<p>We investigate how spin–orbit coupling reshapes the equilibrium thermodynamic and magnetic properties of a two-dimensional parabolic quantum dot subjected to external electric and magnetic fields. Within a single-electron effective-mass description based on the Fock–Darwin framework, Rashba and Dresselhaus spin–orbit interactions are incorporated to account for electric-field-induced spin splitting and level mixing. The resulting spectral restructuring generates avoided crossings that modify entropy, specific heat, magnetization, and magnetic susceptibility in the low-temperature regime. We show that gate-tunable Rashba coupling enables direct electrical control of entropy and magnetic response without the need for magnetic impurities. In addition, the spin–orbit–modified entropy landscape produces a qualitatively reshaped magnetocaloric response, including broadened entropy-change regions and inverse magnetocaloric behavior at low temperature. These results identify spin–orbit coupling as an effective tuning parameter for equilibrium thermodynamics in quantum-confined systems.</p>