Climbing Harness Lifespan by How Often You Climb
Between one and three years of regular climbing, and ten years from the date of manufacture as an absolute ceiling even for a harness still in its bag. Those are the two clocks, and the shorter one always wins. The calculator on this page runs from 10 years unused down to 1 year at daily use.
| Use | Retire after |
|---|
| Never used | 10 years |
| Rarely, a few times a year | 7 years |
| Monthly | 5 years |
| Weekly | 3 years |
| Daily | 1 year |
These are the figures the calculator above uses. Age runs from the date of manufacture, not the date you bought it, and the shorter of the two limits always wins.
Where these numbers come from
The ten year ceiling is the manufacturers' figure. Petzl and Black Diamond both give plastic and textile products a maximum of ten years from the date of manufacture, a harness among them. The shorter figures for regular use are ours. No standard and no manufacturer publishes a table of years by usage frequency, and EN 12277 and UIAA 105 are product test standards that say nothing about age, so we set a conservative ladder rather than leave the question blank. Read the result as a prompt to inspect the harness, not as a deadline somebody else has certified.
Harness Inspection Checklist
Work three zones, in this order: the tie in points and belay loop, then the load bearing webbing and its bar tack stitching, then the buckles. Run this before every session, and again after anything unusual. If a single check fails, the harness is retired. There is no partial pass on load bearing gear.
Webbing wear at the tie in points
The tie in points and the belay loop take almost all of the wear. Look for fuzzing that has gone beyond surface fibres, for any place where the weave pattern is broken, and for a visibly thinner section. Many harnesses have a coloured wear indicator woven under the surface at the tie in point: if you can see that colour, the harness is finished. Retire it.
Stitching, buckles and the belay loop
Follow every line of bar tack stitching, especially where the belay loop is sewn and where the leg loops meet the waist. Any pulled, cut or missing stitches retire the harness; stitching is not repairable at home and a restitched harness is not a certified harness. Work the buckles: they should thread and hold without slipping under a firm pull, and any cracked or deformed buckle ends the harness even if the webbing is perfect.
Sun, chemicals and grit
Nylon loses strength to ultraviolet and to chemicals without changing appearance much. A harness that has spent seasons on the outside of a pack, or been stored near solvents or battery acid, is retired regardless of how it looks. Grit ground into the weave cuts fibres from the inside; wash a gritty harness in clean water rather than leaving it loaded with sand.
Wear Indicators: The Built In Retirement Signal
If you can see the indicator colour, the harness is finished. Many modern harnesses have a contrasting thread woven just below the surface of the belay loop and the tie in points, so that when abrasion has taken away enough of the outer fibres the colour underneath shows through. Petzl, Black Diamond and Metolius all build this into harnesses, and it is the closest thing climbing gear has to a warning light: it removes the judgement call from the one place on the harness that wears fastest.
Two things worth knowing about it. First, an indicator that has started to show is not a countdown, it is the end: the harness goes out of service that day, not at the end of the season. Second, not every harness has one, and its absence tells you nothing good or bad. On a harness without indicators you are back to looking and feeling, which is what the three zones above are for.
After a Big Fall or Shock Load
Inspect the whole harness, and if anything at all leaves you unsure, retire it. A hard fall loads the tie in points, the belay loop and the waist webbing in a way that normal climbing does not, and the damage does not have to be visible from the outside. Work through all three zones rather than glancing at the spot you think took the load.
Petzl lifetime FAQ lists a serious fall or load as a reason to retire a product on its own, without waiting for an inspection to fail, alongside not knowing an item's full history and any doubt about its condition. That is the standard we would apply here too. To judge how hard a given fall actually was, work it out with the fall factor calculator.
What Petzl and Black Diamond Say About Harness Lifespan
Both put a ten year ceiling on textiles, counted from the date of manufacture rather than the date you bought it. Petzl lifetime FAQ gives plastic and textile products a maximum lifetime of ten years from manufacture and states that metal products have no age limit of their own. Black Diamond says the same in its product instructions: plastic and textile items are retired at ten years from manufacture even if they were never used, while age alone does not retire metal hardware.
Under that ceiling sits the figure that actually decides most harnesses. Manufacturer guidance puts typical service at one to three years of regular climbing, which is what the calculator on this page works from at weekly and daily use. Petzl also recommends a detailed inspection at least every twelve months on top of the check you do before each session, and the retirement conditions it lists are worth repeating: a serious fall or load, failing an inspection, any doubt about condition, an item whose history you do not fully know, and equipment made obsolete by changes in standards or technique.
The harness standard referenced across this site is EN 12277, alongside UIAA 105. We name them rather than restating what they contain. 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.
Does a Climbing Harness Expire?
Yes, on two clocks at once, and the shorter one wins. The calculator sets 10 years from manufacture as the outside limit even for a harness still in its bag, because the nylon ages on its own, and it shortens that as use goes up: 5 years for monthly climbing, 1 year for daily. It is the date of manufacture that counts, not the date you bought it, and Petzl is explicit about that distinction: a harness that sat two years in a shop is two years into its ten. The date is on the label sewn inside the waistbelt, next to the serial number. A single hard fall, or any fall that leaves the harness marked, retires it before any of those numbers. The harness standard referenced across this site is EN 12277, alongside UIAA 105.
Retire It Today, No Inspection Needed
Some findings end the discussion. If any of these apply, take the item out of service now, mark it so nobody puts it back on a rack, and replace it.
- A visible wear indicator at a tie in point.
- Any cut, pulled or missing stitch, anywhere.
- A cut or abraded load bearing webbing strap, anywhere on the harness.
- A damaged belay loop, at any severity.
- Melted or glazed fibres, which mean heat has already taken the strength out.
- A cracked buckle, or one that slips under a firm pull.
- Contact with acid, solvent or bleach, even if it looks untouched.
- A hard fall that left marks, or any fall you are unsure about.
- Unknown history: a harness bought used, borrowed from an unknown source, or found.
The retirement figures here come from the calculator on this page, and the harness standards referenced across this site are EN 12277 and UIAA 105. 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.
A harness is one part of the chain. Check the rest: rope, carabiners, slings and helmet. To judge whether a fall was severe enough to matter, use the fall factor calculator.
Frequently asked questions
How long does a harness last climbing?
One to three years of regular climbing, and ten years from the date of manufacture as the outside limit even for a harness that has never been used. The calculator on this page works from 10 years unused, 7 for a few outings a year, 5 for monthly, 3 for weekly and 1 year for daily climbing. Petzl and Black Diamond both set the ten year ceiling for textile products, counted from manufacture rather than purchase.
What are harness wear indicators?
A contrasting thread woven just below the surface of the belay loop and the tie in points. When abrasion has taken away enough of the outer fibres, the colour underneath shows through, and that means the harness goes out of service that day. Petzl, Black Diamond and Metolius all build them in. Not every harness has one, and its absence tells you nothing either way: on a harness without indicators you inspect by eye and by feel instead.
Can I use a second hand harness?
No, unless you know its full history from new. Not knowing what a harness has been through is itself a reason to retire it under the conditions Petzl publishes, alongside a serious fall, a failed inspection and any doubt about condition. A harness can be shock loaded, stored next to battery acid or left in the sun for a season without showing a mark, and none of that is recoverable by inspection.
When should I retire my climbing harness?
Retire your climbing harness immediately if it has visible damage (frayed webbing, cut straps, damaged stitching, cracked buckles), after any severe fall or impact load, or when it exceeds the retirement age this checker applies for your usage frequency: 1 year with daily use, 3 years weekly, 5 years monthly, 7 years rarely, 10 years maximum regardless of use. When in doubt, retire it.
How long does a climbing harness last?
The schedule this checker applies runs 1 year for daily use, 3 years for weekly use, 5 years for monthly use, 7 years for occasional use, and 10 years for a harness that has never been used outdoors. These are maximums. Physical damage or severe falls require retirement regardless of age.
Can I use a harness after a big fall?
If the fall generated a severe impact load on the harness, particularly through the belay loop, the harness should be inspected carefully or retired. Unlike ropes, harnesses do not have a simple fall factor metric. Any fall that felt unusually hard, resulted in injury, or left visible marks on the harness warrants careful inspection and possible retirement.
What harness damage requires immediate retirement?
Retire immediately if: any load-bearing webbing is cut, frayed through to the core, or shows a flat spot; any stitching bar tack is broken, missing, or significantly worn; any buckle is cracked, bent, or fails to lock reliably; or if the harness has been contaminated with chemicals such as battery acid, bleach, or industrial solvents.
Does an unused harness expire?
Yes. Petzl and Black Diamond both cap plastic and textile products at ten years from the date of manufacture regardless of use, and a harness is a textile product. Nylon and polyester webbing degrades over time through UV exposure and humidity cycling even in storage. An unused harness that is 10 or more years old should not be used for climbing.
How do I store a climbing harness?
Store harnesses in a bag away from direct sunlight, heat, and chemicals. Avoid storing in car boots where UV, heat, and chemical fumes (fuel, battery acid) can accelerate degradation. Do not hang harnesses on sharp hooks that could create pressure points on webbing. Store in a cool, dry, dark place.