Interest Only (IO) Loans

Interest Only (IO) Loans are a type of financing where, for a set period, you only pay the interest on the loan without reducing the principal amount borrowed. This results in lower monthly payments initially, making it an attractive option for those looking to minimize their short-term financial outlay. However, it’s crucial to plan for the future because once the interest-only period ends, your payments will increase significantly as you begin to pay down the principal. IO loans can be a strategic tool for managing cash flow, especially if you anticipate higher income in the future or if you’re investing in assets that you expect to appreciate or generate income.

An IO loan has two phases:

Interest-Only (IO) Phase

Duration

Typically, the IO phase spans 5, 7, or 10 years. During this period, your monthly payments exclusively cover the interest on the loan, leaving the principal amount untouched. This feature can be particularly advantageous if you’re seeking lower initial payments, allowing you to allocate funds towards other investments or financial priorities.

Rate Options

You have the choice between a fixed rate, which remains constant throughout the IO phase, or an adjustable rate, which can fluctuate based on market conditions. A fixed rate offers predictability in your payments, while an adjustable rate may provide lower initial rates but carries the risk of future increases.

Amortization Phase

Duration

Following the IO phase, the amortization phase kicks in for the remainder of the loan term, which could extend up to 30 years in total when including the IO period. This phase is characterized by payments that cover both interest and principal, gradually reducing the amount owed on the loan.

Rate Options

Similar to the IO phase, you can opt for either a fixed or adjustable rate. The choice here will affect your long-term financial planning, as it determines the stability or variability of your future payments.

Balloon Payment

In some cases, a mortgage may require a balloon payment immediately following the IO phase. This means that instead of transitioning to regular amortized payments, you would need to pay off the remaining loan balance in one large sum. This scenario typically implies that the amortization phase is effectively zero years, necessitating thorough financial planning to ensure you can meet this large payment.

Understanding these phases and their implications allows you to tailor your loan strategy to your financial situation and goals. For instance, if you anticipate higher income in the future or plan to sell the property before the IO phase ends, an IO mortgage could be a strategic choice. However, it’s essential to consider the potential risks, such as rate increases in an adjustable-rate mortgage or the challenge of a balloon payment, and plan accordingly to safeguard your financial health.

Table 16.3: Comparison of interest-only loans
Pros Cons
Smaller payments up front. A fairly viable option, if you will sell the property relatively soon, say during the IO phase.
Once you have the cash flow to absorb the eventual amortization, the main advantage of an IO loan is not payment relief it is capital efficiency. Cash flow that would otherwise be locked up amortizing the principal of a home stays available to be deployed at a higher expected return. If your taxable portfolio expects 6%–8% and your mortgage costs 6%, IO converts the would-be principal payment into investable capital for the duration of the IO phase. The absolute payment savings versus a 30-year amortizing loan are modest early-amortizing payments are mostly interest anyway, especially at 6%+ rates but the marginal principal you would have paid down is still capital that can compound elsewhere. The trade is the deferred amortization shock at the end of the IO phase: plan to refinance, sell, or absorb the higher payment before then. IO loans can be risky for borrowers who might struggle to secure a traditional loan and perhaps shouldn’t take on debt in the first place. However, if you’re eligible for a standard 30-year fixed mortgage, this concern is less relevant, indicating the interest-only loan isn’t a stretch for your finances.