Polymarket runs a referral program that gives new users a $20 sign-up bonus when they register with a valid promo code. The two codes on this page — BOOST20 and SKENS — are both ones PredictionWolf re-tests every Monday to confirm they’re still active. Either one works; pick whichever you prefer. Below: how to redeem them, what the bonus actually lets you do, and the fine print most affiliate pages skip.
01How to redeem the code
The whole process takes about two minutes if you have ID ready. The code must be entered during signup — adding it after you’ve created an account doesn’t work, which is the most common reason people miss the bonus.
- Open Polymarket’s signup page Go to polymarket.com and click “Sign Up” in the top right corner. International users see the global platform; US users in eligible states see the CFTC-regulated US version.
- Enter your email and create a password Use an email you check regularly — Polymarket will send a verification link before letting you trade.
- Enter promo code BOOST20 or SKENS in the referral field This is the step almost everyone misses. The field appears during registration — don’t skip it. Either code grants the same $20 bonus. You can use only one per account.
- Complete identity verification Polymarket requires KYC (government-issued photo ID) before bonuses are credited. US users also need to provide an SSN. This is a CFTC requirement and standard for regulated prediction markets.
- Place a qualifying prediction The $20 typically credits after your first prediction. Use it on any active market — election odds, sports, crypto, or world events. Winnings from positions opened with the bonus are withdrawable after standard account requirements are met.
02What you actually get
The $20 isn’t free cash you can withdraw immediately — it’s prediction credit. You use it to take positions on markets, and if those positions win, the resulting payouts are withdrawable. This is how every prediction market sign-up bonus works, including Kalshi and PredictIt.
Bonus terms in plain English
- Amount: $20 in prediction credit, credited after KYC verification and your first qualifying prediction.
- Withdrawal: The bonus itself isn’t withdrawable. Winnings from positions placed with the bonus are.
- Eligibility: New accounts only. One bonus per person and per household.
- US users: Must be 18+ with a legal US residential address. Not currently available in AZ, IL, MA, MD, MI, MT, NJ, NV, or OH due to state-level legal challenges.
- International users: Available in 160+ countries. Check Polymarket’s terms for the current restricted list.
- Expiration: Bonus credit typically expires if unused within 30 days of issuance.
03How Polymarket compares to other prediction markets
Polymarket is the largest prediction market by volume, but it isn’t the only option. If you’re shopping around, here’s how the sign-up bonuses and basics compare in 2026:
| Platform | Sign-up bonus | Where it works | Settlement |
|---|---|---|---|
| Polymarket | $20 with BOOST20 or SKENS | International + eligible US states | USDC / pUSD (crypto) |
| Kalshi | Varies by promotion | All 50 US states | USD (bank transfer) |
| PredictIt | None | United States | USD |
| Manifold | Play money only | Worldwide | Mana (no cash-out) |
For US users in restricted states, Kalshi is the regulated alternative and worth comparing. For users elsewhere, Polymarket has by far the deepest liquidity and the most market variety.
04Why we re-verify these codes weekly
Affiliate codes break. They get rotated, hit usage caps, or get pulled when a promotion ends. Most “promo code” pages on Google were written once in 2022 and never updated, which is why people end up at signup pages with a dead code and no bonus. PredictionWolf re-tests BOOST20 and SKENS every Monday and updates the “Last verified” date at the top of this page. If you see a date older than a week, send us an email — the codes may have expired and we’ll have replacements posted shortly.