Every filmmaker has watched someone announce their $200 short, and every filmmaker knows someone who spent $80,000 on twelve minutes. Both are real. Here's what the money actually does at each level, so you can budget the film you're really making instead of the one you wish you were making.
The three tiers
Ultra-low: $500–$2,000. Friends as crew, one or two locations you control, a borrowed or rented camera, daylight doing the lighting work. This is the weekend-with-committed-people budget. It works when the script is small — two characters, one room, one idea.
Modest: $5,000–$15,000. This is where most festival-worthy shorts live. A small paid or stipended crew, permits for real locations, food that keeps people happy, a sound person (worth every penny), and a festival run afterward. The jump from $2,000 to $8,000 buys you reliability — people show up on day three.
Mid: $20,000–$50,000 and up. Multiple locations, a name actor for a day or two, union considerations, post-production done properly — color, sound mix, score. At this level you're buying polish and reach.
Where the money actually goes
Three things eat nearly every short-film budget: locations (rentals and permits — a free location is the single biggest budget saver in existence), food (feed people well or watch your crew evaporate; this is not where you economize), and people (even deferred-pay shoots run better with stipends — gas money is respect).
Cameras are cheap now. Lenses can be rented. What you can't fake is a location you don't control and a crew running on fumes.
The costs nobody budgets
Festival submissions: $30 to $75 each, and a real festival run is 15 to 30 festivals. Budget $500–$1,000 or your finished film sits on a hard drive. Insurance: some locations and permit offices require it — a few hundred dollars. Post sound: audiences forgive a soft image; they never forgive bad audio. If you have to choose between a better camera and a sound person, take the sound person every time.
Write the movie you can afford
Here's the move most first-time directors miss: budget the script before you fall in love with it. Twelve locations, four night exteriors, a crowd scene on page 60 — that's not a $5,000 film, and finding out in pre-production is how movies die.
ScriptForge's production breakdown reads your script and tells you what it will cost to shoot: locations, cast size, extras, night shoots, effects. You see the money on the page while you can still rewrite the crowd scene into two people in a kitchen. Constraints don't kill creativity — they focus it. Some of the best shorts ever made are one location and two actors.