I Built a Crypto Tax SaaS Prototype — Now Deciding What to Do With It
Over the last few months, I worked on a small side project: a crypto tax reporting SaaS for traders.
The original idea came from seeing how messy it can be to calculate gains and losses when trades are spread across multiple exchanges.
So I built a simple prototype that can:
• Import trade history from 9 exchanges
• Process CSV transaction data
• Automatically classify short and long-term gains
• Generate accountant-ready reports
• Provide a minimal dashboard to review transactions
The focus was mostly on building a clean data pipeline and a simple interface for reviewing transactions.
What I Learned Building It
A few interesting challenges came up during development:
Exchange data formats are inconsistent**
Every platform exports different CSV structures, which required normalization before processing.Transaction classification logic matters**
Handling gains/losses correctly requires careful handling of timestamps and asset conversions.Simplicity is underrated**
A basic dashboard with clear summaries turned out to be more useful than complex analytics.
The Current Situation
The prototype works and processes trade history correctly.
But like many side projects, I'm at the classic crossroads:
- Continue developing it into a full SaaS product
- Open source parts of it
- Or pass the project to another builder interested in the space
Curious About Other Builders’ Experiences
For developers who have built fintech or crypto tools:
Would you keep building a niche SaaS like this, or move on to the next project?
I'm always interested in hearing how other builders decide which projects to double down on.
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