Free tool
Bonus & Promo Value Calculator
A prediction-market bonus is rarely worth its face value. Enter the offer’s terms to see what it is really worth after you have met the wagering requirement — and whether it is worth taking at all.
What the bonus is really worth
A guide, not a guarantee. Real terms vary: some offers base wagering on deposit + bonus, restrict qualifying markets, or expire. “Cost per turnover” is the fee and spread you lose each time you cycle the money — on most prediction markets that is roughly 1–3%. Always read the offer’s actual terms. This tool stores nothing.
Why a bonus is worth less than it looks
Almost every promotion comes with a wagering (or playthrough) requirement: before you can withdraw the credit, you must trade through it a set number of times. Each time you cycle the money you lose a little to fees and the spread, so a headline “$50 bonus” with a 5× requirement means wagering $250, and the cost of doing that eats into the reward. This calculator estimates that cost and shows the bonus’s true net value, plus its effective value as a percentage of the deposit you had to make.
How to read the result
A positive net value means the offer is worth taking once you have chosen the platform for other reasons. A value close to zero — or negative — means the wagering requirement swallows the bonus, and it is not worth distorting your trading to chase. Prediction-market promos are generally small, so treat any of them as a minor extra rather than a reason to pick a platform. Choose the venue first using our best-platform rankings and each platform’s promo page — for example Kalshi promos — then run the numbers here. To size an individual trade, use the profit calculator.
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Frequently asked questions
How do I work out the real value of a bonus?
Take the bonus amount and subtract the cost of meeting its wagering requirement. If a $50 bonus must be wagered 5×, you trade $250 through the platform, and at (say) 2% cost per turnover that is about $5 — so the bonus is worth roughly $45. This calculator does that maths for you.
What is a wagering (playthrough) requirement?
It is the number of times you must trade through a bonus before you can withdraw it. A 5× requirement on a $50 bonus means $250 of wagering. Some offers base the requirement on the deposit plus bonus, which is stricter, so always read the terms.
Are prediction market bonuses worth taking?
Usually only as a small extra. They are far smaller than sportsbook offers, and wagering requirements erode their value, so never choose a platform for its bonus — pick on fees, liquidity and markets, then take any promo on top.
Now find the right platform
You've run the numbers — see which regulated exchange fits the markets you want to trade.
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