Remember, “points” are paid to the lender, in exchange for a lower interest rate.
The “down payment” is really just extra dollars that you pay to the Seller, which decrease the amount you need to borrow from the bank to pay the Seller.
So lets buy a $200,000 house at 10% interest (30 year loan), with a 20% “downpayment” (that is, you need to come up with 20% of the purchase price in cash).
Cash down payment = $40,000
Loan amount = $160,000
Monthly payment (10% interest + principal) = $1,404.11
OK, let’s buy the same house, but pay the bank a “point” (i.e., $1,600) to buy down the interest rate by, let’s say 0.5%.
Cash down payment = $40,000
Loan amount = $160,000
“point” = $1,600
Monthly payment (9.5% interest + principle) = $1,345.37
Net Result – you’ve paid $1,600 to save $58.63 per month. (So, over 27 months or so (2 years, 3 months), you’ll recoup that money).
Now let’s try again, but add the $1,600 to the “downpayment”, instead of paying a point.
Cash down payment = $41,600
Loan amount = $158,400
Monthly payment (10% interest + principle) = $1,390.07
Net Result – you’ve paid $1,600 to save $13.92 per month. (So, over 115 months or so (9 years 7 months), you’ll recoup that money).
It’s all complicated by the fact that mortgage interest is tax deductible, the opportunity cost of the $1,600, etc., but, in this case, I guess I’d pay the point.
(Remember, consult with your broker, tax advisor, lawyer, father-in-law, etc., and run your own numbers!)