From 2,000 DKK a Month to 2+ Million a Year: Mathias’ Window-Cleaning Story

When Mathias joined Vinduespudseskolen (the Danish Window Cleaner School), his window-cleaning business was bringing in just 2,000 DKK per month. He set a bold target—1 million DKK in annual revenue—and then did something few expect: with the school’s strategy and a lot of hard work, he doubled that target within a year, surpassing 2 million DKK in annual turnover.

The Starting Point: From High School & Coop to a Sabbatical Bet

Mathias came straight out of gymnasium (high school) and a job at Coop, then chose to go all-in during his sabbatical year. He joined Vinduespudseskolen because he didn’t just want a job—he wanted a system: a repeatable way to grow a service company without reinventing everything himself.

At the school he learned a framework built around a subscription model—monthly routes with predictable revenue—plus pricing, sales conversations, and operations that match how modern local services really scale. He also found something else he didn’t expect: a peer group. Rather than seeing other students as competitors, he sparred with them and drew inspiration from their progress. That community lens is a recurring theme for him: when everyone executes a better playbook, the whole market rises.

The First Year: Hitting—and Beating—the Target

Mathias’ interview was filmed in November 2024. The numbers he shared paint a clear picture:

He started at 2,000 DKK/month.
His original goal was 1,000,000 DKK/year, but by year one he had exceeded 2,000,000 DKK/year.
Figures discussed in the interview also include a 1,900,000 DKK average annual run-rate after one year, and monthly revenue points such as 200,000 DKK (Dec 2024) and ~300,000 DKK (March 2025).
An update noted ~310,000 DKK estimated for March (Tidens Polering’s latest at the time).

How did he get there? Two levers stand out:

Subscription routes that compound month after month.
Paid acquisition via High-Rise (Vinduespudseskolen’s advanced program): campaigns that, in his words, paid back ~10x upfront, before counting the ongoing subscription revenue those customers generate.

He also talks openly about mindset: the first million is the hardest. Once the model is working and routes stack, growth accelerates.

Not Just About Money: Building Something Bigger

For Mathias, revenue is a tool—not the destination. The framework from Vinduespudseskolen gave him a cash-flow engine he can reinvest, and he’s clear about where he wants to put it next: real estate. That’s the bigger plan—use a scalable service business to fund long-term assets.

He’s equally clear on ambition. He wants Tidens Polering to become one of Denmark’s largest window-cleaning companies and to make the operation increasingly passive, freeing his time to expand investments.

Team, Training, and the High-Rise Phase

By the end of 2024—as planned in the interview—Mathias had two employees in place. He uses High-Rise, the school’s after-training program, to optimize and scale (ads, systems, and growth pacing).

Update after two years: Tidens Polering has ~7 full-time employees.

Community Over Competition

A thread running through his story is how he doesn’t see fellow students as rivals. He shares that Vinduespudseskolen’s companies are typically ≤ 2 years old, yet they often outpace traditional firms because they follow a strategy that fits a subscription business today. In Mathias’ view, the framework helps students skip years of trial-and-error—and that speed shows up in the numbers.

Why Mathias’ Path Resonates with SEO-Minded Readers

If you’re researching how to start a window cleaning business, window cleaning training, or subscription service models, Mathias’ journey highlights:

A working blueprint instead of guesswork
Subscription revenue for predictability and valuation
Paid acquisition that pays back fast, then compounds via monthly plans
A clear path to reinvest capital into assets like real estate

Final Word (in Mathias’ spirit)

Mathias says his results came from following the school’s strategy closely and working very hard. From 2,000 DKK/month to 2+ million DKK/year, two employees in year one, High-Rise to keep leveling up, and a two-year mark with ~7 full-timers—his story is a case study in disciplined execution.

Postscript: Vinduespudseskolen still works with Tidens Polering daily, has helped them expand to multiple cities, and has both upskilled the first employees and trained the new hires to support the next stage of growth.

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Frequently Asked Questions

Can I build this in any country?

Yes! The program is born global — meaning that if you understand English and like what you’re reading here, then you can build your business anywhere in the world as long that we have windows.

How do I get started building a window cleaning business?

Go to the Learning Hub on the Windowcleanerschool website to learn how everything works. Then, apply to join the next batch. Once accepted, you’ll start learning and building step by step — investing as many hours as you feel comfortable with, we can always adjust as we go. We’re in it for the long term.

Do I need to be physically present in Denmark?

No. Once you become a partner, you’ll be invited to Denmark for in-person training — but that comes later, when your business is up and running and your company can cover travel and accommodation costs. To begin with, everything can be done remotely from your home and then things look different when you have success and are fully flexible as well.