Higher Level Maths is the only Leaving Cert subject that pays a bonus. Score a H6 or better and 25 extra CAO points land on top of your maths grade, which is why the maximum CAO score is 625 rather than 600. Simple enough on the surface, but every year students make real decisions, like dropping to Ordinary or grinding out an extra hour a night, based on a fuzzy idea of how the bonus works. So here is the whole scheme, spelled out.
The basic rule
If you sit Higher Level Maths and get a H6 or above, 25 bonus points are added to the points for your maths grade. A H6 is normally worth 46 points; with the bonus it becomes 71. A H1 is worth 100; with the bonus, 125. Get a H7 or H8 and there is no bonus at all, because the scheme only rewards grades of H6 and up, which means 40 percent or more on the Higher paper.
The bonus has been part of the CAO system for years and applies across the Irish higher education institutions, so you do not need to do anything to claim it. It is added automatically when your points are calculated.
When the bonus counts, and when it does not
This is the part people get wrong. Your CAO points come from your best six subjects. The 25 bonus points are added to your maths score first, and then your best six are picked using that boosted figure.
The consequence: if maths, with the bonus included, still is not among your best six subjects, the bonus does nothing for you. In practice that situation is rare, because 71 points for a H6 beats a H5 in any other subject, and boosted maths climbs the rankings fast. But it means one thing clearly: the bonus is not a free 25 points stapled to your total no matter what. It travels with the maths grade.
A quick worked example. Say you have six subjects at H3 (77 points each) and Higher Maths at H6. Without the bonus, maths at 46 points would be your weakest result and would drop out of your best six, leaving 462. With the bonus, maths counts as 71, still below your six H3s, so it stays outside your best six and your total is unchanged. Now swap one of those H3s for a H7 (37 points): boosted maths at 71 walks straight into your top six in its place. Indicative numbers, but that is the mechanism.
What the bonus is really worth
Think of it as a rate of exchange. Moving from an O1 (56 points) to even a H6 (71 with bonus) gains you 15 points, and every Higher grade above that widens the gap. A H4 with the bonus is 91 points, more than an O1 and a half. For students hovering between levels, that arithmetic is usually the deciding argument, and it is the same logic we walk through in how to get a H1 in Leaving Cert Maths: the points ceiling in Higher Maths is simply higher than anywhere else.
The honest counterweight is workload. Higher Maths demands more hours than most subjects, and those hours have to come from somewhere. If chasing the bonus costs you a grade in two other subjects, the trade can turn negative. The bonus rewards students who can hold a H6 or better without letting the rest of their six slide.
The H6 cliff, and how to stay on the right side of it
The scariest feature of the scheme is the cliff at 40 percent. A H6 with the bonus is 71 points. A H7, one percentage point lower, is 37 and no bonus. That is a 34 point swing on a handful of marks, the largest single cliff in the exam.
If you are anywhere near that edge, your strategy is not heroics on the hardest questions. It is ruthless reliability on the routine ones: algebra that never slips, formula work you could do half asleep, and full attempts at every part of every question, because attempt marks are real marks. Daily short practice is what builds that floor under your grade, and it is exactly the kind of studying that fits into fifteen minutes on the bus.
One caveat to keep you honest: grade outcomes depend on the year's marking, so treat any practice score as indicative rather than a promise. And this is an unofficial guide, not affiliated with the SEC, NCCA or CAO.
H1 Owl is a study app built for exactly this: five minute daily drills that keep your floor solid, mistakes that come back until they stick, and mock exams with an indicative grade so you always know which side of the H6 line you are on. Join the waitlist below and get access first.