Intending to Break the Fast
Question :

If somebody was fasting and intended to break his fast – for example if somebody decided that he cannot continue the fast and poured some water to drink – but then changed his mind and decided to fast again, is his fast still valid or not?

Answer :

If he broke the intention of fasting and decided to break the fast, even if he did not actually break it, his fast is void and he has to make it up. However, he should still refrain from the things that break the fast – such as eating and drinking – for the rest of that day.
He does not have to pay kaffara.