I’ve heard a lot of evangelists proclaim that Jesus died for all our sins, past, present, and future. This is true, but those evangelists often neglect to explain God’s full plan for forgiveness and tell you the whole truth.
Our past sins are forgiven at baptism. It’s more than just a figurative ritual. With belief you truly are washed in Jesus’ blood at baptism. At baptism with belief and repentance you are washed in the blood and become a member of God’s family.
After baptism the idea is to walk in the light and quit sinning. Future sins should they happen are only forgiven by the act of confession. 1 John 1:9
Proverbs 28:13 KJV says, He that covereth his sins shall not prosper: but whoso confesseth and forsaketh them shall have mercy.