If you have a Singtel line, the cheapest safe way to stay connected overseas in 2026 is to buy a ReadyRoam data pass before you go, from S$5 for a single neighbouring country. The expensive way is the one Singtel switches on by default: pay-per-use data billed at S$25 per MB in most countries, which works out to roughly S$25,600 for a gigabyte. That gap is the whole story of Singtel roaming. Get it right and a two-week Japan trip costs you under S$20 in data. Get it wrong, leave roaming on, and a few minutes of Google Maps can put four figures on your bill. This guide lays out every current ReadyRoam tier with prices, the pay-per-use rates straight off Singtel's own rate card, the voice-call increase that hit on 19 June 2026, and the precise point where a travel eSIM from Airalo or Holafly beats sticking with your Singtel number.
Singtel gives you two ways to use data abroad, and they sit at opposite ends of the price scale. ReadyRoam is a prepaid data pass you buy in the My Singtel app, from S$5, valid for 30 days across up to 157 destinations. Pay-per-use is the fallback that runs the moment you switch on data roaming without a pass, charged at the standard rate card. For the overwhelming majority of trips, you want ReadyRoam and you want it activated before you leave the gate.
The reason matters more than the rule. Singtel's published pay-per-use data rate is S$25 per MB in most destinations including Malaysia, Japan and Thailand. A single gigabyte at that rate is about S$25,600. You will never deliberately spend that, but a phone left on auto-update can burn tens of megabytes before you notice, which is how the classic holiday bill-shock story is written. Treat unmanaged roaming the way you treat any opportunity cost: the silent default is the one that costs you.
ReadyRoam is split by geography. ReadyRoam Neighbours covers one selected country from Malaysia, Indonesia or Thailand, which is why it is the go-to for a JB weekend or a Bali long weekend. ReadyRoam Asia spans a wider regional bundle, ReadyRoam Worldwide reaches the long-haul destinations including the US, UK and Europe, and the Monthly Shareable pass suits households or frequent flyers who want one pool across the family.
The table below reflects Singtel's published ReadyRoam line-up as of June 2026. Singtel reshuffles the exact gigabyte-and-price pairings several times a year, and NTUC and airline tie-ins occasionally knock a few dollars off, so confirm the live figure in the My Singtel app before you buy. The structure, not the cent, is what stays stable.
| Plan | Data | Validity | From (SGD) | Coverage |
|---|---|---|---|---|
| ReadyRoam Neighbours | 1GB | 30 days | $5 | One country: Malaysia, Indonesia or Thailand |
| ReadyRoam Neighbours | 6GB | 30 days | $12 | One country: Malaysia, Indonesia or Thailand |
| ReadyRoam Asia | 6GB | 30 days | $18 | Regional Asia bundle |
| ReadyRoam Worldwide | 6GB | 30 days | $40 | Long-haul incl. US, UK, Europe |
| ReadyRoam Others | 1GB | 30 days | $60 | Destinations outside the Asia and Worldwide bundles |
| ReadyRoam Monthly Shareable | 18GB | 30 days | $50 | Shared pool across multiple destinations |
If you finish a ReadyRoam pass early, a data add-on of the same plan auto-activates at the same rate so you stay connected, but it does not extend your 30-day window. Every Singtel mobile plan also ships with AutoReadyRoam switched on, which fires the most affordable matching pass the moment you use data on a preferred network abroad. That is convenient for the forgetful traveller and a quiet money leak for the casual data user, because it can trigger a fresh charge you did not plan for. If you would rather control it manually, turn AutoReadyRoam off in the app before you fly.
Pay-per-use is what you fall back to with no ReadyRoam pass, and the rate card is unforgiving. Below are figures taken directly from Singtel's standard pay-per-use roaming rate document for three of the most-visited destinations. Note the data line is identical across them: S$25 per MB.
Voice got more expensive on 19 June 2026. Singtel raised roaming voice calls, both incoming and outgoing, from S$4.10 to S$6.30 per minute in most countries, on top of a connection fee of S$0.25 per call in Malaysia and Brunei or S$0.35 elsewhere. A 10-minute call home from Tokyo is now about S$63 in airtime alone. If you must take calls abroad, route them through Wi-Fi calling or a messaging app over your ReadyRoam data, not the cellular voice network.
| Destination | Data (per MB) | Outgoing voice (per min) | Send SMS |
|---|---|---|---|
| Malaysia | $25.00 | $0.35 | $0.31 |
| Japan | $25.00 | $6.30 | $0.80 |
| Thailand | $25.00 | $6.30 | $0.80 |
Singtel roaming's real advantage is that your Singapore number stays live, so OTPs, bank SMS and calls still reach you, and there is nothing new to install. That convenience is worth paying a small premium for on a short regional trip. It stops being worth it on three kinds of trip: long stays, heavy-data trips, and destinations outside Singtel's bundles where you would be paying the S$60 Others tier for a single gigabyte.
A travel eSIM is a second data line you scan onto a modern phone in minutes, running alongside your Singtel SIM. For Japan in 2026, Airalo data eSIMs start from around US$4 for 1GB over a few days, with unlimited 30-day plans near US$72 after the early-2026 price rise. Holafly's unlimited daily eSIMs run about US$3.90 a day, and its subscription plan is roughly US$65 a month, around US$2 a day for unlimited data. Run the trip both ways: a 14-day, 10GB Japan holiday is comfortably cheaper on an eSIM than topping up multiple ReadyRoam Asia passes, while a 4-day Bangkok trip on light data is simplest and cheap enough on a single ReadyRoam Neighbours pass.
The smart-money move on a longer holiday is a hybrid. Keep your Singtel line on, but switch off its data roaming and route everything through the eSIM, so your number stays reachable for OTPs while your data runs on the cheaper plan. The same discipline that keeps a household monthly budget honest applies to a trip: pick the data plan that fits the actual usage, not the one that is already switched on by default. If you are deciding which carrier to keep at home in the first place, that feeds into the wider question of the best SIM-only plan in Singapore.
Most holiday roaming horror stories are not bad luck, they are a setting left on. The fix is a 60-second routine before you fly and a couple of checks while you are away. Roaming charges are one of the few travel costs you can take to zero with discipline, unlike flights or hotels, so it pays to treat it as a fixed pre-trip checklist rather than an afterthought, folded into the same plan you use for travel insurance and a travel credit card.
Data roaming is off until you switch it on, but every Singtel mobile plan ships with AutoReadyRoam enabled, which activates the most affordable matching ReadyRoam pass the moment you use data on a preferred network abroad. You can turn AutoReadyRoam off in the My Singtel app if you want to control every charge yourself.
Singtel's published standard pay-per-use data rate is S$25 per MB in most destinations including Malaysia, Japan and Thailand, which is roughly S$25,600 for a gigabyte. This is why you should always buy a ReadyRoam pass, from S$5, before you travel rather than rely on the pay-per-use fallback.
No. There is no refund for unused data, and any allowance left over expires at 23:59 Singapore time on the 30th day after you activate the pass. ReadyRoam validity runs on Singapore date and time, not the local time of the country you are visiting, so buy the data size that matches your actual trip.
It depends on the trip. For short regional trips on light data, ReadyRoam is cheap and keeps your Singapore number live. For long stays, heavy data, or countries outside Singtel's bundles, a travel eSIM such as Airalo or Holafly is usually cheaper per gigabyte. Many travellers run both: Singtel on for OTPs with its data off, and the eSIM for data.
Yes. From 19 June 2026, Singtel raised roaming voice calls in most countries from S$4.10 to S$6.30 per minute for both incoming and outgoing calls, plus a connection fee of S$0.25 or S$0.35 per call. Use Wi-Fi calling or a messaging app over data instead of taking cellular voice calls abroad.
This is general financial information for Singapore, not personal financial advice. Figures change — verify current rates against the official sources above before acting. See our full disclaimer.