While Las Vegas oddsmakers take bets on non-sporting events, a search of Google won't tell you that the odds of a 12.4% payroll tax hike on high-income earners in 2021 are incredibly high, according to tax and financial experts. Vegas odds on the likelihood of a massive expansion of the estate tax to millions of families are also not readily available, but an overwhelming majority of financial professionals are predicting the estate taxed will be slashed as of January 1, 2021.