Different part of speech:

talu = verbnoun "pay"

tâl = noun "pay"

So:

Pryd wyt ti'n cael dy dalu? "When do you get paid / When are you paid?"

Pryd wyt ti'n cael dy dâl? "When do you get your pay?"

"When will you be paid?" is looking for an answer in the future i.e "I'll be paid next Tuesday" and in Welsh this is "Pryd byddi di'n cael dy dalu?" and is answered with "Bydda i'n cael fy nhalu dydd Mawrth nesa(f)." "When do you get paid?" is general and would be answered "I get paid on Tuesday" which in Welsh becomes "Pryd wyt ti'n cael dy dalu?" and is answered with "Dw i'n cael fy nhalu ar ddydd Mawrth".