Making your contract exactly
If a team reaches at least its bid in points, the contract is made: hitting the bid exactly is enough.
The success threshold
To make its contract, the bidding team must score points at least equal to its bid. Bid 90 and make 90 (or more): success. Make 89: failure. The contract is decided to the point.
How much do you score?
Contract made, the most common scale: the team scores the bid amount + the points actually won in tricks, or, depending on the variant, the bid plus the full 162. A frequent example: a 90 contract made with 100 in points scores 90 (bid) + 100 (cards), while the opponents score their own points (62). Agree on the exact scale before the game.
The 82-point edge case
Since a deal is worth 162, a successful 80 bid implies the attack made at least 82 (it must reach 80 of the shared total, and the 81-81 split is a tie). Making the bid exactly still counts as a success, as long as you're not below it, not even by a single point.
See also
FAQ
Must you beat your bid or is matching it enough?
Matching is enough: if the team reaches exactly its bid in points, the contract is made. You just must not fall below it.
How much do you score when you make your bid exactly?
Under the common scale, the team scores the bid amount plus the points won in tricks. The opponents score the points they themselves collected.