The correct spelling is occurring, with two r’s at the end of the word’s root before the -ing ending. Occuring is a common spelling mistake and is not accepted as the standard spelling in English. Both forms may look similar, but only occurring is correct in formal writing, school assignments, professional emails, and everyday communication.
Words with repeated letters can be confusing, especially when adding endings such as -ing. The verb occur follows a spelling rule that requires doubling the final consonant when adding -ing. Understanding this rule will help you spell occurring correctly and avoid similar mistakes with words such as beginning, running, and referring.
Quick Answer
Occurring is the correct spelling, while occuring is incorrect. The word occurring is the present participle of occur and means happening or taking place. When adding -ing to occur, double the final letter r to form occurring. Always use occurring in formal and informal English.
Why Do People Confuse Occurring and Occuring?
People often confuse these spellings because English does not always make spelling rules obvious. When adding -ing to a verb, the final consonant sometimes doubles, but not in every word.
The verb occur ends in a consonant-vowel-consonant pattern in its final syllable, with the final r following a vowel sound. Therefore, the final consonant is doubled before adding -ing.
- Correct: occurring
- Incorrect: occuring
The extra r is easy to overlook when typing quickly, writing from memory, or relying on pronunciation alone.
First Word: Occurring
Occurring is the correct spelling of the word. It comes from the verb occur, which means to happen, take place, or exist in a particular situation.
Meaning of Occurring
The word occurring describes an event, action, or situation that is happening or taking place.
Examples:
- An unusual problem is occurring in the system.
- Heavy rainfall is occurring across the region.
- The same mistake is occurring repeatedly.
When to Use Occurring
Use occurring when describing something that is happening now, happening repeatedly, or taking place under particular circumstances.
For example: “Technical issues are occurring during the update.”
Second Word: Occuring
Occuring is an incorrect spelling of occurring. It results from leaving out one of the two r’s required by the standard spelling rule.
Is Occuring Ever Correct?
No. In standard modern English, occuring is a misspelling, not an accepted alternative spelling.
Incorrect: “The error is occuring again.”
Correct: “The error is occurring again.”
If you see occuring in a document, essay, message, or online article, it should generally be corrected to occurring.
Occurring vs. Occuring: Comparison Table
| Feature | Occurring | Occuring |
| Spelling status | Correct | Incorrect |
| Number of r’s at the end of the root | Two | One |
| Meaning | Happening or taking place | No separate standard meaning |
| Suitable for formal writing | Yes | No |
| Accepted in standard English | Yes | No |
| Example | An event is occurring. | An event is occuring. |
When to Use Each Spelling
Use Occurring
Use occurring in all contexts where you mean that something is happening or taking place.
Examples:
- “The changes are occurring gradually.”
- “A similar problem is occurring in other departments.”
- “The event is occurring earlier than expected.”
Avoid Occuring
Do not use occuring in essays, reports, business documents, emails, or other writing. Although readers may understand what you mean, the spelling is incorrect.
12 Examples of Occurring in Sentences
Here are 12 examples that show how to use occurring correctly.
- A strange noise is occurring inside the machine.
- The same error is occurring every morning.
- Several changes are occurring in the company.
- Heavy storms are occurring across the coastal region.
- The problem is occurring more frequently than before.
- These events are occurring at the same time.
- A chemical reaction is occurring inside the container.
- The delay is occurring because of technical difficulties.
- Similar incidents are occurring in nearby towns.
- The discussion is occurring in the main conference room.
- Unexpected changes are occurring during the experiment.
- The issue is occurring only on older devices.
Each sentence uses occurring with the correct spelling.
Common Mistakes With Occurring vs. Occuring
The most common mistake is writing occuring with only one r. Here are a few other errors worth avoiding.
- Occuring: Incorrect; the final r has not been doubled.
- Occurrying: Incorrect; the word does not take an extra y.
- Occured: Incorrect; the past-tense form is occurred.
- Occurrance: Incorrect; the noun is occurrence.
Remember that the correct forms are occur, occurs, occurred, occurring, and occurrence.
Memory Trick: How to Remember Occurring
A simple way to remember the spelling is to think:
Occur + ring = occurring.
The word occur already ends in r. When you add -ing, double that final r:
OCCUR + ING → OCCURRING
Another helpful trick is to remember that occurred and occurring both have a double r. This connection makes it easier to remember the spelling of both forms.
American vs. British English
There is no spelling difference between American and British English for this word.
| English variety | Correct spelling |
| American English | Occurring |
| British English | Occurring |
| Canadian English | Occurring |
| Australian English | Occurring |
Both American and British writers use occurring. The spelling occuring is incorrect in these varieties of standard English.
Similar Words With Double Letters
Learning related words can help you understand the spelling pattern.
| Base word | Correct form | Common mistake |
| Occur | Occurring | Occuring |
| Refer | Referring | Refering |
| Begin | Beginning | Begining |
| Run | Running | Runing |
| Admit | Admitting | Admiting |
| Prefer | Preferring | Prefering |
In these examples, the final consonant is doubled before adding -ing. Learning the pattern can help you avoid similar spelling mistakes.
Final Verdict: Occurring or Occuring?
Occurring is always the correct choice in standard English. It means happening or taking place and is used in everyday conversation, academic writing, business communication, and professional documents.
Occuring is a misspelling that should be avoided. When adding -ing to occur, remember to double the final r. This small spelling detail makes your writing clearer and more accurate.
FAQs:
1. Is occurring or occuring correct?
Occurring is correct. The word requires two r’s before the -ing ending. Occuring is a misspelling.
2. Why does occurring have two r’s?
The final consonant of occur is doubled before adding -ing. This follows the English spelling pattern used in words such as running and referring.
3. What does occurring mean?
Occurring means happening, taking place, or existing in a particular situation. For example, “The problem is occurring again.”
4. Is occuring a real word?
Occuring may appear in informal writing or online text, but it is not a correct standard English spelling. The correct form is occurring.
5. What is the past tense of occur?
The past tense of occur is occurred, with two r’s. For example: “The accident occurred yesterday.”
6. What is the noun form of occurring?
The related noun is occurrence, meaning an event or something that happens. For example: “Power outages are a frequent occurrence in the area.”
7. Do Americans and British people spell occurring differently?
No. Both American and British English use occurring. There is no regional spelling variation for this word.
Remember This
- Correct: Occurring
- Incorrect: Occuring
- Meaning: Happening or taking place
- Past tense: Occurred
- Noun: Occurrence
The key is to double the final r when spelling occurring.
Conclusion
The difference between occurring and occuring is just one letter, but that letter matters. Occurring is the correct spelling in standard English because the final r in occur doubles before the -ing ending. The incorrect form occuring should not be used in formal or informal writing.
Whenever you are unsure, remember the related forms occurred and occurrence. Practicing these words in sentences will help you recognize their correct spellings naturally. With this simple rule in mind, you can write occurring confidently in schoolwork, emails, reports, and everyday communication.
