Window Cleaning Quoting Mistakes That Cost You Money

Every window cleaner has lost money on a job that looked profitable on paper. The quote felt right, the customer said yes, and then the day turned into a slog: hard water stains you did not account for, a second-story ladder setup you forgot to price, and a customer who paid three weeks late. The problem usually is not the cleaning. It is the quoting. Here are the most common window cleaning quoting mistakes that quietly drain your margins, plus specific fixes you can use on your next estimate.

Mistake 1: Forgetting prep and problem glass

The fastest way to blow a quote is to price clean glass when the glass is not clean to begin with. Hard water spots, overspray, construction debris, stickers, and screens that have not been removed in years all add real time. A standard exterior wipe is one thing. Restoring etched or spotted glass is a completely different job, and it should be priced like one.

Walk the property before you quote, or ask for photos if you are quoting remotely. Look for the stuff that eats labor: screens that need cleaning, tracks and sills full of dirt, hard water buildup, and any glass that needs a scraper or restoration pad.

Mistake 2: Underpricing your overhead

A lot of window cleaners price off a rough hourly number in their head and call whatever is left over 'profit.' But that number usually only covers labor. It ignores the real cost of running the business: insurance, vehicle, fuel, water-fed poles and pure water systems, soap and tools, phone, software, and the hours you spend quoting and driving that nobody pays you for directly.

Figure out your true cost per hour, then price above it. Here is a simple worked example:

• Crew pay: 25 dollars per hour per person
• Overhead loaded on top (insurance, vehicle, fuel, tools, software, admin time): roughly 40 to 60 percent of labor is typical for small field-service crews
• So your real cost on a one-person hour is closer to 35 to 40 dollars, not 25
• If you quote at 50 dollars per hour thinking you make 25, you actually make 10 to 15

Once you know your loaded cost, set a target margin on top of it. If your loaded cost is 40 dollars an hour and you want a healthy margin, you need to bill meaningfully above that, not a few dollars over. Quote based on the job, not the hour, but use the loaded hourly number as your floor so you never go underwater.

Mistake 3: Quoting too slow

Speed sells. When a homeowner reaches out for window cleaning, they often message two or three companies. The first one to send a clear, professional quote usually wins, even if they are not the cheapest. If you wait until the weekend to write up estimates, you are handing jobs to faster competitors.

Aim to get a quote out within a few hours of the request, same day at the latest. You do not need to visit every property first. Many residential jobs can be quoted from a few photos and a quick set of questions about story height, number of panes, and access.

1. Respond to the inquiry fast, even if it is just to say the quote is coming today.
2. Use a standard question set: stories, pane count or window count, interior or exterior, screens, access issues.
3. Send a tidy, branded quote with clear line items so there is nothing to question.
4. Follow up once if you do not hear back within 48 hours.

Mistake 4: No deposit and loose payment terms

Doing the work and then chasing payment is a tax on your time. No-shows, last-minute cancels, and customers who pay 'whenever' all cost you. A deposit solves most of it. When someone has money down, they show up, and you have already collected part of what you are owed before you touch a squeegee.

For residential, a deposit in the range of 25 to 50 percent is common and reasonable. For larger commercial or route work, set clear net terms and stick to them. Make it easy to pay on the spot when you finish, so the job closes the same day it is done.

Mistake 5: Inconsistent pricing across your crew

If you have more than one person quoting, you have a pricing drift problem waiting to happen. One tech quotes 320 for a two-story home, another quotes 250 for a nearly identical house down the street. Customers talk, margins wobble, and you cannot predict revenue. Standardize it.

Create a simple price sheet or quote template with set prices for common jobs and add-ons. Anyone on your team should be able to produce the same quote for the same house. This also makes it far easier to train new hires and to raise prices across the board when costs go up.

• Base price by number of stories and window count
• Add-ons: screens, tracks, hard water, interior, skylights
• Travel or trip minimums for jobs outside your core area
• A clear note on deposits and payment terms on every quote

Mistake 6: Guessing instead of measuring your past jobs

Your best pricing data is sitting in your own history. If you track how long jobs actually take versus what you quoted, you stop guessing. Maybe two-story homes always run 30 minutes longer than you think. Maybe hard water removal eats twice the time you bill. Review a handful of recent jobs each month and adjust your templates.

This is where keeping everything in one place pays off. When your quotes, schedule, and invoices live together, you can see what you quoted, what you charged, and roughly how the day went, then tighten the numbers next time.

Fixing the leaks for good

None of these fixes are complicated. Price the prep you can actually see, build overhead into your floor, quote the same day, take a deposit, and keep your pricing consistent across the crew. Do those five things and the same workload starts producing noticeably more profit, without you working a single extra hour on the ladder.