Walk into any safe retailer and you'll see terms like "RSC rated," "UL TL-15," or "TL-30x6" plastered on product labels. Most buyers gloss over these numbers — and that's a mistake. Safe security ratings are the single most important specification you can understand before purchasing a safe. They tell you exactly how long your safe can resist a determined attack.
As safe service professionals who work on every type of safe imaginable, we've seen firsthand what happens when someone buys the wrong level of protection for their needs. Here's what those ratings actually mean.
Who Sets Safe Security Ratings?
The gold standard for safe ratings in the United States comes from Underwriters Laboratories (UL), an independent testing organization founded in 1894. UL engineers physically attack safes using a defined set of tools and measure how long the safe holds up. This is not a paper certification — it's a real-world destruction test.
There is also an insurance industry rating system (B-Rate, C-Rate, E-Rate) based on construction specifications rather than live testing. These matter for insurance coverage limits but are less meaningful than UL's performance ratings.
Safe security ratings from basic residential to high-security commercial grade
The Rating Levels Explained
B-Rate and C-Rate — Insurance Industry Ratings
These ratings come from the insurance industry and are based on steel thickness rather than live testing. A B-Rate safe has a door less than 1 inch thick and a body less than half an inch thick. A C-Rate safe has a body at least half an inch thick and a door at least 1 inch thick. Neither rating has been independently tested by a third party. If you're storing anything of real value, these are a starting point at best.
RSC — Residential Security Container
The RSC rating is UL's entry-level tested certification. To earn it, a safe must withstand a five-minute attack by a single person using common tools — screwdrivers, pry bars, hammers up to 10 lbs, and similar hand tools. An RSC rating is a minimum bar, not a high one. A determined, experienced burglar with the right tools can defeat an RSC safe. That said, RSC safes deter most opportunistic theft and are appropriate for storing items valued under $25,000.
TL-15 — Entry Level High Security
This is where true commercial-grade security begins. A UL TL-15 rated safe must withstand 15 minutes of net working time from trained engineers using mechanical and electronic tools including high-speed drills with carbide bits. The safe must weigh at least 750 lbs or be designed for anchoring. The walls must be at least 1 inch of solid steel. Insurance companies typically cover up to $100,000–$150,000 in valuables in a TL-15 safe.
TL-30 — The Commercial Standard
TL-30 doubles the attack time to 30 minutes and adds more aggressive tools including abrasive cutting wheels and power saws. Construction requirements are similar to TL-15 but the safe must be able to withstand a more sophisticated attack. Jewelry stores are frequently required by their insurers to use TL-30 rated safes. Coverage limits typically extend to $200,000.
TL-30x6 — Six-Sided Protection
The "x6" means the 30-minute attack test is conducted on all six sides of the safe — not just the door. This is the highest commonly available commercial rating and is appropriate for businesses with extremely high-value inventory or cash on hand.
TRTL-30x6 and TXTL-60x6 — Torch and Explosive Resistant
The "TR" prefix indicates torch resistance — the safe can also withstand cutting torches and thermal attacks in addition to tool attacks. "TX" adds explosive resistance. These ultra-high-security ratings are typically found in bank vaults and high-security government facilities.
| Rating | Attack Time | Tested By | Coverage (Typical) | Best For |
|---|---|---|---|---|
| B-Rate | Not tested | Industry standard | Up to $5,000 | |
| RSC | 5 minutes | UL | Up to $25,000 | |
| TL-15 | 15 minutes | UL | Up to $150,000 | |
| TL-30 | 30 minutes | UL | Up to $200,000 | |
| TL-30x6 | 30 min all sides | UL | Up to $375,000+ |
Important note: The attack times in UL ratings are "net working time" — meaning the clock only runs when a tool is actively in contact with the safe. A real-world burglary attempt against a TL-30 safe would take far longer than 30 minutes. Skilled safe technicians report that even with full knowledge of a safe's construction and the right tools, opening a TL-30 can take 1–8 hours.
Fire Ratings Are Separate
It's important to understand that burglary ratings and fire ratings are entirely separate certifications. A safe can have an excellent burglary rating with no fire protection, or vice versa. Fire ratings measure how long the interior of a safe stays below a temperature that would damage paper (350°F) during a standardized fire test. Common fire ratings are 30 minutes, 1 hour, and 2 hours at specified external temperatures.
For most homeowners and businesses, a combination of a reasonable burglary rating and a 1-hour fire rating provides solid all-around protection. Ask your safe technician about safes that are certified for both.
What Rating Do You Actually Need?
The honest answer depends on three things: what you're storing, how much it's worth, and what your insurance requires.
- Everyday documents and small cash amounts — RSC or B/C Rate is fine
- Firearms collection, jewelry under $50,000 — RSC or TL-15
- Business cash, pharmacy inventory, jewelry over $50,000 — TL-15 minimum, TL-30 recommended
- High-value retail, financial institutions — TL-30 or TL-30x6 required by most insurers
Always check with your insurance provider before purchasing a commercial safe — many policies have specific rating requirements that, if not met, can void coverage on a claim.
Pro-TechSafe tip: Not sure what rating your existing safe is? Call us. We can identify any safe's rating, condition, and whether it meets your current insurance requirements — often over the phone.