Tips? Cash?

No tipping on Rick Steves tours:
https://www.ricksteves.com/tours/the-most-value-for-your-money

No tips are expected for anyone that provides a service (such as guides, bus drivers, restaurant staff, hotel staff) on a Rick Steves tour.

I agree with my pals here but will add that sometimes someone who is new to the RS system will try to take up a collection. I usually say loudly....Rick says tips are included.

I was on a tour of England once that had about 75% retired teachers. The joke was that we sang "The Wheels on the bus go round and round" nearly every day. At one point one of the tour members found a book of the same, purchased it and we chipped in a very minimal amount and all signed it. That was pretty cute.

NO! Please no. Even the tour leaders mention that we've already paid it. On a rare occassion someone will, hey let's write a card and everyone sign it or let's some other thing....I still say No. They are living out of a carry on and on to the next tour. They don't want stuff to carry around either. Write a really nice email to the RS office after the tour, to let them know about the superb experience you had due to your tour leader.

And though tips are included on tour items (guide, driver, hotel) depending on where you are going there may be some expectation of tips at restaurants or other places you are going independent of the tour. You should tip in the local currency, which you can easily get at an ATM on arrival to the airport or in towns along the way.

Ditto to the comments about getting guides gifts - they are compensated for their work and simply don't need to drag around extra stuff especially if they're doing back to back tours. I have taken a nice thank you card with me and written a heartfelt thank you as well as buying them a drink during happy hour if that situation arose organically. That seems to have been appreciated more than "things". Enjoy your tour!