How long should a cut last?

Most people think of a cut as something you do until you are happy, however long that takes. That is how cuts go wrong. A deficit is a stressor, and like any stressor it works for a while and then starts taking more than it gives. The useful question is not how lean do I want to be, it is how long can a single deficit run before it costs more muscle and sanity than the fat is worth.

The honest rate, and what it implies

Fat loss has a sensible ceiling of roughly half a kilo to one percent of bodyweight per week. Push faster and a growing share of the loss is muscle, not fat. That rate sets your timeline. If you have ten kilos of fat to lose at half a kilo a week, that is twenty weeks of actual deficit, which is already too long to run unbroken, which is the whole point of this article.

You can estimate your own timeline from your current and goal weight here: askcoach.au/tools/macro-calculator gives you the target, and the rate above tells you the weeks.

Why sixteen weeks is a sane ceiling

A single continuous cut should not run much past about sixteen weeks of real deficit. Beyond that, three things stack up: your maintenance drifts down so the same deficit shrinks, the hormonal cost of a long deficit blunts fat loss and recovery, and adherence quietly erodes as diet fatigue sets in. The cut stops being efficient well before you notice, and the back half delivers a fraction of the fat loss of the front half for far more strain.

This is why AskCoach enforces a sixteen-week ceiling on a cut by default and forces a transition when you hit it. It is not an arbitrary limit. It is the point where continuing usually costs you more than pausing would.

If you need to lose more than one cut can deliver

Plenty of people have more to lose than sixteen weeks at a safe rate can remove. The answer is not a longer cut, it is more than one, with real maintenance time between them. Run your cut, then hold at maintenance for around four weeks before starting the next. The maintenance block is not lost time. It lets your maintenance calories recover, gives your training and mood a chance to rebound, and means the next cut starts from a stronger position instead of a depleted one.

Inside a cut, you also want shorter planned breaks roughly every six weeks, about five days at maintenance, to keep the deficit working. This planner maps your whole cut, every break, the end date, and the maintenance block, from one start date: askcoach.au/tools/diet-break-planner.

How to know you have reached the end

Set the end before you start. Decide the length from your goal and the honest rate, mark the date, and treat it as real. When you reach it, you stop and hold at maintenance whether or not you hit the exact number, because pushing a cut past its sane length to chase the last kilo is how people lose muscle and end up rebounding. The lean look that lasts comes from finishing a cut on schedule and protecting it, not from grinding a deficit into the ground.

Knowing when to stop is one of the hardest parts to self-coach, because the willpower that got you lean is the same willpower that wants to keep going past the point of return. A plan that holds the line on phase length for you, and tells you plainly when the cut is done, is doing one of the most valuable jobs a coach does.