Breaking promise

[kayd21]

Hello,

I am trying to figure out if it would be considered a mortal sin to break a promise to another person. Would the promise need to be grave matter in order for it to be a grave sin?

 

[pianistclare]

Not enough info. Promises are not sinful either way. But what you failed to do could be an occasion of sin.
Ask your priest, giving more details.

 

[1Lord1Faith]

Would the promise need to be grave matter in order for it to be a grave sin?

That seems like a good starting point.

Things not to consider are whether or not it’s a pinkie promise, or whether you had your fingers crossed when you made the promise. Another point to avoid thinking about is in regards to how long the sound of the O in promise was drawn out when you said it, like “I proooomise”.