### Question
How does the law define semimonthly period?


### Answer
Under *26 CFR § 40.0-1*, **semimonthly period** is defined as:

> the first 15 days of a calendar month (the "first semimonthly period") or the portion of a calendar month following the 15th day of the month (the "second semimonthly period")

#### Citation:
  - *26 CFR § 40.0-1*
  - Heading: **PART 40—EXCISE TAX PROCEDURAL REGULATIONS > SUBCHAPTER D—MISCELLANEOUS EXCISE TAXES > SUBCHAPTER D—MISCELLANEOUS EXCISE TAXES**

