How much should I tip guides and porters? - Day

Trekking Guides
Daily Tip About $15 to $20 per day depending on how much you are satisfied with their service and the difficultness of the trek.
Total for a Multi-Day Trek For a week-long trek, you may want to consider tipping $100-$150.

Porters
Daily Tip About $10-$15 a day.
Total for a Multi-Day Trek For a week-long trek, this would translate to about $40-$90.

Additional Tips

Group size If you go as part of a large group, you may want to increase your tip, as guides and porters usually share among themselves any tip they get.
Service Quality You may give extra if you think the service has been outstanding.
Cultural Context Although it may not be obligatory, tipping is very well appreciated. This would be one way to show your appreciation for the employees’ attention and work toward you.

Always contribute in cash it is the most straightforward way they will be told about your appreciation. More questions on tipping or trekking in Nepal?