Daily or weekly baseline costs a studio/producer must cover before profit kicks in — rent, overhead, salaries. Producer works against this number, not zero. Critical threshold in financing.
Before the first euro of profit flows into the studio, the machine has to run — and that costs money. The house nut is the daily or weekly minimum expenditure that a production office, a studio, or an independent production company must cover to exist at all. Rent for office and storage space, insurance, salaries of permanent employees, utilities, administration — all of this runs 365 days a year, regardless of whether filming is currently taking place or not. The producer is not working against a break-even point, but against this figure. Anyone who doesn't know their house nut doesn't know how much profit a project actually generates.
In practice, this means: A budget of two million euros for a feature film may ultimately yield less than expected if the monthly house costs amount to 50,000 euros and post-production is delayed by six months. These months cost money, even if no camera is rolling. Therefore, experienced producers factor in house nut gaps — not just shooting days, but also "dead time" between production and delivery. For series, this calculation becomes a decisive factor: an 8-episode series with long breaks between seasons can quickly become unprofitable if the studio does not cover its fixed costs.
The threshold is also psychologically relevant. Financiers and studios think in house nut units — not in individual film budgets. A film that grosses 200,000 euros can be a complete loss-making month for a studio with 400,000 euros in monthly house nut, while the same film is a success for a smaller boutique production company with 20,000 euros in fixed costs. That's why not every project scales for every producer. Anyone who consistently shoots above their house nut requirements is heading for disaster — regardless of the box office success of individual films. Conversely, modest, poorly reviewed projects can be economically sensible if they cover the house nut and keep the team employed. It's about system stability, not individual works of art.
On average, established production houses calculate a break-even point between 120 and 150 percent of their house nut — the margin for personnel redundancy, emergency funds, and profit. Anyone working below that is depleting their assets.