One tiny apostrophe can change everything about a sentence. That is the story of lets and let’s, two words that look almost identical, sound exactly the same when spoken, and yet do completely different jobs in English grammar. It is one of the most common spelling mistakes in everyday writing, and even native speakers type the wrong one when they are in a hurry.
The confusion is understandable. Both words come from the same root, the verb let, and both are spelled with the same four letters in the same order. The only visible difference is a single apostrophe sitting between the t and the s in let’s. But that apostrophe carries real meaning: it marks a missing letter. Let’s is a shortened form of let us, and the apostrophe stands in for the dropped u. Remove the apostrophe and you no longer have a contraction at all — you have a different word entirely, the plain verb lets, which means allows or permits.
This guide breaks down the difference between lets and let’s in plain, practical terms. You will learn what each word means, the exact grammar rules behind them, and how to use each one correctly in real sentences. We will compare them side by side, walk through the most common mistakes people make, and finish with answers to the questions readers ask most often. By the end, a simple trick will make sure you never mix them up again.
What Does “Lets” Mean?
Lets, written without an apostrophe, is a verb. More precisely, it is the third-person singular present tense form of the verb let, which means to allow, to permit, or to release. It follows the standard pattern of English verbs: when the subject is he, she, it, or any single noun, the base verb gains an s at the end. Just as run becomes runs and eat becomes eats, let becomes lets. Consider the sentence: She lets her younger brother use her laptop on weekends. Here, lets simply reports an action — she allows it, she permits it. There is no suggestion, no invitation, and no speaker including themselves in the plan.
The word lets works in any context where permission, release, or allowance is being described. A landlord lets a tenant keep a pet in the apartment. A new software update lets users customize their home screen. A teacher lets her students leave five minutes early on Fridays. In each case, the subject is doing the allowing, and the sentence describes that fact the way any other verb would. Notice how naturally you could swap lets for allows in these sentences: She allows her younger brother to use her laptop means exactly the same thing as She lets her younger brother use her laptop. If that swap works smoothly, you are dealing with the verb lets, no apostrophe needed.
One important rule to remember is that lets only appears with third-person singular subjects. It does not work with I, you, we, or they, and it does not work with plural nouns. Saying They lets us in or I lets him go is always wrong — with those subjects, the base form let is correct: They let us in, I let him go. This is the same agreement rule that applies to every regular verb in the present tense. When you see lets in a sentence, you can be sure the subject is a single person, animal, or thing, and the sentence is describing an act of permission or release rather than making a suggestion.
What Does “Let’s” Mean?
Let’s, with the apostrophe, is a contraction of two words: let and us. It is used to make a suggestion, a proposal, or an invitation to do something together. When someone says Let’s go to the park, they are really saying Let us go to the park, with the speaker including themselves in the action. Unlike the verb lets, which describes permission from the outside, let’s pulls the speaker and the listener into a shared plan. It turns a bare command — Go to the park — into a friendly joint suggestion.
This inclusive quality is why let’s appears so often in everyday speech, teaching, leadership, and marketing. A coach says Let’s give it our best today to build team spirit. A manager writes Let’s finish this by Friday instead of the colder Finish this by Friday, because the first version feels like teamwork rather than an order. In all of these cases, let’s is doing the same job: framing an action as something we do together.
Grammatically, let’s usually appears at the start of an imperative-style sentence, followed by the base form of a verb: Let’s eat, Let’s try again, Let’s not argue about this. The subject of the sentence is an understood you, just as in any imperative, but the meaning includes the speaker as a participant. It is important to see that let’s is not conjugated for different subjects — you never write he let’s or she let’s as a suggestion form. The contraction is fixed, and it always refers to us, meaning the speaker plus whoever they are talking to. If the subject of the sentence is a third person, the verb form is lets without the apostrophe, and the meaning switches to permission.
The negative form of let’s is let’s not, which proposes that the group should avoid doing something: Let’s not jump to conclusions, Let’s not waste any more time. In formal writing, the uncontracted let us is preferred over let’s, partly because contractions are generally avoided in formal registers and partly because let us sounds more deliberate. A speaker at a ceremony might say Let us pray rather than Let’s pray, because the full form carries more weight. In casual writing and speech, though, let’s is the natural choice everywhere.
The Key Differences Between Lets and Let’s
The difference between lets and let’s is grammatical, not a matter of style or preference. They are two different words with two different jobs, and the apostrophe is the marker that tells them apart. The simplest way to keep them straight is to remember what the apostrophe stands for: a missing u. Let’s is let us with the u removed and an apostrophe marking the gap. If the sentence makes sense with let us in place of the word, you need the apostrophe. If it does not, you need the plain verb lets. Try it: Let’s go home becomes Let us go home, which works perfectly. She lets us go home becomes She let us us go home, which is nonsense — proof that the second sentence needs lets without an apostrophe.
A side-by-side comparison makes the contrast clear:
| Feature | Lets (no apostrophe) | Let’s (with apostrophe) |
|---|---|---|
| Full form | There is none — it is already the complete verb | Let us (the apostrophe replaces the letter u) |
| Part of speech | Verb, third-person singular present tense | Contraction, used in suggestions and proposals |
| Meaning | Allows, permits, releases | Proposes that we do something together |
| Subjects it works with | He, she, it, or any singular noun | Always refers to us (speaker plus listeners) |
| Example | He lets the dog out every morning. | Let’s take the dog out this morning. |
| Quick test | Can be swapped with allows | Can be expanded to let us |
He lets the dog out every morning reports a routine act of permission by one person. Let’s take the dog out this morning is an invitation for the speaker and listener to do something together. Swapping the spellings — He let’s the dog out or Lets take the dog out — breaks both sentences. That is how different the two words really are: they cannot stand in for each other.
How to Use “Lets” Correctly
Using lets correctly comes down to one question: is a single person or thing allowing something? If the answer is yes, lets is your word, and the subject of the sentence will be he, she, it, or a singular noun. The pattern is subject + lets + someone or something + base verb. In The coach lets the players choose their own warm-up, the coach is the single subject doing the allowing. In This app lets you track your spending automatically, the app is the singular subject doing the allowing. The structure never changes, and it is the same structure English uses for every other verb in the third-person singular.
Pay attention to subject-verb agreement, because this is where most errors with lets happen. Plural subjects take the base verb let, not lets: My parents let me stay out late is correct, while My parents lets me stay out late is not. The same goes for I, you, we, and they: They let the kids play outside, never they lets. A quick check before you write the sentence saves the mistake — ask yourself whether you would write He allows or They allow, and match lets to allows and let to allow.
Lets also pairs naturally with object pronouns: lets me, lets him, lets her, lets them, lets us. That last pairing deserves a moment of attention, because it is the source of real confusion. She lets us leave early is a perfectly correct sentence meaning She allows us to leave early. But it is completely different from Let’s leave early, which means Let us leave early — a suggestion to go together. The first sentence describes permission granted by one person; the second proposes a shared action.
In questions and negative statements, lets follows the normal rules for third-person singular verbs. In a question, the auxiliary verb carries the s, so the main verb returns to its base form: Does your manager let you work from home? — not Does your manager lets you. In a negative sentence the same thing happens: The system does not let guests post comments, not does not lets. Only in a plain affirmative statement does lets itself carry the s. This is exactly how verbs like watches, writes, and speaks behave, so the pattern should feel familiar.
How to Use “Let’s” Correctly
Using let’s correctly starts with recognizing its purpose: it makes a suggestion or proposal that includes the speaker. The pattern is Let’s + base verb, and it usually opens the sentence: Let’s order pizza tonight, Let’s check the results together, Let’s be honest about what went wrong. The verb after let’s always stays in its base form — you write Let’s go, never Let’s goes or Let’s going. That base verb describes the action the whole group is being invited to do.
Because let’s is built for collaboration, it softens what would otherwise be a direct command. Compare Finish your homework with Let’s finish our homework. The first is an order aimed at one person. The second is a shared plan that includes the speaker, and it feels warmer, more encouraging, and less confrontational. Teachers use this constantly — Let’s try that problem again — and so do parents, managers, friends, and anyone trying to motivate a group without sounding bossy. If your goal is to propose rather than to command, let’s is the tool you want.
There are a few places where let’s does not belong. Do not pair it with a third-person subject: She let’s go is never correct as a suggestion, because let’s always means let us, and she let us go would need the words separated and a different sentence entirely. Do not use let’s when you mean simple permission — The teacher let’s us leave is a mistake; the teacher is granting permission, so the verb form is lets: The teacher lets us leave. And in formal writing, prefer the uncontracted let us: Let us now turn to the next item on the agenda suits a board meeting better than Let’s now turn to the next item.
Common Mistakes With Lets and Let’s
The most common mistake is also the most visible: writing lets when you mean to make a suggestion. Lets go to the beach this weekend is wrong — the writer means Let us go, so the apostrophe is required: Let’s go to the beach this weekend. This error shows up constantly in text messages, social media captions, and emails, because people type quickly and the apostrophe takes an extra keystroke on phone keyboards. The meaning survives in casual contexts, but in anything professional, the missing apostrophe reads as careless. Whenever you are proposing an activity, pause and check: can I expand this to let us? If yes, the apostrophe stays.
The mirror-image mistake is writing let’s where the verb lets belongs. My boss let’s me leave early on Fridays is incorrect — the boss is granting permission, not joining a suggestion, so the sentence needs the plain verb: My boss lets me leave early on Fridays. The expansion test catches this one too: My boss let us me leave early on Fridays is obvious nonsense, which proves the apostrophe has no business there. This error often comes from overcorrection — people learn that let’s is the tricky one and start sprinkling apostrophes where they do not belong. Trust the test instead of your instincts.
A third common error involves the lets us versus let’s confusion described earlier. Because lets us and let’s sound identical and share the same letters, writers sometimes merge them into one word in the wrong places. She let’s us decide combines two errors: the apostrophe is wrong, and the verb should agree with she as plain lets — She lets us decide. Conversely, Lets us decide together is wrong when the meaning is a shared suggestion — it should be the single contraction Let’s decide together.
Another frequent slip happens in questions and negatives, where the auxiliary verb should carry the agreement instead of the main verb. Does she lets you use her car? is wrong — it should be Does she let you use her car?, because does already shows the third-person agreement. Similarly, He doesn’t lets anyone borrow his tools should be He doesn’t let anyone borrow his tools. English only marks the agreement once per verb phrase, so once does or doesn’t is in the sentence, let stays in its base form. This rule applies to every verb, not just let, but it trips people up here because they are already thinking hard about the apostrophe.
Frequently Asked Questions
What is the difference between lets and let’s?
Lets without an apostrophe is the third-person singular present tense of the verb let, and it means allows or permits — for example, She lets me borrow her books. Let’s with an apostrophe is a contraction of let us, and it is used to make a suggestion or proposal that includes the speaker — for example, Let’s study together tonight. The apostrophe marks the missing letter u from us. The two words cannot be swapped: one describes permission, the other proposes a shared action.
Can “lets” be used with “us”, as in “lets us”?
Yes, and this is a correct and common construction. She lets us leave early means She allows us to leave early — the verb lets agrees with the third-person subject she, and us is simply the object receiving permission. It is completely different from Let’s leave early, which is the contraction of let us and proposes a shared action. To tell them apart, look at the subject: if a third person is doing the allowing, write lets us as two words with no apostrophe; if the sentence is a suggestion that includes the speaker, write the single word let’s.
Is “let’s” formal or informal?
Let’s is informal to neutral. It is perfectly fine in conversation, emails, presentations, marketing copy, and most everyday writing. In formal writing — academic papers, legal documents, official letters — the uncontracted form let us is preferred, because formal registers generally avoid contractions. So Let us now consider the evidence suits a formal report, while Let’s look at the evidence suits a classroom or a meeting. The meaning is the same in both cases; only the tone changes.
What is the negative form of “let’s”?
The negative form of let’s is let’s not, followed by the base verb: Let’s not argue about this, Let’s not forget to call her, Let’s not jump to conclusions. It proposes that the group should avoid doing something, and it keeps the same inclusive, collaborative tone as the affirmative form. In formal writing, the uncontracted version let us not is used instead: Let us not forget those who came before us.
How can I remember the difference between lets and let’s?
Use the expansion test: try replacing the word with let us. If the sentence still makes sense, you need the apostrophe — let’s. If it sounds like nonsense, you need the plain verb lets. Let’s go swimming expands to Let us go swimming, which works, so the apostrophe stays. He lets me drive expands to He let us me drive, which is nonsense, so there is no apostrophe. A second trick is the swap test: if you can replace the word with allows, you need lets without an apostrophe — She allows me to drive works just like She lets me drive. Keep one of these tests in your back pocket and the confusion disappears for good.
Conclusion
Lets and let’s may look like twins, but they lead entirely different lives in English. Lets is the workhorse verb of permission — a third-person singular form that reports who allows what, from a boss granting an early Friday to an app unlocking a new feature. Let’s is the social connector — a contraction of let us that turns commands into invitations and proposals into shared plans. The apostrophe is not decoration; it marks the missing u and signals that the speaker is part of the action. Once you see the two words as different tools for different jobs, choosing between them stops being a guessing game.
The best habit you can build is the two-second check before you write either form. Ask whether the sentence proposes something we do together — if so, write let’s with the apostrophe. Ask whether a single person or thing is allowing something — if so, write lets without it. Run the let us expansion or the allows swap whenever you hesitate, and match the formality to your setting with let us in formal documents. These small checks take almost no time, and they will keep your writing clear, correct, and confident every single time.
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