Startup or Start-Up: Which Is Correct (2026)?

Startup and start-up are both correct, but they are used a little differently. When you mean a new business, you can write startup or start-up, depending on the style you follow. Start up, however, is different: it is a verb phrase. Once you know whether you are naming a business or describing an action, the spelling becomes much easier to choose.

Quick Answer:

Use startup or start-up as a noun for a new business:

She founded a tech startup.

The company needed more start-up capital.

Use start up as a verb when something begins operating:

They will start up the new system.

Startup/start-up = noun
Start up = verb

Startup vs. Start-Up

What Do “Startup” and “Start-Up” Mean?

As a noun, startup or start-up refers to a newly established business, often one developing a product, service, or new market.

The startup is building a new payment app.

The two noun forms have essentially the same meaning. The main difference is the spelling style being used.

The words can also work as adjectives in expressions such as startup costs and start-up capital.

Why Are There Two Spellings?

Start-up is the traditional hyphenated form, while startup has become widely established as a closed compound.

That means you may see both forms in reliable English writing. Different publications and style guides make different choices, so consistency matters more than trying to treat one spelling as universally wrong.

When to Use Each

Use startup when you want the common modern closed form, especially in general US business and technology writing.

Use start-up when the style you are following prefers the hyphen:

The company faced high start-up costs.

Use start up when the words form a verb phrase:

The system will start up automatically.

Common Mistakes

Using “start up” for a business

❌ She founded a start up.
✅ She founded a startup.

Writing “startup” as a verb

❌ They will startup the machine.
✅ They will start up the machine.

Assuming the hyphenated noun is wrong

❌ The company needs more start-up capital.
✅ The company needs more start-up capital.

The hyphenated form is still valid.

Pronunciation

Startup, start-up, and start up are normally pronounced the same. The difference is mainly grammatical and written.

Six Examples

1. She founded a technology startup with two partners.
2. The startup develops software for small businesses.
3. The founders needed more start-up capital.
4. High start-up costs can be difficult for a new business.
5. The company plans to start up operations next month.
6. He works for a successful software startup.

Easy Memory Trick

Think about what the expression is doing:

Startup / start-up = business or business-related term
Start up = action

Mini Quiz

1. Which sentence is correct?
A. She founded a startup.
B. She founded a start up.
C. She founded a started-up.
D. She founded an starting up.

2. Which form is the verb phrase?
A. Startup
B. Start-up
C. Start up
D. Startupp

3. Complete the sentence: “The company needs more □ capital.”
A. startup
B. start-up
C. start up
D. started up

4. Which sentence uses “startup” as a noun?
A. They will startup the machine.
B. She joined a healthcare startup.
C. The machine will startup soon.
D. They startup the system daily.

5. What mainly determines the choice between “startup” and “start-up”?
A. Pronunciation
B. Style preference
C. Sentence length
D. Number of syllables

Answers: 1-A, 2-C, 3-B, 4-B, 5-B

FAQs

Is “startup” or “start-up” correct?

Both are accepted noun forms. Startup is widely used in modern writing, while start-up remains an established spelling.

Is “start up” also correct?

Yes. Start up is a verb phrase meaning to begin operating or cause something to operate.

Which spelling is common in American English?

Startup is a common modern choice in US business and technology writing, although start-up is also valid.

Should I write “startup costs” or “start-up costs”?

Both styles are used. Follow the style guide or publication you are writing for and use one form consistently.

Conclusion

Startup and start-up are both correct as nouns, while start up is the verb phrase. For modern US business writing, startup is a natural choice, but start-up remains valid. The easiest rule is startup/start-up = term; start up = action.

Bryan Garne

Bryan Garner an experienced English language writer specializing in grammar, usage, word choice, and clear American English. He focuses on making complex language rules simple, accurate, and practical.