Lecture Practical business math procedures (10/e): Chapter 15 - Jeffrey Slater

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Lecture Practical business math procedures (10/e): Chapter 15 - Jeffrey Slater

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Chapter 15 - The cost of home ownership. After you have mastered the material in this chapter, you will be able to: List the types of mortgages available, utilize an amortization chart to compute monthly mortgage payments, calculate the total cost of interest over the life of a mortgage.

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 List the types of mortgages available Utilize an amortization chart to compute  monthly mortgage payments 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 Calculate and identify the interest and  principal portion of each monthly  payment 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     $1.200.00       $160,000  $88.00           $159,912.00      ($160,000 x .09 x 1/12)    ($1,288.60 – 1,200)     ($160,000 ­ $88.00)     $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    $159,823.34     $1,198.68             $89.32            $159,734.02    $159,734.02     $1,198.01             $89.99            $159,644.03    $159,644.03     $1,197.33             $90.67            $159,553.36 ...         ( $159 ,912 x .09 x 1/12) ($1,288 – 1,199.34)  ( $159 ,912 ­ $88.66) 15 13     $159 ,823.34     $1,198.68             $89.32             $159 ,734.02     $159 ,734.02     $1,198.01             $89.99             $159 ,644.03     $159 ,644.03... Prepare an amortization schedule 15 3 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 15 4 5.50% 10.86 9.51 8.18 7.56 6.88 6.51 6 .15 5.68...  $88.00            $159 ,912.00      ($160,000 x .09 x 1/12)    ($1,288.60 – 1,200)     ($160,000 ­ $88.00)      $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)

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Mục lục

  • Chapter 15

  • Slide 2

  • Slide 3

  • Table 15.1 - Amortization Chart (PARTIAL) (Mortgage principal and interest per $1,000)

  • Computing the Monthly Payment for Principal and Interest

  • Computing Monthly Payment by Using an Amortization Chart

  • Slide 7

  • Table 15.2 - Effect of Interest Rates on Monthly Payments

  • The Effect of Loan Types on Monthly Payments

  • Hidden Cost in Purchasing a Home

  • Calculating Interest, Principal, and New Balance of Monthly Payment

  • Slide 12

  • Table 15.3 - Partial Amortization Schedule

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