What an Ireland eSIM Card Costs, Line by Line

Irish mobile pricing has settled into a shape that is easy to summarise and harder to actually spend correctly. Roughly €20 buys 28 days of unlimited or near-unlimited data on any of the three networks. Below that, plans get short, small or data-free. That is the whole market in two sentences.

The mistakes all happen in the detail. A top-up that activates a plan you already have and discards the allowance you paid for. A seven-day tier bought for a ten-day trip. An airport counter charging €30 for what a city shop sells at €20. An “eSIM card” that turns out to be a plastic card in the post, arriving after you leave. This page is about the money rather than the technology, and the technology side lives in the full Ireland eSIM guide.

What the price tag hides: an Irish prepaid plan is cheap per gigabyte and expensive per mistake. The data is genuinely good value at €20 to €25 for a month; the ways to waste that money are all structural, and all avoidable if you know where they are.

Three numbers worth holding onto: €15 buys 5 GB over 7 days on Three, €25 buys 25 GB over 28 days on the same carrier, and €20 buys unlimited data for 28 days on Vodafone or Eir. Everything else in this article is a variation on those three prices, and the airport charges about €10 more for the same thing.

“eSIM card” is the wrong name, and it costs people money

An eSIM is not a card. It is a profile downloaded into a chip that is already soldered into your phone. Nothing arrives in the post, nothing goes in a tray, and there is no plastic to lose. If you searched for an Ireland eSIM card, the product you actually want is a data plan, and the seller is either a travel provider or an Irish carrier.

The naming confusion is not pedantry, because the phrase “eSIM card” is used by two different kinds of seller to mean opposite things. Travel eSIM shops use it loosely to mean a data plan, which is harmless. Some local retailers list an “eSIM card” that is actually a physical SIM with a QR code printed on the packaging, and a handful of Irish brands that advertise cheap eSIM deals are plastic-only once you reach the checkout.

That matters in one specific situation. If your phone has no SIM tray — any US iPhone 14 or newer, and the same generation of several Android handsets — then a plastic card is not a cheaper version of the product, it is an unusable one. Five Irish brands fall into that group: 48, Clear Mobile, Virgin Media, Tesco Mobile and An Post Mobile all post a card.

So the first line of any price comparison should be a question: does the thing you are buying arrive as a download or as a delivery? Anything that arrives as a delivery does not work on an eSIM-only phone.

What €15, €20 and €25 buy on each Irish network

These are the prices a visitor actually pays in late 2026, drawn from the carriers’ own published plan cards. They move, so check before you pay.

Three’s seven-day tier is the one nobody writes about and the one a long weekend should buy. Five gigabytes and fifty Irish minutes for €15 is a better fit for four days than a 28-day plan you will use a seventh of.

The four-week column tells a different story: at €20 to €25 for unlimited data and calls, the Irish market is cheaper than almost any travel eSIM and dramatically cheaper than a daily roaming pass from a US carrier, which runs about US$10 to $12 a day. Two weeks of daily passes is roughly €120 to €170 for one phone. The same fortnight locally is €20.

What that comparison hides is reach. A €20 Vodafone plan is on Vodafone, which recorded the lowest 5G availability of the three networks at 58.7 percent in Ookla’s second-half 2025 measurements. A €25 Three plan is on Three, which is excellent in Dublin and thinner in Donegal. You are not only buying gigabytes; you are buying one network.

The tier ladder, cheapest to largest

Sorted by what you actually get rather than by price, the market looks like this.

Under €1, effectively free: the Vodafone My Vodafone sign-up credit. Registering an account gives €10 of credit, which is voluntary registration with an incentive attached rather than a requirement. It is the cheapest genuine discount in the country and almost nobody mentions it.

€3 to €5: the smallest travel eSIM tiers, typically 1 GB over 7 days. Cheap in the way a single bus ticket is cheap. Fine for a stopover, useless for a holiday.

€12.99 to €15: the monthly unlimited MVNO tier on GoMo, 48 or Lycamobile, and Three’s 7-day tourist bundle. These are different products at the same price. The MVNO tiers are built for residents and run 28 days; Three’s is built for visitors and runs 7.

€17 to €22: the realistic travel eSIM band, buying 10 to 20 GB over 30 days, and the local unlimited tiers on Vodafone and Eir.

€25 to €30: Three’s 28-day 25 GB tourist tier, and the airport counter price for roughly the same thing.

€40 and up: unlimited travel eSIMs with long validity, and multi-country regional plans. Only worth it if the trip genuinely spans more than Ireland.

Per gigabyte, per day, and why only one of those matters

Two ratios get quoted constantly and one of them is nearly useless.

Per gigabyte flatters big bundles and makes small ones look like a rip-off, which is roughly correct as arithmetic and wrong as advice. A 1 GB plan at $3.99 costs $3.99 a gigabyte; a 25 GB Irish plan at €25 costs €1.00 a gigabyte. The second is better value and the first is the one that ruins a holiday, because a gigabyte does not finish a trip.

Per day is the ratio that actually maps to a decision, because a trip has days and a plan has a validity period. €15 over 7 days is €2.14 a day. €25 over 28 days is €0.89 a day. A $3.99 one-gigabyte plan over the 7 days it lasts is $0.57 a day and will still leave you buying a second one on day three.

The ratio nobody computes, and the one that decides value, is cost per day of usable coverage. A plan that costs €2 a day and works where you are driving is cheaper than a plan that costs €0.90 a day and does not.

How much data Ireland actually consumes, by activity

ComReg’s own figure is the best starting point: the average Irish mobile subscriber used 21 GB a month in the first quarter of 2026. That is a resident whose phone spends most of its life on home and office Wi-Fi. A visitor has no home Wi-Fi and is outdoors more, so the per-day figure runs higher.

Build the estimate from what you will do. These are conservative real-world figures.

Two weeks of driving, messaging, navigating and posting photos lands at 6 to 10 GB. Add hotel-room streaming on bad Wi-Fi and it becomes 20 GB. Add daily high-definition video and no fixed bundle is comfortable, which is the only honest case for an unlimited plan.

The most common expensive mistake is buying the smallest tier to keep the headline price down, then topping up at a worse rate on day three. The second most common is buying 50 GB and using 8.

Where unlimited breaks even against a fixed bundle

Unlimited is not automatically better and it is not automatically a trap. It breaks even at a calculable point.

Take Three’s two visitor tiers. The 7-day 5 GB bundle works out at €3.00 a gigabyte; the 28-day 25 GB bundle at €1.00 a gigabyte. If your usage is 6 GB, the small bundle plus a top-up costs more than the large one. If your usage is 2 GB, the small one is correct and the large one is €10 wasted.

Against a fixed 20 GB travel eSIM at roughly $17, an unlimited Vodafone plan at €20 wins on any trip that generates more than about 20 GB, which is a heavy streamer or a remote worker, and loses on any trip that generates 10 GB, which is most of them.

The threshold in practice: under 10 GB of expected use, a fixed bundle is cheaper. Between 10 and 20 GB, they are close and convenience should decide. Above 20 GB, unlimited is the only option that will not require a mid-trip purchase.

One caveat specific to Ireland’s MVNOs: several “unlimited” plans are 100 GB at full speed and then 256 Kbps, and some of those headline prices are promotional and revert after six or twelve billing cycles. Read the line under the price.

Four levers that cut the price without cutting the data

Register a My Vodafone account. €10 of free credit, no obligation, and it takes a few minutes. If you are buying a Vodafone plan anyway, this is the largest single discount available to a visitor.

Buy the 28-day tier instead of stacking 7-day tiers. Two Three 7-day bundles cost €30 for 10 GB and 14 days. One 28-day bundle costs €25 for 25 GB and 28 days. The only reason to buy weekly is a trip genuinely under eight days.

Buy before you land, but not at the airport. The airport counter charges around €30 for a tourist pack that costs €20 in a city shop or online, and the online purchase has no queue. The terminal-by-terminal arrival detail covers what is actually open at each hour.

Skip voice you will not use. A data-only eSIM plus a VoIP app covers most calls to Ireland for pennies. Voice is worth paying for when a car hire desk or a guesthouse needs to reach you, not otherwise.

Validity: the clock that eats your money quietly

Two clocks run on an Irish prepaid purchase and they are not the same clock.

The first is validity, which starts at activation. Three’s 7-day tier runs seven days from the moment the qualifying top-up lands; its 28-day tier runs twenty-eight. Vodafone and Eir run 28 days from activation. Travel eSIMs usually start at first connection to an Irish network, which is the friendliest behaviour and the reason you can install one at home a fortnight early.

The second is credit expiry, and it is where money disappears. Three states that any additional credit from a top-up expires after 30 days if unused. So a €30 top-up against a €15 plan leaves €15 of credit that dies in a month, which is fine if you are staying and wasteful if you are leaving.

Then there is the trap worth reading twice. On Three, topping up by an amount equal to or greater than the plan charge in one transaction activates the plan. If you top up again inside an existing plan period, a new plan period starts immediately and any remaining allowance from the old one is not carried over. Three’s own wording is that the activation charge applies each time you top up by €15 or more in a single transaction.

In plain terms: a €20 top-up on a live €15 plan does not extend the plan, it replaces it, and the unused 3 GB you had left is gone. If you are running low, buy a top-up smaller than the plan charge so it adds credit without re-triggering the plan, or accept that you are restarting.

Why 28 days is not a month, and what that costs on a long trip

Every Irish prepaid plan runs on a 28-day cycle rather than a calendar month, which is a difference of two or three days that matters exactly once: when you stay for a month.

A 30-day trip against a 28-day plan runs out two days early. That is not a rounding error, it is a top-up, and the top-up is priced at the worst rate in the market. The same applies to a 31-day month and, more painfully, to a two-month stay where the drift accumulates to four or five days.

Three ways to handle it, in order of efficiency. Buy a plan with a longer validity if one exists — Eir’s larger prepay tiers include a 90-day option at the top end, and some travel eSIMs sell 30-day rather than 28-day bundles. Buy the next tier up rather than the next top-up, so the extra money buys data instead of just time. Or accept the two-day gap and buy the smallest possible credit top-up rather than a full plan charge, which on Three avoids restarting the cycle.

The related trap is the seven-day plan on a ten-day trip. Three’s €15 tier runs seven days; a ten-day trip needs either a second purchase or the €25 28-day tier, and the second is almost always cheaper than the first. Work out nights, not days, and add one.

Prepaid versus bill pay: the cheap tariff you cannot actually buy

Irish bill pay plans are cheaper than prepay on paper, and they are closed to visitors. That gap explains a lot of the confusion in price comparisons.

A bill pay contract in Ireland requires a credit check, an Irish address and a bank mandate. Some carriers ask for proof of residency. A visitor cannot complete that, which is why every price a tourist sees is a prepay price, and prepay in Ireland carries a premium of roughly €5 to €15 a month against the equivalent contract.

The consequence is that comparing an Irish prepay price to a European contract price is comparing two different products. A German visitor looking at €20 for 28 days of unlimited data in Ireland is looking at the visitor price, not the resident price, and the resident price would not have been available to them anyway.

One more thing bill pay buys that prepay does not: a handset subsidy and a fixed monthly bill. Neither is relevant to a two-week trip.

Buying online, step by step, with no Irish address

Three and Vodafone both sell to a new customer online without an Irish address and without a store visit. The sequence is short and the order matters.

Open the carrier’s prepay page and choose the eSIM option rather than the physical SIM option, because the default on some pages is the plastic card. Enter the details the checkout asks for — a card that works internationally, an email address for the profile, and for Eir an IMEI. Pay the plan charge or a top-up that meets it. Receive either an automatic activation on a compatible handset or a QR code by email. Install it on Wi-Fi. Top up on arrival if the plan activates from a top-up rather than a purchase.

Eir is the one to watch. Eir issues eSIMs and its help pages describe instant delivery and app activation, but the visitor-facing prepay route is less predictable than the other two, and people report the checkout sometimes routing them to a plastic SIM. Confirm you are buying an eSIM at the payment step.

Lycamobile adds a different condition: the profile must be activated in Ireland. That makes it a poor buy-at-home option no matter how good €12.99 for 30 GB looks.

Top-ups, and the arithmetic that punishes them

A top-up is priced worse than the plan it feeds, always, and the reason is that it is sold to someone who has already committed.

The pattern: a 1 GB top-up on an Irish prepay typically costs between €5 and €10 depending on the carrier, against a marginal cost of €1.00 a gigabyte on a 25 GB bundle. You are paying a five- to tenfold premium for buying late.

Three specific top-up behaviours to know. On Three, the plan re-triggers and unused allowance is lost. On Vodafone, top-ups interact with the 28-day cycle and the My Vodafone credit, and the credit is spent before the cash balance. On travel eSIMs, most do not allow top-ups at all — you buy a second plan and switch to it, which is why a slightly larger first purchase is usually the cheaper strategy.

If you expect to run out, buy the bigger bundle at the start. It is the only top-up that is priced fairly.

Two phones on one plan: the couple and family maths

Sharing one plan over hotspot is cheaper on paper and has one failure mode that matters: the host phone is a single point of failure. When it runs flat, walks off, or stays charging in the room, everyone else is offline.

For a couple on ten days, two 10 GB plans cost perhaps $30 against $18 for one 20 GB plan. The $12 buys independent maps and no negotiation about who is using the allowance. Most couples should pay it.

For a family of four with two teenagers, the answer flips: two plans plus a firm rule about video is cheaper and more reliable than four plans, because teenagers will saturate whatever you give them. For a family with young children, one plan and a hotspot on a parent’s phone is entirely adequate.

The Irish-specific cost of hotspot is battery, not data. A phone broadcasting Wi-Fi in a moving car on a western back road drains fast enough that a 10,000 mAh power bank stops being a nice-to-have. The group and family breakdown has the full table.

Data-only means no calls, which changes what you pack

Every price in this article for a travel eSIM is a data price. Voice is a separate product and mostly absent from the travel category.

That is fine for maps, messaging and bookings. It is not fine for three Irish situations: a car hire desk that wants a number it can ring, a guesthouse that texts a door code, and a taxi app that verifies by SMS. If any of those is on your itinerary, either buy a local carrier plan with an Irish number included, or keep your home line active for inbound calls and give that number out.

Paid voice is rarely worth adding to a data eSIM. An hour of calls to Irish landlines over a VoIP app costs roughly the price of a coffee and covers anything short of a long hold with a rental company. The Irish number guide works through the cases where it is not enough.

What a solo, couple and family trip actually spends

Aggregate advice is easy to ignore. Here is the same fortnight priced three ways, using the tiers in this article and the data estimates from the activity table above.

The couple row is the one people get wrong most often. Two separate plans cost roughly twice one shared plan and remove the single point of failure, which for €15 is usually worth it. The family row shows the opposite logic: two plans for four people is the sweet spot, because the parents share one and the teenagers share the other.

The remote worker row is the only one where a local carrier plan beats a travel eSIM on every axis including price. At 25 GB of expected use, an unlimited Irish plan at €20 is simply cheaper than any fixed bundle, and the 5G availability figures in the carrier comparison are what matter rather than the gigabyte count.

When paying more is the cheaper decision

Four cases where the higher price is correct, and each of them appears in this article’s own tables.

Buying 20 GB instead of 10 GB on a two-week drive. The €5 difference buys a week of not thinking about data. On a driving holiday, where the phone is the map, the allowance is not discretionary.

Buying the regional plan instead of the Ireland plan. The extra 20 to 40 percent is the price of the border not being a problem. The alternative is a second plan bought at a service station, which costs more and takes an hour.

Buying a local carrier plan instead of the cheapest travel eSIM. The €8 premium buys an Irish number, domestic calls, and a support line during Irish hours. If a car hire desk is going to ring you, that is money well spent.

Buying the 28-day tier instead of two 7-day tiers. Two 7-day bundles cost €30 and deliver 10 GB over 14 days. One 28-day bundle costs €25 and delivers 25 GB over 28 days. The cheaper-per-day option is also the cheaper total.

The pattern in all four is the same. Irish mobile pricing punishes small purchases and rewards buying the right size once. The cheapest line on the price list is almost never the cheapest way to finish the trip.

There is a fifth case worth naming because it looks like a saving and is not: buying a smaller bundle and planning to use hotel Wi-Fi heavily. Irish hotel Wi-Fi is uneven, guesthouse Wi-Fi is worse, and the moment you need data for navigation or a booking you are outside the building. Budget as though the Wi-Fi does not exist, and treat any that does as a bonus.

What €20 does not include: the exclusions list

Four things sit outside the headline price and each has caught someone.

Northern Ireland. Three’s own terms state that its Visit Ireland allowances are for use in the Republic of Ireland, despite a marketing tile that mentions EU data. A €25 plan that stops at Dundalk is not a €25 plan for an all-island trip. The Ireland and UK options cover what does cross the border.

EU roaming beyond the allowance. Super Surfer includes 30 GB of EU roaming; Vodafone’s unlimited plan and Eir’s prepay include their own caps. Beyond those, standard rates apply, and they are not gentle.

The airport markup. Roughly €10 on the same product, for the convenience of buying it in a terminal.

Card fees. Travel eSIMs are usually priced in dollars, and a euro-denominated card paying a dollar price will take a foreign transaction fee of around 3 percent on top. On a $20 purchase that is 60 cents, which is trivial; on a family buying four plans it is worth a moment’s thought.

What the plan card says that the price tag does not

Six lines on an Irish prepay card change the real cost, and none of them appear next to the number.

The fair-use threshold on anything called unlimited. Vodafone’s unlimited plan and the MVNO equivalents all carry a full-speed allowance followed by a reduced rate, commonly 256 Kbps. That is enough for maps and messages and not enough for video, and the transition is not announced on screen.

The EU roaming allowance. Three’s Super Surfer includes 30 GB of EU roaming, Eir’s prepay around 45 GB, and Lycamobile 23 GB. If your trip continues into Europe, that number matters more than the Irish allowance, because Irish data is plentiful and EU data is capped.

The activation fee. Lycamobile’s National Unlimited carries a €12.99 activation charge on top of the plan price, which turns a €12.99 headline into €25.88 in month one. Read the line under the price.

The promotional period. Several MVNO prices in Ireland are introductory and revert after six or twelve cycles. A €10 plan that becomes €25 is not a €10 plan for anyone staying longer than six months.

The credit expiry. Three expires unused top-up credit after 30 days. So money you add “for later” does not wait for later.

The validity clock. Seven days, 28 days or a calendar month. Only one of those matches your trip.

If you are staying two months or a season

The arithmetic changes completely past 28 days, and the plan that was correct for a fortnight becomes wrong.

Two consecutive 28-day cycles cost €40 to €50 on Three or Vodafone and deliver unlimited or 50 GB of data. That is still competitive with any travel eSIM, which is the point at which a local line stops being an alternative and becomes the obvious purchase.

Three things to set up if you are staying that long. Buy the local plan in the first week rather than the fourth, because the cycle you are on determines when everything else happens. Set up automatic top-up in the carrier app so the plan does not lapse mid-cycle and leave you without data for a day. And check the porting rules if you want to keep the number, because an Irish number attached to a prepaid line persists as long as the line is topped up within the carrier’s dormancy window.

The cheapest arrangement for a season is GoMo or Lycamobile at €12.99 a month on Eir’s network, accepting two conditions: GoMo is app-only and built for residents, and Lycamobile’s eSIM must be activated in Ireland. If neither condition is a problem, that is the lowest per-month price in the country.

If you are buying for someone else

A common situation: someone in the United States or Britain buys an Irish plan for a partner, a parent or a student who is already travelling. It is possible, and there are three constraints.

The profile has to be installed on the phone that will use it. You can buy from anywhere and forward the QR code, but the scan must happen on the target handset, and some providers bind the profile to the first device that installs it. Installing it on your own phone to test it, then trying to move it, does not work.

The validity clock starts when it connects, not when you buy, so buying early is safe on most travel products and unsafe on carrier plans that count from purchase. Check which regime applies before you gift one.

The order belongs to the buyer, not the user. If something fails, support will want the order reference and the email used at checkout, and the traveller on the ground may not have either. Send them a screenshot of the order confirmation and the QR, not just the QR.

For a local Irish carrier plan the same constraints apply plus one more: the top-up usually has to come from a card the carrier will accept, and support is easier if the account holder is reachable by phone.

The practical recommendation: if you are buying on behalf of someone already in Ireland, buy a travel eSIM rather than a carrier plan. It needs no address, no account and no support call in most cases, and the QR can be forwarded in a message.

A fifteen-minute cost audit before you pay

Work down this list and the correct purchase usually identifies itself.

Write down your nights and subtract the ones with reliable Wi-Fi. Convert what is left into a data figure using the activity table above. Decide whether anyone needs to ring you, which decides voice. Check whether the trip crosses into Northern Ireland, which decides whether an Ireland-only plan is even legal for your route. Compare the local tier and the travel eSIM at the same data size rather than at the same headline price. Confirm the product is a download and not a delivery. And confirm when the clock starts.

If two options are within a few euros after that, take the one that works on more networks. The price difference is smaller than the cost of the afternoon you lose when the cheaper one has no signal.

Questions about Ireland eSIM prices

How much does an eSIM for Ireland cost? Travel eSIMs run from about $4 for a small weekly tier to $20 to $30 for a month of generous data. Local Irish prepaid plans run €15 to €25 for a 7-day or 28-day tourist bundle.

Is €20 for 28 days real, or a promotional price? It is the standard market price on Vodafone and Eir prepay, not a promotion, though individual bundles rotate. Check the plan card at checkout rather than the marketing headline.

Why is the airport more expensive? Because it can be. The same Three tourist pack that costs about €20 in a city shop or online is quoted around €30 at Dublin. Nothing about the product differs.

Can I buy an Irish eSIM with a US credit card? Yes. Irish carrier checkouts and travel eSIM shops accept international cards and PayPal. A small foreign transaction fee may apply depending on your card.

Is a top-up cheaper than buying the bigger bundle? Never. A 1 GB top-up typically costs five to ten times the marginal per-gigabyte rate of a large bundle, and on Three a second top-up restarts the plan and discards unused allowance.

Do I pay more for 5G? No. 5G is included in every Irish prepaid plan listed here, and on Lycamobile and GoMo it is standard rather than an add-on.

What happens if I run out on the last day? Nothing worth solving. Buy the smaller of the two remaining options, or use hotel Wi-Fi. This is the one situation where the cheapest top-up is the rational purchase.

Is an unlimited plan worth it in Ireland? Only above roughly 20 GB of expected use. Below that a fixed bundle is cheaper, and the unlimited plans in the travel category are throttled after a fair-use threshold anyway.

Does an Irish prepay plan include 5G? Yes. 5G is standard on every prepaid plan listed here, and on Lycamobile and GoMo it is included rather than sold as an add-on.

Why is my €20 plan charging me for data in Belfast? Because Northern Ireland is the United Kingdom and most Irish plans treat it as outside the allowance. Check the terms, then buy a regional plan for the northern leg.

The cheapest correct answer, by trip

Under a week, city only: Three’s €15 seven-day tier, or a 3 GB travel eSIM if you would rather not visit a shop. Do not buy 28 days for five.

One to two weeks, driving: a 15 to 20 GB multi-network travel eSIM at $13 to $20. It costs the same as the local unlimited tier and works on all three networks, which is the whole point of the purchase.

Three weeks or a month: Three’s €25 28-day tier with 25 GB and 250 minutes, or Vodafone at €20 if you want unlimited and do not mind more time on 4G.

A season: GoMo or Lycamobile at €12.99, accepting that both are built for residents and one of them needs activating on Irish soil.

Ireland plus Northern Ireland: none of the above. Buy a regional plan that lists both countries, and read the cross-border guide before you pay, because this is the one purchase where being wrong costs a second plan at border prices.

One closing note on timing. Irish prepay prices move with promotions rather than with seasons, so there is no cheaper month to buy, and no benefit to booking a plan weeks ahead unless the provider’s own price is rising. The only thing that rewards early buying is availability of the specific tier you want, which matters less than it sounds because every network sells something workable at every price point. If you would rather not choose between carriers at all, a multi-network plan covers all three on one allowance, and the Ireland eSIM options are the shortest route to that.