This study investigates the influence of personality traits on payment method adoption and use. Mainly, this study focuses on consumers holding a bundle of payment methods at a particular time and using one from this “portfolio” for a transaction. This study begins with an exploratory trend analysis of the payment portfolios held by consumers using panel data for 2015-2020 of the Survey of Consumer Payment Choice (SCPC). The first ten portfolios cover about 70% of the sample population. The most popular payment portfolio includes cash, checks, money orders, debit cards, credit cards, and ACH transfers made online using bank account number. Mobile payments appear only in the third and fourth most popular portfolios, increasingly adopted in recent years. The portfolio comprising all payment methods, including cash, checks, money orders, debit cards, credit cards, prepaid cards, ACH transfers, and mobile payments, showed a significant jump in its adoption rate in 2020. A portfolio including only cash is the tenth most popular portfolio, and its adoption has also been rising.Next, a survey from the Understanding America Survey (UAS) panel is linked to the SCPC to examine the influence of personality traits on payment behavior. Multinomial logit analyses are used for this purpose. Although the effects are small in magnitude, traits like Extroversion, Openness to Experience, Conscientiousness, and Neuroticism significantly influence payment behavior. Extroversion and Openness to Experience are positively associated with adopting portfolios that include mobile payments at the adoption stage. At the use stage, Conscientiousness increases the likelihood of using checks and money orders for in-person transactions and using ACH transfers for online transactions. Neuroticism is positively associated with using credit cards, checks, and money orders for in-person transactions. Openness to Experience positively influences the likelihood of using all types of cards, checks, and money orders but negatively influences the use of ACH transfers for online transactions. Like previous researchers, this study finds that demographic characteristics largely govern payment behavior followed by payment method attributes, e.g., cost, convenience, and security. Further, in-depth knowledge about personality traits associated with payment behavior has important implications for the payments industry, policymakers, and financial advisors.