AI Summary
5 min readFrom a weekend project to $40K/month: The bank statement converter story
Angus Chang built a website that does exactly one thing: it converts PDF bank statements into Excel spreadsheets. That single-function site now generates $40,000 per month in revenue, and Chang runs it entirely alone—no employees, no co-founder, no outside funding. The business, Bank Statement Converter, launched in 2021 and has grown steadily: $6,000 MRR in 2022, $14,000 in 2023, $27,000 in 2024, and $40,000 today. It has 75,000 total users, about 1,000 paying customers, and 40,000 monthly visitors. Nearly all of that revenue—roughly $39,000 of the $40,000—is profit.
How a personal annoyance became a product
Chang didn't set out to build a business around bank statements. After quitting his job, he wanted to understand his personal finances—specifically, how long his savings would last. To do that, he needed multiple years of transaction data in a spreadsheet. His bank only offered PDF statements, so he wrote a script to extract the data. The process was harder than expected, and he realized others probably faced the same problem.
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What you'll learn
- 1 (02:15) **Founder & Business Intro** - Angus Chang introduces himself and his business, Bank Statement Converter, a simple website that makes $40K/month as a solo, bootstrapped operation.
- 2 (02:30) **Origin Story: Solving a Personal Pain Point** - Angus explains how he discovered the idea after quitting his job and needing to analyze his own bank data.
- 3 (03:04) **Validation Through a Quick MVP** - Angus describes his lean approach to validating the idea by building and launching a minimal product in one week.
- 4 (03:33) **Framework for Finding Simple Ideas** - Angus shares his strategy for identifying problems worth solving.
- 5 (04:03) **Building the MVP: Tech Stack & Process** - Angus details how he went from a local console app to a live website.
- 6 (04:36) **The "Angus Method": Lean Startup Approach** - His framework for building products: launch fast, ignore friends/family feedback, and iterate based on real user data.
- 7 (05:08) **Growth Timeline & Key Metrics** - Angus shares the revenue progression and current business numbers.
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Guests on this episode
Show Notes
I make $40K/month with this one websiteSharing ideas that make money! ---- Keywords: app store success, online business, passive income, app flipping, bootstrap startup, startup success, digital products
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