From mid-2027 every calf born in England is due to carry an electronic ID ear tag. Here is what the rule asks of a keeper, how to order the tags, and what to sort out before the first calf of 2027.
From mid-2027, calves born in England are due to carry an official low frequency (LF) electronic ID ear tag, after Defra's June 2026 delay. The EID chip is expected to sit in one of the two ear tags, and the announcement covers newborn calves, not the existing herd. Order only from Defra-approved suppliers, use an ISO 11784 and 11785 LF reader (a sheep reader works), and keep to the 20-day tagging and 27-day passport clocks. Our note on the 2027 mandate follows the dates as they move.
England's rule is simple to state. Electronic identification becomes mandatory for all newborn calves from 2027, using low frequency technology, so a calf can be scanned instead of read by eye and typed in. The date has moved. In June 2026 Defra said the new traceability system and mandatory EID for calves would launch together in mid-2027, and Livestock Information Ltd gives the same timing. Treat mid-2027 as the working date and not a promise, because this programme has slipped before.
The rule is about calves born after the start date. The announcement does not order existing cattle to be retagged, so animals already wearing two visual tags carry on as they are. Plan around the first calf of the 2027 calving block, not a date on the calendar.
It is an England rule. Wales, Scotland and Northern Ireland are setting their own timetables, and Scotland has favoured a different technology. Our guide to the other three nations covers where each stands. Check GOV.UK before you buy tags for next year's calving.
Three words get mixed up, and the mix-up costs money.
The usual trap is buying a cheaper management tag and assuming it satisfies the mandate. Ask the supplier plainly whether it is an approved official ear tag for cattle. UHF is a separate technology, and a UHF reader cannot read an LF tag. One reassuring detail: the only official information held on the tag is the animal's unique number, so nothing on it needs updating.
The tagging clock does not change. A dairy calf needs its first tag before it is 36 hours old and the second before 21 days; a beef calf needs both before 21 days, one in each ear, with the primary tag yellow and carrying the crown logo, UK code, herd mark and six-digit number. In practice that means inside 20 days, which is the figure I would write on the calving shed wall.
Where the chip goes is the open question. Defra's consultation material said the primary and secondary tags carry the same printed number and that one of the two includes the EID chip. On that reading you are not adding a third tag, you are changing what one of the two is made of. Which ear and which tag will sit in the final legislation, so do not settle your tag order around a guess.
At tagging time, write the number into your calving record that day and check it against the passport application before it goes off. A mismatch is tedious to unpick later. The passport deadline calculator works from the same birth date.
GOV.UK suggests ordering about a year's tags at a time and storing spares securely. My advice is to ask your supplier now which EID ranges they will stock, and not to over-buy plain visual tags for calves due after mid-2027. A box of the wrong tags in your hand at calving is the situation to avoid.
The tag is the legal requirement. The reader is a choice, and there is no regulatory requirement for readers to have specific approval. What matters is that it reads LF tags to the ISO standards.
That helps mixed farms. A low frequency stick reader built for sheep can read LF cattle tags, but a UHF reader cannot. If you already own a sheep wand, test it on a management EID tag in a few cattle before you buy anything. Our sheep EID guide covers what that reader does for the flock register.
Set expectations on range. The standard calls for an LF ear tag to read at 12 cm with a portable reader and 80 cm with a stationary reader. A stick is a close-range tool, so plan to read in the crush or race, not across the pen. Do not buy hardware on the strength of the announcement alone. Wait for the final guidance and ask your supplier what reads reliably in your handling system.
The replacement rule is the existing one. You must order and fit a replacement tag within 28 days of noticing the loss or damage, and each animal keeps the same official ear tag number for life, with an exception for animals born or imported before 1998. So the replacement is ordered from an approved supplier against the animal's existing number. It is not a tag off the shelf.
Movement is where it bites. GOV.UK says to get a replacement before moving an animal off your holding, and an animal cannot leave without official ear tags. That is a real problem on a sale morning.
The new failure mode is a tag that is still on the ear but no longer reads. The final rules for that case are not yet published, so I will not guess at them. Keep the visual tag legible, tell your supplier if a chip fails, and log each replacement in your holding register, because an inspector will look for it.
It changes neither clock. The tag goes in within 20 days, and the passport application must still be with the register within 27 days of birth, day of birth counting as day one. The full rule is in our 27-day passport guide, with the late passport guide for a missed deadline. Movements must still be reported within 3 days: see the 3-day movement rule.
EID is the tag technology and the Livestock Information Service is what processes the data. The new system and EID for newborn calves are due to arrive together in mid-2027, and the BCMS to LIS guide explains what changes for English keepers. Until your holding is migrated you carry on as now.
Where does FarmHQ fit? FarmHQ is a farm office app for UK livestock farms, in pre-launch beta. Its herd record does not mind whether an ID was read by eye or by scanner. Scanning with an EID wand is planned, not live today. Plans and prices are on the pricing page. Nothing here replaces the current Defra guidance.
From mid-2027, following Defra's June 2026 decision to launch mandatory EID for calves together with the new traceability system. It applies to calves born in England after the start date. The date has already moved once, so check GOV.UK and Livestock Information Ltd before ordering tags for the 2027 calving block.
The announcement covers newborn calves and does not order existing cattle to be retagged. Animals already carrying two visual tags continue as they are. If that position changes it will come from Defra, so treat any claim that you must retag the herd with caution until GOV.UK or Livestock Information Ltd confirms it.
Probably, if it is a low frequency stick reader meeting ISO 11784 and 11785, because cattle in England are due to use the same LF technology as sheep. A UHF reader will not read LF tags. Test your reader on a management EID tag first and check its read range in your handling system.
The current rule still applies: order and fit a replacement within 28 days of noticing the loss, from an approved supplier, with the same official number for life. You cannot move the animal off your holding without official tags. Check GOV.UK for the final rules on electronic tags that fail.