CCTV Guide
Getting CCTV retention right is as important as the cameras themselves — store too little and footage may be gone before an incident is reported; store too much without the right hardware and recordings overwrite prematurely. This guide explains the factors that govern retention, how to calculate storage, and what UAE regulatory obligations you should be aware of.
In short: There is no single retention period for every CCTV system in the UAE: it depends on the premises type, the emirate and the regulator's rules, which ADMCC sets for applicable sites in Abu Dhabi and SIRA for its categories in Dubai. For private homes and small businesses with no specific mandate, 30 days is a widely used practical benchmark.
| Published by | Published by Emirtech Technology, an ADMCC-approved security systems company in Mussafah, Abu Dhabi, in operation since 2018. |
|---|---|
| Where? | Abu Dhabi and Al Ain. Dubai rules are explained for context only: Emirtech holds no SIRA registration. |
| Please note | General information, not legal advice. Requirements change: confirm the current rules for your premises with ADMCC, and with SIRA for Dubai. |
| Last reviewed | 21 October 2026 |
There is no single, universal retention period that applies to every CCTV system in the UAE — the right duration depends on the type of premises, the emirate, and any specific obligations set by the relevant regulatory authority. In Abu Dhabi, CCTV for many commercial and certain residential premises falls under the oversight of ADMCC (Abu Dhabi Monitoring & Control Centre), which sets minimum retention requirements for applicable sites; operators should confirm the current requirement for their specific premises category directly with ADMCC, as requirements are periodically reviewed. In Dubai, SIRA (Security Industry Regulatory Agency) sets requirements for categories of premises within its jurisdiction. For private residential properties and small businesses not subject to a specific mandate, a retention period of 30 days is a widely used practical benchmark that balances storage cost against the likelihood that a theft, damage claim, or dispute is reported within a reasonable window. The actual storage space required depends on four factors working together: the number of cameras, the recording resolution, the frame rate, and the number of days of retention needed — and sizing the NVR hard drive correctly from the outset is the only way to ensure the system genuinely records for as long as it is supposed to.
Sizing storage for a CCTV system in Abu Dhabi or Al Ain? Emirtech offers a free site survey and an itemised written quotation, and we reply the same working day. See CCTV installation in Abu Dhabi or request a quotation.
A CCTV system that overwrites its recordings after just a few days may technically be recording continuously, yet be useless for the majority of incidents that prompt a review. Property damage is often not noticed immediately; employee disputes may come to light days or weeks after the event; insurance claims and police reports frequently involve a time lag between an incident and the formal request for footage. If recordings have already been overwritten, there is nothing to retrieve.
Equally, setting an ambitious retention target — say 90 days — without correctly sizing the storage to support it simply means the NVR will reach full capacity sooner and begin overwriting earlier than the owner expects. The stated retention setting in the recorder's software is only meaningful if the installed hard-drive capacity is large enough to hold that volume of footage at the configured resolution and frame rate.
Understanding these variables allows a system to be specified and configured so that the actual retention matches the target retention — consistently, from day one.
Storage sizing is a straightforward calculation once you know the four input variables. The formula below gives a working framework; actual figures will vary slightly between camera models, codecs (H.264 vs H.265), and scene complexity (a busy car park compresses less efficiently than a quiet corridor).
The approximate storage required in Gigabytes can be estimated with this formula:
| Step | Formula / Example |
|---|---|
| Bitrate per camera (Mbps) × number of cameras | e.g. 3 Mbps × 8 cameras = 24 Mbps total |
| Convert to Megabytes per second | 24 Mbps ÷ 8 = 3 MB/s |
| Multiply by recording hours per day × 3,600 seconds | 3 MB/s × 24 h × 3,600 = 259,200 MB per day |
| Convert to GB per day | 259,200 ÷ 1,024 ≈ 253 GB per day |
| Multiply by retention days | 253 GB × 30 days = 7,590 GB (≈ 7.6 TB) |
| Add headroom (approximately 10–15%) | 7,590 GB × 1.12 ≈ 8.5 TB minimum HDD capacity |
H.265 (also known as HEVC) compresses video significantly more efficiently than H.264, producing roughly the same visual quality at a lower bitrate. For a system where all cameras and the NVR support H.265, you can either reduce storage requirements for the same retention period or extend the retention period with the same hard-drive capacity — a meaningful advantage for larger systems where drive costs are significant. Most NVR platforms sold in the UAE market today support H.265; confirm compatibility between cameras and recorder before specifying.
Recording continuously at full resolution is the simplest configuration but rarely the most efficient. Splitting cameras into recording schedules — full-resolution continuous recording for high-activity zones such as entrances, tills, and car-park exits; and motion-triggered recording for lower-activity areas such as storerooms or overnight corridors — can extend effective retention considerably for a given hard-drive capacity. The trade-off is that motion-trigger sensitivity must be calibrated carefully: too sensitive and the storage savings diminish; too coarse and brief incidents may not trigger a recording.
For a precise storage calculation tailored to your camera count, resolution, and retention requirements, Emirtech provides this as part of a free site survey and system design. Our ADMCC-approved CCTV installation service includes full storage sizing as standard.
Storage Variables
A 4 MP camera operating at its typical bitrate generates roughly twice the data per hour of a 2 MP camera at the same frame rate. Moving to 8 MP (4K) increases data volume further still. Selecting the minimum resolution that satisfies your identification requirements — rather than always specifying the highest available — is the single most effective way to reduce storage consumption without compromising usability.
Recording at 25 frames per second (the broadcast standard) produces smooth footage but generates substantially more data than recording at 10 or 15 fps — which is often adequate for most security purposes. High frame rates add real value where fast-moving subjects must be identified clearly, such as at a vehicle entrance. For static zones like storerooms, a lower frame rate produces perfectly adequate footage at a fraction of the storage cost.
Each additional camera multiplies the total daily data volume. A site that doubles its camera count without adding hard-drive capacity will halve its effective retention period. Scheduling cameras to record continuously during operational hours and switching to motion-triggered recording overnight — rather than running all cameras at full settings around the clock — can extend retention significantly for a fixed storage budget.
For commercial CCTV systems in the UAE, retention is not solely an operational decision — it may also be a regulatory requirement, and the applicable rules vary by emirate and premises type.
In Abu Dhabi, the Abu Dhabi Monitoring & Control Centre (ADMCC) regulates CCTV for a range of commercial, hospitality, retail, and residential-compound premises. ADMCC sets minimum standards covering camera placement, resolution, and recording retention duration for applicable premises categories. Emirtech is an ADMCC-approved CCTV contractor; we design and install commercial Abu Dhabi systems to meet these standards. However, because requirements are subject to revision, operators should confirm the current retention obligation for their specific premises category directly with ADMCC rather than relying on any fixed figure quoted in a third-party guide.
In Dubai, the Security Industry Regulatory Agency (SIRA) sets CCTV requirements — including minimum retention periods — for certain categories of commercial premises. SIRA requirements apply to SIRA-licensed establishments; operators in Dubai should verify their obligations directly with SIRA. Emirtech does not hold SIRA approval and refers SIRA-regulated work in Dubai to a SIRA-licensed contractor; for SIRA-regulated premises in Dubai, operators should confirm contractor approval status with SIRA.
For a full ADMCC-compliant design for an Abu Dhabi site, see our CCTV installation services in Abu Dhabi page, or request a free survey below.
While minimum retention is set by the relevant authority for regulated premises, many operators ask what a sensible baseline looks like in practice. The following represents common industry guidance; it does not substitute for confirming your specific regulatory obligation.
Private residential villas and apartments: A retention period in the range of 14 to 30 days is broadly adequate for most household incidents — a theft, a dispute with a contractor, or a damage claim will generally come to light within this window. If a property is left unoccupied for extended periods, sizing storage to cover the full absence is prudent. Motion-triggered recording on interior cameras is common and reduces storage consumption significantly.
Small retail shops and offices: 30 days is a widely used baseline. Incidents such as shoplifting, customer slips, or staff disputes may not come to formal attention immediately; a month of retained footage covers most realistic scenarios. If your insurer or lease agreement specifies a minimum, that takes precedence.
Hotels, residential compounds, and hospitality premises (Abu Dhabi): ADMCC sets retention requirements for applicable premises in Abu Dhabi; the specific figure must be confirmed with ADMCC. Systems should be designed to meet this requirement, not merely approximate it — an NVR that overwrites after fewer days than required because the hard drive was under-specified does not satisfy the obligation.
Warehouses, logistics facilities, and industrial sites: Longer retention is often justified by the higher value of goods and vehicles on site and the complexity of incidents that may require extended investigation. Operators in this segment may opt for 60 to 90 days where storage cost allows, combined with motion-triggered recording in lower-activity zones to manage hard-drive capacity.
For a storage calculation and NVR specification matched to your site, request a free site survey from Emirtech. Our engineers size hard drives to deliver the retention duration you need, based on your actual camera count, resolution, and recording schedule — not on generic estimates.
Answers
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Related guide: CCTV Retention Periods: ADMCC & UAE Requirements — Guide
Related guide: How Long Is CCTV Footage Stored? Retention Guide
Related guide: H.264 vs H.265 vs H.266: CCTV Compression Explained
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