If jesus did nto pay for future sin, You better never sin again, Because once you do. there is no more payment for sin. Your under law. and according to the law. Guilty and cursed.
This is a distortion of the truth. Do you confess your sins and ask forgiveness? If so, why? If all future sins were covered when you repented and called on the Lord, why keep on confessing? Why ask forgiveness? And if you don't confess your sins and ask forgiveness, why do you disobey the truth of the gospel?
His death on the cross was sufficient to pay the penalty for sin, but we don't get a free pass for all future sins by simply repenting once then forgetting we're still sinners. I can hear it already and no, this isn't "works based" salvation; it's faith based salvation.