Simply take emotion out of the equation. There's no need for guilt or stress. Be clear about the boundaries and maintain the position of power, allowing no exceptions.

First, remember that boundaries aren’t about saying ‘no’ to others; they’re about saying ‘yes’ to your well-being and long-term effectiveness. Guilt often stems from the belief that setting limits makes you less committed or capable. Challenge that by reframing boundaries as a way to protect your energy so you can perform at your best. Communicate your boundaries with clarity and compassion, emphasizing how they enable you to deliver quality work. Managing guilt starts with understanding that prioritising yourself isn’t selfish—it’s sustainable.

I think of boundaries as guardrails on a winding road. Without them, it’s easy to veer off and crash. They don’t limit the journey—they keep you safe while navigating life. "Boundaries are the distance at which I can love you and me simultaneously." — Prentis Hemphill.

As a psychotherapist, first of all I see that it's important to you to be a good employee/colleague. Feeling guilty about setting boundaries is a common experience, especially for those who prioritize the needs of others or being afraid of negative consequences. In my online counseling I often help clients practice setting boundaries and evaluate the potential consequences. Guilt suggests: You've done something wrong and need to apologize or make amends. Ask yourself: Are you truly doing something wrong by setting a boundary and prioritizing your needs? Setting boundaries can be essential for your well-being. Also consider the potential negative consequences of not setting boundaries: burnout, resentment or decreased job satisfaction

This is similar to always saying YES to a job or request. That you will be performing more tasks than you can efficiently and safely handle. Then you will be called inefficient along the way. Saying NO sometimes is not bad at all. Prioritize your work really help a lot. Only make yourself available to assist others when you are somewhat free. Be objective. Do not be afraid to set boundaries and say NO.

Setting boundaries at work can definitely stir up guilt, but it’s such an essential step for maintaining balance. I’ve found that reframing boundaries as not just for me, but for everyone I work with. One strategy that works for me is scheduling non-negotiable breaks and reminding myself that taking care of my mental health makes me better at my job. I also keep a list of the positive outcomes from setting boundaries to reinforce why they matter.