Fees and costs
63c on Kalshi: odds and probability in 2026
A 63c Kalshi YES is a 63% sticker probability, about -170 American odds and 1.59 decimal odds before fees. With Kalshi’s 0.07 x P x (1 - P) taker fee, the hold-to-resolution breakeven is about 64.63%. Polymarket also charges taker fees by category, so the after-fee probability depends on the venue and market.
What this page found
- A 63c prediction-market price is a 63% sticker probability before fees, not an after-fee breakeven number.
- A 63c Kalshi YES converts to about -170 American odds and 1.59 decimal odds.
- Kalshi’s taker fee is 0.07 x P x (1 - P) per contract per side, peaking at 1.75c at a 50c price.
- After the Kalshi taker fee, a 63c YES held to resolution needs about 64.63% to break even.
- A sportsbook -110 line needs 52.38% to break even and a -110/-110 market carries a 4.76% overround.
What does a 63c Kalshi price mean?
A prediction-market price in cents is the market’s before-fee implied probability. A 63c YES means the contract costs $0.63 and pays $1 if YES wins. The sticker probability is therefore 63%. That is the clean conversion, and it is the number most people mean when they say a market is pricing an event at 63%.
The bettor version adds the fee. Kalshi charges takers 0.07 x P x (1 - P) per contract per side, where P is the price in dollars. At 63c, the fee is 0.07 x 0.63 x 0.37 = $0.016317, or 1.6317c. A YES bought at 63c and held to resolution therefore costs about 64.6317c all in, so the after-fee breakeven probability is about 64.63%. That is the number to compare with an outside forecast, model, or line from another book. The same habit applies when checking market pages or a fee explainer in the guides library.
| Item | Value |
|---|---|
| Sticker price | 63c |
| Sticker implied probability | 63% |
| American odds | -170 |
| Decimal odds | 1.59 |
| Kalshi taker fee | 1.6317c |
| After-fee breakeven | 64.63% |
How do I convert cents into American and decimal odds?
The cents-to-probability step is direct. Divide the cent price by 100. A 25c contract is 25%, a 50c contract is 50%, and a 75c contract is 75%. Decimal odds are 1 divided by that probability. American odds switch sign at 50c: below 50c they show the profit on a $100 winning bet, and above 50c they show the stake needed to win $100.
- If P is below 50%, American odds = ((1 - P) / P) x 100.
- If P is above 50%, American odds = -(P / (1 - P)) x 100.
- Decimal odds = 1 / P.
- Sticker implied probability = P.
A 63c YES has P = 0.63. Decimal odds are 1 / 0.63 = 1.5873, which rounds to 1.59. American odds are -(0.63 / 0.37) x 100 = -170.27, which rounds to -170. These are before-fee conversions. The after-fee version belongs in the bet slip math, not in the headline market probability. That distinction matters when comparing Kalshi and Polymarket fees or checking whether a visible gap on the live board survives costs.
| Price | Implied probability | American odds | Decimal odds |
|---|---|---|---|
| 25c | 25% | +300 | 4.00 |
| 50c | 50% | +100 | 2.00 |
| 75c | 75% | -300 | 1.33 |
What is the full 5c to 95c table after Kalshi fees?
This table uses one Kalshi taker fee on entry and assumes the contract is held to resolution. It does not add a second exit fee. Kalshi’s fee curve is 0.07 x P x (1 - P), so the fee is largest near 50c and smaller near 5c or 95c. The after-fee breakeven column is price plus that one entry fee, expressed as a probability. It is the minimum true win probability needed to break even before considering taxes, slippage, or opportunity cost.
| Price | Sticker probability | American odds | Decimal odds | Kalshi after-fee breakeven |
|---|---|---|---|---|
| 5c | 5% | +1900 | 20.00 | 5.33% |
| 10c | 10% | +900 | 10.00 | 10.63% |
| 15c | 15% | +567 | 6.67 | 15.89% |
| 20c | 20% | +400 | 5.00 | 21.12% |
| 25c | 25% | +300 | 4.00 | 26.31% |
| 30c | 30% | +233 | 3.33 | 31.47% |
| 35c | 35% | +186 | 2.86 | 36.59% |
| 40c | 40% | +150 | 2.50 | 41.68% |
| 45c | 45% | +122 | 2.22 | 46.73% |
| 50c | 50% | +100 | 2.00 | 51.75% |
| 55c | 55% | -122 | 1.82 | 56.73% |
| 60c | 60% | -150 | 1.67 | 61.68% |
| 65c | 65% | -186 | 1.54 | 66.59% |
| 70c | 70% | -233 | 1.43 | 71.47% |
| 75c | 75% | -300 | 1.33 | 76.31% |
| 80c | 80% | -400 | 1.25 | 81.12% |
| 85c | 85% | -567 | 1.18 | 85.89% |
| 90c | 90% | -900 | 1.11 | 90.63% |
| 95c | 95% | -1900 | 1.05 | 95.33% |
Why is the after-fee probability higher than the price?
A YES contract pays $1 only if YES wins. If the sticker price is 50c and the entry fee is 1.75c, the all-in cost is 51.75c. A trader holding that contract to resolution must win more than 51.75% of identical bets to break even. The sticker price still says 50%, but the bet ticket says something stricter.
The shape matters. The Kalshi taker fee is not a flat 1.75c everywhere. It is 0.07 x P x (1 - P), so it peaks at 50c and falls toward zero at either end. At 5c, the arithmetic fee is 0.3325c. At 95c, it is also 0.3325c. At 63c, it is 1.6317c. The same formula can make the fee feel small in tail prices and meaningful near coin-flip prices.
How does this compare with sportsbook vig and Polymarket?
Sportsbook odds bury the vig in the line. The standard -110/-110 example implies 52.38% on each side, because 110 / (110 + 100) = 52.38%. Both sides together add to 104.76%, so the overround is 4.76%. A bettor laying -110 must win 52.38% to break even. At -105 the breakeven is 51.22%; at -120 it is 54.55%.
Prediction markets show the price first, then fees have to be added. A 50c contract looks like 50%, but a Kalshi taker paying the peak 1.75c entry fee needs 51.75% if holding to resolution. Polymarket also charges taker fees, but its published rate is set by market category rather than one flat rate. That means the clean comparison is not just 63c versus 63c. It is price, spread, fee, liquidity, and whether the order is maker or taker.
Most days there is nothing here beyond arithmetic. The edge is usually not that a 63c contract secretly means something else. It is that the bettor remembers the fee before calling 63% fair. For broader venue checks, use the live board, state availability pages, and the fee comparison pages before treating a visible price as a bettable number.
Questions people ask
Is a 63c prediction-market price the same as 63%?
Before fees, yes. A 63c YES contract has a 63% sticker implied probability because the contract costs $0.63 and pays $1 if YES wins. After fees, the breakeven is higher. On Kalshi, 0.07 x 0.63 x 0.37 = 1.6317c, so the hold-to-resolution breakeven is about 64.63%.
What American odds are equivalent to 63c?
A 63c YES is about -170 in American odds. The arithmetic is -(0.63 / 0.37) x 100 = -170.27, rounded to -170. The decimal odds are 1 / 0.63 = 1.5873, rounded to 1.59. Those conversions are before fees.
Why does a 50c Kalshi contract need 51.75% to break even?
Kalshi’s taker fee is 0.07 x P x (1 - P) per contract per side. At P = 0.50, the fee is 0.07 x 0.50 x 0.50 = $0.0175, or 1.75c. A 50c YES held to resolution therefore costs 51.75c after the entry fee.
Is the fee-adjusted probability the same on Polymarket?
Not necessarily. Kalshi uses the flat 0.07 x P x (1 - P) taker-fee formula. Polymarket’s published taker fee rate depends on the market category. The same 63c sticker price can therefore have a different after-fee breakeven on Polymarket than on Kalshi.
How does -110 compare with a 50c prediction-market price?
A 50c price is 50% before fees. A -110 sportsbook line requires 52.38% to break even, and a -110/-110 market has a 4.76% overround. A 50c Kalshi taker entry held to resolution needs 51.75% after the peak 1.75c fee.
Sources
Independent archive. No referral links in editorial copy, no paid placements, and nothing here is legal, tax or financial advice. Found an error? Tell us and we will date the correction.
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