You need to get this information from your Buyer’s Lender. They will tell either you or your Buyer what interest rate they were quoted.
I generally insert a number slightly higher than the quoted rate to give some “wiggle room” in case the rate was not locked in or rates change, however, do not make it so much higher that it could affect whether your client could afford the payment if the rate was to increase to that number. Ex: quoted rate: 7.2%, I might enter 7.5%.
