Possessive Determiners

You've almost certainly sent a message that looked something like this: "Have you seen you're keys?" Autocorrect doesn't always save you — and neither does that dim memory of "something about ownership" from school. Or maybe it's the email you fire off at 4:55 on a Friday: "Please send me his report" — and then you pause, because a second colleague also needs to send one, and suddenly you're second-guessing whether it's his or hers, and whether either of those tiny words is doing what you think it's doing.

Let's be honest — most of us were never properly taught this. We just picked it up, the way you pick up which fork to use. That's fine until you're polishing a CV [US: résumé], drafting a careful email to your landlord, or helping a kid with homework, and suddenly you're not sure: Is it their account, or there account? Can I say someone forgot their keys?

The good news is, the pattern behind these words is genuinely simple once you see it — and once you see it, a whole set of small, needling errors tidies itself up for good.

These words — my, your, his, her, its, our, their — are called possessive determiners. They sit directly before a noun. We'll also glance at their cousins, mine, yours, his, hers, its, ours, theirs, which stand alone rather than sitting before a noun — but the full lesson on those lives in another article. This one sticks strictly to the determiner slot.

Before you read on, here's where we're heading. By the end you'll be able to: - Name and spot possessive determiners in your own writing. - Use my, your, his, her, its, our, their confidently before nouns, in the right order with adjectives. - Tell them apart from possessive pronouns like mine, yours without a moment's hesitation. - Avoid the classic traps — there/their/they're, its/it's — with a one-line flag and a pointer to the full fix.

Beginner (Foundation)

Start with a simple idea: a possessive determiner is a word that goes before a noun and tells us who something belongs to, or who it's connected with.

Here are the seven:

• my — "my laptop"
• your — "your keys"
• his — "his phone"
• her — "her appointment"
• its — "its screen"
• our — "our building"
• their — "their account"

Two quick checks tell you you're looking at a possessive determiner: it's always followed by a noun ("my meeting," "our train" — never just "my" on its own), and it shows possession or connection ("your application" — the one you submitted; "their car" — the one they own or use).

Now compare these pairs:

• "This is my seat."
• "This seat is mine."

Same idea, different job. My comes before a noun (seat) — it's a possessive determiner. Mine stands alone with no noun after it — it's a possessive pronoun. The full story on possessive pronouns lives in another article (H2.4); here we're just drawing a clean, useful line:

• determiner = before a noun: my seat, your idea
• pronoun = instead of a noun: That seat is mine.

One thing to nail down early: none of the seven possessive determiners ever takes an apostrophe. It's its, not it's, when you mean "belonging to it" — it's means it is or it has, a different word entirely. More on that shortly, with the full fix parked at H2.4.

Common Mistake: "This is my." That's incomplete. Either give it a noun — "This is my seat" — or switch to the pronoun: "This is mine."

Quick recap: - Possessive determiners show who something belongs to or is linked with. - They always come before a noun: my bag, their office. - The seven are: my, your, his, her, its, our, their. - They differ from possessive pronouns (mine, yours), which stand alone. - None of them ever takes an apostrophe.

Intermediate (Development)

Now let's put these determiners to work in real sentences and untangle the problems that actually turn up in adult writing.

Word order

The pieces of a noun phrase line up in a fixed order, and the possessive determiner always leads:

possessive determiner → (numbers) → adjectives → noun our → two → remaining → offices

Examples straight out of a work inbox:

• "my updated contact details"
• "your previous payment"
• "their annual staff survey"
• "our two remaining offices"

Flip the order and you'll hear instantly that it's wrong: "annual their survey" simply isn't English.

One determiner per noun

Here's the rule that catches people out under deadline pressure: you cannot stack a possessive determiner with another determiner in front of the same noun. English allows exactly one determiner per noun phrase. So "the my report" is not casual English or informal English — it's simply incorrect, full stop [US: period]. Neither is "this his desk." Pick one:

• ❌ the my report → ✅ my report or ✅ the report
• ❌ this his desk → ✅ his desk or ✅ this desk

This slip tends to appear when someone's translating a thought too directly, or typing fast and doubling up out of habit. Worth a second glance before you hit send.

Pro-Tip: If you've already got my, your, his, her, its, our, their before a noun, don't add the, a, an, this, that as well. One determiner is enough: "our new system," not "the our new system."

A small but useful word: own

Own slots in right after a possessive determiner for emphasis — "I'll use my own laptop," "she runs her own business." It always leans on a possessive determiner; it never stands alone.

Determiner vs pronoun

My, your, his, her, its, our, their sit before a noun. Mine, yours, his, hers, its, ours, theirs stand in for the noun completely:

This is my proposal. → This proposal is mine. Is that your signature? → Is that signature yours?

His and its look identical in both roles — one of those unhelpful overlaps English never bothered to sort out. If there's a noun immediately following the word, you want the determiner. For the full explanation of possessive pronouns and how they behave, see H2.4.

Common Mistake: Writing "her's," "our's," or "their's" — probably because it echoes a possessive noun like "the client's account." Resist it. None of the possessive pronouns ever take an apostrophe: hers, ours, theirs. In a job application or a client email, this small slip can look like carelessness in an otherwise polished document.

The usual suspects: their/there/they're and its/it's

• their = possessive determiner → "their proposal"
• there = a place or existence → "over there," "there is…"
• they're = "they are" → "they're working late"

Only their sits in front of a noun.

• its = possessive determiner → "its value"
• it's = "it is" or "it has" → "it's urgent"

Only its sits in front of a noun. A quick diagnostic if you're ever unsure: try replacing the word with "it is" or "it has." If the sentence still makes sense, use it's. If it doesn't, use its. The full breakdown of this trap, and the related whose/who's, lives at H2.4 — we're flagging it here, not re-teaching it.

Quick recap: - Possessive determiners come first in the noun phrase, before numbers and adjectives: your updated payment details. - Never stack two determiners — "the my report" is always wrong; choose one. - Own can follow a possessive determiner for emphasis: my own laptop. - Determiners (my) come before nouns; possessive pronouns (mine) replace nouns — full lesson at H2.4. - Only their and its can sit before nouns; there/they're and it's can't (full fix at H2.4).

Advanced (Mastery)

If you're aiming to write with more precision — in reports, applications, or anything that will be read carefully — it helps to see how possessive determiners interact with style, register, and meaning.

Singular "their"

You've probably written "Each employee must submit their timesheet by Friday" without a second thought — and you were right. This usage is now fully standard across professional and academic writing, endorsed by essentially every major dictionary and style guide, including in formal registers. It's exactly right in situations like "the tenant reported a leak in their bathroom," whether the tenant is one specific person of unknown gender or you simply don't want to specify. You'll occasionally meet resistance in very traditional or legal-adjacent documents, where "his or her" still lingers out of habit rather than necessity. Both forms are correct; one just carries an older-fashioned flavour [US: flavor].

Pro-Tip: In policies, manuals, and forms, using singular they/their ("the user must update their details") is usually clearer and more inclusive than "he or she."

People, things, and where the line blurs

The rough rule — his/her/their for people, its for things — has real exceptions. Pets often get human pronouns: "The dog wagged his tail." And organisations frequently take its even though they're made up of people: "The council reduced its budget." Neither is wrong; they're choices about tone and closeness.

Possessive determiner vs possessive noun

English offers two routes to possession, and it's worth knowing both exist:

1. Possessive determiner + noun: "my manager," "our office"
2. Possessive noun (apostrophe) + noun: "the manager's decision," "the company's website"

They can work together: "my company's policy" is my (determiner) + company's (possessive noun) + policy. The detailed apostrophe rules — company's vs companies' — live in H1.4. Here, the point is simpler: these are two separate tools that often combine.

Register and emphasis

Swapping the possessive determiner shifts tone. "That's my responsibility" claims personal ownership. "That's our responsibility" shares it. "That's your responsibility" can read as neutral or as blame, depending on context — worth a second look before you send it in an email that might land the wrong way. In customer-facing writing, this becomes a deliberate tool: "Manage your account online," "Track your order" — the possessive determiner builds a direct, friendly relationship with the reader.

Longer phrases and the head noun

Possessive determiners don't always sit next to the part of the sentence you're most focused on:

• "my first week at the new job"
• "their plans for the next quarter"

The determiner attaches to the head noun — week, plans — not to whatever comes at the end of the phrase. This matters when you're editing for clarity. Wordy: "The company's way of managing its projects could be improved." Cleaner: "We could improve our project management." Recognising the head noun helps you spot where a sentence can be tightened.

Avoiding possessive clutter

Formal writing sometimes overloads sentences with possessive words: "The company's employees must update their personal details in their own profiles on the company's system." You can streamline this by choosing possessive determiners carefully: "Employees must keep their personal profiles up to date." Choosing their over repeating the company's makes the prose feel more human and less bureaucratic — a small edit that pays off every time.

Common Mistake: "Me and my colleague's report was late." That's a genuine tangle. Cleaner: "Our report was late." In almost every context, our is the best fix — "my colleague's and my report" is technically fine but reads awkwardly.

Quick recap: - Singular their is standard, professional English for an unspecified or generic person. - The people/things split (his/her/their vs its) bends for pets and organisations. - Possessive determiners and possessive nouns (apostrophes) are separate tools that often combine — see H1.4. - Swapping my/our/your/their subtly shifts tone and responsibility. - In complex phrases, the determiner attaches to the head noun — spotting it helps you tighten wordy sentences.

UK vs US Note

The possessive determiners themselves, and the rules for using them, are identical in UK and US English — my, your, his, her, its, our, their behave exactly the same way on both sides of the Atlantic. The differences you'll spot are only in the spelling of surrounding words, for example "my favourite [US: favorite] project" or "our neighbours' [US: neighbors'] feedback," or in unrelated terminology like full stop [US: period] and CV [US: résumé]. The position and behaviour of the possessive determiner never changes.

Key Takeaways

• Possessive determiners are my, your, his, her, its, our, their, and they always sit before a noun.
• Word order is fixed: determiner → (numbers) → adjectives → noun, e.g. "our revised project plan."
• You can never stack two determiners: "the my report" is always wrong.
• Possessive determiners (my) are distinct from possessive pronouns (mine), which replace the noun rather than sitting before it — see H2.4.
• Its vs it's and their/there/they're are flagged here but fully explained at H2.4.
• Singular their is now standard in professional and formal writing for an unspecified person.

Check Your Understanding

1. Fill the gap: "___ quarterly figures were higher than expected." (Referring to a report belonging to him.)
2. Spot and correct the mistake: "This is the her office."
3. Choose the correct word: "The company announced ___ / it's new logo today."
4. True or false: theirs should be written with an apostrophe, as in "their's."
5. Rewrite this sentence to avoid clunky repetition, using a possessive determiner: "The client emailed the client's invoice to accounting."

Answer key:

1. His — "His quarterly figures were higher than expected."
2. Two determiners are stacked. Fix: "This is her office" or "This is the office."
3. Its — the possessive determiner, not the contraction it's.
4. False — it's theirs, never with an apostrophe.
5. "The client emailed her invoice to accounting" (or "his," depending on who the client is).

Internal Links

• H5.1 — Determiners generally: articles, demonstratives, quantifiers, and how possessives fit among them.
• H2.4 — Possessive pronouns (mine, yours, his, hers, its, ours, theirs) and the full, canonical fix for its/it's and whose/who's.
• H1.4 — Possessive nouns and apostrophe rules (the client's account, the employees' handbook).