Security cameras are very important for keeping people safe, keeping an eye on things, and giving you peace of mind, whether you own a home or a business. People often ask, "How long do security cameras keep footage?"

There isn't a one-size-fits-all answer. The type of camera, how you store the footage, the recording settings, and the reason for the surveillance all play a role. Let's make it easy to understand with Backstreet surveillance.

Standard Retention Periods for Security Camera Footage

Most security camera systems keep video for between three and ninety days. But that's just a rough range. Here's a more detailed breakdown as per Spencer Morgan Law:

Type of Use	Average Retention Period
Home Security Systems	7 – 30 days
Small Businesses	14 – 90 days
Banks & Large Enterprises	90 days or more
Public/Government Surveillance	30 days to 1 year (depending on regulations)

Types of Security Cameras and Their Storage Capacity

To know how long footage is kept, you need to know what kind of camera and system you are using. Let's take a look at some of the most common types in the United States.

1. Power over Ethernet Security Cameras

PoE security cameras are wired directly to a central NVR system. People like these for their homes and businesses because they have a stable connection and record high-quality footage.

Storage Duration: 15 – 90 days (depending on NVR capacity)
Best For: Larger homes, retail stores, office buildings
Pros: Less interference, consistent power supply, higher video quality

2. Dome Security Cameras

Dome surveillance cameras are compact, ceiling-mounted cameras widely used in indoor environments such as offices, hotels, and lobbies.

Storage Duration: 7 – 30 days
Best For: Indoor monitoring, discreet surveillance
Pros: Vandal-resistant design, wide field of view

3. Pan-Tilt-Zoom Security Cameras

PTZ security cameras allow users to control camera movement remotely. These are typically used for wide-area surveillance, such as parking lots or warehouses.

Storage Duration: 15 – 60 days
Best For: Large outdoor areas, events, or locations needing dynamic viewing
Pros: Covers large areas, zoom capability for detail capture

4. Outdoor Night Vision Cameras

These cameras are specifically designed to capture footage in low-light or no-light conditions. They are equipped with infrared (IR) technology and are used extensively for home exteriors and outdoor business premises.

Storage Duration: 7 – 30 days
Best For: Driveways, backyards, storefront exteriors
Pros: Night vision, weatherproof, reliable for 24/7 surveillance

Where Is Footage Stored? (And Why It Matters)

1. Local Storage: DVR/NVR Systems

Footage is saved to DVR (Digital Video Recorder) or NVR (Network Video Recorder) devices in local systems. These devices usually use hard drives that can hold anywhere from 500GB to several terabytes.

Example: A 2TB NVR system with 6 cameras recording 24/7 in HD could store footage for around 20–25 days before overwriting starts.
Expansion Tip: You can extend storage by upgrading the hard drive or adding external storage.

2. Cloud Storage

Modern systems let you store data in the cloud either on its own or in combination with local storage. Cloud-based systems usually have different retention plans. Some are free for 1 to 3 days, while others cost money and last 30 to 90 days or more.

Pros: Accessible from anywhere, safer from theft or tampering
Cons: Monthly subscription required, dependent on internet speed

Key Factors Affecting Footage Retention

There are a few things that affect how long do security cameras keep footage:

1. Recording Mode

Continuous Recording uses more storage but gives a full-time view of activities.
Motion-Activated Recording only records when movement is detected, saving storage and allowing longer retention times.

2. Video Resolution

Higher resolution = larger file size = faster storage consumption.

Resolution	File Size/hour (per camera)
720p	~300 MB
1080p	~500 MB – 1 GB
4K	~2 – 4 GB

3. Number of Cameras

The more cameras you have in your business security camera systems, the faster the storage will fill up. For instance, a system with four 1080p dome cameras recording all the time will use a lot less power than one with twelve 4K PTZ cameras.

4. Storage Type & Capacity

A 1TB hard drive can store approximately:

2 weeks of footage for 4 cameras (1080p, 24/7 recording)
4 weeks with motion-triggered recording

If you're using an NVR surveillance system, check the specs of your unit; it usually mentions max storage supported (e.g., 4TB, 8TB).

Retention Policies for Businesses in the U.S.

For businesses, it's not just about convenience; it's often about compliance.

The FDIC requires banks to retain ATM footage for at least 90 days.
Hospitals and schools may have different guidelines based on state laws and internal policies.
Retail stores generally retain footage for 30–90 days to review incidents like theft or accidents.

There is no federal mandate in the U.S. regarding how long footage must be stored, but local laws and insurance requirements often influence these durations.

Tips to Maximize Your Footage Storage

If you want to get the most out of your camera system without constantly buying new hard drives or storage plans, consider the following:

Switch to Motion-Based Recording: Reduces file size drastically
Lower the Frame Rate: 15–20 fps is sufficient for most security needs
Schedule Recordings: Record during high-risk times only (e.g., nights, weekends)
Use H.265 Compression: This modern video codec can reduce file sizes by 50% compared to H.264
Invest in High-Capacity NVRs: If you use PoE cameras or dome security cameras, pair them with expandable storage NVRs

What Happens After Footage is Deleted?

When your system's storage is full, it usually starts loop recording, which means it deletes the oldest footage to make room for new data. If you need to keep important recordings (like after an event), make sure to back them up and export them right away.

Conclusion

So, how long do security cameras keep footage? It largely depends on your setup, your recording settings, and what you're using the system for.

Businesses usually opt for 30–90 days.
Homeowners might be fine with 7–30 days.
High-security institutions may keep footage for several months or more.

Choosing the right combination of PoE cameras, NVR systems, or even an outdoor night vision camera ensures you get the ideal balance between performance and storage. If you're setting up a business surveillance system or upgrading your dome cameras at home, knowing your retention needs upfront helps you make better decisions.

Need help choosing the right system? Balance your storage needs with camera type, whether PoE, PTZ, or dome cameras, to get the best protection with the right retention.

FAQs

Can I store security camera footage for longer than 90 days?

Yes, with expanded NVR storage or premium cloud plans, you can store footage for 6 months or even a year.

Do all cameras automatically delete old footage?

Most systems are set to loop recording by default, meaning old footage is deleted to make room for new recordings. You can often change these settings.

Is 24/7 recording better than motion-based recording?

It depends on your needs. Motion-based saves space and is ideal for homes, while 24/7 recording is better for high-risk business areas.

How can I retrieve deleted footage?

Once overwritten, footage is generally unrecoverable unless you've backed it up. Some cloud providers offer recovery within a short window.

Are there any laws in the U.S. that require minimum retention times?

There’s no federal law, but certain industries (like banking and healthcare) have specific regulations based on state laws or insurance policies.

How Long Do Security Cameras Keep Footage?