Patong: mostly paid, and it fills up
Patong’s beach-road area runs mostly on paid parking, and during busy evenings it fills before you’d expect. Side sois slightly back from Bangla or the beach road tend to have more luck than circling the main strip itself.
Old Town: free, but limited, and easy to miss
Phuket Old Town’s side streets around the Sino-Portuguese shophouses have genuinely free parking in places, but the spots aren’t always obvious or signed clearly, and they go quickly on weekend market days. If a spot looks free but you’re not certain, checking with a nearby shop is worth the thirty seconds.
Beaches: informal lots are the norm
Most beaches don’t have a formal car park — expect roadside spots or informal lots near the main beach access points instead, sometimes with someone directing you into a space for a small fee. That’s normal and not a scam by itself.
Watch for "private" lots that aren’t quite official
Some paid parking around the busiest beaches and nightlife strips is run informally on land that isn’t clearly the operator’s to charge for — it doesn’t always mean anything is wrong, but if a price feels arbitrary or a "lot" is just an empty patch of dirt with someone collecting cash, trust your judgement and look for a more clearly marked option nearby if one exists.
Photograph where you parked
A quick photo of the spot — street sign, a nearby landmark, the space itself — costs nothing and saves the occasional confused ten minutes later, especially in areas where every soi starts to look the same after a day at the beach.