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258 Appendix E: Formulas Used
File name: hp 12c pt_user's guide_English_HDPMF123E27 Page: 258 of 275
Printed Date: 2005/8/1
Dimension: 14.8 cm x 21 cm
The Rent or Buy Decision
Market Value = PRICE(1 +
I
)
n
where:
I
= appreciation per year (as decimal)
n
= number of years
Net Cash Proceeds on Resale = Market Value – Mortgage Balance – Commission
The interest rate is obtained by solving the financial (compound interest) equation
for
i
using:
n
= number of years house is owned
PV
= down p closing costs
PMT
= mortgage p taxes + maintenance
–
rent – (% tax)
(in taxes)
FV
= net cash proceeds on resale
Annual interest rate = 12 ×
i