Everest With vs Without Supplemental Oxygen

By Blake Penson, Experienced mountaineer · Everest summiteer · Seven Summits climber · 20 years in the mountains · Industry expert
Last updated: 20 October 2026

Short answer: Almost everyone who summits Everest uses supplemental oxygen, usually from around Camp 3 (about 7,100 m) upward. Climbing without it is a different sport: summit rates fall sharply and the risk of cerebral and pulmonary oedema, frostbite and fatal exhaustion rises. Oxygen is built into published 2027 fees of US$41,000–US$145,000; extra bottles are a common add-on within extras of US$12,000–US$39,500. ^[1][2]

Short answer, in my words

I used oxygen on Everest, and I'd tell almost anyone to do the same. Bottled oxygen at 2–4 litres a minute makes the summit feel more like 7,000 m: you're warmer, you think more clearly and you have a reserve if something goes wrong. Without it, every decision is slower and every mistake is bigger.

Here's how oxygen is priced into expeditions, what the trade-offs are, and who, if anyone, should consider going without.

Who is this guide for?

Everest climbers deciding on an oxygen plan, and anyone comparing oxygen allowances between operators.

What Everest costs in 2027: the full breakdown

These are the same figures I use on my Everest cost page, so every Everest page on this site adds up the same way. The operator fee includes the US$15,000 spring permit on almost every commercial team ^[6]. Extras add US$12,000 at the low end, US$23,000 typically and US$39,500 at the high end, for an all-in total of US$53,000–US$184,500.

How I read those columns: low is someone who already owns their kit, books early and flies on a sale fare; high is a first-timer buying everything new with a buffer for delays. Most people I advise land near the typical column.

Everest operators with published 2027 prices

These are the prices each operator publishes on its own website, per person, checked on 20 October 2026, sorted from cheapest to most expensive. It's a list, not a ranking, and inclusions differ, so read the small print before comparing numbers. Operators that only quote on enquiry are left out because I can't verify them.

The spread is normal: local operators have lower overheads, while Western-led teams add an international guide, smaller groups and more support. I'd shortlist two or three teams across the range, then decide on leadership, ratios and reviews rather than price alone.

With vs without oxygen

How oxygen is priced

Packages include a set number of bottles, a mask and a regulator. Budget teams commonly include about 5–6 bottles; premium teams more, with higher flow and spare systems ^[11][13]. Extra bottles are charged per bottle, which is why I budget US$0–3,500 for extra oxygen in my breakdown.

Who should consider going without?

Only climbers with several 8,000 m summits without oxygen, a team that supports the plan and a strict turnaround. Even then, most carry an emergency bottle.

Altitude, health and insurance

Before any high-altitude trip I'd see a doctor who understands altitude, and read the UIAA Medical Commission's advice ^[1] and the CDC's guidance on altitude illness ^[18]. On Everest the main risks are acute mountain sickness and, if you go up too fast, high-altitude cerebral or pulmonary oedema. Make sure your insurance explicitly covers trekking or climbing at your maximum altitude and includes helicopter evacuation; a Global Rescue annual medical membership was US$385 in 2026, with its high-altitude package adding US$495 ^[19][5].

Hidden costs that catch people

These are the costs I see people forget most often.

• Extra bottles. Charged per bottle.
• Mask and regulator failures. Make sure spares are carried.
• Sherpa carries. More oxygen means more carries, which can raise the fee.
• Rescue oxygen. Ask how much reserve is stocked at the South Col.

How to save money without cutting safety

• Don't save money on oxygen. Save on comfort instead.
• Ask for oxygen numbers in writing before comparing prices.
• Book early: many operators publish early-booking prices or fill their cheapest departures first.
• Buy or rent quality secondhand gear, but never skimp on boots, gloves or a sleeping bag rated for the conditions.
• Pay deposits by credit card and buy cancellation cover the day you pay.
• Compare inclusions line by line; a cheaper headline price with more exclusions often ends up dearer.
• Never save money on guide ratio, insurance or acclimatisation days.

Questions I would ask any operator before paying a deposit

1. Who is my expedition leader, and how many Everest summits do they have?
2. What is the summit-day Sherpa ratio, in writing?
3. How many oxygen bottles per climber, at what flow rate, and how many reserves are stocked at the South Col?
4. What is the turnaround time and who enforces it?
5. Is the summit bonus compulsory, and how much is it?
6. Who pays if the route or permit is closed?
7. What is excluded from the price?
8. Which forecaster do you use?
9. Is there a doctor at base camp?
10. Can I speak to two clients from last season?

Where prices are heading for 2027

Nepal raised the spring royalty from US$11,000 to US$15,000 on 1 September 2025 ^[6][20]. Sherpa wages, insurance and helicopter costs keep rising, while competition keeps the budget tier around US$41,000–54,500. I expect most 2027 prices to hold, with 3–10% rises for 2028.

My booking timeline

1. 12 months out: shortlist two or three operators, read verified reviews and ask the questions above.
2. 9–12 months out: pay the deposit by credit card and buy cancellation cover the same day.
3. 6–9 months out: start structured training and book changeable international flights.
4. 3–6 months out: buy or rent gear, test it on a training trip, and confirm insurance covers your maximum altitude and evacuation.
5. 1–3 months out: pay the balance, confirm permits and inclusions in writing, and taper training.
6. Departure: carry cash for tips and fees, and copies of your insurance and permits.

Other sources I checked for this page: The Himalayan Database – expedition and ascent records ^[21].

My verdict

Use oxygen. Compare operators on bottles per climber, flow rate and reserves before you compare price. Going without is for a tiny number of very experienced climbers.

Want verified client reviews before you book? See ExpedReview: Everest success rate · ExpedReview: Everest deaths · ExpedReview: Everest cost and review data.

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