Annual or Anual: Which Spelling Is Correct?

Unlike a pair of two valid words, annual and anual are not both correct: annual is the standard spelling with a double n, and anual is a misspelling. Something annual happens once a year, "an annual report," "the annual festival," "she gets an annual checkup." The related noun is annuity, and the whole family keeps two n's. The wrong version, anual, drops the second n, an easy slip because you only pronounce one n when you say the word aloud. That gap between sound and spelling places anual vs annual among the commonly confused words where a doubled letter is silent to the ear. This guide explains why the word is annual, where the double n comes from, why anual keeps tempting people, and a reliable way to keep the spelling right.

Which One Is Correct?

There is a clear answer: annual is correct, and anual is not. Merriam-Webster, Oxford, and Cambridge all list annual as the standard spelling for the adjective and the noun, along with annually, annuity, and the rest of the family. Anual appears in none of them.

If you want the word that means happening once a year or measured over a year, you want annual, with two n's. "The company holds an annual meeting." "Her annual salary rose this year." "We mark the date annually." There is no context in standard English where anual is the right choice.

The practical rule of thumb is short: a year has two n's in Latin, so annual has two n's in English. Whenever you write the word, or any of its relatives, double the n. The same holds for every derived form, so annually, annualized, and annualize all carry the two n's without exception. Because anual is not a stylistic variant but an outright error, keeping the double n is all you need to get it right every time.

Where Annual Comes From

Understanding the word's roots makes the double n feel logical rather than arbitrary. Annual comes, through Old French, from the Latin annualis, which is built on annus, the Latin word for "year." And here is the key fact: annus itself has a double n. English did not invent the second n; it inherited it directly from the source word. So the spelling annual simply preserves the two n's that were there in Latin all along.

Because the double n lives in the root, it shows up in every relative that grows from annus:

• annual — happening once a year
• annually — every year
• annuity — a yearly payment
• anniversary — a yearly return of a date
• biannual — twice a year, or every two years
• perennial — lasting through the years
• annals — a yearly record of events

Every one of these keeps the double n, because every one of them is built on annus, the two-n word for "year." Once you see the whole family lined up, the second n in annual looks exactly where it belongs, and dropping it would break the pattern that runs through anniversary and perennial alike.

Why People Write Anual

If annual is the only correct form, why does anual keep appearing? The confusion has a few understandable sources.

The biggest is that the double n is silent to the ear. When you say annual, you pronounce a single n sound, "AN-yoo-uhl", so nothing in the pronunciation tells you there are two n's. Writers who spell by ear naturally reach for one n, since that is what they hear. The doubled letter is a fact of spelling, not of sound, which makes it easy to miss.

A second cause is influence from other languages. In several languages, including Spanish and Portuguese, the everyday word for yearly is spelled anual, with a single n. Multilingual writers and speakers carry that single-n habit into English, where it becomes an error. English is the one that doubles the n here, following the Latin root closely.

A third factor is general uncertainty about doubled consonants, the same doubt that surrounds words like occurring vs occuring, where writers are unsure whether to double a letter, and possess vs posses, where getting the count of a repeated letter right is the whole challenge. With annual, the rule points firmly toward doubling: the year-word carries two n's, so the word for yearly does too.

Examples in Sentences

Seeing the correct spelling in context, next to the error, makes the double n stick.

Correct uses of annual:

• The charity publishes an annual report each spring.
• His annual physical is scheduled for next week.
• Members pay an annual fee to renew.
• Sales grow at a steady annual rate.

Wrong to right corrections:

• We attend the anual conference every fall. to We attend the annual conference every fall.
• Her anual bonus was higher this year. to Her annual bonus was higher this year.
• They review the budget anually. to They review the budget annually.

In every correction the fix is the same: the single-n anual becomes the double-n annual, matching the Latin annus and the whole family of yearly words.

Annual vs Anual: Side by Side

The table sets the correct spelling against the error.

Aspect	Annual	Anual
Status	correct, standard	misspelling
Number of n's	two	one (wrong here)
From	Latin annus (year), annualis	dropped n, or another language
Family	annuity, anniversary, perennial	not accepted
Sound clue	none (only one n is heard)	matches the sound, still wrong
Use it?	always	never

The key row is "number of n's": annual takes two n's because its Latin root annus has two n's, while anual drops one by spelling from sound. Keep the double n and the word is always right.

How to Remember

The cleanest trick ties the spelling to the meaning. Annual is about a year, and the Latin word for year, annus, has two n's, so annual has two n's. Fix the little chain in memory: year, annus, two n's, annual. If you can recall that the source word doubles the n, you will double it too.

A second cue uses the most familiar relative. Nobody writes aniversary with one n, everyone spells it anniversary, with the double n clearly in place. Since annual and anniversary grow from the same year-word, they share the same double n. If anniversary keeps two, so does annual.

A third cue is to watch for language interference. If you know a language where the word is anual, treat English as the exception that doubles the n, and check the count before you write. Anchor annual to annus and anniversary, mind the doubled consonant the way occurring vs occuring and possess vs posses both hinge on getting a repeated letter right, and you will spell it correctly every time.

Related Spelling Mixups

Annual vs anual is one of many English pairs where a doubled consonant is silent to the ear, so the whole spelling comes down to remembering the double letter. If this pair tripped you up, a few neighbors are worth a look. The pair occurring vs occuring turns on the same instinct, deciding to double a consonant that the pronunciation does not force. The pair possess vs posses is a close cousin, where the challenge is remembering exactly how many of a repeated letter the word needs. You can also compare the letter-count question in habbit vs habit, which runs the opposite way and warns against doubling. Each of these lives in the same commonly confused words collection, and each rewards the same habit: learn the letter count from the word's roots and stop spelling by ear.

Conclusion

Annual is the correct spelling, with a double n, and anual, with a single n, is a misspelling. The word comes from the Latin annus, "year", which itself carries a double n, and English preserved it when it built annualis into annual. That double n runs through the entire family: annuity, anniversary, biannual, perennial, and annals all keep two n's, because all of them grow from the two-n year-word. People write anual because the second n is silent when the word is spoken, because several other languages spell it with one n, and because doubled consonants breed general uncertainty. The remedy is a single anchor: a year (annus) has two n's, and so does annual, just as anniversary does. For more pairs where a silent doubled letter decides the spelling, browse the full collection of commonly confused words.