When it was nothing.
When I started my career, there was this Client and he asked me how much for a plugin installation? I said it would be 10$ per plugin. I thought it would be a drop in replacement but it was full of instruction. After a whole day work, I still charged him 10$. He was surprised and said he wouldn’t mind give me more money and I said no – lets stick to the amount we decided.
When it costed a lot.
I agreed to have my professional fee constant till April (for two years) Company made good amount of money and my partner offered me to take the early increment. I said no – Imagine the increment delayed for 6 months – It was huge pain considering I was living hand to mouth.