underpay

verb2

1. •
   To pay (someone) less than the value of their work; to pay (someone) insufficiently.

   • In their Position Paper, respondents averred that they were underpaid their daily wage, overtime work pay and 13th month pay. — 2020
2. •
   To pay less than is due for (something).

   • The underpaid letter was returned to the sender.