Six Nations Bonus Points: The Grand Slam Bonus Exists to Fix the Bonus Points

The system, in four lines

Win: 4 points. Draw: 2.

Try bonus: 1 point for scoring four or more tries, win or lose.

Losing bonus: 1 point for losing by seven points or fewer.

Grand Slam: 3 points for winning all five matches.

Both bonuses can be earned in the same match — score four tries and lose by a converted try, and you take two points from a defeat.

Why the seven-point margin

Seven is not arbitrary. It is a converted try.

The losing bonus is meant to reward a team that was still in the game at the end, and rugby’s definition of that is precise: could one more score have changed the result? A team seven points down needs a try and a conversion. A team eight points down needs more than one score.

Setting the threshold at a score rather than a round number means the bonus tracks the state of the match rather than an accountant’s preference. It is the same reasoning as the twenty-minute red card — rugby tends to legislate in units the game itself already uses.

What the try bonus is really for

Four tries earns a point, and this is where the system does its most obvious work.

A team leading 20-6 with ten minutes left has, under a plain win-or-lose table, no reason to attack. Kicking the ball out and defending is the rational close to the match.

Give that team a point for a fourth try and the last ten minutes acquire a purpose. Equally, the team losing by 14 has a reason to keep playing rather than accept the result — it can still reach four tries and it can still get within seven.

The bonus point system’s genuine achievement is that it makes the final quarter of a decided match worth watching. That is where most of the value is, because that is where most of the dead time was.

And then the arithmetic bit back

Here is the problem that produced the Grand Slam bonus.

Under four points a win, five wins is 20 points. But a team can add a try bonus to each match, so five wins with four tries every time is 25.

Now consider a team that wins four and loses one — say, losing narrowly with four tries. Four wins with the try bonus is 20, plus 2 from the defeat: 22 points.

If the Grand Slam winner ground out its five victories without ever reaching four tries — 20 points — it finishes below a team that lost a match.

That is not a hypothetical edge case; it is the ordinary consequence of a bonus system laid over a five-match championship. Winning everything is worth 20; winning attractively but not everything can be worth more.

So the Six Nations added three points for a Grand Slam, and three is exactly the right number: it lifts a bonus-free Grand Slam to 23, above the 22 that four wins and a narrow, four-try defeat can produce.

The clause is not a reward. It is a patch — a correction applied to keep the championship’s oldest achievement worth more than anything short of it.

Which tells you what the championship is

A tournament’s points table is a statement about what it values, and the Six Nations table says two things at once.

Attacking rugby is worth rewarding — hence the try and losing bonuses, introduced in 2017 to encourage exactly that.

But winning every match still has to come first. The Grand Slam is the tournament’s founding idea, older than the bonus point, older than professionalism, and the championship was not prepared to let a scoring innovation devalue it.

Most sports discover this tension the other way round: they add an incentive, watch it produce a perverse result, and fix it afterwards under pressure. The Six Nations did the arithmetic first.

Compare the Champions League’s league phase, where a change to the table’s shape had consequences that were argued about only after the first season, and promotion and relegation, where the point of the table is to make its bottom matter as much as its top.

The tie-breaks

If teams finish level on points, the championship is decided on points difference — points scored minus points conceded across the tournament — and then on tries scored.

Note that the second tie-break is tries rather than, say, head-to-head record. That is consistent: a championship that pays a bonus for four tries breaks its ties with tries too.

It also means a team can win the Six Nations on the last afternoon by scoring a try that changes nothing about the match it is playing in. Those are among the tournament’s best moments, and they exist because the rules made a dead ball live.

For the wider rules of the game, see rugby rules and rugby’s 2026 law changes.