When a cover letter helps, when it hurts

Most cover letters are read for 8 seconds. The reader scans the opening sentence, glances at the closing paragraph, and either keeps the candidate in the pile or moves on.

This means most cover letters do not earn their place. The CV would have done the same work without them. But three specific situations exist where a cover letter shifts the read in a way the CV alone cannot. And two situations exist where attaching a cover letter actively hurts.

When a cover letter helps

Situation 1: The role is non-obvious for your background

When a candidate's CV does not, on its own, signal a clear fit for the role, a cover letter does the work of explaining the connection. A senior banker applying for a role in healthcare technology benefits from a cover letter that names the bridge in the candidate's own words. The CV cannot make this argument. The cover letter can.

Situation 2: The hiring panel is small and reading carefully

For senior roles, executive searches, and small-team hires, the panel is reading every application carefully. A cover letter gives the candidate a second surface to communicate, and a thoughtful one is read with the same attention as the CV.

Situation 3: The application includes a written component as part of the assessment

Some senior roles, especially in writing-heavy fields like consulting, research, and journalism, treat the cover letter as a writing sample. The quality of the letter signals the quality of the candidate's written work. Skipping it sends a signal of its own.

When a cover letter hurts

Situation 1: A generic cover letter sent with a strong CV

A weak cover letter weakens a strong CV. A generic three-paragraph letter saying nothing the CV does not already say creates the impression of a candidate who is going through the motions.

If the cover letter is not earning its place, it is better to omit it. The CV does the work alone.

Situation 2: A cover letter that contradicts the CV

Cover letters that overclaim, oversell, or describe achievements differently from the CV create confusion. The reader notices. The candidate is read as inconsistent.

The fix is to keep the cover letter and the CV in alignment, with the cover letter expanding on what the CV implies, not contradicting it.

What a strong cover letter does

A strong cover letter is short. Three to four short paragraphs. Each paragraph does one job.

The opening paragraph names the role and the connection in one sentence.

The middle paragraphs identify two specific things the candidate brings that the role appears to need.

The closing paragraph is a clean exit, not a sales pitch.

When in doubt, write the letter and then decide

If the candidate is unsure whether to attach a cover letter, the right approach is to write a tight version of one and then decide. If the letter adds something the CV does not say, attach it. If it does not, omit it.

The decision becomes easier once the letter exists. The temptation to attach a generic version disappears once a real one is in front of you.

A note on AI-generated cover letters

A growing number of cover letters are now AI-generated. They are easy to spot. They follow a recognisable shape, use the same registers, and leave the reader feeling they have read something but cannot remember what.

Senior recruiters can tell. The cover letters that earn the read are written by hand, even when they are short. The candidates who let AI write them are taking the risk that the reader will recognise the source and discount the application.