The Three Phases Explained
Every body composition goal falls into one of three phases:
- Cutting: Eating below TDEE to lose fat while preserving muscle. Deficit: 300-500 calories below TDEE.
- Bulking: Eating above TDEE to gain muscle (and some fat). Surplus: 200-300 calories above TDEE for a lean bulk.
- Maintenance: Eating at TDEE to maintain current weight and body composition.
Cutting: The Fat Loss Phase
A cut is a dedicated fat loss phase lasting 8-16 weeks. The goal is to reduce body fat while preserving as much muscle as possible. Key rules for a successful cut: maintain a moderate deficit (300-500 cal), keep protein high (1.0g/lb bodyweight), continue resistance training at full intensity, prioritize sleep, and plan a definitive end date.
Bulking: The Muscle Gain Phase
A bulk is a dedicated muscle-building phase lasting 12-20 weeks. You intentionally eat above maintenance to provide the energy surplus needed for muscle growth. Lean bulking (200-300 cal surplus) is preferred over aggressive bulking (500+ surplus) because excess calories beyond what muscle growth requires simply become body fat.
Should You Cut or Bulk First?
A simple rule of thumb: if your body fat is above 20% (men) or 30% (women), cut first. Getting lean before bulking gives you better nutrient partitioning (more calories directed to muscle rather than fat), clearer visual feedback on progress, and a longer productive bulking phase before needing to cut again.
If your body fat is already in a healthy range and you are a beginner, you may be able to achieve body recomposition - losing fat and gaining muscle simultaneously - without dedicated cut/bulk phases. Use our Body Recomp Calculator to see if this approach is right for you.
Calculate Your Phase
Start by determining your current body fat with our Body Fat Calculator. Then use our Calorie Deficit Calculator for cutting or our Macro Calculator for bulking to get precise daily targets.
