Bridge Scoring Explained: Points, Games & Slams
Scoring is what gives every bid its meaning. Once you see how points are won and lost, the whole logic of bidding falls into place — this guide breaks it down without the intimidating tables.
Why Scoring Shapes the Whole Game
In bridge you are not just trying to win tricks — you are trying to win points, and points are tied to the contract you bid. Bidding and making a game scores far more than quietly making the same tricks in a part-score, which is exactly why experienced players stretch to bid games and slams when the values are there.
There are two common scoring systems — rubber bridge (the traditional home game) and duplicate bridge (the club and tournament format). The trick values are the same in both; what differs is the bonuses and how results are compared. We will use duplicate-style scoring here, as it is what you will meet online and in clubs.
Trick Values — What Each Contract Is Worth
Every trick you bid and make beyond the first six scores a fixed number of points. No-trump pays a little extra for the first trick because it is harder to play without a trump suit.
Points per bid-and-made trick
So 4♥ bid and made is 4 × 30 = 120 trick points; 3NT is 40 + 30 + 30 = 100; 5♣ is 5 × 20 = 100. Reach 100 or more trick points in a single contract and you have bid a game.
Game, Part-Score and the Magic 100
The number 100 is the hinge of the whole scoring system. A contract worth 100+ trick points is a game and earns a large bonus; anything less is a part-score and earns only a small one.
The game-going contracts
This is why 3NT and the major-suit games dominate bidding: they reach game with the fewest tricks. Conventions like Stayman and Jacoby transfers exist largely to find those major-suit games.
Bonuses, Slams and Vulnerability
On top of trick points you collect bonuses. A part-score adds a flat 50. A game adds 300 when you are not vulnerable and 500 when you are vulnerable. Bid and make all the tricks and you earn a slam bonus on top.
The big bonuses
Vulnerability is a status, set in advance for each hand, that raises both the rewards for making a contract and the penalties for failing. It rotates through the four players over a session so everyone meets it equally. The lure of the bigger slam bonuses is what drives the slam conventions in our Blackwood guide.
Going Down — the Penalties
If you do not take as many tricks as you contracted for, you go “down” and your opponents score penalty points instead. Each trick short is called an undertrick.
This trade-off is the heart of competitive bidding: it is often right to bid one more, even expecting to go down, if the penalty costs less than letting the opponents make their contract. That single idea — the “sacrifice” — only makes sense once you understand scoring.
A Worked Example
You and your partner bid and make 4♠, not vulnerable. Here is the score, step by step:
Trick points
4 spades × 30 = 120.
Game bonus
Not vulnerable game = 300.
Total: 120 + 300 = 420 points. Had you stopped in 3♠ and made the same ten tricks, you would have scored 90 trick points plus only a 50 part-score bonus — 140 in total. Bidding the game was worth nearly 300 extra points, which is the whole reason the auction matters.
Key Takeaways
- Tricks score 20 (minors), 30 (majors), 40 then 30 (NT) above the first six.
- 100+ trick points in one contract is a game; below that is a part-score.
- 3NT, 4♥/4♠ are the cheapest games — the targets most auctions aim for.
- Slams (12 or 13 tricks) and vulnerability add large bonuses.
- Going down costs 50 or 100 per undertrick — more if doubled.
Related Guides
Frequently Asked Questions
A contract worth 100 or more trick points — 3NT, 4 hearts, 4 spades, 5 clubs or 5 diamonds. Reaching game earns a large bonus, which is why bidding aims for it whenever the points are there.
In rubber bridge, a rubber is won by the first side to make two games. Each game requires 100 trick points, which can be reached in one game-going contract or accumulated across several part-scores.
Vulnerability is a status set for each hand that increases both the bonus for making a game or slam and the penalty for going down. It rotates over a session so all players experience it equally.
Undoubled, 50 points per undertrick when not vulnerable and 100 when vulnerable. If the contract was doubled, penalties rise sharply with each additional undertrick.
A small slam (12 tricks) earns 500 not vulnerable or 750 vulnerable; a grand slam (all 13 tricks) earns 1000 or 1500. These bonuses are on top of the trick and game scores.
Most online sites use duplicate-style scoring, the same as clubs. Some casual rooms offer rubber scoring. The trick values never change; only the bonuses and how results are compared differ.