Hey PH 👋 I'm Rush — architect by day (affordable multifamily housing in Boston), solo builder of Spaife on nights and weekends. The itch: my income stopped being one number years ago. Paychecks, stock and crypto trades, side-gig income, the occasional bet. Every tax tool wanted me to sit down once a year, type it all in, and get a snapshot that was stale by my next paycheck. April was a surprise party where the surprise is a number. Spaife is what I wanted instead: one running federal estimate that updates as you earn. It's event-sourced under the hood — every paycheck, trade, or payout is an event, and your estimate is recomputed from the full history. The number on screen always traces back to the exact events behind it. No black box. Honest fine print: it's early access and invite-gated while I harden it. US federal for now. And it's estimates, not tax advice — Spaife tells you where you stand; your CPA tells you what to do. I'm self-taught and built this solo, so sharp feedback is the whole point of launching here. Drop your email at spaife.com and I'll personally send you an invite code — and tell me: what income source do you most wish showed up in a live number?

Spaife

One running tax estimate across everything you earn

One running tax estimate across everything you earn