It is all depends on the scale. Therefore, if the good deeds over weighs the bad deeds, one will be in Paradise. But if the bad deeds overweighs the good deeds, he is in trouble.

Of course, there is the mercy of Allah and there is the intercession of the Prophet salla Allahu alaihi wa sallam and the righteous.

If you die firmly believing in ALLAH and making shahadah and you were sincere in all the hasana you did throughout your life but your bad deeds outweigh your good what will happen to that person on the Day of Judgement?