The concept is that one of the first checks you write each month is for your own savings. The rationale is that if there is no money left after a person pays their bills, there is nothing to contribute to savings or investments that month.
By establishing a priority to save, a person realizes that the balance of their monthly income must cover living expenses and other discretionary spending. This is a much different strategy than saving what is left over from monthly expenses and other spending.
Many financial experts have likened an amortizing mortgage to a forced savings account because a portion of each payment is applied to the reduction of the principal amount owed. Some homeowners have taken that concept further with a shorter term mortgage to build equity faster.
In the example below, a $250,000 mortgage at 4% interest is compared with two different terms. The 30 year mortgage would have payments of $1,193.54 each month with the first payment having $360.20 being applied to the principal. Each payment would have an increasingly larger amount applied to the principal.
The 15 year mortgage would have payments of $1,849.22 each month with the first payment having $1,015.89 being applied to the principal. The $665.68 difference in payments goes toward reducing the loan amount and acts like a forced savings.
A homeowner might opt for the longer term and intend to put the difference in the two payments in a bank savings account each month or make an additional principal contribution to pay the mortgage down. However, as any person responsible for paying household bills knows, there will always be something that comes up that could hijack your intentions.
By committing to the shorter term mortgage, a borrower is committing to make the higher payment each month and the benefit is that it will reduce your principal balance faster.