Lying is a serious offense and breach of values. Depending on the circumstances you could be looking at full punishment under the UCMJ.
If it is a Summary Article 15- 14 days restriction, 14 extra duty.
If you are getting a company grade Article 15 it would be loss of 1 grade, loss of 7 days pay, 14 days restriction, 14 extra duty.
I believe most leaders see lying as a serious issue, they usually will not go easy in these cases. I would highly encourage you to be well prepared and be able to explain yourself and actions.
You might find this post useful: