https://truckstopinsider.com/2026/07/11/owner-operators-2026-retirement-edge-how-solo-401ks-can-shelter-up-to-72000-while-w-2-drivers-hit-a-lower-ceiling/ TruckStop Insideren-US 2026-07-11T10:03:04+00:00 Owner-Operators’ 2026 Retirement Edge: How Solo 401(k)s Can Shelter Up to $72,000 While W‑2 Drivers Hit a Lower Ceiling