How to Bid an Interior Painting Job
Interior painting bids typically run $2–$6 per square foot of wall space, or $300–$800 per average room, depending on paint quality, number of coats, and prep needed. Ceilings, trim, and doors are usually priced as separate line items rather than folded into wall pricing, since they take meaningfully different time and often need a different paint sheen.
Base pricing: per square foot or per room
$2–$6 per square foot of wall space is the common range, translating to roughly $300–$800 per average room depending on size, paint quality, and coat count. The spread inside that range comes down to what the walls need before paint goes on, not just how much paint they need.
What isn’t included in wall pricing
Three things regularly get bid separately from the wall square footage:
- Ceilings. Overhead work is slower, and ceilings are almost always a different, flatter sheen than the walls.
- Trim and doors. Cutting in and multiple coats on a small surface area make this detail work, priced per door or per linear foot of trim rather than folded into the wall rate.
- Prep work. Patching holes, sanding, and priming over a dark or glossy prior color add real time before the visible painting even starts.
Walk the room before you bid
A phone description and a walk-through can produce very different numbers. Scuffing, nail holes, water stains, and how dark the existing color is all change the prep time — see the room, or ask for photos, before naming a price you’ll have to honor.
Color changes cost more than same-color repaints
Going from a dark or saturated color to a lighter one — or vice versa — often needs an extra coat or a tinted primer that a same-color refresh doesn’t. Price the coat count you’ll actually need, not the two-coat default, once you know the before and after colors.
Put the breakdown in the estimate
List walls, ceiling, and trim/doors as separate lines even in a flat-bid estimate. It’s the reference both sides use if the scope changes mid-job — say, the customer decides to add the closet after all.
Frequently asked questions
Should ceilings be priced the same as walls?
No — ceiling work is slower due to overhead angles and usually a different (flat) sheen, so it's priced as its own line rather than the same per-square-foot rate as walls.
How much does prep work add to a bid?
A room with holes to patch, heavy scuffing, or a color change requiring extra coats can add significant time over a straightforward repaint — walk the room before bidding, don't quote from a description alone.
Do trim and doors need separate pricing?
Yes. Trim and doors are detail work — cutting in, taping, multiple thin coats — and take disproportionately long relative to their square footage, so a flat per-door or per-linear-foot trim rate is standard.