Portugal on a Spanish Licence — No IDP, But the Electronic Tolls Catch You

For a Spanish driver, Portugal is about as close to home as a foreign country gets. You keep to the right, the urban limit is still 50, motorways still run to 120, the alcohol limit matches at 0.05, and there is no IDP to arrange — your licence simply works. So instead of rehearsing rules you already know, this page is about the one thing that genuinely costs Spanish visitors money: how Portugal charges for its motorways.

The toll system is the real difference

Spain has been scrapping motorway tolls; Portugal still charges, and it does so in a way that trips up first-timers. Many routes use conventional booths or the Via Verde lane, but a whole network of ex-SCUT motorways (large stretches of the A22 in the Algarve, the A24, A25 and others) has no booths at all. Overhead gantries photograph your plate and bill the registered keeper afterwards. Drive these without arrangement in a hire car and the toll reaches you weeks later as a charge plus the rental company’s admin fee — sometimes several times the toll itself.

The fix is simple: ask the rental desk to fit or register an electronic tolling device when you collect the car, or buy a temporary prepaid toll card. Then the gantries just debit you and there is nothing to chase.

Everything else you already know

Limits are 50 in town, 90 on rural roads, 120 on motorways, enforced by fixed and mobile cameras — the same kit you’re used to from the DGT. A general speeding penalty runs €60–300, and the alcohol limit, though equal to Spain’s, drops to 0.02 for newly qualified drivers, so don’t assume the “one beer” margin. If a fine does follow you home on a rental, our guide on who pays driving fines abroad covers how cross-border enforcement works between EU states.

Before you set off

Fuel is around $1.88/litre, the emergency number is 112, and a warning triangle and reflective vest must be in the car. For the complete ruleset see the Portugal driving guide, and if you want to sanity-check tolls and fuel for a longer route, the fuel cost calculator helps you budget before you go.