Signup and sign-up look almost identical, but they do not always work the same way. The correct form depends on how the word is being used in a sentence.
In modern English, sign-up is commonly used as a noun or adjective, while sign up is the standard verb form.
Signup as one word is also used, especially in digital and business contexts, but it is less consistent across style guides and dictionaries.
Quick Answer
- Sign up = verb: Please sign up for the newsletter.
- Sign-up = noun or adjective: The sign-up process is easy.
- Signup = one-word noun/adjective used by some websites, apps, and businesses: The signup page is ready.
- Sign-up is not normally written with a hyphen when it is used as a verb.
So, if you mean “to register or join,” use sign up.
Correct: Sign up for an account today.
Not standard: Signup for an account today.
Sign Up as a Verb
Sign up is a phrasal verb. It means to register, join something, or agree to take part in an activity.
For example:
- I want to sign up for the course.
- You can sign up for a free account.
- She signed up for the workshop.
- They signed up to receive email updates.
- Did you sign up for the event?
Here, sign and up remain two separate words because they form a verb.
The same pattern applies in different tenses:
| Tense | Example |
|---|---|
| Present | I sign up for the service. |
| Past | I signed up for the service. |
| Future | I will sign up tomorrow. |
| Infinitive | I want to sign up. |
| -ing form | I am signing up now. |
Sign Up vs. Signup in a Verb
A common mistake is to write signup when the word is acting as a verb.
Use:
Please sign up before Friday.
Not:
Please signup before Friday.
The verb remains sign up, even when the sentence is written in a short button or instruction.
Sign-Up as a Noun
When you use the expression as a noun, sign-up can be written with a hyphen.
It refers to the act or process of registering or joining something.
Examples:
- The sign-up takes less than two minutes.
- We received 500 sign-ups this week.
- The sign-up process is simple.
- Your sign-up was successful.
In these sentences, the word is not telling someone to perform an action. It is naming the registration process or event.
Compare these two sentences:
Sign up for our newsletter.
The sign-up process is quick.
The first uses sign up as a verb. The second uses sign-up as a noun.
Sign-Up as an Adjective
Sign-up can also modify another noun.
For example:
- sign-up form
- sign-up page
- sign-up process
- sign-up link
- sign-up button
- sign-up sheet
Here, the hyphen helps show that the words work together as a compound modifier.
For example:
Please complete the sign-up form.
The phrase sign-up describes the type of form.
Is Signup a Single Word?
Yes, signup is used as a single word, especially in technology, marketing, and online services.
You may see phrases such as:
- signup page
- signup form
- signup process
- signup link
- signup flow
This one-word form is common in digital products and website copy. However, it does not mean that signup should replace sign up everywhere.
The important distinction is its grammatical role.
If you are using the expression as a verb, sign up is the safe standard choice:
Sign up for a free account.
If you are using it as a noun or adjective, you may encounter sign-up or signup, depending on the style being followed.
Is There a Hyphen in Sign-Up?
There can be a hyphen when the expression is used as a noun or adjective.
For example:
The sign-up process takes five minutes.
But there is no hyphen when it is used as the verb:
Sign up for the course.
This gives you a simple rule:
Verb → sign up
Noun/adjective → sign-up or signup, depending on style
The one-word form signup is especially common in digital writing, so you may see both sign-up and signup used for nouns and modifiers.
Signup vs. Sign-Up
The difference between signup and sign-up is mainly a matter of spelling and style when the expression is not being used as a verb.
| Form | Main use | Example |
|---|---|---|
| sign up | Verb | Sign up for the newsletter. |
| sign-up | Noun/adjective | The sign-up form is below. |
| signup | Noun/adjective in some styles | The signup page is ready. |
The biggest mistake is treating all three forms as interchangeable.
For example:
Sign up for our service. ✓
Sign-up for our service. ✗
Signup for our service. ✗
But:
The sign-up process is easy. ✓
The signup process is easy. ✓
The choice between sign-up and signup in the last examples can depend on the publication, company, or style guide.
What Does Signup Mean?
Signup generally means the act or process of registering for a service, account, event, newsletter, or other activity.
For example:
The website has a simple signup process.
Here, signup means the process of registering.
You may also see signup used for the number or group of people who register:
The campaign generated a large number of signups.
In other writing styles, the same idea may appear as:
The campaign generated a large number of sign-ups.
Both forms can be encountered in real-world English, but consistency matters within the same publication.
Sign Up in Websites and Apps
Online writing often makes this distinction confusing because websites and apps use short labels such as:
- Sign Up
- Sign up
- Signup
- Sign-up
For a button that tells the user what to do, Sign Up is the clearest verb form:
Sign Up
The same applies to calls to action:
Sign up for free.
Sign up to continue.
Sign up for weekly updates.
When describing the feature itself, a website might use signup or sign-up:
The signup page collects your email address.
The sign-up form appears on the homepage.
This is why you may see different versions across websites without all of them representing the same grammatical use.
Common Mistakes With Sign Up
Using “Signup” as a Verb
This is one of the most common errors.
Incorrect: Signup for our free course.
Correct: Sign up for our free course.
When the expression follows a subject and describes an action, use sign up.
Adding a Hyphen to the Verb
Another common mistake is:
Incorrect: Please sign-up today.
Use the two-word verb instead:
Correct: Please sign up today.
Treating Every Use the Same Way
It is easy to assume that one spelling should work everywhere. English does not always work that way with compound expressions.
Compare:
Sign up for an account.
The sign-up form is ready.
The grammatical function changes, so the spelling changes too.
Sign-Up Form or Signup Form?
Both sign-up form and signup form can be found in modern English.
Sign-up form follows the traditional hyphenated compound style:
Please complete the sign-up form.
Signup form is also widely used in digital and product writing:
Please complete the signup form.
If your website or publication has a house style, follow it consistently. If you are writing formal general English and want to make the compound structure clear, sign-up form is a straightforward choice.
The key point is that neither form should be confused with the verb sign up.
Sign Up or Register?
Register often have the same basic meaning, but they can have slightly different tones.
Sign up is common in everyday conversation, websites, apps, newsletters, courses, and online services.
Sign up for our free newsletter.
Register can sound more formal and is common for events, official services, classes, and applications.
Register for the conference by Monday.
Depending on the context, other alternatives include join, enroll, subscribe, and create an account.
Examples in Real Sentences
Here are some natural examples showing the different forms:
Verb:
I decided to sign up for the photography class.
Verb:
You need to sign up before you can access the course.
Noun:
The sign-up was completed in less than a minute.
Noun:
We had 200 sign-ups during the first week.
Adjective:
The sign-up page has been redesigned.
One-word noun/adjective:
The new signup page is much easier to use.
These examples show why context matters more than simply memorizing one spelling.
How to Remember the Difference
A simple memory trick is:
If someone is doing it → sign up.
If you are naming it → sign-up or signup.
Think of this sentence:
Sign up for the sign-up process.
The first expression describes an action. The second describes a thing or process.
Another quick test is to ask:
Can I replace it with “register”?
If yes, and the word describes the action, you probably need sign up:
I want to sign up.
I want to register.
But:
The sign-up process is easy.
Here, sign-up names the process rather than describing the action.
FAQs
Is signup one word?
Yes. Signup is used as a one-word noun or adjective, especially in digital and business writing. However, sign-up is also used for these functions, depending on the style.
Is sign-up hyphenated?
It can be. Sign-up is commonly used as a hyphenated noun or adjective, while sign up is normally written as two words when it is a verb.
Which is correct: sign up or signup?
Both can be correct, but they usually have different grammatical roles. Sign up is the standard verb, while signup is used as a noun or adjective in some styles.
What is the difference between sign up and sign-up?
Sign up is a verb meaning to register or join. Sign-up is a noun or adjective referring to the registration process or something related to registration.
Should I write “signup” or “sign-up form”?
Both forms are used. Choose the style that fits your publication and use it consistently. Sign-up form is the traditional hyphenated form, while signup form is common in digital writing.
Is “sign-up” correct as a verb?
Usually, no. When telling someone to register, write sign up:
Please sign up today.
What is another way to say “sign up”?
Depending on the context, you can use register, join, enroll, subscribe, or create an account.
The Bottom Line
The easiest rule is to remember that sign up is the verb.
Sign up for the newsletter.
When the expression acts as a noun or adjective, you may see sign-up or signup, depending on the style being used.
The sign-up process is easy.
The signup page is ready.
So, when you are asking someone to register, sign up is the form to choose.
