How much should you tip on a free walking tour? A BBC report has put the question in the spotlight.

Free walking tours are advertised without an upfront price, but guides rely heavily on voluntary tips.

The article says knowing what to give helps ensure fair pay for hard-working guides.

Tour length matters: three-hour walks typically warrant more than brief one-hour strolls.

Small groups often get more personal attention, which can justify a more generous tip.

Local wages and the cost of living also shape appropriate amounts, the piece says.

Experienced travelers recommend treating the guide like any other hospitality professional.

Critics say calling these tours free is misleading, since the cost shifts to the generosity of guests.

The article says operators may introduce clearer digital payment options to simplify tipping.

Read the full article on tipping etiquette for free walking tours.