I make $40K/month with this one website

Starter StoryAbout 3 min readJul 21, 2025Watch original
THE SUMMARYAI-generated

Key Concepts

  • Solopreneurship
  • Bootstrapping
  • Minimum Viable Product (MVP)
  • SaaS (Software as a Service)
  • Customer Feedback Driven Development
  • Organic Growth
  • Problem Validation
  • Lean Startup Methodology

Angus Chang's Bank Statement Converter Story

Introduction

Angus Chang, a solopreneur based in Hong Kong, built a SaaS business called Bank Statement Converter that generates $40,000 MRR. He bootstrapped the business himself, with zero employees. The core idea is a simple website that converts bank statements to excel spreadsheets.

Idea Validation and MVP

  • Problem Origin: Angus needed to analyze his bank data in Excel format to track his spending after quitting his job. He found it difficult to extract data from PDF bank statements.
  • MVP Development: He and a friend built an MVP in about a week.
  • Initial Validation: They used Google Ads to drive traffic and quickly saw users uploading bank statements, validating the problem's existence.
  • Framework for Finding Ideas:
    • Solve your own problems.
    • Listen to colleagues' complaints.
    • Implement the smallest possible version of an idea and test it.
    • Prioritize building over extensive pre-launch validation if the MVP is quick to develop.

Building the Product

  • Initial Implementation: Angus initially wrote a console application in Kotlin for his own bank statements.
  • Generalization: He generalized the code to work with other bank statements.
  • UI Development: A friend helped build the UI using Next.js.
  • Deployment: The frontend was deployed on Netlify, and the backend on AWS EC2.
  • Angus Method (Lean Startup):
    • Build an MVP and launch quickly.
    • Focus on target audience feedback, not friends and family.
    • Prioritize features based on user feedback and analytics (e.g., drop-off points, feature usage).

Growth and Marketing

  • Timeline:
    • 2021: Launched Bank Statement Converter
    • 2022: $6,000 MRR
    • 2023: $14,000 MRR
    • 2024: $27,000 MRR
    • Current: $40,000 MRR
  • Metrics:
    • 75,000 total users
    • 1,000 paying customers
    • 40,000 monthly traffic
  • Marketing Experiments:
    • Google Search Ads: Initially used to acquire users but were never profitable (e.g., $1,000 ad spend resulted in $300 sales).
    • Blogging and Building in Public: Generated attention but didn't translate into user acquisition.
    • Cold Emails: Ineffective and generated negative responses.
  • Turning Point: After 6 months, Angus stopped paid advertising and focused on product improvement based on organic user feedback. He noticed 2-3 organic signups per day.

Solopreneurship

  • Transition: Shift from focusing on code quality to focusing on business features.
  • Cons:
    • Social isolation and potential depression.
    • Lack of understanding from others, especially during initial low-revenue periods.
  • Pros:
    • Flexible schedule.
    • Ability to pursue smaller markets that VCs wouldn't be interested in.
    • Less pressure compared to VC-backed startups.

Background and Tech Stack

  • Background: Developer since 2010, with experience in EPS machines, indie game development (Xbox Live), a virtual girlfriend app ("Girlfriend Plus"), investment banking, and a crypto exchange.
  • Tech Stack:
    • Core Engine: Kotlin (JVM language)
    • Frontend: Next.js
    • Transactional Emails: Brevo
    • Backend Hosting: AWS EC2
    • Frontend Hosting: Netlify
    • Payment Processing: Stripe
  • Profitability: High, with approximately $39,000 out of $40,000 MRR being profit.

Lessons Learned

  • Delayed Gratification: Hard work in the initial years (1-2) may not yield immediate financial rewards but pays off in later years (4+).
  • Advice to Past Self:
    • SaaS is an excellent business model.
    • Save enough money to survive multiple years of no income.
    • Ignore social media and focus on the product and real users.
    • Don't waste time creating social media pages for the business prematurely.

Conclusion

Angus Chang's story demonstrates that simple, problem-solving apps can generate significant revenue. His success is attributed to identifying a personal pain point, building a quick MVP, focusing on organic growth, and prioritizing customer feedback. His journey highlights the viability of solopreneurship and the power of a lean startup approach.

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