In Warsaw, it is always best to use the services of radio taxi because these are the most reliable and because the operators usually speak English. This is also true in Łódź. The standard charge is about zł 8 for the first kilometer (½ mile) and approximately zł 2–3 for each kilometer thereafter (about 50% more at night and during holidays). You do not need to tip taxi drivers, although you can round up the fare to the nearest złoty. Avoid unmarked Mercedes cabs as well as taxis that do not have a number and a name of a company you know on the top. Those "independent" taxis are likely to charge far more than the going rate.