Missouri Revised Statutes Title XXXIV. Juries § 494.455. Compensation of jurors, mileage--additional compensation may be authorized, when

1. Each county or city not within a county may elect to compensate its jurors pursuant to subsection 2 of this section except as otherwise provided in subsection 3 of this section.

2. Each grand and petit juror shall receive six dollars per day, for every day he or she may actually serve as such, and seven cents for every mile he or she may necessarily travel going from his or her place of residence to the courthouse and returning, to be paid from funds of the county or a city not within a county. The governing body of each county or a city not within a county may authorize additional daily compensation and mileage allowance for jurors, which additional compensation shall be paid from the funds of the county or a city not within a county. The governing body of each county or a city not within a county may authorize additional daily compensation and mileage allowance for jurors attending a coroner's inquest. Jurors may receive the additional compensation and mileage allowance authorized by this subsection only if the governing body of the county or the city not within a county authorizes the additional compensation. The provisions of this subsection authorizing additional compensation shall terminate upon the issuance of a mandate by the Missouri supreme court which results in the state of Missouri being obligated or required to pay any such additional compensation even if such additional compensation is formally approved or authorized by the governing body of a county or a city not within a county. Provided that a county or a city not within a county authorizes daily compensation payable from county or city funds for jurors who serve in that county pursuant to this subsection in the amount of at least six dollars per day in addition to the amount required by this subsection, a person shall receive an additional six dollars per day to be reimbursed by the state of Missouri so that the total compensation payable shall be at least eighteen dollars, plus mileage for each day that the person actually serves as a petit juror in a particular case; or for each day that a person actually serves as a grand juror during a term of a grand jury. The state shall reimburse the county for six dollars of the additional juror compensation provided by this subsection.

3. In any county of the first classification without a charter form of government and with a population of at least two hundred thousand inhabitants, no grand or petit juror shall receive compensation for the first two days of service, but shall receive fifty dollars per day for the third day and each subsequent day he or she may actually serve as such, and seven cents for every mile he or she may necessarily travel going from his or her place of residence to the courthouse and returning, to be paid from funds of the county.

4. When each panel of jurors summoned and attending court has completed its service, the board of jury commissioners shall cause to be submitted to the governing body of the county or a city not within a county a statement of fees earned by each juror. Within thirty days of the submission of the statement of fees, the governing body shall cause payment to be made to those jurors summoned the fees earned during their service as jurors.