THE SHORT ANSWER
Estimate interior painting from the surfaces being painted, the preparation required and the agreed coating system. Keep wall area separate from floor area, and identify trim, ceilings and doors as their own scope decisions.
This Australian walkthrough uses a fictional two-room wall repaint in Brisbane, Queensland. The matching interior painting estimate example shows the same item quantities and amounts in an app-exported PDF. Measure your own site and replace the example rates before issuing a client quote.
1. Measure wall area, not room floor area
Record each wall’s length and height, then document how openings are handled. The floor area of a room is not its paintable wall area. A consistent measurement note helps explain the number the customer sees and prevents switching bases between rooms.
For this example, the agreed starting scope is: Repaint 83.61 m² of interior wall surface in two occupied rooms. Protect floors and furniture, complete minor nail-hole filling, apply two finish coats to walls, and paint 36.58 m of skirting board. Ceilings and doors are excluded. A change to a listed surface, product or access assumption should trigger a revised line or allowance.
2. Define preparation as work
Minor filling, sanding, stain treatment and damaged plasterboard are not interchangeable tasks. This example includes minor nail-hole filling only. Price larger repairs separately and photograph the existing condition for your own estimating record.
3. Describe coats and material responsibility
State the number of finish coats included and whether primer is part of the scope. Confirm the product, sheen and colour changes before ordering. Estimate material quantities using the selected manufacturer’s current coverage information and the actual surfaces.
4. Price trim separately
Skirting board length is a different measurement from wall area. Separate trim also makes it clear whether doors, frames and windows are included. If a customer removes trim from the job, the adjustment can be made without guessing at a share of the wall price.
Worked interior painting calculation
Two checkable lines from the example are 5 hours × A$63.00 = A$315.00; 83.61 m² × A$19.00 = A$1,588.59. The full 6-line estimate totals A$2,932.81 with the demonstration tax input at 0%. The amount is a fictional scenario, not an Australian market rate or a recommended selling price.
Material purchasing and installed quantities may differ. For your own estimate, use the actual takeoff, supplier prices, labour plan, access and disposal requirements. Decide how overhead, profit and the applicable tax treatment affect your final quote; do not copy the example's zero tax setting.
Before you share the estimate
- Confirm wall versus ceiling scope.
- Record product, sheen and number of coats.
- Agree who moves and replaces furniture.
- List major repairs and door painting separately.
Scope boundary in this example: No ceiling coating, door painting, wallpaper removal, major plasterboard repair or hazardous-material remediation.
Confirm the client details and location, item descriptions, measured units, total and validity date. If opening up the work reveals a different condition, document the changed scope and price before proceeding.
Common questions about interior painting
Do I use floor area for an interior painting estimate?
Use the area of the surfaces you will paint. Floor area can describe a room but should not silently replace measured wall or ceiling area in an itemized estimate.
How do I show paint and labour?
Separate a defined materials allowance from preparation and application labour, or describe clearly what a combined line includes. Avoid charging for materials twice.
FROM SCOPE TO PDF
Make your own interior painting estimate.
Describe the actual job in Estimates on iPhone or Android, then review every quantity, rate and scope note. Add your business and client details, check the document and share an itemised PDF. Example amounts are fictional, and some app features may require an in-app purchase.
