The EUR 1.50 ticket you buy in a Roman tobacconist is not a metro ticket. It is a time ticket, and the single sentence that matters on ATAC's own page is that in the metro it is valid for one journey only, across as many line changes as you like, provided you never leave the gates (ATAC, BIT, checked 15 September 2026). Walk out of the barriers at Termini to change platforms the wrong way, or to buy a coffee, and your second entry needs a second ticket even if eighty of your hundred minutes are left.
The other word to learn is convalida, validation. Rome does not treat an unvalidated ticket as a valid ticket in a wallet; it treats it as no ticket at all, and that applies to a EUR 22.00 three-day pass exactly as it does to a single fare.
Which ticket fits your stay
Rome sells a small set of travel titles that a short-stay visitor would plausibly buy, and the choice depends on journeys per day rather than on nights in the city. The table compares the five most useful ones on price and how long each lasts once you validate it.
| Ticket | Price (EUR) | Validity |
|---|---|---|
| BIT | 1.50 | 100 minutes from validation |
| 10-BIT (MultiBIT) | 15.00 | Ten separate 100-minute rides |
| Roma 24 ore | 8.50 | 24 hours from first validation |
| Roma 72 ore | 22.00 | 72 hours from first validation |
| CIS (weekly) | 29.00 | 7 days from first validation, to 24:00 on day seven |
Prices are published by ATAC on its ticket list and confirmed independently in Regione Lazio's fare-system annex to the transport service contract, the December 2025 update issued in March 2026 (both checked 15 September 2026). The Roma 48 ore, not shown above, sits between them at EUR 15.00.
The arithmetic is unforgiving and worth doing before you buy. A Roma 24 ore at EUR 8.50 only beats individual BITs from the sixth validation onwards, and most visitors walking a compact centre do not make six separate journeys in a day. The 10-BIT is the same EUR 1.50 per ride as a single BIT, so it saves you queueing, not money.
What a BIT actually buys
A BIT, biglietto integrato a tempo, buys 100 minutes of travel across Rome's integrated network rather than one ride. Inside that window you can board as many ATAC buses, trams and trolleybuses as you want, and ATAC states it is also good for one journey on Trenitalia regional trains within Rome's urban territory (ATAC, BIT, checked 15 September 2026).
The metro is the exception that catches people out. One journey means one entry through the gates; changing between lines A, B, B1 and C is free as long as you stay inside. This is also why the transfer rule runs the other way: ATAC's ticket pages say the title must be validated at the start of the journey and again when you transfer into the metro, and that a BIT re-stamped before the hundredth minute stays valid to the end of that metro trip.
The same logic governs the passes. A Roma 24 ore, 48 ore or 72 ore and the weekly CIS all cover Roma Capitale on buses, trams, trolleybuses, the metro, Trenitalia second-class urban services, Metromare, Termini-Centocelle and the urban section of the Roma-Viterbo line, plus Cotral urban routes and bus lines 520 and 720 to Ciampino airport (ATAC, Roma 72 ore and ATAC, CIS, checked 15 September 2026). Unlike a BIT, they allow unlimited metro entries for as long as they run.
Tapping a bank card instead
Tap & Go turns a contactless bank card, phone or smartwatch into the ticket itself, and for most visitors it is the simplest answer. ATAC accepts contactless Mastercard, Visa, American Express, JCB and UnionPay cards, and digitised cards on NFC phones and watches, on all its surface lines and Roma Tpl buses, on metro lines A, B/B1 and C, and on the Roma-Lido, Roma-Viterbo and Termini-Centocelle railways (ATAC, Tap & Go, checked 15 September 2026).
What a tap charges you is a BIT. ATAC's English explainer states that the ticket generated is valid for 100 minutes from the first tap and for one metro journey only, exactly like the paper version (ATAC, How does Tap & Go work, checked 15 September 2026). There is a cap: ATAC applies a best-fare rule under which, once you have bought more than five 100-minute tickets on the same card within 24 hours, the sixth is charged at EUR 8.50, the price of the day pass.
Two limits are worth stating plainly. Tap & Go is an individual service for the cardholder, so you cannot tap a family of four through on one card the way you can in some other cities. And if an inspector stops you on a Cotral surface bus or on the Metromare or Roma-Viterbo railways, ATAC says you need the Tap & Go app on an NFC Android phone to prove the tap; on Trenitalia urban trains you show the card or quote the first six or last four digits of its number.
Where tickets are sold
Paper tickets are sold across roughly 2,200 retail points in Rome and the surrounding area, including tabaccherie, newsstands and bars, of which about 1,000 also sell electronic titles (ATAC, Canali di vendita, checked 15 September 2026). The table below sets out the four channels a visitor realistically uses.
| Channel | What it sells | Practical note |
|---|---|---|
| Machines in metro stations | All standard tickets and passes | FULL machines take cash and cards, LIGHT machines cards only |
| ATAC ticket offices | The full range, 07:00 to 20:00 daily | Staffed counter, useful for pass activation |
| Tabaccherie and newsstands | Paper tickets at about 2,200 points | Roughly 1,000 are set up for electronic titles |
| Tap & Go and partner apps | A card used as a ticket, or a digital title | Nothing to validate on paper |
ATAC also lists ticket machines at major bus terminals and on the Metromare and Roma-Viterbo lines, and sells through rail-station retailers across Lazio and through app partners including MooneyGo, Telepass, TicketAppy and Trenitalia (ATAC FAQ, Dove posso acquistare i titoli di viaggio, checked 15 September 2026). Buy before you reach the stop: a tabaccheria that has closed for the afternoon is the most common reason people board without a ticket.
How to validate, step by step
Validation is the act that starts a ticket's clock, and Rome requires it on every title including the multi-day passes. Regione Lazio's fare annex puts it in one line: before use, the ticket must be validated in the appropriate validators, and once validated it is personal and non-transferable. ATAC's general conditions of carriage add that you must validate immediately at the start of the journey, keep the ticket for the whole trip, and show it on request.
A 10-BIT works the same way ride by ride. Each of the ten segments is validated separately at a validator on a bus, tram, train or in a metro station, and ATAC describes the card as being reactivated for a further 100 minutes each time you present it (ATAC, MULTIBIT 10-Bit, checked 15 September 2026). Nothing happens automatically because you own the card.
The passes are where visitors go wrong, because a pass feels like a licence rather than a ticket. ATAC's wording on the Roma 48 ore is that to be valid the title must always be validated at the start of the first journey (ATAC, Roma 48 ore, checked 15 September 2026). If your first ride of the trip is a bus rather than the metro, that one validation on board is the whole activation.
What an inspector charges you
Ticket inspectors on ATAC services issue an administrative sanction, and the amount is fixed rather than negotiable. ATAC states the penalty for a passenger found without a title or with an irregular one is EUR 104.90, reduced to EUR 54.90 if paid within five days of the report, with the full amount due if paid between the sixth and sixtieth day (ATAC, Multe e rimborsi, checked 15 September 2026). The underlying statutory range quoted on ATAC's ticket pages is EUR 100 to EUR 500.
Payment is now cashless. ATAC states that cash payment to inspectors is no longer possible and that the fine is settled through a PagoPA payment form or on a mobile POS where inspectors carry one, within sixty days of delivery or notification of the report; you also pay the fare for the journey made and to be made, plus procedural and postal costs where applicable. The same page gives thirty days from delivery or notification to contest the report.
What these tickets do not cover
No ATAC ticket or pass gets you to Fiumicino airport by rail. ATAC excludes both the Trenitalia non-stop Roma Termini to Fiumicino service and the Cotral special connection from Roma Tiburtina and Termini to Fiumicino from the Roma 24, 48 and 72 ore tickets and from the weekly CIS (ATAC ticket pages, checked 15 September 2026). Those journeys are priced separately by the operator running them.
The zone boundary is the second limit. A BIT or a Roma pass is a Metrebus Roma title covering zone A, the territory of Roma Capitale; travelling out into Lazio on Cotral needs a Metrebus Lazio title for the right zone, and ATAC notes separately that buses run by Astral in the border zones accept only Metrebus Plus tickets (ATAC, La rete del trasporto pubblico di Roma, checked 15 September 2026).
Three things this guide deliberately does not cover: annual and monthly Metrebus subscriptions, which require a registered card rather than a paper ticket; reduced and exempt categories under Regione Lazio's rules, which depend on residence and status; and tourist city cards sold by third parties, which bundle transport with museum entry under their own terms.
Before your first ride
Decide in the departure lounge which of two systems you are using in Rome, because mixing them wastes money. Either tap one contactless card consistently and let the best-fare cap handle a heavy day, or buy paper at a tabaccheria and validate every single time you board.
If you land at a metro or rail station, buy or tap at the gate and keep the stub until you are out of the system at the far end. If your first move is a bus, have the ticket in your hand before the doors open, feed it into the validator as you step on, and check the printed time. That printed time is the only thing standing between you and EUR 104.90.