Macro Split For Cutting And Bulking (Real Numbers 2026)
Protein, carbs, and fat targets for fat loss or muscle gain, with example day plans for 180lb training.
Step 1: Calories First, Then Macros
Always set total daily calories first based on your TDEE and goal:
- Cutting (fat loss): TDEE − 15% to 25%
- Maintenance: TDEE
- Bulking (muscle gain): TDEE + 10% to 20%
Only then split those calories into macros. Macro ratios without a calorie anchor are meaningless.
Step 2: Protein Is Non-Negotiable
Protein targets are absolute, not a percentage of calories:
- Cutting: 1.0–1.2g per lb body weight (2.2–2.6g/kg). Preserves muscle in deficit.
- Maintenance: 0.7–1.0g/lb (1.5–2.2g/kg).
- Bulking: 0.8–1.0g/lb (1.6–2.2g/kg). More doesn't help muscle growth.
Example: 180lb man cutting = 180–216g protein/day. That's 720–864 protein calories, before distributing carbs and fat.
Step 3: Fat Sets The Floor
Minimum fat intake for hormonal health: 0.3g per lb body weight (0.7g/kg). Below this for extended periods can drop testosterone, estrogen, and thyroid hormones.
Typical fat range:
- Cutting: 20–30% of calories
- Maintenance/bulking: 25–35% of calories
Example: 180lb man cutting on 2,000 cal with 200g protein. Floor fat: 54g (486 cal). Target fat 25%: 500 cal = 55g. Use 55g.
Step 4: Carbs Fill The Remainder
Once protein and fat are set, carbs take whatever calories are left.
Example continuing above: 2,000 calories total. Protein 200g = 800 cal. Fat 55g = 495 cal. Remainder = 705 cal = 176g carbs.
Final cutting macros: 200P / 176C / 55F on 2,000 calories.
Standard Splits By Goal
| Goal | Protein | Carbs | Fat |
|---|---|---|---|
| Cutting (standard) | 35–40% | 35–40% | 20–30% |
| Cutting (low-carb) | 35–40% | 20–25% | 35–45% |
| Maintenance | 25–30% | 40–50% | 25–30% |
| Lean bulk | 25–30% | 45–55% | 20–25% |
| Aggressive bulk | 20–25% | 50–60% | 20–25% |
These are percentages of total calories. The protein g/lb target overrides percentage if they conflict.
Cutting Macros: Example Day (180lb Man, 2,000 cal)
Target: 200P / 176C / 55F
- Breakfast: 4 eggs + 2 slices rye + black coffee. (32P / 35C / 20F)
- Lunch: 200g chicken breast + 150g rice + mixed veg + 1 tbsp olive oil. (55P / 55C / 16F)
- Snack: Greek yoghurt (200g) + banana + whey scoop. (45P / 40C / 2F)
- Dinner: 200g salmon + sweet potato (200g) + broccoli. (50P / 40C / 17F)
- Evening: Cottage cheese (150g). (18P / 6C / 2F)
Total: ~200P / 176C / 57F. Fills up the day with 5 meals, all real food.
Bulking Macros: Example Day (180lb Man, 2,800 cal)
Target: 180P / 370C / 75F (lean bulk)
- Breakfast: Oats (100g dry) + whey + banana + almond butter (1 tbsp). (45P / 85C / 15F)
- Lunch: Large burrito bowl: rice, chicken, beans, cheese, guacamole. (55P / 90C / 25F)
- Snack: Turkey sandwich + apple + Greek yoghurt. (30P / 70C / 8F)
- Post-workout: 2 scoops whey + rice cakes (4). (50P / 60C / 3F)
- Dinner: Steak (200g) + roasted potato (300g) + salad + olive oil. (50P / 60C / 25F)
Total: ~230P / 365C / 76F. Slightly over on protein is fine during bulk.
When Low-Carb Makes Sense
Low-carb (under 150g/day) can be superior for:
- People with strong carb-induced hunger patterns
- Diabetics or prediabetics (blood glucose control)
- Sedentary people (glycogen turnover is low anyway)
- Those who thrive psychologically on structured eliminations
Low-carb is not superior for muscle gain, athletic performance, or people with healthy blood sugar regulation. It's a tool, not a religion.
When Keto Is Useful (Very Narrow)
Keto (carbs below 50g/day, ~70% fat) is specifically helpful for:
- Drug-resistant epilepsy (originally medical)
- Some metabolic disease presentations
- People who prefer fat satiety and struggle with appetite otherwise
Keto is not required or superior for general fat loss. It just limits food choice, which for some people incidentally controls calories.
The Real Fiber Target
Often forgotten: fiber should be 10–14g per 1,000 calories eaten. On a 2,000 cal day, aim for 25–30g fiber. Higher fiber improves satiety, stabilises blood sugar, and supports gut health.
Most packaged "low-carb" diets fall short on fiber. Build in 2–3 servings of vegetables, 1 serving of berries, and whole-grain carb sources over refined ones.
Tracking vs Eyeballing
Macro tracking with MyFitnessPal / Cronometer / Lose It for 2–4 weeks teaches you portion sizes and protein content of common foods. After that, most people can "eyeball" accurately enough, tracking only occasionally.
Don't track forever — it promotes disordered relationships with food for some people. Use tracking as education, then graduate to habit-based eating.
When Macros Don't Matter Much
If total calories are appropriate and protein is at target, the exact split of remaining calories between carbs and fat matters less than most fitness content suggests. Studies consistently show that isocaloric diets with equal protein produce equivalent body composition changes at the 80/20 level. Beyond protein, the "best" macro split is the one you can actually stick to for 12+ weeks.
The Bottom Line
Set calories first based on TDEE and goal. Set protein second at 0.8–1.2g per lb body weight. Set fat third at 20–30% of calories (never below 0.3g/lb). Carbs fill the remainder. Everything else — keto, paleo, low-carb, IIFYM — is stylistic variation on this same framework. Pick what you'll actually follow for 12 weeks.