A useful workplace boundary tells people what they can expect from you. Start by identifying the pattern that is causing difficulty: messages late at night, meetings during focused work, or requests with no clear priority. Decide what you can realistically maintain before announcing a limit. A boundary that changes every day is hard for colleagues to plan around.

Be specific about availability and the alternative. You might say: “I check routine messages until six and reply to later ones the next morning. If an urgent incident needs a response, please use our on-call process.” Adapt this to your actual role and team agreements. The point is to establish a shared expectation, not create a rule that contradicts responsibilities you already hold.

If someone pushes back, ask what work requirement your proposed boundary would leave uncovered. You may need to agree on coverage or discuss priorities with your manager. When the issue is too much work rather than availability, saying no through an explicit tradeoff can make the decision clearer than offering another vague apology.

Revisit the agreement after you have tried it. Check whether urgent work still gets attention and whether routine work is more predictable. For a calm opening to that review, use the approach in the first 30 seconds of a difficult conversation: describe what happened, explain its effect, and invite the other person’s view.