Minimum 40 minutes running time — anything shorter falls into short or mid-length categories. Determines festival eligibility and distribution tiers.
The minimum duration of 40 minutes marks the formal transition from short film to full-fledged theatrical release. Below this threshold, festivals and distribution categories operate under different rules — this has less to do with artistic ambition than with economic realities and programming logic. A 38-minute film sits between the stools, no matter how brilliant the execution.
On set and in production, you immediately notice the difference in budgeting and crew structure. Feature films require different insurance, different union contracts (depending on the country), and longer shooting durations on average. The investment in lighting, sound, and production design multiplies from this runtime onwards — a 120-minute film isn't twice as expensive as a 60-minute film, but the production logistics are entirely different. You calculate differently: a set day might still be manageable for a short film, but for feature length, you need at least three to five weeks of shooting time, often significantly more.
In editing decisions, it counts: with feature length, you impose discipline on yourself. You can't drag out a 45-minute story through repetition and lingering shots to achieve runtime. You need genuine narrative complexity — multiple plotlines, character development with room to breathe. This distinguishes a true feature film from a filmed television movie that has merely been stretched to 40+ minutes.
Festivals and distribution are stubborn here: under 40 minutes → short film categories, different competitions, smaller prizes, harder to get into cinemas. Over 40 minutes → you play in the league of full-fledged feature films. This sounds arbitrary, but it has been the international rule for decades — not just in Germany, but at Cannes, Berlin, and Venice as well. Streaming platforms have since softened this boundary, but for classic film festival careers, it remains unbroken.
Practically, this means for your project development: if the story doesn't sustain at least 40 minutes without being artificially stretched, then it's perhaps honestly a short film — and that's not a flaw, just a different genre with its own strengths.