Yes, all five aggregates occur simultaneously in every moment of conscious experience according to Buddhist teaching.
The five aggregates, or skandhas, are the components that make up a person or any sentient being. They are form (physical matter and bodies), sensation (pleasant, unpleasant, or neutral feelings), perception (recognition and labeling of objects), mental formations (thoughts, intentions, and emotions), and consciousness (awareness itself). The Buddha taught these in the Discourse on the Aggregates (Khandha Sutta) and many other early texts.
These five are not separate spiritual levels or stages you progress through. Rather, they are always present together in the basic structure of experience.
Consider a simple moment: you see a cup on a table. In that single instant, all five aggregates function together. Form exists as the physical cup and your sensory organs. Sensation arises as the neutral feeling of seeing something ordinary. Perception identifies and labels it as "a cup." Mental formations include your thought that you might drink from it later. Consciousness is the basic awareness that ties this all together.
This is not a sequence of steps but a unified occurrence. The aggregates are always co-present in conscious experience. You cannot experience one without the others simultaneously operating.
The Pali Canon describes the aggregates as interdependent and mutually arising. The Samyutta Nikaya emphasizes that you cannot separate these components in actual experience—they always appear together. The Buddha taught that clinging to any one aggregate as a permanent self is a fundamental mistake, but he was clear that all five are present in every moment of experience.
The later Abhidhamma tradition, which provides detailed phenomenological analysis, breaks down experience into very small moments of consciousness (cittas). Even in these microseconds, all five aggregates function together, though with different intensities and qualities.
Theravada Buddhism maintains the classical view that all five aggregates operate in every conscious moment. Mahayana schools generally agree on this point, though they may emphasize different aspects philosophically. Tibetan Buddhist traditions similarly affirm that form, sensation, perception, mental factors, and consciousness are always co-present in experience.
Where traditions differ is not on whether simultaneity occurs, but on how to analyze and understand the nature of that simultaneity—particularly in advanced meditation states where the mind becomes very refined. However, even in deep absorption states, the aggregates remain present, though some appear dormant or inactive.
Understanding that all five aggregates arise together is crucial for Buddhist practice. It means you cannot get rid of form while maintaining consciousness, nor can you experience sensation without perception. This is why the Buddhist path involves developing wisdom about how these aggregates work together, not trying to eliminate them individually.
When you meditate and observe your experience, you are always observing a complex arising of all five. This integrated understanding is part of what leads to insight into the impermanent and non-self nature of existence.