Update, Thursday, September 10:
The season opener in Seattle is in the books, and tonight the NFL goes to Australia: 49ers vs. Rams at the Melbourne Cricket Ground (8:35 p.m. ET, Netflix). Every code on this page is live for it.
returns a $50 bonus on a $10 first deposit, Kalshi code DIMERS matches a $25 deposit with $25, and DraftKings is paying $200 in bonuses on a $5 first bet with no code required. The Rams are priced at 63% on Kalshi and 64% on Polymarket; Dimers’ model has Los Angeles at 62.9% to win. Friday brings Rutgers–Boston College and Missouri–Kansas, Saturday brings Ohio State–Texas, and Sunday brings 13 NFL games. This guide is refreshed daily through NFL Week 1 and College Football Week 2, with the games closest to kickoff moved to the top.
Prediction markets and sportsbooks have both rolled out their biggest new-user bonuses of the year for the opening week of football, and for the first time the two categories are competing for the same deposit. Polymarket, Kalshi, Underdog and Novig are trading NFL and college football as event contracts priced from 1¢ to 99¢; DraftKings and Bet365 are running conventional bonus-bet deals alongside. Every one of those bonuses, the code that unlocks it, and what the markets are pricing for this week’s games is below, in one place.
All six bonuses below are verified and active as of September 10, 2026. Where a code is listed, it goes in the promo or referral field during registration; where none is listed, the bonus attaches automatically through the link.
| Operator |
Type |
Code |
Current offer |
What it costs |
|
Prediction market |
DIMERS |
$50 bonus in trading funds ($60 total) |
$10 first deposit |
|
Prediction market |
DIMERS |
$25 bonus in trading funds ($50 total) |
$25 first deposit |
|
Sportsbook and prediction market |
No code required |
$200 in bonuses, paid as $50 every 7 days over 21 days |
$5 first bet |
|
Prediction market and pick’em |
DIMERS |
$50 in bonus entries, plus Keep Your Million access |
$5 first play |
|
Prediction market |
No code required |
$25 in trade credits |
$10 first deposit |
|
Sportsbook |
No code required |
$365 in bonus bets, win or lose ($150 in IL and TN) |
$10 first bet |
Measured against the deposit, the Polymarket code DIMERS is the most efficient of the six: $50 back on $10 in, credited the moment the deposit clears, with no trading-volume requirement before the bonus is yours. Kalshi’s $25-for-$25 is the cleanest one-to-one match on a prediction market. DraftKings has the largest headline number, though its $200 arrives in three weekly installments of bonus bets rather than as cash you can trade tonight.
Tonight in Melbourne — 49ers Vs. Rams (Thursday, 8:35 P.m. ET, Netflix)
The NFL’s regular-season game at the Melbourne Cricket Ground kicks off Thursday night US time, and the markets treat it as a Rams game. Dimers’ model, built from 10,000 simulations of the game, gives Los Angeles a 62.9% chance to win and sets the line at Rams −3.5. Here is how the two prediction markets are pricing it. On Kalshi, the “chance” percentage is the implied probability and the Yes/No prices are what a $1 contract costs; on Polymarket, each percentage is the implied probability and the multiplier is the payout per $1 if that side wins.
| Market |
Kalshi (chance / Yes price) |
Polymarket (chance / payout) |
Dimers model |
| Rams to win |
63% — Yes 65¢ |
64% — 1.55x |
62.9% |
| 49ers to win |
36% — Yes 37¢ |
36% — 2.78x |
37.1% |
| Rams to win by over 3.5 |
49% — Yes 50¢ |
50% — Yes 50% |
Rams −3.5 |
| Over 47.5 total points (Kalshi) / Over 48.5 (Polymarket) |
51% — Yes 52¢ |
48% — Yes 48% |
— |
Kalshi’s 49ers–Rams market has traded $1.15 million, and the spread is a coin flip on both platforms. Christian McCaffrey is priced at 57% on Kalshi and 58% on Polymarket to score an anytime touchdown, with Kyren Williams at 54% and Puka Nacua at 41% on Kalshi behind him; Davante Adams sits at 39% on Kalshi and 43% on Polymarket. Polymarket’s game props have the Rams at 57% to lead at halftime. Yes and No prices on these platforms come from separate order books and will not always sum to 100.
Friday Night on Prediction Markets — Rutgers at Boston College (7:30 P.m. ET) and Missouri at Kansas (8:00 P.m. ET)
Friday belongs to college football, and the two games worth trading are an ACC–Big Ten crossover in Chestnut Hill and a Border War in Lawrence. Dimers’ model has Boston College at 61.0% to beat Rutgers and sets the line at BC −3.5; it has Missouri at 65.7% at Kansas, MIZ −5.5.
| Market |
Kalshi (chance / Yes price) |
Polymarket (chance / payout) |
Dimers model |
| Boston College to win |
60% — Yes 61¢ |
60% — 1.67x |
61.0% |
| Rutgers to win |
40% — Yes 40¢ |
40% — 2.47x |
39.0% |
| Boston College to win by over 3.5 |
46% — Yes 46¢ |
48% — Yes 48% |
BC −3.5 |
| Over 54.5 total points (Kalshi) / Over 53.5 (Polymarket) |
49% — Yes 49¢ |
52% — Yes 52% |
— |
The Rutgers–Boston College market has been the most volatile of the week’s college boards, swinging from a pick’em to BC 65% and back before settling at 60% on both platforms. Dimers’ full read on both games is on the
Rutgers vs. Boston College
and
Missouri vs. Kansas
prediction pages.
Every code on this page works on college football as well, and Saturday has one of the best regular-season games of the year. Prices below are the implied probabilities from Kalshi and Polymarket alongside Dimers’ model; kickoff times are Eastern.
Ohio State–Texas is the week’s liquidity magnet: Kalshi’s market has traded $489,000 and has flipped between the two sides repeatedly since May before settling at Texas 53%. The 1.5-point spread is 51% on both platforms, and the total of 49.5 is 49% to go over on Kalshi and 50% on Polymarket — three separate coin flips on one game. At the other end, Oregon at 93–94% against Oklahoma State is what a lopsided market looks like: a Ducks contract pays 1.06x, and the spread market (Oregon by over 22.5 on Polymarket, 23.5 on Kalshi) is where the price discovery is actually happening, at 52% and 48% respectively. Dimers’ predictions for every Week 2 game are on the
college football predictions hub.
Sunday, September 13 — Dimers Predictions and Prediction Market Prices for Every NFL Week 1 Game
Thirteen games run Sunday, and every one of them is a live market on Polymarket and Kalshi. The table below is Dimers’ model on each matchup; the prediction-market prices for the Sunday night game follow it, and the other Sunday boards are linked for live tracking.
Sunday Night Football is the most-traded of the Sunday markets so far. Kalshi has the Cowboys at 59% (Yes 61¢) on $471,000 of volume, with Dallas to win by over 2.5 at 55% and the over on 48.5 points at 49%. Polymarket has Dallas at 60% (1.65x) and the Giants at 40% (2.5x), with the same 2.5-point spread trading at 55%. Jaxson Dart is 33¢ on Kalshi to score an anytime touchdown and Cam Skattebo is 48¢. The Chargers at 78.9% and the Jaguars at 75.5% are the two heaviest favorites on Dimers’ Sunday board.
Monday, September 14 — Broncos at Chiefs (8:15 P.m. ET, ESPN/ABC)
The Week 1 finale is the closest market of the week and the one where Dimers’ model and the prediction markets disagree most. Dimers has Kansas City at 58.6% and −2.5; Kalshi has the Chiefs at just 55% (Yes 57¢) with the 2.5-point spread at 50%, and Polymarket has them at 56% (1.79x) with Denver at 44% (2.25x). On Kalshi’s touchdown board, Travis Kelce is 33% to score an anytime touchdown and Xavier Worthy 23%. The
Broncos vs. Chiefs live odds page
updates through kickoff.
Polymarket Code DIMERS — $50 Bonus on a $10 Deposit (verified September 10, 2026)
Polymarket Code DIMERS guarantees the popular "free $50" promo for NFL and NCAAF markets this September.
The Polymarket code DIMERS is the headline bonus of the week. New users who enter it at registration and deposit $10 receive $50 in trading funds, for a $60 opening balance that works on every open Polymarket market, from tonight’s 49ers–Rams contracts to the 2028 presidential nominee markets. It is a flat credit, not a matched-volume promotion: there is no minimum number of trades before the $50 is usable. Our
Polymarket code DIMERS announcement for the season opener
carries the full deposit-and-bonus walkthrough.
-
and select Sign Up.
- Enter the Polymarket code
DIMERS
in the promo/referral field during registration. It cannot be added to an existing account.
- Complete identity verification, which every new Polymarket US account requires.
- Deposit $10. The $50 bonus is credited immediately.
- Trade any open market. Each cent price is the market’s implied probability, and a winning contract pays $1.
Terms in brief: new Polymarket US accounts only, one bonus per user, minimum first deposit $10, bonus of $50 in trading funds, valid across sports, politics, crypto, finance and global-event markets. Withdrawals are subject to Polymarket’s standard terms.
Kalshi Code DIMERS — Deposit $25, Get $25 (verified September 10, 2026)
Kalshi has rebuilt its new-user bonus for the football season as a flat deposit match. Register with the
, deposit $25, and Kalshi adds $25 in bonus funds for $50 to trade. There are no tiers, no trade-count requirement and no qualifying window; the deposit alone unlocks the bonus, and the funds are live across every Kalshi market immediately, including the NFL, college football and player-prop boards priced above. Kalshi is a CFTC-regulated exchange and is available in most US states; the states where it is not are listed in the disclaimer at the foot of this page.
-
and create a new account with the Kalshi code
DIMERS.
- Verify your identity.
- Deposit $25 to receive the $25 bonus, for $50 in total trading funds.
- Trade any market. The “chance” percentage is the implied probability; a Yes contract bought at 65¢ pays $1 if it settles Yes.
DraftKings is the one operator on this page running a single new-user deal across both a sportsbook and a prediction market. New customers who
and place a $5 first bet receive $200 in bonuses, issued as $50 in bonus bets every seven days over 21 days. No promo code is needed; the reward attaches automatically through an eligible link. The $200 is non-withdrawable bonus-bet credit rather than cash, and the deal ends September 20, 2026, which makes this the last full NFL week to claim it.
Underdog Code DIMERS — Play $5, Get $50 in Bonus Entries, Plus Keep Your Million
Underdog runs two products under one login: Underdog Fantasy (Pick’em, Champions and Best Ball) and Underdog Predict, a CFTC-regulated prediction market that mirrors moneyline, spread and total markets as 1¢–99¢ contracts. New customers who register with the
and play $5 receive $50 in bonus entries. Registration also unlocks Underdog’s Keep Your Million promotion, which is still running through NFL Week 1: new users receive a $1,000,000 balance of Milly Bucks, answer up to 20 two-outcome questions, and whatever survives converts to bonus entries worth up to $1,000,000 after a first deposit, subject to a 1x play-through and Underdog’s official rules. Keep Your Million is a separate promotion, not a deposit match.
Novig — Deposit $10, Get $25 in Trade Credits (no Code Required)
Novig is the smallest of the four prediction markets here and the cheapest to try.
who deposit $10 receive $25 in trade credits, a 250% return on the deposit, usable across Novig’s NFL and college football markets. No code is required; the bonus attaches through the link.
Bet365 — Bet $10, Get $365 in Bonus Bets, Win or Lose
Bet365 is running the largest sportsbook bonus of the opening week.
who place a $10 first bet receive $365 in bonus bets whether that bet wins or loses. In New Jersey, Pennsylvania and Michigan the $365 comes with 50 casino spins; in Illinois and Tennessee the bonus is $150. Bet365 is a sportsbook, not a prediction market, so its bonus is paid as bonus bets rather than tradeable funds. The $365 figure is a launch-week number and may not last the season.
Prediction Market Vs. Sportsbook — Which Bonus to Take for NFL Week 1
The difference comes down to what the bonus becomes once it lands. On Polymarket, Kalshi, Underdog Predict and Novig, the bonus is trading funds: you buy a Rams contract at 65¢, it pays $1 if Los Angeles wins, and you can sell the position before kickoff or mid-game if the price moves your way. On DraftKings and Bet365, the bonus is bonus bets: you place them like a normal wager and keep the winnings but not the stake. Prediction markets show a live, tradeable price for both sides of every game; sportsbooks show fixed odds. Neither is universally better, but the entry costs differ sharply, and if the question is how to turn the smallest deposit into the most usable balance for Week 1, the Polymarket code DIMERS at $10 in and $60 out is the answer.
The Polymarket code is DIMERS. New US users who enter it at registration and deposit $10 receive a $50 bonus in trading funds, for a $60 opening balance. It is verified and active as of September 10, 2026.
The Kalshi code DIMERS returns a $25 bonus on a $25 first deposit, for $50 in total trading funds. Kalshi treats promo codes and referral codes as the same thing, so either label applies to DIMERS.
No. The DraftKings deal of $200 in bonuses on a $5 first bet attaches automatically when you sign up through an eligible link. The bonuses are paid as $50 in bonus bets every seven days over 21 days, and the deal ends September 20, 2026.
Is the Underdog $1 Million a Deposit Match?
No. Keep Your Million is a separate promotion in which new users play a game of up to 20 questions with a $1,000,000 Milly Bucks balance and keep whatever survives as bonus entries, up to $1,000,000, after a first deposit. The standard new-user bonus with code DIMERS is $50 in bonus entries on a $5 play.
Yes. DIMERS is the code on Polymarket, Kalshi and Underdog, and each is a separate new-user bonus on a separate platform. DraftKings, Novig and Bet365 need no code.
Which States Can Trade on Kalshi and Polymarket?
Polymarket US is open to eligible new accounts nationwide. Kalshi is available in most states but not in Arizona, Illinois, Massachusetts, Maryland, Michigan, Montana, New Jersey or Ohio. Underdog’s fantasy bonus is not valid in Maryland, Michigan, New Jersey, New York, Ohio or Pennsylvania; Underdog Predict is available more broadly to US residents 18 and over.
Conclusion — Use Polymarket Code DIMERS Before 49ers–Rams Kicks Off in Melbourne Tonight
Six bonuses are live for the opening week of football, and the only one that turns $10 into $60 before tonight’s kickoff is the
. Kalshi code DIMERS adds $25 on a $25 deposit, DraftKings pays $200 over three weeks on a $5 bet, Underdog pairs $50 in bonus entries with Keep Your Million, Novig turns $10 into $25 in trade credits, and Bet365 pays $365 in bonus bets on a $10 wager. This page will be updated each morning through Monday night’s Broncos–Chiefs game with the day’s kickoffs, prices and any change to the bonuses above.
Polymarket: Offer valid for new Polymarket US accounts only; one bonus per user. Deposit $10 with code DIMERS to receive $50 in trading funds. Subject to Polymarket’s terms.
Kalshi: Must be 18 years or older and have a legal, U.S. residential address within the applicable state, D.C., or U.S. territories. Not available in AZ, IL, MA, MD, MI, MT, NJ, and OH. Deposit $25 and receive a $25 bonus in trading funds; bonus funds must be traded before any resulting funds can be withdrawn. New Kalshi accounts only; one offer per user.
Underdog: Must be 18+ (19+ in AL, NE; 19+ in CO for some games; 21+ in AZ, MA, and VA) and present in a state where Underdog Fantasy operates. Terms apply. Offer not valid in MD, MI, NJ, NY, OH, and PA. Concerned with your play? Call 1-800-MY-RESET or 1-800-GAMBLER or visit
; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369). Trading involves risk, including total loss on positions. Trading decisions and their consequences are your sole responsibility. Nothing on underdogexchange.com constitutes a recommendation, solicitation, or offer to buy or sell any financial instrument. UDX is subject to CFTC regulatory oversight. Promotion issued by affiliate.
DraftKings, Bet365 and Novig: 21+ (18+ where permitted) and physically present in an eligible state. New customers only. Bonus bets and trade credits are non-withdrawable and subject to each operator’s terms. Gambling problem? Call 1-800-GAMBLER.
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