Ukraine’s NATO accession requires unanimous approval from all 32 allies and typically follows years of verified reforms, interoperability gains, and security sector alignment under an adapted annual national program. The ongoing conflict with Russia, now in its fifth year, remains the dominant barrier, as membership during active hostilities would trigger Article 5 collective-defense obligations against a nuclear-armed adversary. Recent NATO summits have reiterated an “irreversible path” to membership without issuing an invitation or setting a timeline, while key allies continue to withhold support. Ukrainian officials, including former commander Valery Zaluzhnyi, have publicly cited gaps in military standards and technology as persistent obstacles. Trader consensus at 96.5% for “No” before 2027 reflects these structural and geopolitical constraints. A rapid negotiated settlement removing Russian objections or an unprecedented unanimous vote could still shift the outcome, though both appear remote within the remaining months of 2026.