FICO 8 calculates "average age of accounts" as total months of all accounts on your credit report (open or closed) from the open date of the account to the pres

FICO 8 calculates "average age of accounts" as total months of all accounts on your credit report (open or closed) from the open date of the account to the present and divides that by the number of accounts. A closed credit line will drop off your report after 10 years after you closed it (or is it 10 years after open date? I don't know which!)