Answered by Shaykh Faraz Rabbani
Outside the month of Ramadan I intended to keep a make up fast before going to bed. On waking I had sexual relations with my wife as I was wavering at the that time whether I had fulfilled the intention. Looking back, I did have the intention. Please advise me whether I need to pay kafara.
Walaikum assalam wa rahmatullah,
I pray that this finds you well, and in the best of health and spirits. May Allah grant you all good and success in this life and the next.
Invalidating fasts outside of the month of Ramadan–whether a make up or recommended fast–does not requier expiation (kaffara). However, breaking make up fasts without an overwhelming excuse is sinful.
[ Ibn Abidin, Radd al-Muhtar ]
And Allah alone gives success.
Faraz Rabbani