CalculatorsFree, no sign-up
Prediction market tax calculators: what each one estimates, and what you enter
As of October 25, 2026, Realize publishes three free prediction market tax calculators and three smaller tools inside its venue guides. The filing calculator prices a year three common ways; the venue calculators turn an all-time net into a federal range. Each runs on a figure you type in, with no sign-up.
By Owen Monagan, Founder & CEOUpdated Updated October 25, 2026
Calculators at a glance
Updated October 25, 2026- Calculators
- 3
- Tools inside guides
- 3
- Tax covered
- Federal only
- Cost
- Free, no sign-up
Calculators3 calculators
Which prediction market tax calculators are there?
Free, with no sign-up. Each one runs on a figure you type in, before you connect anything.
| Calculator | What it estimates | What you enter |
|---|---|---|
| Prediction market tax calculator | A year priced the three common ways people file: standard capital, Section 1256 and gambling treatment, side by side. | Whether you made or lost money; How much you made or lost; How much you traded: winning turnover plus losing turnover, not the net; Whether you itemize or take the standard deduction |
| Kalshi tax calculator | On a winning Kalshi year, the difference between Section 1256’s 60/40 split and a short-term capital gain; on a losing one, the loss valued as a capital-loss deduction. | Whether you are up or down; Your all-time Kalshi net |
| Polymarket US tax calculator | A winning or losing Polymarket US year, Section 1256 included, for the CFTC-regulated US exchange rather than polymarket.com. | Whether you are up or down; Your all-time Polymarket US net |
A typed figure cannot split a history by tax year or mark a position open at December 31. Connecting an account replaces it with every fill, matched first in, first out.
Prediction market tax calculator
What does the prediction market tax calculator take?
A year priced the three common ways people file: standard capital, Section 1256 and gambling treatment, side by side.
- Whether you made or lost money
- How much you made or lost
- How much you traded: winning turnover plus losing turnover, not the net
- Whether you itemize or take the standard deduction
What it returns: federal tax under each route, priced at the top federal rates of 37% ordinary and 20% long-term, with what a loss is worth this year beside the total.
Kalshi tax calculator
What does the Kalshi tax calculator take?
On a winning Kalshi year, the difference between Section 1256’s 60/40 split and a short-term capital gain; on a losing one, the loss valued as a capital-loss deduction.
- Whether you are up or down
- Your all-time Kalshi net
What it returns: a rough federal range across the 10% to 37% brackets.
What the estimate assumes, each set out on its page:
- What the estimate compares
- A losing year is valued over several returns
- Your figure is your all-time Kalshi net
- A past Kalshi year can still be marked at year end
- Kalshi’s fees sit inside your net
Polymarket US tax calculator
What does the Polymarket US tax calculator take?
A winning or losing Polymarket US year, Section 1256 included, for the CFTC-regulated US exchange rather than polymarket.com.
- Whether you are up or down
- Your all-time Polymarket US net
What it returns: a rough federal range across the 10% to 37% brackets.
What the estimate assumes, each set out on its page:
- Your figure is your Polymarket US net since late 2025
- December 31, 2025 has a price
Inside the guides3 tools
Which venue guides carry a calculator of their own?
Smaller tools that answer one venue question each.
| Tool | What you enter |
|---|---|
| Which Kalshi forms will I get? | The tax year, whether interest passed the reporting line, credits and rewards received, and whether you moved crypto in or out. |
| Kalshi fee calculator | Taker or maker, the kind of market, a price and a number of contracts, rounded the way Kalshi’s table rounds. |
| Kalshi and Polymarket US fees on the same order | A price and a number of contracts, with each exchange’s fee rounded its own way. |
See your year priced three ways.
Connect your prediction market accounts for a free estimate under each common treatment, built from every fill.