Always know what you owe — as you earn it.
Spaife keeps one running federal tax estimate across all your income — your job, trading, crypto, side gigs, betting. Tax software hands you a number in April; Spaife keeps yours live all year, so you can plan ahead instead of getting surprised.
Estimates to plan with, not tax advice. AI-assisted features are still rolling out, and Spaife is in active development.
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Free during early access · No spam, just product updates · Estimates, not tax advice
~$13,200
roughly 14.5% effective
Gross income
$91,000
Deductions
$15,000
Next due
Sep 15
Income tracked
Example — Spaife builds your real estimate from the records you enter. Estimates, not tax advice.
A paycheck isn't the whole story anymore
Now it's a job plus a brokerage account, some crypto, a side gig, maybe sports betting or a prediction market. That mix breaks tax software built for the simple W-2 world — and the income that's hardest to track is exactly what trips people up. Spaife is built for that reality.
You can be taxed on money you never kept
Here's a trap modern income hides: break even sports betting — win $10,000 across the year and lose $10,000 — and you can still owe tax on the full $10,000 you won. Winnings count as income; the losses only help if you itemize. Take the standard deduction (like most people do) and that $10,000 you didn't keep still lands in your taxable income.
Spaife's Session Netting Optimizer is built to catch exactly this kind of thing — math generic tax tools quietly miss. (An illustrative example; your situation may differ, and these are estimates, not tax advice.)
Watch your tax number move as you earn
Add income, run a what-if, and see the estimate recompute live — the same way Spaife updates as you actually earn. The hands-on demo lives on the How-it-works page.
Try the live demo~$13,200
roughly 14.5% effective · across all your income
Illustrative — try the real interactive version →
Get early access before tax season hits
Spaife is in active development. Join the waitlist for early access and help shape it — honest about what it is today, ambitious about where it's going.
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