Lottery Pool Calculator

Continue in the tool

More pages for this tool

official vs informal lottery pool

Official vs informal lottery pool

An official pool is sold by the lottery operator or a retailer and each share has its own receipt; an informal pool is agreed by a group that buys the tickets and keeps the proof. Neither changes the chance of winning. What changes is fees, limits and who is answerable for what. On this page only facts that an open source confirms are used, and anything the press reports is credited to the outlet.

What is known and what is not confirmed

According to the newspaper O Povo (Nov 2026, describing Mega-Sena), the official Brazilian pool allows 2 to 100 shares, with up to 10 bets per receipt, all with the same count of numbers, and the retailer may charge an additional service fee. The paper gives no amount for that fee, and the Caixa website blocks automated reading. For that reason the minimum share price and the fee ceiling that circulate on other sites are left out: confirm them directly with Caixa.
The limits math is simple. Ten bets with 6 numbers cost BRL 60.00; across 2 shares that is BRL 30.00 each, and across 100 shares it is BRL 0.60. An informal pool can go beyond those limits: 12 tickets, 150 shares, or a single person holding 3 shares. The calculator warns when your pool falls outside the format the press describes, without blocking the math. If your group wants Caixa's per-share receipt, keep the pool inside those ranges.
In an informal pool, safety comes from paper and witnesses: an agreement with names and shares, a photo of the receipt in the group chat and a SHA-256 fingerprint of the text. None of that is an official seal. In exchange there is no retailer fee and the group picks the format. The prize arrives through one person and is then passed on, so agree on the timing. On the Mega da Virada, according to the press, the split is 90% sena, 5% quina and 5% quadra, with no rollover.

Official pool limits applied to 10 bets

Smallest official pool

Input: 10 x 6.00 / 2
Expected output: BRL 30.00

Two shares of BRL 30.00, the minimum share count the press cites.

Largest official pool

Input: 10 x 6.00 / 100
Expected output: BRL 0.60

One hundred shares of BRL 0.60 in pure math; confirm the per-share minimum with Caixa.

Over the bet limit

Input: 12 bets
Expected output: outside the described format

More than 10 bets per receipt is outside the format; among friends it is fine.

A single share

Input: 1 member, 1 share
Expected output: outside the described format

The cited format starts at 2 shares; a pool with one member is not a pool.

Mega da Virada split

Input: 90 + 5 + 5
Expected output: 100

Sena, quina and quadra, according to O Povo and Seu Dinheiro.

Full tool FAQ

How do I work out the price of each share in a lottery pool?

Divide the total cost by the number of shares. Five Powerball tickets at $2 cost $10; split in 4 equal shares, each is $2.50. When the division does not come out even, such as $10 in 3 shares ($3.3333...), the calculator works in cents: 1,000 cents divided by 3 is 333 each with 1 left over, so one person pays $3.34 and two pay $3.33, adding up to exactly $10.00.

Does a lottery pool improve your chances of winning?

How do you split lottery pool winnings fairly?

What is the difference between an official pool and a pool among friends?

Are lottery pool winnings taxed?

Does the Mega da Virada roll over if nobody wins?

How do I run an office lottery pool without drama?

What should you do when someone does not pay their share on time?

What is the SHA-256 fingerprint on the agreement for?

Is my pool data saved anywhere?

Frequently asked questions

How many shares can an official Caixa pool have?

According to O Povo (Nov 2026), from 2 to 100, with up to 10 bets per receipt. The report is about Mega-Sena; confirm with Caixa whether it applies to your game.

Does the retailer charge to organize a pool?

According to O Povo, a retailer may charge an additional service fee, though the text gives no amount. Other sites quote percentages, but they could not be confirmed with Caixa. Ask for the amount before you buy a share.

Is an informal pool safe?

It is as safe as the agreement. Without a per-share receipt, everything depends on one person keeping the proof and paying out the prize. Lower the risk with a written agreement, a photo of the receipt in the group and a fingerprint of the text.

Does an official pool improve the odds?

No more than an informal pool with the same tickets. The chance depends on the number of distinct tickets: ten 6-number tickets give 1 in 5,006,386 for the top tier, in any pool format.

Next steps

Official vs informal lottery pool

What is known and what is not confirmed

According to the newspaper O Povo (Nov 2026, describing Mega-Sena), the official Brazilian pool allows 2 to 100 shares, with up to 10 bets per receipt, all with the same count of numbers, and the retailer may charge an additional service fee. The paper gives no amount for that fee, and the Caixa website blocks automated reading. For that reason the minimum share price and the fee ceiling that circulate on other sites are left out: confirm them directly with Caixa.

The limits math is simple. Ten bets with 6 numbers cost BRL 60.00; across 2 shares that is BRL 30.00 each, and across 100 shares it is BRL 0.60. An informal pool can go beyond those limits: 12 tickets, 150 shares, or a single person holding 3 shares. The calculator warns when your pool falls outside the format the press describes, without blocking the math. If your group wants Caixa's per-share receipt, keep the pool inside those ranges.

In an informal pool, safety comes from paper and witnesses: an agreement with names and shares, a photo of the receipt in the group chat and a SHA-256 fingerprint of the text. None of that is an official seal. In exchange there is no retailer fee and the group picks the format. The prize arrives through one person and is then passed on, so agree on the timing. On the Mega da Virada, according to the press, the split is 90% sena, 5% quina and 5% quadra, with no rollover.

Official pool limits applied to 10 bets

Smallest official pool

Input: 10 x 6.00 / 2
Expected output: BRL 30.00

Two shares of BRL 30.00, the minimum share count the press cites.

Largest official pool

Input: 10 x 6.00 / 100
Expected output: BRL 0.60

One hundred shares of BRL 0.60 in pure math; confirm the per-share minimum with Caixa.

Over the bet limit

Input: 12 bets
Expected output: outside the described format

More than 10 bets per receipt is outside the format; among friends it is fine.

A single share

Input: 1 member, 1 share
Expected output: outside the described format

The cited format starts at 2 shares; a pool with one member is not a pool.

Mega da Virada split

Input: 90 + 5 + 5
Expected output: 100

Sena, quina and quadra, according to O Povo and Seu Dinheiro.

Full tool FAQ

How do I work out the price of each share in a lottery pool?

Does a lottery pool improve your chances of winning?

How do you split lottery pool winnings fairly?

What is the difference between an official pool and a pool among friends?

Are lottery pool winnings taxed?

Does the Mega da Virada roll over if nobody wins?

How do I run an office lottery pool without drama?

What should you do when someone does not pay their share on time?

What is the SHA-256 fingerprint on the agreement for?

Is my pool data saved anywhere?

Frequently asked questions

How many shares can an official Caixa pool have?

According to O Povo (Nov 2026), from 2 to 100, with up to 10 bets per receipt. The report is about Mega-Sena; confirm with Caixa whether it applies to your game.

Does the retailer charge to organize a pool?

Is an informal pool safe?

Does an official pool improve the odds?

No more than an informal pool with the same tickets. The chance depends on the number of distinct tickets: ten 6-number tickets give 1 in 5,006,386 for the top tier, in any pool format.