Used amphibious excavators sell for $9,043 to $235,000 across global listings, with Cat 320 class machines from 2018 to 2023 clustering at $28,000 to $47,530 and a 2022 Sany SY205C at $73,800. A new 2026 machine was listed at $274,562. If you already own an excavator, the pontoon undercarriage alone costs $29,000 to $72,000 FOB, most commonly $53,000 to $62,000. There is effectively no amphibious excavator rental market, which is why conventional excavator rates of $719 to $3,000 a day matter to this decision.
| Grade / Item | Low | High | Unit |
|---|---|---|---|
| Used, global listings | $9,043 | $235,000 | USD used |
| Cat 320 class, 2018-2023 | $28,000 | $47,530 | USD used |
| Sany SY205C, 2022 | $73,800 | $73,800 | USD used |
| New 2026 listing | $274,562 | $274,562 | USD new |
| Pontoon undercarriage set | $29,000 | $72,000 | USD FOB |
| Pontoon set, common band | $53,000 | $62,000 | USD FOB |
| Conventional excavator, daily | $719 | $3,000 | USD/day |
| Conventional 30-50t, monthly | $12,000 | $25,000 | USD/month |
| Country | Typical Range | Per Tonne | Cur. |
|---|---|---|---|
| United States | Baseline rates shown | n/a | USD |
| Canada | About 5 to 15% above US | n/a | CAD |
| United Kingdom | About 0.75 to 0.85x US in GBP | n/a | GBP |
| Germany / EU | Broadly comparable to US in EUR | n/a | EUR |
| Australia | About 20 to 40% above US | n/a | AUD |
| India | About 30 to 50% of US rates | n/a | INR |
| UAE / Dubai | About 60 to 80% of US rates | n/a | AED |
Amphibious excavator prices
| Item | Price | Notes |
|---|---|---|
| Used, full global listing range | $9,043 to $235,000 | Condition and origin vary enormously |
| Cat 320 class, 2018 to 2023 | $28,000 to $47,530 | The common used band |
| 2022 Sany SY205C | $73,800 | Verified listing |
| New, 2026 listing | $274,562 | Single listed new machine |
| Pontoon undercarriage set, FOB | $29,000 to $72,000 | Conversion route |
| Pontoon set, common band | $53,000 to $62,000 | Where most quotes land |
The gap between $9,043 and $235,000 is not noise, and it is not all condition. The low end of this market is machines sold out of Southeast Asia, often with limited documentation, sold FOB, and needing work on arrival. The high end is a recent machine from a known dealer with a warranty. Both are listed as amphibious excavators. Landed cost on a cheap import routinely adds 30 to 50 percent, and pontoon structures that have spent years in saltwater or acidic swamp water can be corroded in ways that are expensive to fix.
The conversion route
This is the option most buyers do not know about and it changes the math substantially.
An amphibious excavator is a standard excavator upper structure mounted on a pontoon undercarriage. The pontoons are two sealed steel floats with track chains running around them. Manufacturers in China and Southeast Asia sell the undercarriage on its own, and a conventional excavator can be converted onto it.
At $53,000 to $62,000 for the common band, if you already own a suitable excavator that is otherwise underused, conversion is far cheaper than buying a purpose-built machine. The conditions are that the excavator has to be a compatible weight class, the conversion has to be engineered properly rather than bolted on, and the upper structure was designed for stable ground rather than a floating platform, so stability and hydraulic settings need attention.
The counterpoint is that a converted machine is committed. Swapping back and forth between pontoon and standard undercarriage is a workshop job, not something you do between sites.
Why there is no rental market
General rental yards do not stock amphibious excavators. The demand is concentrated in dredging, wetland restoration, canal and drainage maintenance, oil and gas access in swamp, and mining tailings work, and firms in those fields own their machines. Transport is also awkward, since pontoon undercarriages are wide and often need permits or partial disassembly.
That absence is why conventional excavator rental rates are the relevant comparison. A standard 30 to 50 tonne excavator rents for $719 to $3,000 a day, or $12,000 to $25,000 a month. If your site can be made workable with mats, causeways or a temporary haul road plus a conventional machine, that is usually the cheaper path.
| Alternative | Cost | When it works |
|---|---|---|
| Conventional excavator, daily | $719 to $3,000 | Ground can be matted or drained |
| Conventional excavator, monthly | $12,000 to $25,000 | Longer wetland-edge work |
| Long-reach excavator from bank | Similar to conventional plus premium | Narrow channels, reachable from shore |
| Barge-mounted excavator | Barge hire plus excavator | Open water with sufficient depth |
| Amphibious machine | Purchase or conversion | Soft ground too wet to mat, too shallow to float a barge |
That last row is the real use case. Amphibious excavators earn their cost in the specific band where the ground will not support a matted conventional machine and the water is too shallow for a barge. Outside that band, something cheaper does the job.
What drives the price
Base machine size. A 20 tonne class machine on pontoons costs far less than a 35 tonne class one, and pontoon size scales with it.
Pontoon construction. Steel thickness, compartmentalisation and coating quality. A well-built pontoon has multiple sealed compartments so one breach does not sink the machine. A cheap one does not. Ask.
Spud poles and side pontoons. Optional extensions that add stability for dredging work and cost extra.
Corrosion protection. The single biggest determinant of used value. Saltwater and acidic water eat pontoons. Inspect the underside, the compartment seams and the track frame welds.
Operating costs people underestimate
- Transport. Wide loads, permits, and often removing side pontoons for the move.
- Track wear. Pontoon track chains and rollers run in abrasive silt and wear faster than most buyers expect.
- Corrosion maintenance. Annual inspection, recoating and weld repair are ongoing, not optional.
- Recovery. A stuck or sunk amphibious machine is a genuinely expensive problem in a location with no road access.
- Permits. Wetland work in most jurisdictions requires environmental permitting, and that timeline often exceeds the equipment lead time.
Getting a fair quote
State water depth, bottom firmness, required reach and the duration of the work. Ask whether the pontoons are compartmented and how many compartments, what the coating specification is, and what the machine has been working in. On an import, ask for the landed and commissioned price rather than FOB, and get a third-party inspection before payment. On a conversion, confirm the pontoon supplier has done your exact excavator model before.
Rates move with regional demand and fuel. Figures here are dated August 2026. Confirm locally before you book.