I moved from teaching to instructional design four years ago, and the curriculum work in this role is what I’ve been doing since.”
6. “I’ve managed a 14-site logistics network through two peak seasons, which is the scale your posting describes.”

Meanwhile, notice what every one of them has: a detail no other applicant could reproduce. That is the entire mechanism.

Generic: "I am writing to express my strong interest in the Senior Data Analyst position at BrightPath. With over six years of progressive experience in data analysis, I believe I would be a valuable addition to your team."
Specific: "Your posting mentions the warehouse migration slipping twice. I ran that same sequence at Wexford in the wrong order, spent six weeks unpicking it, and would start by measuring which reports actually break before touching the schema."
Both are about forty words. The first could have been sent to any company; the second could only have come from one person — and it obliges the next paragraph to prove the claim, which is a useful constraint rather than a burden.

Who should you address it to?

Fortunately, five minutes of searching usually produces a name, and a name changes how the whole letter reads.

The hierarchy is straightforward: “Dear Ms Chen” beats “Dear Analytics Hiring Team” beats “Dear Hiring Manager” beats “To Whom It May Concern”, which is the fastest way to announce that this letter went to twenty companies.

One caution, though, on names: verify the spelling and the current role. Addressing a letter to someone who left eight months ago is worse than addressing nobody.

What openings should you avoid?

Four ways to start a cover letter badly, all common and all fixable:

The announcement. “I am writing to apply for the position advertised on Indeed.” They know. It costs 12 words.

Unbacked enthusiasm. “I am thrilled to apply” without a reason is a claim about your feelings, and feelings are not evidence.

Adjective stacking. “I am a hard-working, detail-oriented team player with excellent communication skills.” Every adjective there is meaningless without proof, and a reader discounts all of them automatically.

The mirror. Restating the job title and requirements back at the employer proves you read the posting, which is the lowest possible bar.

What weakens an application is not just a bland first line. It is a mismatch between the opening claim and the paragraphs that follow.

Finally, one structural note. Since an AI cover letter generator will produce a competent opening in seconds, the opening no longer signals effort by existing — only its specificity does. Generate the draft if you like, then replace the first two sentences with something only you could write. And once the letter is done, the resume it accompanies faces a different reader entirely: an AI resume checker will tell you whether that one parses and matches.