Soldier of The Cross, you have always heard that you can't outgive God.
How is that reflected in your life?
The bottom line of course is, the money is not yours, but is His to begin with. The issue is, do you believe you're commanded to give? To tithe?
Many preachers love to say that you do not need to tithe. That the New Testament does not address a tithe. That is not correct, and in fact there is a New Testament reference to tithing.
The New Testament issue is giving above what you think you can afford.
Soldier, did you earn the money, or does He give Daily Bread by Prayer and by Grace? Are you flying solo?
There are promises.
The issue is not what you can get - the issue is obedience.
There is a serious pull when it comes to money. Give God what He has asked before giving or paying anywhere else. You will see that every bill is paid and there will be an overflow.
Tell Him aloud. Today.