Most likely still comparing options, got busy, or the proposal didn't fully stand out - 5 days isn't unusual for proposal stage. Should I Follow Up: YES - proposal-stage silence at this point is normal and worth one gentle nudge. Best Timing: Now is reasonable, roughly 5-7 days is a good follow-up window. Follow-Up Message: "Hi [Client], just wanted to check in on the proposal I sent over - happy to answer any questions or adjust anything based on your needs!" Second Follow-Up (if still silent after another week): "No worries if the timing isn't right - just let me know if this is still something you're considering, or if I should check back another time." When To Stop: After 2 follow-ups with no response over 2-3 weeks, it's reasonable to stop and move on. Prevention: 1) End proposals with a specific question to prompt a reply, 2) Set a proposal validity date to create gentle urgency, 3) Follow up automatically 3-5 days after any proposal, 4) Keep initial proposals concise to reduce decision fatigue, 5) Offer a quick call option for easier next steps.