Should I bulk or cut?
It’s the single most-asked question in lifting communities. The answer mostly depends on one number: your body fat.
Short answer
Cut if you’re above about 15–20% body fat (men) or 25–30% (women). Lean bulk if you’re lean: about 12% or less for men, 20% or less for women. In between, beginners can recomp (lose fat and gain muscle at maintenance) and experienced lifters can choose based on whether they want abs now or size first. Use the bulk or cut calculator for a verdict with rates.
The rules of thumb
| Body fat (men) | Body fat (women) | Usual call | Why |
|---|---|---|---|
| 20%+ | 30%+ | Cut | Leaner first makes the next bulk mostly muscle and improves health markers. |
| 15–20% | 25–30% | Cut, or recomp if new | A short cut makes progress visible; beginners can build muscle at maintenance. |
| 12–15% | 20–25% | Either | Cut a little for abs, or bulk slowly for size. |
| Under 12% | Under 20% | Lean bulk | You have room to add muscle with little visible fat. |
These are coaching conventions, not physiology laws, and they’re fuzzy: body fat estimates are often off by several points. Use them to choose a direction, then let your measurements decide when to switch.
How fast to go
- Cut: about 0.5–1% of bodyweight a week. Faster risks muscle; slower is fine if it keeps you consistent.
- Lean bulk: about 1–1.5% of bodyweight a month for beginners, 0.5–1% for intermediates and 0.25–0.5% for advanced lifters.
- Recomp: maintenance calories, progressive training, protein around 1.6–2.2 g per kg of bodyweight. The scale barely moves; your waist and photos do.
If you’re “skinny fat”
Low muscle with a soft middle is the classic case where neither a hard bulk nor a hard cut feels right. Recomp: lift seriously, eat at maintenance with high protein, and judge it by your waist going down while your arms and shoulders hold or grow. Read skinny fat: what to do.
When to switch
Stop a cut when you reach your target, when strength drops for several weeks, or after 12–16 weeks for a break at maintenance. Stop a bulk at about 15% (men) or 25% (women), or when your waist has grown more than your arms. Matched photos every two to four weeks make these calls obvious; mirror checks don’t.
See also: What body fat to bulk, cut or recomp at · Body fat for abs
FAQ
Frequently asked questions
Should I bulk or cut at 18% body fat?
Most men at 18% are better off cutting to 12–15% first. Beginners can recomp at maintenance.
Should I bulk or cut at 25% body fat as a woman?
Either works. Recomp or a short cut if you want more definition; a slow lean bulk if you want more muscle.
What if I don’t know my body fat?
Estimate it with a tape measure using the US Navy method, or compare yourself with the body fat chart.
Is a dirty bulk ever a good idea?
Rarely. A large surplus adds mostly fat, which you then have to cut. A slow surplus gets nearly the same muscle with much less fat.
Sources
- Helms ER, Aragon AA, Fitschen PJ (2014). Evidence-based recommendations for natural bodybuilding contest preparation. J Int Soc Sports Nutr 11:20.
- Morton RW et al. (2018). A systematic review, meta-analysis and meta-regression of protein supplementation on muscle mass. Br J Sports Med 52:376–384.
- ProgressLens, What lifters ask about body fat (2026).