This is the single most common sizing question we get, and the answer almost never comes down to digging power. It comes down to the narrowest gap the machine has to pass through and what your truck can legally tow.
Buy for access first. A machine that cannot reach the backyard digs nothing, no matter how impressive the spec sheet reads.
Gate access under 40 inches or digging shallower than 6 feet: buy the 1-ton class and enjoy the easy trailering. Footings, septic, or any hole past 7 feet: buy the 2-ton class and budget for the heavier truck and trailer.
A standard residential gate is 36 inches. Only 1-ton class machines with retractable tracks reliably clear it. From 1.5 tons up you are removing a fence section or reaching in from the driveway.
Measure your tightest access point before you shop. It eliminates more machines than budget does.
Footings, septic and stormwater lines routinely need 7 to 9 feet. A 1-ton machine cannot get there, and no amount of operator skill changes that. If those jobs are on your list, the 2-ton class is the floor, not the upgrade.
If your work is irrigation, landscape beds, small drains and post holes, the 1-ton class does it faster because it moves and trailers so easily.
A 1-ton machine trailers behind a half-ton pickup on a light utility trailer. A 2-ton machine plus trailer pushes past 7,000 pounds — that is a 3/4-ton truck and a dual-axle deck. Buyers routinely forget to price this and it is thousands of dollars.
A 1-ton class machine with retractable tracks narrows to roughly 30–36 inches and clears a standard 36-inch residential gate. Anything larger generally does not.
Around 5.5 to 6.5 feet depending on model. If you need 7 feet or more, step up to the 2-ton class.
It needs a dual-axle trailer and a 3/4-ton tow vehicle once you add the deck weight. Price that in before you compare machine stickers.