Albert wanted to buy a house valued at $380,000. The usual down payment of for the house is 30%. How much is the monthly payment for 20 years? If you agree, after the down payment the real estate can lower the interest rate by 0.30% if you pay additional $2,000. Thus, your new monthly payment will be $4,750. Should you pay additional fee to lower the interest rate? The current rate for saving is 1% monthly and for borrowing is 2% monthly.