Chapter 15
The Cost of Home
Ownership
McGrawHill/Irwin
©2011 The McGrawHill Companies, All Rights Reserved
#15
The Cost of Home Ownership
Learning Unit Objectives
Types of Mortgages and the Monthly
LU15.1
Mortgage Payment
1. List the types of mortgages available
2. Utilize an amortization chart to compute
monthly mortgage payments
3. Calculate the total cost of interest over
the life of a mortgage
152
#15
The Cost of Home Ownership
Learning Unit Objectives
Amortization Schedule Breaking
LU15.2
Down the Monthly Payment
1. Calculate and identify the interest and
principal portion of each monthly
payment
2. Prepare an amortization schedule
153
Table 15.1 Amortization Chart (PARTIAL)
(Mortgage principal and interest per $1,000)
Terms
in years
10
12
15
17
20
22
25
30
35
154
5.50%
10.86
9.51
8.18
7.56
6.88
6.51
6.15
5.68
5.38
6.00%
11.11
9.76
8.44
7.84
7.17
6.82
6.45
6.00
5.71
6.50%
11.36
10.02
8.72
8.12
7.46
7.13
6.76
6.33
6.05
7.00%
11.62
10.29
8.99
8.40
7.76
7.44
7.07
6.66
6.39
7.50%
11.88
10.56
9.28
8.69
8.06
7.75
7.39
7.00
6.75
8.00%
12.14
10.83
9.56
8.99
8.37
8.07
7.72
7.34
7.11
8.50%
12.40
11.11
9.85
9.29
8.68
8.39
8.06
7.69
7.47
9.00%
12.67
11.39
10.15
9.59
9.00
8.72
8.40
8.05
7.84
Computing the Monthly Payment
for Principal and Interest
155
Gary bought a home for $200,000. He made a 20% down
payment. The 9% mortgage is for 30 years (30 x 12 = 360
payments). What are Gary’s monthly payment and
total cost of interest?
Computing Monthly Payment by Using an
Amortization Chart
Step 3. Multiply Step 1 by the factor in
Step 2
$160 x $8.05 = $1,288.00
Step 2. Look up the rate (9%) and the term
(30 years) in the amortization chart. At the
intersection is the table factor. ($8.05)
Step 1. Divide the amount of the mortgage by
$1,000
$160,000 = $160
$1,000
156
Computing the Monthly Payment
for Principal and Interest
$160,000 = 160 x $8.05 (table rate) = $1,288.00
$1,000
Monthly
Payment
Total payments Mortgage Total interest
$463,680 $160,000 = $303,680
($1,288.00 x 360)
157
Table 15.2 Effect of Interest Rates
on Monthly Payments
Monthly payment
9%
11%
Difference
$1,288.00
$1,524.80
$236.80
(160 x $8.05)
Total cost of interest $303,680
(160 x $9.53)
$388,828
($1,288.00 x 360) $160,000
($1,524.80 x 360) $160,000
158
$85,248
($236.80 x 360)
The Effect of Loan Types on Monthly Payments
Suppose Gary chose a 15year mortgage vs. a 30year
mortgage. What would be the effect?
15 Year
30 Year
Difference
Monthly Payment
$1,624.00
$1,288.00
$336.00
Total Interest
$100,912
$303,680
($1,624.00 x 180) $140,000
($202,768)
($1,288.00 x 360) $160,000
159
Hidden Cost in Purchasing a Home
Closing Costs Cost associated with the passing of
property from the seller to buyer. Include: lawyer’s
fees, title search, points, etc. A point is a onetime
charge that is a percent of the mortgage.
Escrow Amount A special interest bearing account
in which the buyer is required to deposit 1/12 of the
insurance cost and 1/12 of the real estate taxes each
month
Repairs and Maintenance The cost of keeping the
property up. Includes: paint, wallpaper, landscaping,
etc.
1510
Calculating Interest, Principal, and
New Balance of Monthly Payment
Step 3. Calculate the new principal: Current
principal Reduction of principal (Step 2) =
New Principal $160,000 $88.00 =
$159,912.00
Step 2. Calculate the amount used to
reduce the principal: Principal reduction =
Monthly payment Interest (Step 1.)
$1,288.00$120.00 = $88.00
Step 1. Calculate the interest for a month (use
current principal): Interest = Principal x Rate x
Time
$160,000 x .09 x 1/12 = $1,200.00
1511
Calculating Interest, Principal, and
New Balance of Monthly Payment
2nd
Month
Step 3. Current Principal Reduction of
principal (Step 2) = New Principal
$159,912.00 $88.66 = $159,823.34
Step 2. Principal reduction = Monthly
payment Interest (Step 1.)
$1,288.00 $1,199.34 = $88.66
Step 1. Interest = Principal x Rate x Time
$159,912.00 x .09 x 1/12 = $1,199.34
1512
Table 15.3 Partial Amortization Schedule
Payment Principal
number (current)
Principal Balance of
Interest reduction principal
1
$1.200.00
$160,000
$88.00 $159,912.00
($160,000 x .09 x 1/12) ($1,288.60 – 1,200) ($160,000 $88.00)
2
$159,912.00 $1,199.34
$88.66 $159,823.34
($159,912 x .09 x 1/12) ($1,288 – 1,199.34) ($159,912 $88.66)
1513
3
$159,823.34
$1,198.68 $89.32 $159,734.02
4
$159,734.02
$1,198.01 $89.99 $159,644.03
5
$159,644.03
$1,197.33 $90.67 $159,553.36