Alone is where this breed's ancestors worked
A Kuvasz left alone for a workday is not enduring an unnatural situation. He is doing a version of the only job his breed was ever shaped for. Hungarian shepherds left Kuvasz dogs with flocks for long stretches, expecting the dog alone to assess threats, decide, and act, with no handler directing him. That selection produced a large, white, self-contained guardian who bonds profoundly to his family and charges, yet does not need people present to feel his day has a purpose.
So the verdict is yes, qualified by scale and role rather than by loneliness. The questions to answer are not whether he can cope without you, but what he will do with the house and land while you are gone.
A guarding dog alone still guards
Give a Kuvasz an empty house and he assigns himself the perimeter. Expect position changes between vantage points, close attention to the gate and front boundary, and barking with genuine carrying power at delivery drivers, loose dogs, and unfamiliar pedestrians. In a rural setting that is the breed working as intended. In a suburb, it is the single most likely source of complaints, and no amount of morning exercise fully switches it off, because guarding is not excess energy. It is the job.
Plan for it honestly: solid fencing he cannot see through at the most stimulating boundary often lowers the commentary, a resting area away from the front line helps, and neighbours forewarned by a conversation fare better than neighbours surprised. A Kuvasz who can see a busy pavement all day has been posted on sentry duty all day.
Fencing and space, judged at guardian scale
Containment advice written for ordinary pet dogs undersells this breed. A Kuvasz is a powerful dog of considerable size who can dig seriously, lean on panels with real weight, and clear or climb more than his bulk suggests. Walk the boundary looking for what a determined guardian could move, and give him a defined territory: access to a secure yard and a draught-free indoor rest area is a better shape than unsupervised run of an entire property with several gates to test.
His thick double coat also makes a warm, unventilated house or sun-baked yard a poor solo setup in summer. Shade, airflow, and plentiful water are working conditions for a dog on duty, not comforts.
Midday people need a guardian's introduction
Do not hand a house key to a rotating cast of walkers and expect a Kuvasz to grade them kindly. A guardian judges strangers by his own criteria, and an unintroduced visitor entering his territory midday is a scenario to design out entirely. Choose one trusted person, introduce them properly over several meetings while you are home, and keep that arrangement stable. Many Kuvasz dogs, adult and settled, manage the full day without a midday visit at all, which suits the breed's temperament better than a stranger's interruption.
Duties written for a dog who works unsupervised
Because a Kuvasz household runs on several people's contributions, from the dawn boundary walk to the evening feed, KinsLe's Care Teams keeps those jobs explicit: each duty for your Kuvasz is assigned to a named person and shown as completed to the rest of the household and carers, so the fencing check and the water top-up happen on record, not on assumption.