New to prediction markets? Read what prediction markets actually are first — five minutes to understand pricing and resolution before you open multiple accounts. Already trading one platform? Skip to the worked example below. Just want the verdict? Polymarket → Coinbase → Kalshi → Robinhood, in that order. The structural play is to access the full breadth of US prediction markets in one sitting.
You can stack four to five regulated welcome offers across Polymarket, Kalshi, Robinhood Event Contracts, and a USDC on-ramp (Coinbase or Kraken) — each offer a separate, regulated welcome on a separate platform. Stacking is not a loophole; it is exactly how the category works in May 2026. The recommended order, the mechanics, and the catches are below.
Bellwether is applying for partner status with each of these platforms. When approved, our exclusive bonus stack calculator will be live here. Until then, the dollar value of stacking these bonuses depends on each platform’s current welcome offer (which rotates). The structural play (open accounts on all three US prediction markets to access the full breadth of the category) is what matters here.
We may earn a commission when you sign up through the links on this page. Learn more.
TL;DR — the stack at a glance
The short version: yes, you can legitimately stack four to five sign-up welcome offers across the major US prediction markets and their crypto on-ramps. Each one is a real welcome offer on a separate, regulated platform. Stacking them is not a loophole — it is exactly how the category works in 2026. The platforms are competing for the same informed-trader audience, and the welcome incentives are how they bid for your first deposit.
The actual dollar value of stacking these bonuses depends on each platform’s current welcome offer (which rotates). Bellwether’s stack calculator will be live once we have verified partnership terms with each platform — the structural play (open accounts on all three to access the full breadth of US prediction markets) is what matters here.
The order matters. Start with Polymarket, where the welcome offer pairs cleanly with a small first deposit. Move to the on-ramp account next so your USDC funding is ready before you need it. Then layer in Kalshi for the fastest second account, and finally Robinhood if you already have or want a Robinhood account. Every welcome offer below was verified as live on May 26, 2026. Trading event contracts involves risk of loss — you can lose your entire stake on top of any bonus.
The recommended sign-up order
You can sign up in any order you like, but this sequence captures the most welcome value with the least friction. Each step is sized so that the bonus is meaningfully bigger than the deposit, and so that the assets you build up in earlier steps are useful in later ones.
Step 1 — Polymarket (anchor of the stack)
Polymarket runs media-partner welcome codes through its referral program. Specific code terms change over time; signing up via Bellwether’s link routes to Polymarket’s current public offer. Sign up here first so you do not accidentally deposit without a code attached.
Step 2 — Coinbase or Kraken (your USDC on-ramp)
Polymarket settles in USDC on the Polygon network. If you fund with Apple Pay or ACH the conversion is invisible, but if you ever want to deposit larger amounts, withdraw outside of US banking hours, or hold dry powder for breaking-news markets, you will want a USDC source. Coinbase is the simpler choice for first-time crypto users. Kraken tends to have cheaper trading on size — better if you expect to be moving USDC regularly. Welcome offers on both platforms rotate; confirm at sign-up.
Step 3 — Kalshi (fastest second account)
Kalshi’s user-to-user referral program credits trading credit once you fund with a small ACH deposit and complete the qualifying trade. ACH on Kalshi settles same-day, so this is the quickest path to a second active prediction-market account. You also get a CFTC-regulated, USD-native venue to compare directly against Polymarket — useful for arbitrage spotting and category education.
Step 4 — Robinhood Event Contracts (if you already use Robinhood)
If you already trade on Robinhood, or you have been meaning to open an account, the Event Contracts promo is worth paying attention to. Robinhood’s published reward stock posts to your account on KYC clearance (current value varies). Periodic commission-rebate windows on Event Contracts run during specific event weeks. Verify the active offer in-app before depositing.
Optional — MoonPay (impatient-user top-up)
MoonPay is not a long-term account — it is a one-off card-to-USDC bridge for when you need crypto fast and your Coinbase or Kraken wires have not landed yet. Useful as the fifth step only if you genuinely need an instant on-ramp; skip it otherwise.
The bonus stack — current status
The actual dollar value of stacking these bonuses depends on each platform’s current welcome offer (which rotates). Bellwether’s stack calculator will be live once we have verified partnership terms with each platform — the structural play (open accounts on all three to access the full breadth of US prediction markets) is what matters here.
| Step | Platform | Bonus type | Last verified |
|---|---|---|---|
| 1 | Polymarket | Trading credit (current welcome offer; terms vary) | May 27, 2026 |
| 2 | Coinbase | Cash welcome (current welcome offer; terms vary) | May 27, 2026 |
| 2 alt | Kraken | Fee revshare (recurring) | May 27, 2026 |
| 3 | Kalshi | Trading credit (current welcome offer; terms vary) | May 27, 2026 |
| 4 | Robinhood Event Contracts | Reward stock at sign-up (current value varies) | May 27, 2026 |
| 5 (opt) | MoonPay | Discount on card-to-USDC purchase | May 27, 2026 |
Welcome offers change. Verify each platform’s current terms in-app before depositing.
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A worked example — how to claim the stack in 30 minutes
Here is a realistic Saturday-morning version of the stack. Total time, including KYC waits: roughly half an hour of active attention spread across a day.
- Polymarket — sign up via Bellwether’s link, complete KYC (a few minutes), deposit via Apple Pay (amount per the active welcome offer’s minimum), and place a small qualifying trade on any market. The trading credit posts per the active welcome terms.
- Coinbase — open an account, complete KYC, deposit via ACH or debit, buy USDC, and (optionally) withdraw the USDC to your own Polygon wallet for future Polymarket funding. Welcome bonus posts once new-account funding criteria are met.
- Kalshi — sign up with our referral link, deposit a small amount via ACH (same-day settlement), place a small qualifying trade. The trading credit posts per the active referral terms.
- Robinhood Event Contracts — if the current promo is live, sign up or enable event contracts on your existing account, complete the qualifying activity per the in-app promo terms. Reward stock (current value varies) posts on KYC clearance.
Net position after about 30 minutes of active sign-up time: modest deposits across accounts, returning a mix of trading credit and (in the case of Coinbase) cash welcome. Your deposits remain your money — you can trade them, withdraw them after meeting any clearing requirements, or use them as working capital for future positions. Trading event contracts involves risk of loss — you can lose your entire deposit on top of any bonus.
Step-by-step — Polymarket sign-up
Polymarket is the largest prediction market by volume globally and the platform we recommend first.
- Visit Polymarket using our link — the partner identifier travels in the URL, which is what tells Polymarket which welcome offer to apply. If you arrive without a tracked link, you can still enter a code at sign-up.
- Complete KYC with a driver’s license or passport plus a selfie. Approval usually takes a few minutes; in rare cases up to 24 hours.
- Tap Deposit, choose Apple Pay, Google Pay, debit card, or ACH, and deposit at least the active welcome offer’s minimum.
- Place your first event-contract trade in any market to clear the qualifying-trade requirement. Your trading credit posts to your balance per the active offer’s terms.
We may earn a commission when you sign up. Learn more.
Step 1 — Open my Polymarket account
Use the sign-up link above · Complete KYC · Trade my first event contract today.
Yes, open my Polymarket account →
Apple Pay accepted · ~5 minutes to fund · Trading event contracts involves risk of loss. Promotional offers do not eliminate trading risk. You can lose money on prediction markets. US residents only. State availability varies — sports event contracts restricted in some states. Terms apply.
For more depth, read the Polymarket promo code breakdown or our Polymarket safety and custody review.
What stack-completers actually say:
“Did Polymarket → Coinbase → Kalshi on a Saturday morning over coffee. Claimed all three welcome offers in about 40 minutes including KYC waits. Not life-changing money, but it paid for my first month of small positions on each platform.”
— Synthesis of r/Polymarket and r/Kalshi threads, Q1–Q2 2026
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Step-by-step — Kalshi sign-up
Kalshi is the longer-running CFTC-regulated US prediction market — USD-native, no crypto rails, simpler for users who prefer a traditional broker experience.
- Click through our Kalshi referral link. The credit is applied automatically through the link; you do not need to enter a separate code.
- Complete KYC (driver’s license or passport). Approval is typically same-day.
- Tap Deposit, link your bank via Plaid for ACH, and deposit per the active welcome offer’s minimum. ACH on Kalshi settles same-day for most banks.
- Place a qualifying trade. The exact threshold is shown in the Rewards section after sign-up. Your trading credit posts within a few days of clearing.
We may earn a commission when you sign up. Learn more.
Step 3 — Open my Kalshi account
Sign up via our link · Deposit via ACH · Place one qualifying trade today.
Same-day ACH on most banks · Trading event contracts involves risk of loss. Promotional offers do not eliminate trading risk. You can lose money on prediction markets. US residents only. State availability varies. Terms apply.
For more, see the Kalshi promo code page, our Kalshi breakdown, and head-to-head: Kalshi and Polymarket.
Step-by-step — Robinhood Event Contracts sign-up
Robinhood Event Contracts is the broker-side option. If you already use Robinhood for stocks or options, enabling event contracts is the fastest possible second step.
- Open the Robinhood app or visit the desktop site. Existing users tap Trade then Event Contracts; new users complete the standard Robinhood account opening first.
- Confirm event-contract trading eligibility — this is enabled on a per-state basis, and Robinhood will tell you whether contracts are available in your state.
- Fund the account if needed (existing Robinhood balances work). Check the current promo terms in-app for the qualifying deposit and trade thresholds. Promotional offers cycle, so the headline structure changes month to month.
- Place the qualifying event-contract trade. Promo credit posts per the terms of the active offer.
We may earn a commission when you sign up. Learn more.
Step 4 — Claim my Robinhood reward stock
Open my account via our link · Enable Event Contracts · Place my first qualifying trade.
Yes, claim my Robinhood reward stock →
Reward stock is a randomized Robinhood feature; current value varies. Trading event contracts involves risk of loss. Promotional offers do not eliminate trading risk. You can lose money on prediction markets. US residents only. State availability and promo terms vary — verify the active offer in-app before depositing. Terms apply.
See the Robinhood Event Contracts bonus deep dive for the current cycle.
Step-by-step — Coinbase or Kraken sign-up
You will need USDC eventually if you want to fund Polymarket outside of the Apple Pay / ACH on-ramps — or simply hold USDC for fast deposit during a breaking-news market. Pick one of the two depending on your usage pattern.
- Open an account at Coinbase (simpler, friendlier for first-time crypto users) or Kraken (cheaper on size, better for ongoing USDC trading).
- Complete KYC. Both platforms approve most US applicants within minutes.
- Fund the account via ACH, debit, or wire. Buy USDC. For Polymarket funding later, withdraw the USDC to your own wallet on the Polygon network — send only USDC on Polygon, never on Ethereum mainnet or another chain, or the funds will be lost.
- Welcome offers on both platforms rotate; verify in-app before depositing. Kraken’s fee revshare is recurring rather than a one-off welcome credit.
We may earn a commission when you sign up. Learn more.
Step 2 (Coinbase) — Open my Coinbase account
Sign up via our link · Buy USDC · Bridge to Polygon for Polymarket funding.
Yes, open my Coinbase account →
Step 2 alt (Kraken) — Open my Kraken account
Sign up via our link · Buy USDC · Get the recurring fee revshare.
Buying and holding crypto involves risk of loss including total loss of principal. Stablecoin pegs can fluctuate. Promotional offers do not eliminate trading risk. You can lose money on prediction markets. US residents only. Terms apply.
For the full walkthrough, read USDC, Apple Pay, ACH — every Polymarket funding method.
The honest fine print
Read this section before claiming anything. We have seen too many people sign up assuming the headline number lands in their bank account — it does not.
- Bonuses are trading credits, not cash. Almost every offer on this page is credit you can trade with on the platform. It is real value, but it is not money you can withdraw the day it posts. The exceptions are Coinbase’s CPA-style welcome bonus (cash to your account) and a portion of the Robinhood promo, depending on terms.
- Qualifying trades and minimum deposits are non-negotiable. Skipping the promo code at sign-up, depositing below the minimum, or failing to complete the qualifying trade within the window are the three reasons most people fail to claim. Read the terms before you deposit.
- Credits can expire. Most trading credits have a usage window measured in weeks. Use them.
- US-only and state-dependent. Every platform on this page is restricted to US residents who pass KYC. Polymarket and Kalshi both have state-level restrictions on sports event contracts; verify availability in your state before depositing.
- KYC is required. No platform will pay you a bonus without verified identity. Have your driver’s license, passport, or state ID ready.
- Risk of loss applies on top of the bonus. Trading event contracts is not a risk-free way to make money. You can lose your deposits, and you can lose any trading credit by taking positions that resolve against you. The math only works in your favor if you trade thoughtfully — and even then, individual contracts can resolve against you.
Trading event contracts involves risk of loss — you can lose your entire stake. If you or someone you know has a gambling problem, call 1-800-GAMBLER.
By Avery Chen · Markets Editor, Bellwether · Last updated: May 27, 2026 — we update this page when promo terms change, regulators issue new guidance, or new platforms launch.
What stack-completers say about the realistic numbers:
“Don’t expect the high end. I claimed welcomes across Polymarket, Kalshi, Coinbase, and Robinhood in one Saturday morning. Most of the offers were rotating partner codes — the headline numbers you see on review sites are the maximum, not the median. Still a fine trade for 30 minutes of work, but anyone advertising ‘easy’ big numbers is selling the maximum.”
— Composite of Reddit and Trustpilot reports, Q1–Q2 2026
Why we recommend the stack — not a single platform
A reasonable question: why open four or five accounts instead of just picking your favorite platform and putting the full deposit there? Three reasons.
Welcome value is most efficient when stacked. Each platform’s marketing budget pays the most for your first deposit. After that first qualifying trade, you are a normal user on standard fees. Concentrating your deposits on one platform leaves the other welcome offers on the table — those bonuses exist whether you claim them or not.
Each platform has real category strengths. Polymarket has the deepest liquidity and broadest market catalog. Kalshi has the cleanest US-broker experience and the strongest weather and economic contracts. Robinhood gives you event contracts inside the same app as your stocks. The on-ramp accounts are infrastructure you will want for future deposits anyway. Trading across all of them teaches you which platform genuinely fits each kind of market you care about.
Comparison data is more valuable than affiliation. The most useful thing you can do as a new prediction-market user is form your own opinion about which platform you actually prefer. The stack — the best prediction market bonuses 2026 has on offer, taken together — is the cheapest way to test all of them with real money, on someone else’s nickel. After a month of trading you will know — not from reviews, but from your own experience — which platform you want to consolidate on.
Common mistakes that void bonuses
Five mistakes account for the majority of failed bonus claims. Avoid them.
- Skipping the promo code at sign-up. Polymarket codes must be entered during the sign-up flow — they cannot be applied retroactively to existing accounts. If you forget the code, you forfeit the bonus.
- Depositing below the qualifying minimum. A deposit below the minimum claims nothing. Deposit at or above the threshold set by the active welcome offer.
- Missing the qualifying-trade window. Most platforms require a first trade within a set number of days. Place a small trade immediately after funding rather than waiting.
- Withdrawing your deposit before the credit clears. Some promos require your initial deposit to sit in the account through the qualifying trade. Pulling it out early voids the credit.
- Using a VPN or mismatched KYC details. Bank-account name mismatches, VPN-masked locations, or mid-flow KYC swaps all flag the account for review. Sign up with consistent, real identity details from the start.
Ready to move?
You’ve seen the depth. If you’ve decided where to start, here’s the shortest path to a funded account:
- Polymarket route (current welcome offer, terms vary): Open my Polymarket account →
- Kalshi route (current welcome offer, easiest US flow): Open my Kalshi account →
- Robinhood Event Contracts route (if you already use Robinhood): Claim my Robinhood reward stock →
- USDC on-ramp first? Open my Coinbase account → so funding is ready before Polymarket needs it
- Want the deepest single-platform read first? Read head-to-head: Kalshi and Polymarket before committing.
FAQ
Can I really stack all these bonuses without breaking any rules?
Yes. Each offer is a real welcome bonus on a separate, regulated platform. Polymarket, Kalshi, Robinhood, Coinbase, and Kraken are all distinct entities with their own marketing budgets. None of them have shared-account rules that prevent you from holding accounts at the other platforms. The stack is exactly how informed users approach the category in 2026.
Are these bonuses cash I can withdraw, or trading credit?
Mostly trading credit. Polymarket’s and Kalshi’s welcome credits are trading credit — real value you can use on the platform, but not cash to your bank until you have traded it. Coinbase’s welcome bonus is closer to cash (deposited into your account balance). Robinhood’s reward stock is sellable for cash. Welcome offer structures rotate — read the active offer terms.
Will I get audited for stacking sign-up bonuses?
No. Sign-up bonuses are a marketing expense for the platforms, not income you need to report uniquely. You will receive standard tax documents (1099-MISC from Kalshi, similar from others) reporting your trading activity — the bonuses are reflected in the gross numbers, not as separate audit-flagged items. Consult a tax professional if you have specific questions about how trading credits flow through your return.
Can I withdraw the bonus directly without trading?
No. Every trading-credit bonus requires you to use the credit to trade. The credit value is realized through trading P&L, not through withdrawal. The Coinbase CPA-style bonus is the closest thing to cash but still requires meeting the new-account funding criteria.
What if I’m in a restricted state?
Verify in-app before you deposit. Polymarket and Kalshi both honor state-level restrictions on sports event contracts (Nevada and Tennessee are the most aggressively restricted as of May 2026). Robinhood Event Contracts has its own state-availability list. Non-sports markets are accessible in most states; sports markets vary. If a platform is fully blocked in your state, sign-up will not complete and no bonus is forfeited because none was triggered.
How long does each bonus take to credit?
Polymarket: trading credit posts within minutes of the qualifying trade. Kalshi: usually within a few days. Robinhood: per the active promo terms (typically days). Coinbase: the welcome bonus posts after the new-account funding criteria are fully met, which can take a week or two. Kraken’s revshare is recurring and visible in your account dashboard.
Do I need to be a US citizen, or just a US resident?
US resident with valid US identity documents. Citizenship is not required, but every platform requires KYC against US-issued ID and proof of US address. If you are visiting the US temporarily, none of these accounts are available to you.
Can I do the stack on a single deposit instead of spreading deposits across accounts?
No. Each platform’s welcome bonus requires a deposit on that specific platform. Depositing everything to Polymarket triggers only Polymarket’s promo. To claim multiple bonuses you have to make a qualifying deposit on each platform separately.
How often do the promo codes and bonus values change?
Polymarket partner codes have been stable through 2026, but partner-code values rotate. Robinhood’s Event Contracts promo cycles more aggressively (monthly windows of different sizes). Kalshi’s referral value has been steady over the past year, with occasional elevated windows. We update this page when any value changes.
Should I do the full stack, or pick the best two or three?
If your goal is maximum welcome value, do the full stack. If your goal is a single high-quality second account beyond Polymarket, the next-best individual move is Kalshi (fast funding, regulated USD venue, useful for comparison). Coinbase or Kraken is worth doing whenever you expect to fund Polymarket beyond the Apple Pay / ACH limits.
Where to go next
Once you have worked through the stack, the rest of the site goes deeper on each individual platform and the funding mechanics.
- Polymarket promo code (May 2026) — how the welcome program works and where to verify the current offer.
- Kalshi promo code (May 2026) — Kalshi-specific referral details and how to claim.
- Robinhood Event Contracts bonus (May 2026) — the live promo cycle and what to watch for.
- How to fund Polymarket from the US — Apple Pay, ACH, debit, wire, and direct USDC walkthroughs.
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