Birthdays, weddings, new babies, retirements. It can feel like there is always something to celebrate in the workplace. But are you obligated to put money toward a gift for Jane’s new baby? And who should pick up the tab for lunch on Jack’s last day before retirement?

In the second installment of “Financial Etiquette: Workplace Edition,” LinkedIn’s career expert Nicole Williams gives tips on how to celebrate the big moments in your coworkers’ lives.

Do you always contribute money toward gifts for coworkers? When, if ever, do you decline?