The family contract states that you are not permitted to pay the nanny directly unless the agency is made aware.  For that reason, tipping should be done through the agency. If you're especially pleased with the service you've received, just let us know and we'll be happy to add a tip to the nanny's paycheck. Feel free to give gifts for holidays, birthdays, etc. as you see fit.  Just make sure you drop us a line to keep us in the loop!