Bookkeeper for Window Cleaning Companies

How does money flow through a window cleaning business?

You get paid for a job when the invoice is settled, so the money arrives in spikes: card payments land quickly, checks take a week to clear, and the real pattern comes from separating recurring routes from one-time work.

Your steadier cash comes from storefronts on a weekly or monthly schedule, while homes book for a clean once a quarter or twice a year. The one-off jobs, like a new storefront visit or a move-out deep clean, are lumpier. Each type of work needs its own line in the ledger, because the monthly rhythm of the deposit schedule is what lets you plan for off-season pinch.

Cash and checks stay off the card reader, so they never show up in your bank feed on their own. We record every payment, match it to the job it came from, and then reconcile the bank statement to the actual deposits. The goal is that the books tell you what you actually got paid this month, not just what cleared the bank.

What costs matter most and how should I track them?

The biggest costs are the ones that hit regularly, not the big purchases. You replace squeegee blades and pure water filters far more often than you buy a system.

The list you track by itself includes the water-fed pole system, which runs $1,500 to $4,000 when you first upgrade, a used van at $3,000 to $8,000, and the constant and durable stuff: $60 starter kits, $200 pro kits, blades, squeegees, solution. Insurance and licensing run $400 to $1,000 when you bootstrap, $2,500 to $5,000 with workers comp. Marketing can be under $500 or spike to $5,000 if you buy a wrapped vehicle.

The most important cost to track is your own labor and the crew's time. If you are and super fielding the same jobs, the money you take as your pay is a real business cost; if you ignore it, you are fooling yourself about profit. We set up the exact salary for direct labor, separate from your personal draw, and split materials, vehicle, insurance, and software into their own buckets. If you are solo the rough number is 30% of revenue but it varies. Your actual number depends on how you operate.

Track the replacement and filters separately so that when a system fails the repair shows up in the job it was used for, not in some general bucket.

What do window cleaning owners usually get wrong in their books?

The most common mistake is keeping the books as a tax season chore instead of running them in real time. Then the numbers catch me off guard in December.

The trade forums are full of owners asking how to keep track of the money, and the answers start with a old system then add a remote bookkeeper. What we see a lot: a spreadsheet with customer names, job time, revenue, and expenses, and then the owner stops because the spreadsheet doesn't tell them whether they can afford a new worker or whether the summer savings should be moved to January.

Three specific things show that again and again. First, cash and checks that never hit the card reader, so they never get recorded, and the books just show less revenue than actually exist. Second, no money set aside for the slow season: someone said, 'Make sure you put some away for the slow seasons as well as tax season.' Third, the owner's own labor is often treated as free. They pay themselves zero in the books, so the business looks profitable when it is actually just borrowing against next month's revenue.

The fix is to record every payment, set aside the funds for the season automatically, and put a line in the P&L that says 'owner labor' just like a salary. Then the books are honest.

What should I track separately besides the broad profit and loss?

You need three streams: residential recurring, commercial recurring, and one-time work, and then within those the individual job.

Each revenue stream has a different cost and a different time of year. Commercial recurring pays monthly, so it smooths things; residential recurring is seasonal, and one-time jobs are short-term, and oversell revenue but difficult to predict. We set up separate accounts or classes in your books for those three. When the report shows you storefront and house in the same 'income' line, it's not helpful.

Now go down one level. For each job, track the actual expense: the wages, the material, the labor hours, the vehicle drive time. The owner's spreadsheet, the one they said they keep, has customer, time, revenue, and expenses. That is the seed of the right system. We can move that same idea into a proper system and schedule it, using the job costing of your accounting software so each expense is tied to the job that created it.

If you have more than one worker, track the crew separately. A two-person team can split a commercial contract and you should see which person is the more effective on your costs.

What reports do I need and what decisions do they support?

A standard profit and loss is not enough. You need to see job profitability, a service line P&L, and a cash flow forecast that crosses the slow season.

The job profitability report is your per-job view. It tells you which type of job or which specific contract is using hours but not making profit. The whole business does not need to be profitable if a particular client is pulling you down. We print that each month.: you see in green where you actually make money.

The service line P&L is two large buckets: residential, commercial, one-off. That shows the margin difference. Often commercial looks even bigger, but the pricing is per square foot and the travel adds hours, so the margin is thinner than the residential jobs that are fewer but fatter. See that in one report.

The cash flow forecast is the one that keeps you from running short in a slow month. Because the sitting and January can be quiet, a forecast built on your schedule shows you exactly what month you start being short. That is the thing you plan for or sit aside in the summer.

These reports are built off the same clean ledger, so they all match each other. There is no separate copy of the truth.

What decisions should the books help me make?

The books should tell you when to hire someone, when to raise a price, and when to pay for a better water-fed pole instead of another year of ladders.

If the job profitability report shows a recurring commercial contract that eats 45% of the crew's day but brings in only 20% of the revenue, that is your case to renegotiate or walk. If the per-hour profit of the residential work is high, that is the confidence to raise the per-pane price, because you know the number.

The bigger purchases, the pure water system or a second van, should justify themselves with the books. You already know what it saves in time and what it costs. The books confirm the math.

And the decision to hire a second full-time tech. You put the labor cost in, you run the projection, and you see if the added capacity covers the salary. Or you take the same data and decide to stay single-person and pick up a few more routes. That is evidence, not confidence.

Related reading for the same rhythm of clearing trade:

• Commercial Cleaning
• House Cleaning
• Janitorial
• Pressure Washing