Currency
The Icelandic króna (ISK, plural krónur). Not the euro, and not the Danish or Norwegian krone despite the similar word — Iceland is in the Schengen area but not the EU. No one accepts foreign cash. The numbers on price tags look alarmingly large; that is just the denomination, so divide before you panic.
Cards and cash
Iceland is effectively cashless. Contactless Visa and Mastercard, Apple Pay and Google Pay work almost everywhere, including on Strætó buses, at unattended rural petrol pumps and at paid toilets, and you can complete an entire trip without touching a banknote. Two practical warnings: some self-service fuel pumps demand a chip-and-PIN entry rather than a tap, so know the PIN on your credit card before you land, and contactless has a per-transaction ceiling above which you will be asked to insert and enter it anyway.
Dynamic currency conversion
When a card terminal or ATM asks whether you want to be charged in Canadian dollars or krónur, always choose krónur. Choosing your home currency hands the exchange rate to the merchant or the ATM operator, and it typically runs meaningfully worse than your own bank's rate. The same offer appears at hotel checkout and at Keflavík Airport — decline it every time.
Tipping
Not expected, anywhere. Service and taxes are built into the posted price, restaurants do not add a service charge, and nobody is insulted if you leave nothing. Tour guides and drivers will accept a tip for something exceptional, and card terminals sometimes offer the option, but there is no social obligation.
Plugs, voltage and tap water
230 volts, 50 Hz, with Type F Schuko sockets; a two-pin Type C Europlug fits them, so a standard European adapter is all you need. An adapter changes shape only — a Canadian 120-volt-only hair tool needs a real voltage converter, whereas anything marked 100–240V runs fine. Tap water is the other headline: the cold tap is among the best drinking water on earth and buying bottled water here is faintly absurd. The hot tap, however, is geothermal, smells strongly of sulphur, and is not treated to drinking-water standard — let the cold run a few seconds until the eggy smell clears, and expect your shower to smell that way. It is harmless and it does not linger on skin or hair.
Language and safety
Icelandic. English is spoken universally and to a high standard, and nobody expects you to pronounce the place names. Crime is not the risk here — the risks are weather, water and roads. Check en.vedur.is for weather and wind warnings, road.is or umferdin.is for road conditions and closures, and safetravel.is for active alerts every single morning; conditions change within hours and highland F-roads are summer-only. Sneaker waves on the black sand beaches, especially Reynisfjara, have killed multiple visitors and are the country's most lethal tourist hazard. At geothermal fields, the ground beside the path can be a thin crust over boiling water, so never step over a rope.