How do I measure wall area for a quote?

Multiply room perimeter by ceiling height, then subtract 1.8 m² per standard door and 1.5 m² per standard window. Round up for practical purposes.

Should paint be a separate line or included?

Separate. Clients expect to see the paint brand and quantity, and it protects your margin when they upgrade from trade paint to a premium brand.

How many coats is standard?

Two coats over primed or previously painted surfaces. Bare plaster or heavy colour changes may need three. State the number of coats on the invoice.

What warranty should I offer?

A 12-month touch-up warranty on workmanship is standard in Europe. It excludes damage from moisture, impact, or client alterations.

Do I need a deposit for painting?

For jobs over 3 days or €2,000, yes — typically 20–30% to cover material purchase. Smaller jobs can be invoiced on completion.

Painter Invoice Guide: Per-Room vs Per-Square-Meter Pricing

Room-based quotes are the #1 source of painter invoice disputes. Here's how to quote, invoice, and document painting work so clients pay without arguing.