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Show HN: Free depreciation calculator (no login, no back end, 3KB gzipped)
Author here.
I built MyDepreciation after getting frustrated with TurboTax paywalling basic MACRS calculations ($80 for the "Self-Employed" tier).
*Technical details:*
• Vanilla JS, no frameworks (wanted to keep it lightweight)
• 100% client-side (no backend, no analytics, no data collection)
• MACRS tables hardcoded from IRS Publication 946 (public domain)
• Total bundle size: 3KB gzipped
• Hosted on Cloudflare Pages (free tier)
*Why no framework?*
The entire app is just form inputs + table lookups + arithmetic. Adding React/Vue would 10x the bundle size for zero benefit.
*Privacy-first design:*
Your financial data never leaves your browser. No cookies, no tracking, no "sign up to save calculations." Just pure math.
*Why free?*
The MACRS tables are published by the IRS for free. Paywalling them felt like gatekeeping public information. Plus, hosting costs $0 (static site), so there's no pressure to monetize.
*Open to feedback, especially:*
• Bugs in calculations (I'm not a CPA—if you spot errors, please flag)
• UX improvements (I'm an engineer, not a designer)
• Edge cases I missed (depreciation has a LOT of gotchas)
GitHub: [leave this blank unless you've open-sourced it]
Happy to answer questions!