GENERAL COMMENTS ON ACCELERATIONS & SPLs ---------------------------------------- Prepayment strategies, especially for mortgages, should consider prepaying unequal extra amounts towards principal. A simple example makes the point. With no prepayment, a 30- year mortgage for $50,000 at 9% is paid off in 360 monthly installments of $402.32 (total interest, $94,835.20). The simplest prepayment strategy, and the one suggested by the article, is to add the same extra amount each month. If an extra $50 were added to every payment, the loan is paid off in 237 payments, and $37,900 is saved in interest. This strategy yields an effective annual percentage rate (APR) of 8.978%. Over the life of the loan, it prepays a total of $11,850 toward the principal. Significantly better results are provided by a strategy using unequal prepayments. If an extra $100 were added to the first 60 payments and $35 to the rest, then the mortgage is retired in only 218 payments, and $45,614 is saved in interest. The effective APR drops to 8.645%, a substantial reduction. And the total prepayment against principal is actually a few hundred dollars less! Still better strat- egies can be developed by gradually tapering the prepayment amount, but this simple examples illustrates the general effect. Another important concern in developing a good prepayment strategy is the effect of interest rate changes. This is particularly important to anyone financed with an adjustable rate mortgage. When, and by how much, the interest is changed will materially affect the performance of any prepayment schedule. Even the best strategy can fall apart because of interest rate fluctuations that weren't taken into account when it was developed. Proper consideration of this issue is a must for anyone thinking of prepaying an ARM. Besides prepaying existing loans, there are alternative borrowing strategies that should also be considered. One of the best, and most under-utilized, is the skip payment loan. In an SPL, specific payments to be skipped are prenegotiated by the borrower and the lender at the time the loan is made. SPLs are very useful in leveling cash flow, and they can be prepaid like any other direct reduction loan. Parents looking ahead to college expenses, for example, can use an SPL mortgage to plan for major cash flow variations years before they actually occur. The best SPL schedules allow you to skip any prenegotiated sequence of payments, not just the same ones each year. In the college planning situation, the first skipped payments probably won't occur until many years after the loan begins. SPLs are also useful to individuals with fluctuating income, or who experience cash crunches due to holiday gift-giving, vacation costs, or other predictable expenses.