Window cleaning is one of the simplest businesses to start and one of the most dependable to run. Customers on a round pay every four to eight weeks, year after year, and a well-run round can be sold as a business asset. Add gutters, fascias, conservatory roofs and solar panels and the earning potential grows.
The difference between a busy window cleaner and a profitable window cleaning business is organisation: pricing that covers your time, a round that is planned for efficiency, customers who actually pay, equipment that is maintained, and safety at height. This guide explains how to start a window cleaning business in the UK step by step.
1. Traditional or water-fed pole?
Most UK window cleaners now use a water-fed pole system: purified water pumped up a long pole to a brush, cleaning windows from the ground. It is faster on many houses, safer than ladders and suits upstairs windows. You need a van or trailer with a water tank, a pump, a purification system (usually reverse osmosis and deionising resin) and poles and brushes.
Traditional cleaning with a squeegee and ladder still has a place for ground-floor work, shopfronts and detailed jobs. Many cleaners use both.
2. Choose your services
- Residential rounds: the backbone of most businesses. Regular, predictable income.
- Commercial windows: offices, shops and schools, often on contract.
- Gutter clearing: high value per job, usually with a gutter vacuum system.
- Conservatory roof cleaning.
- Fascia and soffit cleaning.
- Solar panel cleaning: a growing niche.
- One-off deep cleans for new customers, house sales and end of tenancy.
Add services to your round to raise the value of each customer without adding new driving time.
3. Setting up the business
Most window cleaners start as sole traders registered with HMRC for Self Assessment. Open a business bank account so payments, fuel and equipment costs are kept separate from personal spending.
4. Insurance and credentials
Most window cleaners carry:
- Public liability insurance: essential. A pole through a window or water damage can be costly.
- Employers' liability insurance: a legal requirement once you employ anyone.
- Tools and equipment insurance: water-fed systems are valuable.
- Van insurance for business use.
Credentials help win business: membership of a trade body, working at height training, and background checks for staff who work around homes. Log each one in a compliance register with renewal dates.
5. Window cleaning prices
Window cleaning prices in the UK vary by region, property size and frequency. Price by the job, not by the hour, but always know your effective hourly rate:
- Set prices by property type (terrace, semi, detached, flats) and number of windows.
- Charge more for first cleans, heavily soiled frames and difficult access.
- Price add-ons like gutters, conservatory roofs and solar panels separately.
- Offer frequency options (four-weekly, eight-weekly).
Then track your revenue per hour across the round. If one street earns £40 an hour and another earns £20 because of travel or difficult access, adjust prices or reshape the round.
A pricing calculator that works back from your target margin helps you set prices that cover your time, fuel, supplies and overheads.
6. Building your round
You can build a round by:
- Canvassing: leaflets and door knocking in tight areas. Density matters more than numbers.
- Online: a simple website, local search listings and social media.
- Referrals: happy customers recommend you to neighbours.
- Buying a round: established window cleaning rounds for sale come with ready-made customers and income. Check payment history and how many customers are really active before you buy.
Keep the round tight. Twenty houses on three neighbouring streets beat twenty houses spread across a town.
7. Plan the round and track every job
For each job record:
- Customer and address
- Service
- Hours
- Rate per hour (your price divided by the time taken)
- Labour cost per hour
- Supplies and fuel
- Revenue, total cost and gross profit
- Job date and next clean due
The next clean due date is the heart of the business. Get a reminder before each customer is due, update the round schedule weekly and let customers know when you are coming.
From this you see your average job value, hours worked, revenue per hour and supplies and fuel as a percentage of revenue: the numbers that tell you whether the round is really profitable.
8. Getting paid
Unpaid windows are the classic window cleaner problem. Customers are out when you call, forget to pay and drift into arrears. Fix it with:
- Card payments, bank transfer or direct debit as standard
- Invoices or payment requests sent the same day
- A clear policy on missed payments
Track every invoice as Paid, Open or Overdue. An aged debtors report shows who owes what and for how long, so you can chase or drop customers who never pay.
9. Equipment and supplies
Water-fed systems need maintenance. Track consumables: deionising resin, sediment and carbon filters, brush heads, squeegee rubbers, scrim and cloths, cleaning solution and gloves. For each, record unit cost, opening stock, deliveries, closing count and reorder level.
Daily checks keep you working: van walk-around, pole and hoses checked, and pure water reading (TDS) checked so you know when resin needs changing. Weekly: resin and filters checked, ladders inspected and tagged. Get the van's water tank and pump serviced annually.
10. Safety at height
Window cleaning involves real risks. Your window cleaning risk assessment should cover:
- Working at height: use water-fed poles from the ground where possible; when using ladders, the right ladder, three points of contact and no overreaching.
- Overhead power lines: survey every site, keep poles away from lines and consider non-conductive poles.
- Slips: wet ground, moss and ice.
- Manual handling: poles, hoses and ladders.
- Lone working: check-in calls and a mobile phone.
- Vehicles and the public: hoses across pavements and reversing on driveways.
The Work at Height Regulations apply to window cleaning, so a written risk assessment and trained staff are important.
11. VAT
Most solo window cleaners stay under the VAT threshold. If you grow with staff and commercial contracts, you may pass it. Plan with an accountant, and once registered keep a quarterly VAT summary.
12. Cash flow and seasonality
Window cleaning is steady but winter brings short days, rain and frost. A 12-week cash flow forecast shows money in and money out for wages, fuel, van costs, supplies and tax, with warnings for weeks where the balance goes negative. Build reserves in summer.
13. Window cleaning software: app or spreadsheet?
Window cleaning apps can handle rounds and payments for a monthly fee. A small round needs a customer list with prices and due dates, a job log, payments and debtors, stock, safety checks, VAT and cash flow in one place, plus a dashboard. A good spreadsheet does all of that with no monthly fee.
Common mistakes new window cleaners make
Spreading the round too thin. Driving between scattered customers kills your hourly rate. Concentrate on tight areas.
Pricing too low to win work. Cheap prices fill a round quickly but leave no room for fuel, equipment and your time. Raise prices on new customers first.
Letting arrears build up. A few missed payments across a large round add up fast. Chase quickly and make digital payment the default.
Ignoring water quality. Spotty windows mean complaints. Check the pure water reading daily and change resin on time.
The numbers to check every month
Review average job value, hours worked, revenue per hour, supplies and fuel as a percentage of revenue, overdue payments and your lowest cash balance over the next 12 weeks. These show which streets and services really pay.
How to market your window cleaning business
Marketing a window cleaning business is about being found, being trusted and being rebooked. Leaflets in tight areas still work, especially when you are already cleaning on that street, because neighbours see the van and the results. Ask customers for reviews and referrals, and offer a small reward for each new customer they bring. Local search listings and a simple website with your areas and services help new customers find you. Track each new customer's source so you can focus on the cheapest way to grow your round.
The most effective marketing for most small window cleaning businesses is free: excellent work, prompt replies, honest prices and asking every happy customer for a review. Paid advertising works best once your pricing, capacity and customer records are in place, because you will know exactly what a new customer is worth to you over a year.
The Window Cleaning Business Management System
The Window Cleaning Business Management System is a window cleaning business spreadsheet in Excel built for your round:
- Round and job tracker with service, hours, rate per hour, labour cost, supplies and fuel, revenue, gross profit and a next clean due reminder
- Sales and VAT, invoices and aged debtors with a "chase these first" list
- 12-week cash flow forecast with shortfall warnings
- Quarterly VAT summary, profit and loss, budget vs actual and a pricing calculator
- Daily and weekly checks: van, water-fed pole and hoses, pure water reading, resin and filters, ladders, round schedule and PPE
- Compliance register pre-filled with working at height training, water tank and pump service, trade body membership, public and employers' liability, van and tools insurance, staff background checks and data protection
- Risk assessments pre-filled for working at height, overhead power lines, slips, manual handling, lone working, vehicles and the public
- Stock take pre-loaded with deionising resin, filters, brush heads, squeegee rubbers, scrim, cleaning solution, gloves and cloths
- Staff rota with wage cost
- Dashboard with income, profit, margin, average job value, hours worked, revenue per hour, supplies and fuel % of revenue and a compliance score
It costs £15 once, with no subscription. Works in Excel 2016 or later, Microsoft 365, Excel for Mac and Excel online, in 5 languages and 25 currencies.
**Get the window cleaning business spreadsheet →**
Your window cleaning start-up checklist
1. Choose traditional, water-fed or both. 2. Register as a sole trader and open a business account. 3. Buy or build your water-fed system and van setup. 4. Arrange public liability, tools and van insurance. 5. Get working at height training. 6. Set prices by property type, with add-on services. 7. Build a tight round through canvassing, online listings and referrals. 8. Log every customer with price and next clean due. 9. Take card, bank transfer or direct debit payments and chase arrears. 10. Track resin, filters and supplies with reorder levels. 11. Write risk assessments for height and power lines and keep daily checks. 12. Run a 12-week cash flow forecast for winter.
Frequently asked questions
How much does it cost to start a window cleaning business? Traditional window cleaning has very low start-up costs. A water-fed pole system with a van tank and purification costs more but speeds up work. Insurance and marketing are the other main costs.
How much do window cleaners earn? It depends on your prices, how tight your round is and how many hours you work. Track revenue per hour across your round to see your real earnings.
Do window cleaners need insurance? Public liability insurance is strongly recommended, and employers' liability is a legal requirement once you employ anyone.
Is a water-fed pole better than ladders? For many residential jobs, water-fed poles are faster and safer because you work from the ground. Ladders are still useful for some jobs and detail work.
How do I stop customers not paying? Use card, bank transfer or direct debit, send payment requests the same day and track arrears with an aged debtors report.
A window cleaning business is built on a tight round, fair prices and customers who pay on time. Get those right and you have steady income and a business you can sell. The window cleaning business spreadsheet puts it all in one Excel file for £15.