worthwhile
adjective UK /ˌwɜːθˈwaɪl/ US /ˌwɝːθ-/
B2 useful, important, or good enough to be a suitable reward for the money or time spent or the effort made:
She considers teaching a worthwhile career.
The time and expense involved in keeping up to date with all the changes has been worthwhile.
If you need him on this project, you've got to make it financially worthwhile for him (= you will have to pay him a suitable amount of money for the amount of work involved).