Romans 6:23 (KJV)
23 For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord.
It means hence, what a man earns or deserves; what is his proper pay, or what he merits. As applied to sin, it means that death is what sin deserves; what will be its proper reward. Death is thus called the wages of sin, not because it is an arbitrary, undeserved appointment, but
Because it is its proper desert.
(For the wages of sin)