semi-annually vs semiannually

Both "semi-annually" and "semiannually" are correct, but "semiannually" is more commonly used. The difference lies in whether a hyphen is used between "semi" and "annually."

Last updated: March 27, 2024 • 1368 views

This phrase is correct and commonly used in English.

"semi-annually"

This phrase means occurring twice a year, every six months. It is used in financial contexts, reports, and schedules.

Examples:

The interest on the loan is compounded semi-annually.
The company reports its earnings semi-annually.

Show examples from the web [+]

The incentive fee shall be paid semi-annually in arrears.
The report first assesses the state of financial integration, based on a set of indicators that are also published semi-annually on the ECB's website.
the indicators are updated semi-annually on the ECB's website.
The Kingdom of Denmark will report semi-annually to the Commission on the evolution of the Restructuring Plan and the above mentioned commitments until the end of the Restructuring Period.
Semi-annually, after the first year.
Liver function tests are recommended before initiation, every 6 to 12 weeks for the first year, and periodically (e. g. semi-annually) thereafter.
The Council shall convene semi-annually and its meetings shall take place at the seat of the Agency, unless the Council decides otherwise.
The frequency of reporting should be semi annually initially, but may be varied depending on the results obtained.
the issuer makes the information referred to in point (a) available to the institution at least semi annually.

Alternatives:

twice a year
every six months
biannually
every half year
every half-yearly

This phrase is correct and commonly used in English.

"semiannually"

This phrase also means occurring twice a year, every six months. It is more commonly used than "semi-annually" and is preferred in many style guides.

Examples:

The interest on the loan is compounded semiannually.
The company reports its earnings semiannually.

Show examples from the web [+]

That would be consistent with the maintenance injections required semiannually.
Because you see, a few months ago, I was having my semiannual haircut...
Chatswin High school's first semiannual "Florida Clarisonic face brush fund-raiser."
I've got three months of personnel status records to release, a roomful of PIls that need to be declassified and destroyed, not to mention the quarterly training reviews that are about to become semiannual if I don't finish them.

Alternatives:

twice a year
every six months
biannually
every half year
every half-yearly

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semi-annually vs semiannually

"semi-annually"

"semiannually"

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