January 10, 2000, Revised August 29, 2007
"I have enough cash to increase my down payment from 5% to 10%, or to
pay up to 5 points, but not both… Which is better?"
Paying Points and Increasing the Down Payment Are Investments
You can reduce or eliminate private mortgage insurance (PMI) if you
increase the down payment, and you can reduce the interest rate by
paying points. Both can be viewed as investments on which you make an up
front cash outlay and receives a stream of income in the future. With a
larger down payment, the income is the reduction in monthly payment that
results from the smaller loan and mortgage insurance premium. With
points, the income is the reduction in monthly payment that results from
the lower interest rate.
As with any investment, you can estimate a rate of return. The better
deal is the investment that yields the higher return over the period you
stay in the home.
Factors Affecting the Return on Investment
The return on investment in points is extremely sensitive to how long
you stay in the home. For example, suppose you are in the 28 percent tax
bracket and pay 4.5 points to reduce the rate on a 30-year fixed-rate
mortgage from 8 percent to 7 percent. If you stay in your house for 3
years, your after-tax return is a negative 17.8%. If you stay for 15
years your return is positive 15.9%.
The return on an investment in a larger down payment is much less
sensitive to how long you remain in your house. For example, to reduce
the mortgage insurance premium on the same mortgage from .78% to .52% of
the loan amount, you increase your down payment from 5% of property
value to 10%. The after-tax return over 3 years is 11.3% and over 15
years it is 10.9%.
Finding the Answer in an Individual Case
The moral is very clear. If your time horizon is short, you should
invest in a larger down payment, and if it is long, you should invest in
higher points.
How long is "long"? In most cases the crossover point where the returns
are the same occurs in 8 years or less. However, the cross over point is
affected by a number of factors including your tax bracket; PMI
premiums; the rate reduction you receive for a given increase in points;
and appreciation of your house, which affects how long you'll carry PMI.
You can analyze your own situation with three calculators:
12a.
Rate of Return From Investing in a Larger Down Payment
11c.
Rate of Return From Investing in Points on Fixed-Rate Mortgages
11d.
Rate of Return From Investing in Points on Adjustable-Rate Mortgages