Regular cleaning is maintenance
If the home is already in reasonable shape, recurring cleaning keeps kitchens, bathrooms, floors, dust and high-use areas from drifting backward.
Deep cleaning is a reset
If buildup has accumulated, the home has not been professionally cleaned in a long time, or you want extra detail before starting recurring service, a deep clean is usually the better first step.
The condition matters more than the calendar
A home does not automatically need a deep clean because it has been three months. Likewise, a heavily used home may need extra attention sooner. Describe the condition and the priorities honestly so the estimate can match the work.
Start deep, then maintain
One practical approach is a detailed first visit followed by recurring maintenance at the frequency that suits the household.