EquiDiaryHorse vaccination in Ireland: flu rules for racing, showjumping, eventing and the Dublin Horse Show
Last reviewed 6 November 2026
No Irish law requires a horse to be vaccinated against flu. The sport does, and its rulebooks do not agree: racing wants a booster every six months, Showjumping Ireland once a year after a booster at five to seven months, Eventing Ireland holds new courses to the FEI's tighter intervals, and the Dublin Horse Show lets a horse in on its first two doses. One horse that does two of those things can be on time for one and late for the other.
This is a summary of published rules, not veterinary advice. It covers the rules in force in Ireland in 2026; vaccination protocols depend on the product used, and your vet decides what applies. Rulebooks change between seasons, so check the current one before you enter.
In the UK, the US, Australia or Canada? Read the UK vaccination guide, the US one, the Australian one or the Canadian one instead.
What an Irish horse is vaccinated against
- Equine influenza, the vaccine every rulebook is built around. It is a sport requirement rather than a legal one, and it is the reason most owners think about vaccination dates at all.
- Tetanus, recommended for every horse. It is not contagious, so no competition rule needs it, but the bacterium lives in soil and horses are highly susceptible. The Irish Pony Club's eventing rules are an exception: they ask for flu and tetanus to be up to date.
- Equine herpesvirus and strangles, decided with your vet on the horse's risk: a breeding yard, young stock or a lot of travelling.
2026: flu on at least 17 premises
On 30 May 2026 the Irish Equine Centre and the Irish Equine Veterinary Association issued an advisory: since the end of March the centre had confirmed equine influenza on 13 premises, with a virus very closely related to an American strain that had been circulating in mainland Europe for months and had driven a surge of cases in the UK. By 19 June the count stood at 17 premises. The virus matched the recommended vaccine strains, and the clinical signs were reported as more severe in unvaccinated or partially vaccinated horses.
The advice that came with it went beyond any rulebook: vaccinate every horse on a premises, whatever its activity, and give a booster to any horse not vaccinated in the last six months, or a primary course to one never vaccinated. In an outbreak year, a horse at the end of an annual booster interval is in order for showjumping and still the horse the vets worry about.
Four rulebooks, four answers
| Where you compete | Primary course | Boosters | Before competing |
|---|---|---|---|
| Racing (IHRB, Rule 91) | second dose 21–60 days after the first, third 120–180 days after the second | every 6 months | no vaccine in the previous 7 days: six clear days |
| Showjumping Ireland, national shows | second dose 21–92 days after the first, booster 150–215 days after the second | annual, less than 365 days apart | no set waiting period; full recovery from any treatment |
| Eventing Ireland, national events | courses from 2024: 21–60 days, third within 6 months + 21 days; earlier: 21–92 days and 7 months | not more than 12 months apart | none in the 7 days before arrival; the 8th day is allowed |
| Dublin Horse Show | two doses 21–92 days apart are enough for entry | within 12 months of the previous dose | no waiting period stated |
| FEI (international) | courses from 2024: 21–60 days, third within 6 months + 21 days; earlier: 21–92 days and 7 months | at most 12 months apart, and a dose within 6 months + 21 days of arrival | none in the 7 days before arrival |
Racing
The Irish Horseracing Regulatory Board is the strictest, and it applies to every horse that sets foot on racecourse property on a raceday, companion and lead horses included. Under Rule 91 of the 2026 Rules of Racing a primary course is three doses, the second 21 to 60 days after the first and the third 120 to 180 days after the second, and a booster is due within six months. The six-monthly booster has applied to every horse, whatever its primary course, since 1 January 2023. A horse may run before its third primary dose. It may not run if any vaccine was given in the previous seven days, and the rule spells out what that means: six clear days between vaccination and raceday. Advice quoting 21–92 days, 150–215 days and an annual booster for racing describes the rule of 2020.
Showjumping Ireland
Showjumping Ireland's current rulebook is the 2025 edition; no 2026 one was published. Its appendix 11 asks for a primary course of two injections 21 to 92 days apart, a primary booster 150 to 215 days after the second, and an annual booster less than 365 days after the third. SJI's veterinary page says the same with two differences: annual boosters "not more than 12 months apart", which can be a day or two longer than 364 days, and a rule the rulebook does not state, that a dose given later than the rules require means starting the whole sequence again, five-to-seven-month booster included.
SJI sets no waiting period between a dose and a show. Its rulebook's welfare code says only that after any veterinary treatment, sufficient time must be allowed for full recovery before competition, without a number of days, so the checker asks about a dose in the week before rather than saying yes. Nationally SJI never asks for six-monthly vaccination: horses and ponies in FEI classes need that, under the FEI's rule. Vaccinations have to be entered in the passport by a vet; a prize-winner whose passport is not presented, or whose vaccinations are not up to date, is fined €50, and €100 for later offences. Showjumping Ireland also kept the 21–92 days that the FEI and Eventing Ireland narrowed for courses started from 2024, which is where a horse doing both disciplines gets caught. The flu vaccination checker now applies SJI's rule as well as the FEI's.
Eventing Ireland
Rule 17.2 of the Eventing Ireland Rule Book 2026 follows the FEI's change: a course started on or after 1 January 2024 needs its second dose 21 to 60 days after the first and its first booster within six months and 21 days of the second; a course started before keeps 21 to 92 days and seven months, and one started before 2005 needs no first booster at all. Boosters after that are no more than a year apart. A horse may compete once it has had both primary doses, but not one vaccinated in the seven days before it arrives at the event; the rule adds that it can compete on the eighth day. Loose vaccination certificates are not accepted, and a passport with discrepancies in its history means restarting the course. At international events the FEI rule applies instead. The flu vaccination checker applies Eventing Ireland's national rule as well.
The Dublin Horse Show
The RDS's Rule 66, in the 2026 competition schedule, asks every horse entering the showgrounds to be vaccinated against flu, and then admits one on less than most rulebooks would: the primary course of two inoculations 21 to 92 days apart "will suffice for entry", and the booster 150 to 215 days later is, in the RDS's words elsewhere, "not necessary for entry to the Show". After that, the rule wants an annual booster within twelve months of the previous dose. Every vaccination has to be signed by the vet who gave it and authenticated with a practice or Department stamp. International horses follow the FEI's rules.
The two-discipline trap. A horse whose primary course started in 2025 with the second dose 80 days after the first is in order for Showjumping Ireland and the Dublin Horse Show, and broken for Eventing Ireland and the FEI, which allow 60. A horse that races or point-to-points as well needs the six-monthly booster on top. The rule that binds a horse is the strictest one it competes under, not the one it used last.
In Northern Ireland
The same rulebooks apply north of the border. Down Royal and Downpatrick race under the IHRB's rules, Showjumping Ireland runs an Ulster region with its own league and Grand Prix series, and Eventing Ireland's Northern Region takes in the six counties. The exception is the Pony Club: Northern Ireland's branches are Area 17 of the UK's Pony Club, not part of the Irish Pony Club, and follow its rules.
Why the calendar drifts
Almost nobody's vaccinations stay on the dates they were planned. The vet's visit moves, the horse is off-colour the week it was due, and every date after it shifts. With racing counting in six-month steps, Showjumping Ireland counting to 365 days and restarting a course that slips, and Eventing Ireland counting a new course in 60-day and six-month windows, "is she still in date for the weekend?" can only be answered from the exact date of every dose in the passport.
Questions people ask
Is flu vaccination compulsory for horses in Ireland?
Not by law: no Irish statute requires a horse to be vaccinated against equine influenza. It is compulsory to race, to compete under Showjumping Ireland or Eventing Ireland, and to enter the Dublin Horse Show, and each of them sets its own intervals. During the 2026 outbreak the Irish Equine Centre advised vaccinating every horse on a premises, whatever it does.
How often does a racehorse need a flu booster in Ireland?
Every six months, under Rule 91 of the IHRB's Rules of Racing, and that has applied to every horse since 1 January 2023. A primary course started now is three doses: the second 21 to 60 days after the first, the third 120 to 180 days after the second. A horse may not run if it has had any vaccine in the previous seven days: there must be six clear days between vaccination and raceday.
What flu vaccinations does Showjumping Ireland require?
Two injections 21 to 92 days apart, a booster 150 to 215 days after the second, and then an annual booster: the 2025 rulebook says less than 365 days later, SJI's veterinary page says not more than 12 months apart. A dose given late means starting the whole sequence again. SJI sets no waiting period between a dose and a show, though its rulebook asks for full recovery after any veterinary treatment before a horse competes, and horses in FEI classes need six-monthly vaccination under the FEI's rules.
Does a horse need its booster to go to the Dublin Horse Show?
No. The RDS says the two-dose primary course, given 21 to 92 days apart, will suffice for entry, and that the booster 150 to 215 days later is not necessary to enter. Every dose has to be entered in the passport, signed and stamped by the vet who gave it. International horses follow the FEI's rules.
Let the passport dates do the remembering
In EquiDiary each vaccination is an entry with its date, the vaccine and batch, and the vet who gave it. Put influenza on a rhythm in the care schedule, every six months for a racehorse or once a year for a showjumper, and the next due date counts from the last dose you logged, with a morning email when it comes up. The vaccination record lays the whole history out on one sheet, ready to print for a show secretary or a new yard.
Start free for 3 monthsSources
- IHRB — Rules of Racing and Irish National Hunt Steeplechase Rules 2026 (as amended to October 2026), Rule 91, and the six-monthly booster from 1 January 2023
- Showjumping Ireland — Rule Book 2025, appendix 11, and SJI — Veterinary info (influenza and tetanus protocols)
- Eventing Ireland — Rule Book 2026 (July 2026), rule 17.2
- RDS Dublin Horse Show — Competition Schedule 2026, general rules and regulations, rule 66, and important information for exhibitors
- FEI Veterinary Regulations 2026, art. 1003
- Irish Equine Centre and Irish Equine Veterinary Association — Equine influenza advisory (30 May 2026), and The Irish Field: equine flu confirmed on 13 premises since March (5 June 2026), IEC recommends equine flu booster (19 June 2026)
- Northern Ireland: IHRB — Racecourses, Showjumping Ireland — regional secretaries, Eventing Ireland — regions and The Pony Club — Area 17
- Irish Pony Club — Eventing Rule Book 2026, rule 3.3 (flu and tetanus)
Each rule as published on the date shown in its source. Governing bodies revise them, often at the turn of a year.
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Next: horse worming in Ireland — the vet's prescription since December 2025, and what it asks about.