paid / payed are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
paid: (verb) give money, usually in exchange for goods or services. (verb) do or give something to somebody in return. (verb) be worth it. (verb) render. (verb) bear (a cost or penalty), in recompense for some action. (verb) make a compensation for. (verb) discharge or settle. (adjective) marked by the reception of pay.
payed: (verb) give money, usually in exchange for goods or services. (verb) do or give something to somebody in return. (verb) be worth it. (verb) render. (verb) bear (a cost or penalty), in recompense for some action. (verb) make a compensation for. (verb) discharge or settle.
paid: p·EY·d
payed: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)