Ironman cutoff times explained
Last updated June 2026 · ~6 min read
The cutoffs are the quiet pressure behind every long-course race. Miss one and your day ends — no matter how good you feel. Here's exactly how the swim, bike and overall limits work in 2026, and how to know in advance whether you'll make them.
The standard limits
Most Ironman-branded races use these cutoffs. Individual events vary, so always read your race's athlete guide — but this is the template:
| Checkpoint | Full · 140.6 | Half · 70.3 |
|---|---|---|
| Swim done by | 2:20 | ~1:10 |
| Bike done by | 10:30 | ~5:30 |
| Overall finish | 17:00 | ~8:30 |
How the swim cutoff works
For a full, you must be out of the water within 2 hours 20 minutes of the start. That's generous — roughly a 3:40/100 m pace covers 3.8 km in time — but a panicked, off-course swim can still catch people out. Sight well and swim straight. A 70.3 gives about 1:10.
How the bike cutoff works
The bike cutoff is the one that ends most days. On a full you must have finished the 112-mile bike by 10:30 into the race (so roughly 8 hours of riding after a 2:20 swim). Many races add intermediate bike cutoffs at specific points — miss one of those and you're pulled even if the final cutoff is hours away. Check your race's mid-course cutoffs before race day.
How the overall cutoff works
The famous one: 17 hours for a full Ironman, ending at midnight for a 7am start — the moment of the "You are an Ironman" finish-line call. The marathon also usually has its own mid-course cutoffs. A 70.3 typically closes the course around 8:30.
What happens if you miss one
You're removed from the course and scored DNF (did not finish). It's strictly enforced for athlete safety and course logistics. The good news: cutoffs are designed so that steady, well-paced age-groupers make them comfortably — blowing one is almost always a pacing or nutrition problem, not a fitness ceiling.
Will you make the cutoffs?
Don't guess on race morning. Put your realistic swim, bike and run splits into the checker and see your projected finish against every cutoff, with the margin:
Frequently asked questions
What is the Ironman time limit?
A full Ironman allows 17 hours overall, with a 2:20 swim and 10:30 bike cutoff along the way. A 70.3 typically allows about 8:30, with roughly a 1:10 swim and 5:30 bike cutoff.
Are cutoffs timed from my start or the gun?
From the gun — the official race start — so they're cumulative. Your finish time is chip-timed in a rolling start, but the intermediate and overall cutoffs run from the gun.
What happens if I miss a cutoff?
You're pulled from the course and recorded as a DNF. Missing the swim or bike cutoff ends your day there, and many races have mid-course bike and run cutoffs too.