If someone has done something for you, pay them what you agreed upon.
1 Timothy 5:18, For the scripture saith, Thou shalt not muzzle the ox that treadeth out the corn. And, The labourer is worthy of his reward.
On a couple of occasions, when I was running my own business, I had people to tell me after I finished the work, “Can I wait to pay you….?” I don’t believe anyone would mind it if the customer set that up prior to starting the job because then they know what to expect. I know I didn’t. But to wait until you finish the job to ask, now that’s just rude and disrespectful.
Friend, the Word of God speaks a lot about taking care of your responsibilities. It even speaks of the responsibility of paying those you have hired to do a job. So, be respectful and responsible and honor the Lord in your business dealings by paying the people you owe.