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INT. vs EXT. — Scene Headings Explained (2026 Update)

May 7, 2026 · by David Kaufman · 10 min read

If you've ever opened a screenplay, you've seen them: those mysterious lines at the top of scenes that look like INT. COFFEE SHOP - DAY or EXT. ABANDONED WAREHOUSE - NIGHT. These aren't random formatting flourishes—they're scene headings (also called slug lines), and they're absolutely essential to professional screenwriting. Whether you're writing your first script or your fifteenth, mastering INT. and EXT. designations is fundamental to how readers and producers understand your story's geography and pacing.

In this 2026 update, we'll break down everything you need to know about scene headings, when to use INT. versus EXT., common mistakes writers make, and how proper formatting can actually improve your screenplay's readability and professionalism.

What Are Scene Headings (Slug Lines)?

A scene heading is the line that appears before every scene in your screenplay. It tells the reader three essential pieces of information at a glance:

Location: Where the scene takes place
Interior or Exterior: Whether we're inside or outside
Time of Day: Whether it's day, night, dawn, dusk, etc.

The standard format is:

INT./EXT. LOCATION - TIME OF DAY

Think of scene headings as a visual shorthand. They're not just for the reader's convenience—they help producers estimate budget, assistants organize location scouts, and directors plan their shot lists. A scene heading tells everyone involved in production exactly what they're looking at before they read a single line of dialogue.

INT. — Interior Scenes Explained

INT. stands for "interior," meaning the scene takes place inside a building, vehicle, or other enclosed space.

Common INT. Examples

INT. SARAH'S APARTMENT - MORNING
INT. POLICE STATION - INTERROGATION ROOM - NIGHT
INT. TAXI - CONTINUOUS
INT. HOSPITAL - SURGICAL WING - DAY
INT. RESTAURANT KITCHEN - EVENING

Notice how the location can be as broad as "SARAH'S APARTMENT" or as specific as "POLICE STATION - INTERROGATION ROOM." The specificity should match your script's needs—if multiple scenes happen in the police station, breaking down the interrogation room separately helps readers track location changes. If you only visit the police station once, "INT. POLICE STATION - NIGHT" is sufficient.

When to Use Multiple Location Designations

Sometimes you'll see headings like:

INT. OFFICE BUILDING - ELEVATOR - DAY

This tells readers you're inside the office building, specifically in the elevator. Use this format when:

You're moving between distinct areas of a larger location
Production needs to know the specific room or space for scheduling and budgeting
The distinction affects how the scene plays (an elevator has different blocking than a conference room)

However, avoid over-complicating your headings. "INT. APARTMENT - KITCHEN" is clearer than "INT. SARAH'S APARTMENT BUILDING - UNIT 4B - KITCHEN - PANTRY AREA." Keep it specific enough to be useful, but broad enough to stay readable.

EXT. — Exterior Scenes Explained

EXT. stands for "exterior," meaning the scene takes place outside in the open air. This is anywhere from a city street to a forest, a backyard, a parking lot, or the Grand Canyon.

Common EXT. Examples

EXT. NEW YORK CITY STREET - DAY
EXT. ABANDONED FARMHOUSE - NIGHT
EXT. BEACH - SUNSET
EXT. PARKING LOT - CONTINUOUS
EXT. MOUNTAIN CABIN - PORCH - DAWN

Exterior scenes often have more freedom in their designation because the location itself is typically self-contained. A street is a street; a beach is a beach. However, if you need to distinguish between different areas, you can break it down further:

EXT. SUBURBAN NEIGHBORHOOD - MASON FAMILY HOUSE - FRONT YARD - DAY

This gives production a clear picture: we're in a suburban neighborhood, at a specific house, in the front yard. They'll know to scout a neighborhood, find a house with a particular front yard, and arrange their crew accordingly.

When to Use Multiple Exterior Designations

Use sub-designations for exterior locations when:

You're filming different parts of a larger outdoor space (like a backyard vs. a deck)
The geography matters for understanding character movement or visual storytelling
Production needs distinct location Scout information for different areas

Special Cases: When Geography Gets Complicated

INT./EXT. — Transitional Spaces

Some locations blur the line between inside and outside. A garage, a covered patio, or a subway station might feel like either. In these cases, choose based on what's dominant:

INT. PARKING GARAGE - LEVEL 2 - NIGHT (enclosed, covered structure)
EXT. PATIO - COVERED AREA - EVENING (open-air with a roof overhead)

If you're unsure, ask yourself: if it rains, does the character get wet? If the answer is no, it's likely INT. If yes, it's likely EXT.

Moving Vehicles

Vehicles require special attention. Are we inside the car (INT.) or outside it (EXT.)? The answer depends on the scene:

INT. CAR - MOVING - DAY (we're inside the vehicle during driving)
EXT. HIGHWAY - DAY (we're watching the car from outside)
INT. TAXI - PARKED - NIGHT (we're inside the cab, but it's not moving)

For moving vehicles, adding "- MOVING" clarifies that the vehicle is in transit. For stationary vehicles, you can specify "- PARKED" or simply list it as a location.

Montages and Intercut Scenes

Montages and intercut scenes have their own headings. Rather than "INT./EXT.," you might write:

MONTAGE - RACHEL'S TRAINING REGIMEN
INTERCUT - MARCUS IN JAIL / DETECTIVE IN PRECINCT

These special headings tell readers that multiple locations or moments are being shown simultaneously or in rapid succession. They're a powerful filmmaking tool for conveying the passage of time or showing parallel action.

Time of Day Designations

The third component of your scene heading is the time of day. The most common designations are:

DAY — Daytime, natural light
NIGHT — Nighttime, typically dark
DAWN — Early morning, sunrise
DUSK — Evening, sunset
MORNING — Early daytime (optional, but useful for clarity)
AFTERNOON — Midday to early evening (optional)
EVENING — Twilight or early night (optional)
CONTINUOUS — The scene happens immediately after the previous scene with no time gap
LATER — Time has passed; same location, later in the day
THE NEXT DAY — The scene occurs on a new day

The primary reason for time-of-day designations is practical: they tell production whether they need natural light, artificial light, or studio setup. "INT. BEDROOM - DAWN" signals something very different visually than "INT. BEDROOM - NIGHT."

Use "CONTINUOUS" when a scene picks up immediately where the last one left off. This is common in action sequences or real-time scenes. Use "LATER" or "THE NEXT DAY" when significant time has passed but you want to emphasize it without losing scene continuity.

Common Scene Heading Mistakes (And How to Avoid Them)

After reading thousands of screenplays, we've spotted patterns in formatting errors. Here are the most frequent mistakes writers make with scene headings:

Mistake #1: Inconsistent Location Names

If a scene happens at "INT. COFFEE SHOP - DAY" early in your script, don't later refer to it as "INT. CAFE - DAY" or "INT. DOWNTOWN COFFEE SHOP - DAY." Pick a name and stick with it. Inconsistency confuses readers and can actually complicate production, where location scouts are tracking specific named locations.

Better: Establish your location name in the first scene and use it consistently throughout.

Mistake #2: Over-Complication

Some writers create overly detailed headings:

INT. LUXURY APARTMENT BUILDING - MARCUS'S PENTHOUSE SUITE - MASTER BEDROOM - ENSUITE BATHROOM - DAY

Unless each of those locations gets a separate scene, collapse them. If Marcus moves from his bedroom to his bathroom in one continuous scene, use one heading. If they're separate scenes, give each its own heading.

Mistake #3: Forgetting the Time of Day

Your scene heading should always include a time designation. Without it, readers (and production) can't visualize the scene. Never write just "INT. OFFICE - MICHAEL" or "EXT. STREET." Always include INT./EXT., location, and time.

Mistake #4: Using Non-Standard Time Designations

Stick to industry-standard terms. "INT. APARTMENT - SUPER EARLY MORNING" is vague. Use "DAWN" or "MORNING" instead. "EXT. BEACH - REALLY LATE" should be "EXT. BEACH - LATE NIGHT." Clarity matters.

Mistake #5: Changing INT./EXT. Mid-Scene

Each new scene heading indicates a new scene. If your camera moves from inside a house to the front porch in one continuous moment without a cut, you still need two headings:

INT. HOUSE - LIVING ROOM - DAY
[Action and dialogue inside]
EXT. FRONT PORCH - CONTINUOUS
[Action and dialogue outside]

This is correct formatting. Don't try to combine them or use "/" notation like "INT./EXT." for a single scene unless the scene genuinely takes place across both spaces simultaneously (which is rare).

How Proper Scene Headings Improve Your Screenplay

Correct scene heading formatting isn't just about following rules—it actively improves your screenplay. Here's why:

Readability: Clear scene headings let readers quickly scan your script and understand its structure. A producer can flip through and understand your story's geography at a glance.

Production Planning: Line producers and location scouts use scene headings to estimate budget and logistical needs. Proper formatting gives them the information they need to move forward efficiently.

Pacing: Scene headings break up the visual rhythm of your script. Changing locations and times keeps readers engaged and prevents long stretches of dense text.

Professionalism: If your scene headings are sloppy or inconsistent, it signals to readers that you don't understand screenplay format. Correct formatting shows you're serious about your craft.

When you're ready to finalize your script's formatting, tools like our screenplay formatter can ensure all your scene headings follow industry standard. It's especially helpful if you're writing in a text editor or migrating from another format.

Scene Headings in Different Script Types

While the basic INT./EXT. rule applies across all screenwriting, different script types have nuances worth noting.

Feature Films

Feature scripts use standard scene headings throughout. A typical feature might have 40-60 scenes, so clear location tracking is essential. If you're writing a feature, our free feature film screenplay template includes proper scene heading formatting you can reference.

TV Scripts

TV pilots and episodic television use scene headings identically to features, but TV tends to have more location changes per episode due to shorter run times. Consistency becomes even more important when you're writing 8-10 scenes in 45 minutes.

Short Films

Short films often have fewer locations due to budget and shooting constraints, but scene headings are just as critical. Our short film screenplay template shows how scene headings work in condensed storytelling.

Podcasts and Audio Drama

Interestingly, audio drama and podcast scripts still use scene headings, even though there's no visual component. They help organize the script and guide sound designers on ambient audio and mood.

Pro Tips for Scene Heading Mastery

Create a Location List

Before you start writing, list every location in your script. Assign each one a consistent name and whether it's INT. or EXT. Keep this list handy while writing to ensure you never accidentally rename a location mid-script.

Use Scene Headings to Control Pacing

Frequent location changes (INT., EXT., INT., EXT.) create a sense of momentum and energy. Long stretches in one location can feel static. Use this strategically. Action movies often change locations rapidly; intimate dramas might stay in one place longer.

Make Your Locations Memorable

Instead of generic headings like "INT. OFFICE - DAY," consider specificity that hints at character or theme: "INT. DETECTIVE HARRIS'S CRAMPED OFFICE - NIGHT" or "INT. LUXURY PENTHOUSE - DAY." (The character name or descriptor doesn't go in the heading, but it informs your choice of location name.)

Double-Check Consistency During Rewrites

After your first draft, do a "location pass" where you review every scene heading. Search for each location to ensure it's named identically every time. A simple find-and-replace can save you from embarrassing inconsistencies.

Remember: "Continuous" Is Your Friend

When action flows from one space to another without a time gap, use "CONTINUOUS" in the

scene headings INT EXT slug line formatting