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Know exactly what you owe from prediction markets.

FileMyFills pulls your trade history, computes your realized gains and losses, and gives you a formatted report ready for tax filing — in minutes.

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No account required. Your API key is never stored.

How it works

1

Connect

Paste your read-only API key from your account settings. We walk you through it step by step.

2

Calculate

We pull your full trade history and compute realized gains and losses using FIFO cost-basis accounting.

3

Download

Get a formatted CSV report — ready to hand to your CPA or import into tax software.

Simple pricing

$9.99
one-time per tax year
  • ✓Full trade-by-trade FIFO gain/loss breakdown
  • ✓CSV formatted for easy import or CPA review
  • ✓Covers the complete tax year (all pages of history)
  • ✓Reconciliation check flags anomalies before you file
  • ✓Instant download after payment
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Informational only. Not tax advice. See disclaimer.