Letâs look at a hypothetical spontaneous chemical reaction: The quantity of usable energy (chemical potential) in a reaction is called the Gibbs Free Energy (DG). DG is the difference between the energy contained in the products of a reaction and the reactants: DG = (energy of products) - (energy of reactants)
That's why some financial experts feel it's more realistic to think in terms of your net income, aka take-home pay, and that you shouldn't use any more than 25% of your take-home on your mortgage payment.
By sending $1,300 to your lender monthly, you will overpay your mortgage by $1,200 annually, which is a 13th payment. Assuming a $300,000 mortgage at 4.000%, look at how the math works 1  : Bank-managed bi-weekly mortgage payments pays off in 26 years, 0 months.