The Grammar and Language of Resumes: Small Mistakes That Cost Big

I have a somewhat unpopular opinion in the career coaching world: grammar and language quality on resumes matter more than most people will tell you. Not because a comma splice is a firing offense, but because the way you write your resume is the most direct evidence the employer has of how you write in professional contexts. For roles that involve any form of written communication — which is most of them — this evidence is genuinely evaluated.

Over the years, I have watched hiring managers dismiss otherwise strong candidates over language quality on their resumes. Not always, not even most of the time. But often enough that it is worth taking seriously. The resume is the one document in your application that you have had unlimited time to review and refine. If it contains obvious errors, what does that suggest about documents you produce under time pressure?

"Your resume demonstrates your written communication ability as directly as any work sample. If you are not proud of the writing quality in every sentence, keep editing."

The most common errors that hurt candidates

Tense inconsistency is endemic on resumes and it drives careful readers to distraction. The convention is clear: current roles are described in present tense, previous roles in past tense. "Manage a portfolio of 12 enterprise accounts" for your current job. "Managed a portfolio of 12 enterprise accounts" for a role you have left. Mixing these within a single entry, or applying past tense to your current position, creates a grammatically jarring document that signals carelessness.

Bullet points that do not begin with strong, active verbs are a structural weakness, but when they begin with weak or passive constructions, they become a language problem as well. "Was responsible for the management of..." is three words of throat-clearing before we get to anything meaningful. "Managed..." begins the sentence with the action. Every bullet should begin with the strongest accurate verb you can find.

Inconsistent formatting of numbers, dates, and percentages is a smaller issue but a telling one. If you spell out "twelve" in one place and use "15" in another, the inconsistency is noticeable. Pick a convention — numbers above ten written numerically, dates in the same format throughout, percentages always as "%" not "percent" — and apply it consistently.

The passive voice problem

Resume language should be active because resumes are fundamentally about agency. The story you are telling is: I did things, and things happened because I did them. Passive voice inverts this, making things happen to or around you rather than because of you. "A new process was implemented" is not the same story as "Implemented a new process." "Revenue targets were exceeded" is not the same story as "Exceeded revenue targets."

The passive voice is especially problematic in contexts where agency matters — where the hiring manager is trying to determine who did what and how much credit belongs to this specific candidate versus their team. Passive constructions make that determination harder, and in the face of ambiguity, hiring managers often give candidates the benefit of the doubt least generously. Claim your agency clearly and in active voice.

Buzzwords and jargon: when they help and when they do not

Industry-specific terminology belongs on a resume when it is specific, accurate, and relevant to the target role. It signals fluency in the language of the field. Generic business jargon — "synergy," "leverage," "paradigm shift," "innovative," "disruptive," "holistic" — does the opposite. It signals that you are filling space with impressive-sounding words rather than substance.

The test for any piece of language is whether it adds information. "Developed an innovative, synergistic approach to cross-functional collaboration" adds zero information. "Built a shared project management framework adopted by seven teams, reducing duplicate work by 30%" adds genuine information. When you remove a word and the sentence means the same thing, the word was not doing work.

The proofreading imperative

Read your resume out loud. This sounds simple, and it is. But it works. The ear catches errors that the eye misses. You will hear the awkward sentence, the missing word, the subject-verb disagreement. Read it out loud, slowly, after you think it is finished.

Then give it to someone else to read. Not to praise it — to find the problems. Ask them specifically to tell you what is confusing, what is unclear, what seems like filler. Professional feedback is better than friend feedback here; friends tend to be encouraging rather than critical. If you can afford it, a professional editor or career coach is worth the investment for a document that will be read by every employer who considers you for the next several years.

The resume you write once and polish thoroughly is an asset that works for you repeatedly. The time you invest in making it excellent pays dividends with every interview it generates.