Both my parents used to work for a bank. For them, the work day started at nine in the morning and ended at 5:00 pm sharp. Day in and day out, this was their routine. They never understood the concept of flexible hours. They questioned why I would bring “work” home. On the other hand, they were always amused that I never needed to take time off work to see the doctor or get the car fixed during office hours.

“Am I expected to work an 8-hour day?” I get this question from employees from time to time, but I believe this is the wrong question to ask. Employees are expected to get their work done, deliver on OKRs and contribute to a positive workplace culture. For the most part, I don’t (and neither should their direct manager) care where or how the work gets done. Of course, it goes without saying (but I’ll still say it), flexible work hours should never impact collaboration or attendance at critical meetings.

Startups are fast-paced, ever-changing environments filled with bright employees. They’re solving complex and fascinating problems and it’s all very exciting. Being a disruptor and part of a paradigm shift is thrilling and the work itself should compel employees to give 100%. Offering flexible hours instills trust in your team and gives employees a sense of ownership to execute on projects in the way that works for them.

That’s not to say there will be no instances when burning the midnight oil for a specific project or tight deadline is required. Make no mistake, there will be times when a critical security issue needs to be addressed after-hours or a client has an urgent need on the weekend. But there should also be opportunities to take it easy and spend a few weeks out of the country or deal with a family or health issue. It’s about flexibility.

Most startups offer flexible hours, and it makes sense. After all, tech is a creative industry unlike working at a bank or factory. As people head back to work after their relaxing summer vacations, my advice to founders and startup execs? Measure productivity by outcomes and results, not timecards.