Having drastically higher average credit score than that of your spouse sometimes presents a problem. Especially if your incomes are quite different, and you and the spouse are applying for a mortgage together to use both incomes in order to qualify. Both will be on the mortgage application. Normally, the spouse with the higher income is a primary borrower, whereas the spouse with the lower income is a co-borrower.
In ideal scenario, primary borrower has higher income and higher or close to that of the co-borrower average FICO credit score. But that is not often the case, so what happens when the co-borrower spouse has higher credit score?
If the average FICO score of the higher earner is only lower by 20 to 25 points than that of the spouse, he or she can remain primary.