“Years’ experience” is correct when you’re describing an amount of experience measured in years — the apostrophe goes after the “s” because “years” is plural and possessive, as in “five years’ experience.” If you’re talking about just one year, it becomes “a year’s experience,” with the apostrophe before the “s.” Get this wrong and it’s one of those small errors that jumps out at hiring managers and editors alike.
The Short Answer
Use an apostrophe with “years” when it’s functioning as a possessive measurement of time, not a straightforward plural. Think of it the same way you’d think of “a day’s work” or “two weeks’ notice.” The time period technically “owns” the noun that follows it.
- One year: a year’s experience (apostrophe before the s)
- More than one year: five years’ experience (apostrophe after the s)
- No apostrophe needed: when “years” is just a plain plural noun, e.g., “She has spent ten years abroad.”
Why the Apostrophe Belongs There
English treats time, money, and distance as if they own the noun that follows. This is called a “measurement genitive” or “genitive of time,” and it works the same way ordinary possessives do. Compare it to something concrete: “the dog’s bowl” shows the dog owns the bowl. “Five years’ experience” shows, in a looser sense, that the five-year span owns the experience being described.
You can test this by mentally rewriting the phrase with “of”: “five years’ experience” becomes “experience of five years.” If that rewrite makes sense, the apostrophe belongs. Try it with other examples:
- Two weeks’ notice → notice of two weeks
- A day’s work → work of a day
- Ten years’ worth of data → worth of ten years, of data
Where People Get It Wrong
The most common mistake is dropping the apostrophe entirely and writing “5 years experience” on a resume or job posting. Because “years” already ends in “s,” it’s easy to assume no extra punctuation is needed. But the plural “s” and the possessive apostrophe are doing two different jobs — one makes the word plural, the other signals the measurement relationship to “experience.”
The second most common mistake is placing the apostrophe before the “s” even when talking about multiple years — writing “5 year’s experience” instead of “5 years’ experience.” The apostrophe placement follows normal possessive rules: singular nouns take ‘s, plural nouns ending in s take just an apostrophe.
A Simple Placement Table
| Phrase | Correct Form | Why |
|---|---|---|
| One year | a year’s experience | Singular possessive: apostrophe + s |
| Multiple years | five years’ experience | Plural possessive: s + apostrophe |
| Just describing years, no possession | ten years abroad | Plain plural, no apostrophe |
Examples in a Sentence
- She brings over ten years’ experience in digital marketing.
- He needs at least a year’s experience before applying for the senior role.
- The job listing asked for three years’ experience in customer service.
- After just one year’s experience abroad, her language skills improved dramatically.
An Easy Workaround
If you’re ever unsure, you can sidestep the apostrophe question entirely by rephrasing. Instead of “five years’ experience,” write “five years of experience.” Both are grammatically correct and mean the same thing, but the “of” version removes any risk of punctuation error — useful when you’re proofreading a resume at midnight and don’t want to second-guess yourself.
Key Takeaways
- Years’ experience takes an apostrophe after the “s” when referring to more than one year.
- A year’s experience takes the apostrophe before the “s” for a single year.
- The rule follows the same logic as other time-based possessives like “two weeks’ notice” or “a day’s pay.”
- Rewriting with “of” (five years of experience) is a safe, apostrophe-free alternative.
- Dropping the apostrophe altogether (“5 years experience”) is a common but avoidable error, especially on resumes.
Frequently Asked Questions
Is it “years experience” or “years’ experience”?
“Years’ experience” is correct. The apostrophe shows that the experience is measured by a span of years, following the same rule as other time-based possessives.
Do you need an apostrophe in “5 years experience”?
Yes. It should be written as “5 years’ experience,” with the apostrophe placed after the “s” since “years” is plural.
Is “1 year’s experience” correct?
Yes. Because “year” is singular here, the apostrophe goes before the “s”: “a year’s experience” or “1 year’s experience.”
Can I avoid the apostrophe entirely?
Yes. Writing “years of experience” instead of “years’ experience” is equally correct and removes any punctuation guesswork.
Why does “years” need an apostrophe if it’s already plural?
The plural “s” and the possessive apostrophe serve different purposes. The “s” makes “year” plural, while the apostrophe shows the possessive, time-measurement relationship to “experience.”
Is this rule the same for other time words like “weeks” or “months”?
Yes. The same pattern applies to phrases like “two weeks’ notice,” “six months’ rent,” or “a day’s work.”
Apostrophes in time-based phrases trip up even experienced writers, but the rule is consistent once you see the pattern. If small punctuation questions like this one keep catching you off guard, take a look around the rest of the site — there’s a whole library of quick, clear answers waiting.
