We study consumption spending responses to predictable income using household-level data from a U.S. financial institution. Even for households with large liquid asset balances, we find no spending in anticipation of income receipt, substantial spending following receipt, and significant front-loading with respect to date of receipt. To rationalize these findings, we develop a tractable model of mental accounts where consumption choices are partitioned across current income and current assets. Our model reproduces the timing, magnitude, and cross-section of consumption responses observed in the data. Finally, we use the model to study the effectiveness of targeted and untargeted fiscal stimulus policies.