Interior Paint Cost Guide 2026

Quick Answer: Interior paint commonly runs $30 to $70 per gallon as of 2026 for a quality pro grade, with budget lines at $20 to $35 and premium designer lines at $70 to $110. Primer adds $20 to $50 per gallon. Your real price moves with paint grade, sheen, color depth, volume, region, and the titanium dioxide commodity index, so use these ranges as a starting point and pull current quotes for the bid date.

What Drives the Price of Interior Paint

Interior paint is pigments, binders, resins, and solvents in water based acrylic or latex form. The cost per gallon moves with grade, sheen, color, volume, and freight, and understanding each helps you bid accurately.

Paint grade: Builder grade flat runs $20 to $35 per gallon. Pro grade, the workhorse for residential repaint and new construction, sits at $30 to $50. Premium and designer lines from Benjamin Moore, Sherwin Williams, and Farrow and Ball run $70 to $110 per gallon, and deep base premium colors run higher still.
Sheen: Flat is cheapest and hides wall flaws. Eggshell and satin add $2 to $6 per gallon over flat. Semi gloss and gloss for trim and doors run $5 to $10 higher per gallon because they use harder resins.
Color depth: Whites and pastels use less pigment and sit at the low end of a line. Mid tones add $2 to $5 per gallon. Deep base and dark accent colors need more pigment and tint, adding $5 to $12 per gallon. Custom matched colors at the pro desk may carry a tint fee of $3 to $8 per gallon.
Primer: Primer is a separate line item, not part of the wall paint cost. PVA primer for new drywall runs $20 to $35 per gallon. Stain blocking primers like Kilz, BIN shellac, and oil based CoverStain run $25 to $50 per gallon. Bonding primer for glossy surfaces runs $40 to $65.
Volume: Single gallon retail carries the highest markup. Five gallon buckets drop the per gallon price 8 to 15 percent. Contractor accounts with annual volume get another 10 to 25 percent off list and rebates of 2 to 5 percent on annual spend.
Region and brand: Sherwin Williams and Benjamin Moore dominate the pro channel in most US markets, and pricing is set by the local store network. Expect 10 to 20 percent swings between markets and brands for the same grade.
Commodity index: Titanium dioxide is the main white pigment and a traded commodity. When TiO2 rises, white and light paint prices follow within a quarter. Acrylic resin and solvent costs also move the base price.

Typical Price Ranges by Grade

Use these ranges for residential and light commercial work as of 2026. They assume pro grade paint bought at a pro paint store or building supply house on a contractor account, not single gallon retail.

Builder grade flat: $20 to $35 per gallon. New construction walls, rental turnover.
Pro grade eggshell or satin: $30 to $50 per gallon. The default for living areas and bedrooms.
Pro grade semi gloss: $40 to $60 per gallon. Trim, doors, cabinets, and high wear walls.
Premium designer lines: $70 to $110 per gallon. Benjamin Moore Aura, Sherwin Williams Emerald, Farrow and Ball.
Acrylic latex ceiling paint: $25 to $45 per gallon, flat and low splatter for ceilings.
PVA drywall primer: $20 to $35 per gallon. One coat over new drywall and skim coats.
Stain blocking primer: $25 to $50 per gallon. Shellac, oil, and water based stain blockers.
Bonding primer: $40 to $65 per gallon. For glossy or hard to bond surfaces.

For a 2,000 SF house with 8 foot ceilings, figure roughly 2,000 to 2,400 paintable SF of walls plus 1,600 SF of ceilings. At 350 SF per gallon per coat, that is 6 to 8 gallons per coat of wall paint and 5 to 6 gallons of ceiling paint, doubled for two coats. Budget $450 to $900 in paint alone before primer, tape, and labor.

How to Calculate the Quantity You Need

Gallons equals paintable square footage divided by coverage. Most pro grade paints cover 350 to 400 SF per gallon on smooth walls, less on textured or porous surfaces. Figure 250 to 300 SF per gallon on rougher textures. Deduct openings over 4 SF, then add for two coats by doubling the single coat figure.

Add a 10 percent waste factor for roller loading, cut in waste, touch up, and leftover. Round up to the next five gallon bucket or full gallon. A tighter 7 percent waste factor is realistic on square rooms with an experienced crew, but bump to 12 to 15 percent on jobs with deep colors, heavy texture, or a lot of cut in around trim.

Tie each paint quantity to the takeoff sheet by area, sheen, and color. A single job often mixes flat on ceilings, eggshell on walls, semi gloss on trim, and a primer undercoat. Do not lump them into one line or you lose the ability to value engineer later.

How to Buy Smarter

Open a contractor account at two pro paint stores. Accounts get 10 to 25 percent off list, tinting, and rebates of 2 to 5 percent on annual spend.
Buy in five gallon buckets when you need more than two gallons of a color. They drop the per gallon cost 8 to 15 percent.
Get three quotes on the same grade and sheen. Pro paint prices vary 10 to 30 percent between stores in the same market.
Lock quotes for 30 to 60 days on long bids. Titanium dioxide and acrylic prices move, and a stale quote is a guess on a six week job.
Use PVA primer on new drywall instead of paint with primer built in. Built in primer is a marketing term, not a real primer, and a separate PVA coat saves you a third coat of finish paint.
Match sheen to the surface. Flat hides flaws on ceilings and low traffic walls. Eggshell or satin for living areas. Semi gloss on trim, doors, and baths. Do not overspend on sheen where it does not pay.
Control waste. A tight lid on each can, mixing only what you cut in that day, and tracking touch up cuts bucket count by 8 to 12 percent.

Where Estimators Get It Wrong

The most common mistake is bidding one paint price for the entire job. Walls, ceilings, and trim use different grades and sheens, and the per gallon cost moves 20 to 40 percent between them. Price each line separately or the bid misses the real cost.

Another error is forgetting primer. New drywall, patched walls, and dark color changes need a primer coat, and at $25 to $50 per gallon it adds real money on a 2,000 SF job. If you assume paint with primer built in covers like a real primer, you will either underbuy or apply three coats.

Do not ignore the coverage hit on texture. A heavy knockdown or orange peel wall drops coverage from 400 SF per gallon to 250 SF per gallon, and that 40 percent gap is how estimators run out of paint on day three. Always price texture jobs at the lower coverage.

Finally, do not use single gallon retail pricing for a pro bid. A $50 single gallon at a home center is not your cost on a 30 gallon order through a contractor account. Pro stores discount volume heavily and stock the grades and tint you actually need.

Putting It Together

Interior paint is a commodity with a wide price range that moves with grade, sheen, color, volume, and the TiO2 index. For a defensible bid, price each grade and sheen separately, add primer as its own line, and add a realistic waste factor for texture and cut in. Refresh your quotes for the bid date, get three supplier prices, and run a contractor account for the load pricing and rebates. The per gallon number matters, but the grade mix, coverage assumption, and primer line often move the job cost more than the unit price.