Your report within 4 weeks of inspection, or 10% off your invoice. That is the 4/10 Guarantee, and it is a commitment on the invoice rather than a line in a brochure. The clock starts at the site inspection instead of at signing, which means scheduling is the honest thing to talk about early — particularly if you are working toward a budget deadline. The four weeks are 28 calendar days, from the site inspection to delivery of your draft report. The clock pauses while we are waiting on documents or access we have asked the association for. If we miss it, 10% comes off your final invoice. For some large or complex studies the window is longer, and when it is, your contract says so before you sign.