Bet checkerPolitics
Did you overpay on “Who will win the next presidential election”?
Say what you paid, where and when. We price the same stake on the other venue’s archived book at that moment — ask, one-way taker fee included — and tell you what your ticket was really worth.
Your bet
You overpaid. A $100 stake on “Who will win the next presidential election?” made $375 on Polymarket vs $349 on Kalshi if it hit — you left $26 on the table.
Polymarket was asking 20.9¢ at that moment — 478 contracts, $3 in fees. Your fill: 22¢, 454 contracts, $5 in fees on Kalshi.
that's after our freshest archived book on Polymarket — read against the last snapshot instead
Read against the Polymarket book at Nov 05 23:01 UTC, after one-way taker fees on entry. A bet held to settlement pays no exit fee. Snapshots are coarse — this is what the book said, not a fill you were guaranteed.
Kalshi 7% of price × (1 − price), rounded up to the cent. Polymarket 4% of price × (1 − price), read from the catalog for politics_fees. Kalshi's rate is its published general schedule; the PDF has been rate-limiting fetches, so it is documented rather than verified.
Both sides of this market
Latest archived asks: Kalshi 22¢ · Polymarket 20.9¢. The full odds history for each side: Kalshi market page · Polymarket market page.