About 1.5 years later, tracking my credit scores monthly at 3-4 different sites, no discernable effect from paying off the mortgage. Thanks again.

BREAK

On the other hand, allowing 1 of my few personal cards to have a 60% utilization balance has my credit scores nosediving.

Past few years ~20 open CC accounts at any time, since 2018 mostly biz cards (2/2* Chase 5/24), 3 very old (35-40 years) personals cards rarely used (kept open 2/2 age of accounts), 2-3 other personal cards few years old and Bilt MC 9 months old, all personal card significant balances usually paid 1-2 days prior to closing date.

Few weeks ago I paid a large condo assessment via Bilt MC resulting in Bilt balance 60%, decided to wait until "almost due date" to pay (earning interest), Bilt closing date was a week ago. Checking credit scores in the past 1-2 days, they’ve all tanked by 25-30 points, from ~825-835 of the past 10 years (since I’ve been following) to ~795-800, 2/2 overall CC utilization rate 10% (usually 0% or 1%).

Not much of an actual concern, it’s ridiculously annoying that a 45 year impeccable credit history is so adversely affected by something (relatively trivial) of a few weeks duration which will end (be paid in full) in 2-3 weeks. Might think computers in 2024 are able to recognize that a Medicare aged, retired Navy veteran, retired physician with a 45 year credit history who’s never missed a payment and never bounced a check and who paid off a (refinanced 2-3 times) mortgage 12 years ahead of time is NOT a bustout or bankruptcy or non-payment risk.

“What have you done for me lately?”

(* “2/2”: medical abbreviation for “due to” or “secondary to”.)