Common Screenwriting Mistakes Every Beginner Makes (And How to Fix Them)

I've read enough scripts and written enough bad pages myself to know that the same mistakes show up over and over again. Not because writers aren't talented. Because nobody told them.

That's what this post is for.

If you're working on your first script or your fifth, here are the most common mistakes that get beginners flagged and how to clean them up before anyone else sees your work.

You're Writing Characters, Not People

The single biggest mistake beginners make isn't a formatting issue, it's conceptual. They build a movie around a concept and forget the character.

We don't want a movie about a heist. We want a movie about the guy who has one last shot at a normal life and decides to take the wrong shortcut to get there. Concept is the container. Character is the story.

Start with who your protagonist is at their core: what they want, what they're afraid of, what they're lying to themselves about. Do all that before you write a single scene heading.

Your Scene Headings Are Wrong

This one's pure formatting and it's an easy fix. A scene heading looks like this:

INT. BRADY'S APARTMENT - NIGHT

That's it. Location, interior or exterior, time of day. What it's not:

INT. THE SMALL BEDROOM DOWN THE HALL FROM THE KITCHEN ON THE SECOND FLOOR - JUST BEFORE DUSK

Keep them clean. If a location has multiple areas that matter, break them into separate scenes.

Your Action Lines Are Doing Too Much

Two traps here and beginners fall into both.

Too little: you write two lines for the Battle of Waterloo happening outside a tent. The reader has no idea what they're watching.

Too much: you spend a paragraph describing a character chewing on a pencil. Nobody cares.

Action lines should give the director a picture, not a blueprint. Write what the camera sees. Cut everything else.

You're Writing Unfilmable Things

This is one of the most common notes script readers give. If it can't be seen on screen, it doesn't belong in the action line.

"She turns the corner, wondering where her life went wrong." — Unfilmable. We can't see a thought.

"She turns the corner. Stops. Something in her face shifts." — Now we're in the right medium.

Film is visual. If the information matters, find a way to show it.

Your Dialogue Is On the Nose

Characters in real life almost never say exactly what they mean. Neither should yours.

On the nose dialogue sounds like this: "I'm angry at you because you missed my graduation and it made me feel like I don't matter to you."

Real people and good characters talk around things. They deflect, joke, attack the wrong target, go quiet. The tension lives in what's not being said. That's where the scene actually happens.

If your characters are plainly stating their feelings, back up and find what they'd actually say instead. Subtext is key.

You're Using Too Many Parentheticals

Parentheticals (those little notes under a character's name before dialogue) exist for one reason: when the meaning of a line would be completely misread without a direction.

They're not for telling actors how to perform every line. They're not for sneaking action into dialogue. They're for rare, specific moments when the written words alone won't carry the intent.

If you're using them every few lines, strip them out. Trust your dialogue to do the work. ###Your Characters Have Confusing Names Sam, Sarah, Shari, and Shannon should not all be in the same script. Neither should any two names that start with the same letter if you can help it.

Script readers are moving fast. They're not as invested in your characters as you are. If names look similar on the page, readers will mix them up and a confused reader is a reader who's already checking out.

Pick names that are distinct in shape, length, and first letter. It's a small thing that makes a big difference in the reading experience.

You're Entering Scenes Too Early

Most scenes don't need a hello. They don't need characters walking in, sitting down, and exchanging pleasantries before the real exchange starts.

Enter every scene as late as possible. Start in the middle of the tension. Exit before it's fully resolved, so something pushes the reader into the next scene. In, conflict, out. That's the rhythm.

You're Telling Instead of Showing

The oldest rule in writing and still the most broken. Film is a visual medium. If something important happens, find a way to put it on screen, don't have a character narrate it after the fact.

If your character just witnessed something life-changing, show the moment. Don't show them later telling someone about it. The power of cinema is that we're there in real time.

One Last Thing

All of these mistakes are fixable. The writers who improve the quickest are the ones who learn to read their own work like a reader, not like the person who wrote it.

That's what Scene Zero's built-in Screenwriting Bible is designed to help with. Select any script element in the editor and it explains what it is, how it works, and what industry readers expect to see. It's not a crutch, it's context. The kind I wish I'd had when I was making all of these mistakes myself.

Happy writing.

— Brady