Do Carabiners Expire? Carabiner Retirement Checker
Check when to retire your climbing carabiner based on age, usage frequency, and condition. Retirement check from carabiner age, usage and condition. The age ceiling is our own conservative choice: Petzl and Black Diamond place no age limit on metal.
Quick Answer
Do carabiners expire? Not the way textiles do. This checker applies 10 years from date of manufacture as a conservative ceiling, but that is our figure, not the industry's: Petzl and Black Diamond both publish that age alone does not retire metal hardware. Retire sooner if they show signs of wear, damage, or have been involved in a significant fall. An unused carabiner stored properly can last the full 10 years. A heavily used carabiner may need replacement after 3 to 5 years. The checker below evaluates your carabiner's age, usage frequency, and condition to give a specific retirement recommendation.
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For reference only. The age thresholds here are our own conservative choice, not a published standard. Metal components can fail without visible warning after shock loading. When in doubt, retire it.
On a carabiner it is usually stamped on the spine. If you cannot find it, use the year you bought it, but read the result as a floor: the carabiner left the factory some time before it reached you, so it is probably older than the answer below.
Retirement age used by this checker
Usage
Max age
Never used
10 years
Rarely
10 years
Monthly
7 years
Weekly
5 years
Daily
2 years
Standards this page refers to: UIAA 121, Connectors, and EN 12275, Mountaineering equipment. Connectors. Both test the product; neither sets a retirement age.
Carabiner lifespan depends on how often you climb. Heavy users wear out gear in 1 to 3 years; light users can get the full 10 years.
Usage Level
Typical Lifespan
Retire When
Unused (stored properly)
Up to 10 years
10 years from manufacture date
Light use (10 to 20 days/year)
5 to 10 years
Signs of wear or 10 years
Regular use (50 to 100 days/year)
3 to 5 years
Gate stiffness, wear marks, or 5 years
Heavy use (150+ days/year, gym)
1 to 3 years
Gate play, rough action, or 3 years
Any major fall or impact
Retire immediately
After ANY fall factor >1 on the carabiner
Where these numbers come from
Every age on this page is ours, the ten year ceiling included, and that makes this table different from the textile ones on this site. Petzl states that the lifetime of metal products is not limited, and Black Diamond says age alone does not retire metal hardware, so there is no manufacturer ceiling to inherit and no standard to borrow: EN 12275 and UIAA 121 are product test standards that say nothing about age. Rather than leave the question blank we set a conservative ladder, but it rests on nothing outside this site. What actually retires a carabiner is inspection, wear, deformation and events, so read the result as a prompt to look the carabiner over, not as a deadline somebody else has certified.
Carabiner Inspection Checklist
Run through this checklist before every climbing session. If any check fails, retire the carabiner.
Check
Retire If
Gate action
Stiff, sticky, doesn't snap shut cleanly
Gate play
Lateral movement when closed
Nose/hook
Worn groove where rope runs, visible notch
Spine
Deep scratches, gouges, or cracks
Keylock/snag
Catches on bolts or slings when clipping
Gate spring
Weak, gate doesn't close fully under gravity
Major fall
Involved in fall factor >1, even if looks OK
Age
10+ years from manufacture date (stamped on spine)
When in doubt, retire. A carabiner costs €10 to 15, your life is worth more. Never rely on visual inspection alone after a significant fall.
Do Carabiners Expire?
Carabiners do not expire the way textiles do, and this is where a lot of published advice gets it wrong. Petzl states in its lifetime FAQ that metal products have no age limit of their own, and Black Diamond says the same in its instructions: the ten year ceiling applies to plastic and textile items, while age alone does not retire metal hardware. What retires a carabiner is inspection, wear, deformation and events, not the calendar. The 10 year figure this checker applies is our own conservative ceiling, not a manufacturer recommendation, and we would rather be explicit about the difference than repeat the industry shorthand that puts ten years on everything. This is because aluminium alloys can develop micro-fatigue over time, UV exposure degrades anodisation, and gate springs lose tension. In practice, most active climbers retire carabiners after 3 to 7 years due to wear. The date of manufacture is usually stamped on the spine of the carabiner. Also check your climbing rope retirement, ropes have shorter lifespans than carabiners.
Signs Your Carabiner Needs Replacing
Replace your carabiner immediately if: the gate doesn't snap shut cleanly under its own spring (hold it open, let go, it should close with a crisp click), there's visible wear groove where the rope contacts the nose or basket, the gate has lateral play (wiggle side to side when closed), there are deep scratches or gouges in the spine, the keylock mechanism catches or doesn't seat properly, or the carabiner was loaded in a fall factor >1 scenario. Don't forget your harness retirement, harnesses typically last 3 to 7 years. Understanding fall factor helps assess whether a fall warrants gear retirement.
Damaged Carabiner: Retire, Do Not Repair
A damaged carabiner is retired, never repaired. There is no home fix, no workshop fix and no service that returns a load bearing aluminium connector to a known strength, because nothing you do to it can be verified afterwards. Filing a burr, straightening a gate, replacing a spring or re-anodising a scratched body all leave you holding a piece of metal whose rating nobody can state. Retire it, mark it so it cannot go back on a rack by mistake, and replace it.
This is why the calculator has no repair verdict. There is one maintenance exception and it is worth knowing: Black Diamond's retirement checklist says a stiff gate should be cleaned and lubricated first, and only retired if that does not restore a crisp action. Cleaning is maintenance. Filing is not. What each manufacturer publishes is summarised in the section below, in our own words, and the instruction that came in the box with your model is the one that governs.
Cracked carabiner
Any crack retires it immediately, at any size, anywhere on the body, nose or gate. Aluminium does not crack gradually in a way you can monitor: a visible crack means the piece has already failed locally. Do not load it again, not even to test it.
Corrosion and salt
White powdery patches on aluminium, or rust on steel, mean the surface is being eaten and the strength beneath is unknown. Light discolouration on a well rinsed carabiner is not the same as pitting you can catch with a fingernail. Pitting retires it. Sea cliff and via ferrata gear ages fastest here, and rinsing in fresh water after every salty day is the only thing that slows it.
Dropped carabiner
This is the hardest call on the page, because a drop onto rock can leave a flaw with nothing visible on the surface, and no inspection you can do rules that out. Many climbers retire any carabiner dropped more than a few metres onto hard ground. That is the conservative position and the one we would take: a replacement costs almost nothing next to being wrong.
Gate play and a gate that will not snap shut
Hold the gate open and let go. It should close under its own spring with a crisp click, every time, and seat fully so the nose engages. A gate that closes slowly, sticks, needs a nudge, or wobbles sideways when closed has lost the thing that makes a carabiner a closed system. Grit earns one rinse and dry; if the behaviour returns, retire it.
Where a standard or a manufacturer does not define a threshold, the judgement is yours, and the rule for load bearing gear is that doubt settles it: if you are unsure, retire it. The carabiner standards referenced across this site are EN 12275 and UIAA 121.
Two of them publish carabiner guidance climbers search for by name, and neither says what the industry shorthand claims. Here is each, summarised in our own words with the source linked. Nothing below quotes their instructions, and the instruction that came in the box with your model is the one that governs.
Black Diamond
Black Diamond publishes a six point retirement checklist for carabiners, and it is about condition rather than age. It covers gate function, wear to the surfaces the rope and slings run over, deformation of the body, nose or rivets, deep pitting, and chemical attack or corrosion beyond normal surface oxidation. The point it makes that surprises people most is about the gate: a carabiner held open is far weaker than the same carabiner closed, roughly one third of its closed strength, which is why a gate that does not snap shut is a retirement issue rather than an annoyance.
It also draws the line we repeat in the section above. A stiff or sticky gate gets cleaned and lubricated first: that is maintenance. If cleaning and lubrication do not restore a crisp action, the carabiner is retired. See the Black Diamond retirement checklist for the full list.
Petzl
Petzl does not put an age limit on metal at all. The Petzl lifetime FAQ sets a maximum lifetime of ten years from manufacture for plastic and textile products and states that the lifetime of metal products is not limited. What retires a carabiner instead is a list of conditions: a serious fall or load, failing an inspection, any doubt about its condition, an item whose full history you do not know, and equipment made obsolete by changes in standards or technique. Petzl recommends a detailed inspection at least every twelve months on top of the check before each use.
UIAA and EN 12275
UIAA Standard 121 and EN 12275 are product standards: they define what a carabiner has to do when it is new and tested in a laboratory. Neither tells you anything about the carabiner in your hand after six seasons, and neither publishes a retirement age. That gap is what inspection is for, and it is why the checker on this page leans on condition and events first, with age as a conservative backstop rather than the main test.
Where a standard or a manufacturer does not define a threshold, the judgement is yours, and the rule for load bearing gear is that doubt settles it: if you are unsure, retire it.
Carabiner safety explained
UIAA Standard 121: Connectors
UIAA Standard 121 (and EN 12275) defines the minimum strength, gate locking, and marking requirements for climbing carabiners and connectors. Every carabiner sold for climbing bears CE marking and must pass independent laboratory testing.
Key strength ratings
Major axis (gate closed): minimum 20 kN for standard carabiners
Major axis (gate open): minimum 7 kN (the weakest position)
Minor axis: minimum 7 kN (cross-loaded)
Where these numbers come from: the figures above are transcribed from the text of EN 12275 and UIAA 121, which is a paid document we do not link. We have not been able to verify them against the standard itself, so a reader who needs them exactly has to obtain the document. They describe what a NEW product must survive in a laboratory and carry no promise about a used one.
Gate types
Screw gate (manual lock): must be manually locked; can be used unlocked accidentally
Auto-lock (twist, push-twist, ball lock): spring-loaded to self-close and lock
Keylock nose: smooth nose that does not snag on bolts or webbing
A carabiner is only as strong as its weakest state: gate open, minor axis, or cross-loaded. Always ensure the gate is closed and locked before loading.
Shock loads and carabiners
A carabiner rated at 20 kN can handle a static load of 20 kN without failure. But a dynamic shock load (the force generated in a real fall) can briefly exceed the carabiner's rated strength at the point of load application, even if the belay system arrests the fall safely.
Shock loads occur when a rope transitions from slack to taut instantaneously. The peak force can be 3 to 4× the static weight of the load. In a factor-2 fall scenario (above the anchor), these forces approach or exceed the carabiner's design limits.
When to retire after a shock load
Fall factor above 1: retire immediately, even without visible damage
Loaded by a dropped object: a heavy object dropped from height can shock-load a carabiner to failure
Any fall onto a fixed anchor: inspect carefully; consider retirement
Aluminium alloys used in carabiners can develop micro-cracks under shock loading that are invisible to inspection but significantly reduce future load capacity. When in doubt, retire it.
How to inspect a carabiner
Carabiners are metal but still require regular inspection. Rope and webbing wear, chemical exposure, and mechanical shock all degrade aluminium alloy carabiners over time.
Gate function
Open and close the gate firmly. It must snap shut immediately and fully. Test the locking mechanism: screw gates must tighten completely; auto-locks must engage positively. Any hesitation or failure to close means immediate retirement.
Rope wear grooves
Run your finger along the inside of the spine (the rope contact area). Any groove deeper than approximately 1mm requires retirement. Deep grooves can cut through a rope sheath under load and significantly weaken the spine.
Corrosion and surface damage
Surface oxidation (white powder) on aluminium is superficial and can be wiped clean. Deep pitting, cracks, or sharp edges are cause for retirement. Check the gate hinge and the keylock nose area carefully.
Deformation
A carabiner that looks bent, oval out of shape, or has a gate that no longer aligns correctly must be retired. Even minor visible deformation indicates the metal has been loaded beyond its elastic limit.
Clean carabiners with fresh water and mild soap. Rinse salt and grit thoroughly; both accelerate wear on the gate mechanism and body. Dry completely before storage.
Where these retirement ages come from
Here is the honest position, and it differs from what most pages say. Petzl states that the lifetime of metal products is not limited, and Black Diamond says age alone does not retire metal hardware. The ages below are therefore our own conservative choice, not a manufacturer limit and not a standard, and what actually retires a carabiner is inspection, deformation, wear and events. Unlike textile gear, aluminium carabiners do not degrade through UV exposure. Wear comes from mechanical cycling (gate operations and rope/webbing abrasion) and corrosion.
Usage
Max lifespan
Daily
2 years
Weekly
5 years
Monthly
7 years
Rarely
10 years
Never used
10 years
Retire immediately after any severe shock load, gate malfunction, visible groove wear, or corrosion. When in doubt, retire it.
Frequently asked questions
How long do climbing carabiners last?
With regular use (50 to 100 days/year), climbing carabiners typically last 3 to 5 years. With light use, up to 10 years. The absolute maximum is 10 years from manufacture date regardless of use. Heavy gym use (daily clipping) can wear out a carabiner in 1 to 2 years.
Can I still use a carabiner after a big fall?
If the carabiner was directly loaded during a fall factor >1 (e.g., as part of the anchor or top piece), retire it. Aluminium carabiners can develop internal micro-cracks from high-force loading that aren’t visible externally. For low fall-factor falls on well-placed protection, inspect carefully but the carabiner is likely fine.
Where is the manufacture date on a carabiner?
Most manufacturers stamp the date on the carabiner’s spine, look for a 2-digit year (e.g., "22" for 2022) or a full date code. Petzl uses a pictogram system with a circle clock. Black Diamond stamps the year directly. If you can’t find a date and don’t remember when you bought it, err on the side of retirement.
When should I retire a carabiner?
Retire a carabiner immediately if: the gate does not snap shut and lock reliably; there are grooves deeper than approximately 1mm from rope or webbing wear; there is visible corrosion, cracking, or deformation; or after any severe shock load (fall factor above 1). This checker also retires on age: 2 years daily use, 5 years weekly, 7 years monthly, 10 years as the ceiling, which is our conservative choice rather than a manufacturer limit.
Can a carabiner fail without visible damage?
Yes. Aluminium alloy carabiners can develop internal micro-cracks after severe shock loading that are invisible to surface inspection but significantly reduce load capacity. This is why retirement after any severe shock load (factor fall above 1) is recommended regardless of appearance.
What is a shock load on a carabiner?
A shock load occurs when a rope or sling suddenly becomes taut under a falling load. The peak force in the carabiner can be 3 to 4× the static weight of the load, lasting only milliseconds. A severe shock load occurs when the fall factor exceeds 1.0, meaning the carabiner experiences forces approaching or exceeding its design limits.
Are scratched carabiners safe to use?
Surface scratches from rock contact do not affect a carabiner's strength. They are cosmetic. What matters is the gate function, any grooves from rope wear on the spine, and any deformation. A heavily scratched carabiner with a smooth spine and perfectly functioning gate is safe to use within its age limits.
How often should I inspect carabiners?
Inspect carabiners before every climbing session. Test the gate: open and close it firmly to confirm it snaps shut instantly and locks completely. Run your thumb along the inside of the spine to feel for rope wear grooves. Look for corrosion (white powder on aluminium is superficial; pitting or black corrosion is cause for retirement).
Can I clean a carabiner?
Yes. Rinse with fresh water to remove salt, sand, and grit. Use mild soap if needed. Open the gate fully while rinsing to flush the hinge mechanism. Dry thoroughly before storage; moisture in the gate spring mechanism accelerates corrosion. A drop of silicone lubricant on the gate hinge can help, but avoid getting lubricant on the gate nose or spine where rope contact occurs.