Let’s assume her mortgage payment is $1500 a month and she pays it for the next 2 years waiting for the inflation spike you mention-
that’s $36K down the drain - she’ll pay $30K to the bank to avoid paying $6K to the govt in taxes
That 30K could be going into investing at the firesale prices of equities in this market, or just be a sure bet build up of her existing cash savings.
What about the lost interest on her cds the principle of which she would have to cah in to pay down her mortage and the loss of her tax deduction.
Last year was the first time my federal standard deduction exceeded my itemized deduction. So, I currently am not benifiting one bit from having mortgage interest to deduct. Something else to consider...it may be time to pay off the mortgage.