Mo. Rev. Stat. § 288.036
1. "Wages" means all remuneration, payable or paid, for personal services including commissions and bonuses and, except as provided in subdivision (8) of this section, the cash value of all remuneration paid in any medium other than cash. Gratuities, including tips received from persons other than the employing unit, shall be considered wages only if required to be reported as wages pursuant to the Federal Unemployment Tax Act, 26 U.S.C. Sec. 3306, and shall be, for the purposes of this chapter, treated as having been paid by the employing unit. Severance pay shall be considered as wages to the extent required pursuant to the Federal Unemployment Tax Act, 26 U.S.C. Section 3306(b). Vacation pay and holiday pay shall be considered as wages for the week with respect to which it is payable. The term "wages" shall not include:
(1) For the purposes of determining the amount of contributions due and contribution rates, that part of the remuneration for employment paid to an individual by an employer or the employer's predecessors which is in excess of seven thousand dollars for the calendar years 1988 through 1992, seven thousand five hundred dollars for the calendar year 1993, eight thousand five hundred dollars for the calendar years 1994, 1995 and 1996, eight thousand dollars for calendar year 1997, and eight thousand five hundred dollars for the calendar year 1998, and the state taxable wage base as determined in subsection 2 of this section for calendar year 1999, and each calendar year thereafter, unless that part of the remuneration is subject to a tax pursuant to a federal law imposing a tax against which credit may be taken for contributions required to be paid into a state unemployment fund; except that:
(2) The amount of any payment made (including any amount paid by an employing unit for insurance or annuities, or into a fund, to provide for any such payment) to, or on behalf of, an individual under a plan or system established by an employing unit which makes provision generally for individuals performing services for it or for a class or classes of such individuals, on account of:
(4) The amount of any payment made by an employing unit to, or on behalf of, an individual performing services for it or his or her beneficiary:
2. The increases or decreases to the state taxable wage base for calendar year 1999, and each calendar year thereafter, shall be determined by the provisions within this subsection. The state taxable wage base for calendar year 1999, and each calendar year thereafter, shall be determined by the preceding September thirtieth balance of the unemployment compensation trust fund, less any outstanding federal Title XII advances received pursuant to section 288.330. When the September thirtieth unemployment compensation trust fund balance, less any outstanding federal Title XII advances received pursuant to section 288.330, is:
(2) Four hundred fifty million or more, then the state taxable wage base for the subsequent calendar year shall be decreased by five hundred dollars. In no event, however, shall the state taxable wage base increase beyond ten thousand five hundred dollars, or decrease to less than seven thousand dollars.
For any calendar year, the state taxable wage base shall not be reduced to less than that part of the remuneration which is subject to a tax under a federal law imposing a tax against which credit may be taken for contributions required to be paid into a state unemployment compensation trust fund.
(L. 1951 p. 564 § 288.030, A.L. 1957 p. 531 § 288.037, A.L. 1965 p. 420, A.L. 1972 S.B. 474, A.L. 1975 S.B. 325, A.L. 1977 H.B. 707, A.L. 1979 S.B. 477, A.L. 1984 H.B. 1251 & 1549, A.L. 1986 H.B. 1577, A.L. 1988 H.B. 1485, A.L. 1993 H.B. 502, A.L. 1994 S.B. 593, A.L. 1995 H.B. 300 & 95, A.L. 1996 H.B. 1368, A.L. 1997 H.B. 472)
(1993) Federally mandated payments made pursuant to federal Worker Adjustment and Retraining Notification Act (WARN) are not considered termination or severance pay and are fully deductible from Missouri unemployment benefits. Labor and Industrial Relations Commission v. Division of Employment Security, 856 S.W.2d 376 (Mo. App. E.D.).