Guide · Virtual chips · 18+
75-ball bingo: rules, cards, prizes and the accumulated pot
In 75-ball bingo every card has 24 numbers and a free centre cell; balls come out one by one, numbers are marked automatically and there are three prizes per round — line, two lines and full card. On IS Casino, 90% of the card chips sold become prizes, and the accumulated pot is paid with the full card if it lands within the 50th ball.
By IS Casino · Published · Updated
The card
| Column | B | I | N | G | O |
|---|---|---|---|---|---|
| Numbers | 1–15 | 16–30 | 31–45 | 46–60 | 61–75 |
| How many | 5 | 5 | 4 + free cell | 5 | 5 |
Your cards are generated from your client seed: the server does not choose anyone’s cards. You play 1 to 4 cards per round.
The three prizes
- Line
- Completing any of the card’s 12 lines: 5 rows, 5 columns or 2 diagonals.
- Two lines
- Completing two of those lines on the same card.
- Full card
- Marking all 25 cells. The round ends on the ball that completes the first full card.
If several cards complete a prize on the same ball, it is split equally per card.
Where the chips go
| Part | Of the pot | Equals |
|---|---|---|
| Pot (RTP) | 100% | 90% of sales |
| Line | 15% | 13.5% of sales |
| Two lines | 20% | 18% of sales |
| Full card | 55% | 49.5% of sales |
| Accumulated pot | the rest (≈10%) | ≈9% of sales |
The accumulated pot is progressive: it grows every round and is paid with the full card when it lands within ball 50. Whole-chip remainders also go into it, so every chip of the pot reaches players, now or through the accumulated pot.
The rooms
| Room | Card | Balls |
|---|---|---|
| Popular | 10 | 75 |
| Prata (Silver) | 100 | 75 |
| Ouro (Gold) | 1,000 | 75 |
| Bicho | 50 | 100 (see the Bicho room guide) |
In the verification, 1 million Popular room rounds returned 90.07% of sales (the accumulated pot landed 418 times), inside the expected interval around 90%.
A verifiable draw
When card sales open, the SHA-256 hash of the round seed is published. The order of the 75 balls comes from that seed (a Fisher–Yates shuffle driven by HMAC-SHA256). After the draw the seed is revealed and you recompute the ball order and your cards in the browser. The rooms also have house players, who buy cards with house chips and play on equal terms.
Frequently asked questions
How many lines does a bingo card have?
12: 5 rows, 5 columns and 2 diagonals. The free centre cell counts as marked.
Do more cards improve my chances?
Yes, every card is one more chance to complete the prizes, but it also costs more chips; in the 75-ball rooms the return per chip is the same with 1 or 4 cards.
When does the accumulated pot land?
With the full card, when it is completed within the 50th ball in the 75-ball rooms.
