Tipping for free tours

We are thinking to join free tours in Talinn and London. never done it before. Please help me to understand what is the guidance for tipping in this case. Thanks a lot

You pay whatever you think it was worth. If you don't think it has been very good then don't leave anything, but as a guide I would probably leave 10€ in Tallin and £10 in London per couple.

I'd go along with Londontowner's £10 per couple in London.

But we tend to take into account the numbers in the tour & then do the maths.

Of course, more people equals more tips but also reduces the personal touch - so we tend to tip less.

Conversely with a very small group we kinda take pity on a good guide.

As a yardstick, a good guide should be very happy with a total of around £50 to £75 for a 2-hour tour.

But the quality of the tour is the main deciding factor.

JB :)