Raw Marinated Chicken can stay in the refrigerator safely for 2 days and you can make the marinating process happen faster by cutting the chicken into small pieces so the chicken will absorb the marinade faster and easier.
Cooked Marinated Chicken will safely last up to 5 days in the refrigerator and up to 6 months in the freezer.
If you plan to keep the marinated chicken longer than 5 days then freeze it to make it last longer.