Do professional painters do trim or walls first?

Do professional painters do trim or walls first? Professional painters typically follow a specific order to achieve clean lines and efficiency, and most pros paint trim first or do ceilings first, then walls, then trim last for final crisp lines, but practices vary. Common professional sequence is ceiling first, then trim, then walls, or ceiling, then walls, then trim with careful cutting. Many professionals paint trim first so they can tape trim and then paint walls with roller covering any trim paint overlap, or they paint walls first and then trim with brush for sharp edge. Most experienced painters prefer to paint trim second after walls because trim requires more precise brushwork and is easier to cut against wall than wall against trim, and any wall paint splatter on trim can be covered by trim paint which is usually semi-gloss and covers well. However, some paint trim first, then tape it off to protect while rolling walls. Overall, there is no single rule, but common pro order is prep, prime, ceiling, walls, then trim and doors for final detail, ensuring cleanest lines. Technique and taping preference determine order.