States planning for 2027 do not have to guess what happens when a Medicaid work requirement goes live. They have a real-world test: Arkansas, which in 2018 became the first state to implement one. Within months, roughly 18,000 people lost coverage. The lesson was not about who was working. It was about how coverage gets lost.
The losses were procedural, not substantive
Studies of the Arkansas rollout found that most people who lost coverage were not ineligible. Many were already working enough hours, or qualified for an exemption, but failed to report it in the way the system required. Some never understood that a new rule applied to them. The reporting portal was online-only at first, in a state with significant rural broadband gaps. Awareness was low; a large share of affected enrollees did not know the requirement existed.
This is the core finding that should shape every 2026 implementation plan: the failure mode is communication and friction, not employment. People lose coverage because of paperwork, deadlines, and confusion, what researchers call procedural disenrollment.
The 1-in-4 framing and why it matters
Among the population subject to the Arkansas requirement, coverage loss reached roughly one in four people in the affected age group over the implementation period. When you tell a Medicaid director that a quarter of a subject population could churn off in the first wave, the conversation shifts from compliance mechanics to retention engineering.
The Arkansas program was ultimately halted by a federal court, so the long-run effects were never fully observed. But the early data is the clearest natural experiment available, and it points in one direction: the make-or-break variable is whether members understand what to do and have a low-friction, multiple-channel way to do it.
For states standing up H.R.1 requirements, the Arkansas precedent argues for three things up front: aggressive, plain-language awareness campaigns before any deadline; reporting options beyond a single online portal, including phone and in-person assistance; and pre-population of data the state already holds, so people are not asked to re-prove things the agency can already see.