great thread and very interesting comments.
i don't have a simple formula, but wish i did.
over 20 years experience, it's now some thing i regard as "needs sorting"
...i have made a rod for my own back as i have to do my own pricing, all the time !!
i want to employ a canvasser, but don't know how to teach my pricing method below..
i price on windows (quantity, size, accessibility,)
parking and accessibility around the house,
how long the job will likely take,
frequency
and the type of people (customers) they are likely too be.
initial clean premium can be +10% too "double" the regular clean price.
i get most quotes and have very, very high customer retention
i believe if you get every single job you price - you're pricing too cheap.
i hate getting it wrong but hate being under priced more than any thing, so don't mind losing a few.
interesting and encouraging to see how some guys on here price near blind and so simply and are doing well...