An interest-only loan buys you the lowest payment and the strongest DSCR today, while an amortizing loan pays down the balance with every check — and the right choice depends on your hold period and exit plan. Investors comparing interest-only vs amortizing loans often stop at the monthly payment. That number matters, but the structure behind it also changes how your deal qualifies, how it cash-flows, and what you still owe when you sell or refinance.
How the two structures work
An amortizing loan splits every payment between interest and principal, so a 30-year note marches steadily toward zero. An interest-only loan charges just interest for a set window, usually five to ten years, then converts to an amortizing payment for the remaining term. During that window the balance never drops. Afterward the payment rises, because the same principal must be repaid over fewer years. The Consumer Financial Protection Bureau covers these basics well, and they apply to rental loans just as much as to home loans.
What interest-only does for payment and DSCR
DSCR lenders qualify a rental on rent divided by payment, so a lower payment lifts the ratio directly. Take a $300,000 loan at 7.5 percent: the interest-only payment is $1,875, while the 30-year amortizing payment is about $2,098. On the same $2,500 rent, that gap is the difference between a comfortable ratio and a borderline one. Consequently, many DSCR programs offer a ten-year interest-only option precisely to help strong properties qualify for more leverage.
What amortizing does for your equity
Amortization is forced savings. Early payments are mostly interest, yet the principal share grows every month, and after ten years a meaningful slice of the balance is gone. That equity widens your refinance options and cushions you if values dip. Investors planning to hold a property for decades often prefer watching the balance fall.
Interest-only vs amortizing loans: how to choose
- Hold period: selling or refinancing within the interest-only window favors IO; a forever hold favors amortizing.
- Cash flow: when monthly margin is thin, interest-only adds breathing room and can rescue the DSCR.
- Payment shock: budget for the higher post-IO payment now, not in year ten.
- Balance at exit: interest-only means you owe at payoff exactly what you borrowed.
Run both versions of your deal through our DSCR calculator before you lock anything.
A typical deal
An investor buys an Orlando rental for $340,000 with a 75 percent LTV DSCR loan of $255,000 at 7.5 percent. With taxes and insurance near $460 a month, the amortizing payment lands around $2,243 against $2,700 in rent — a 1.20x DSCR that misses the program’s 1.25x floor. The ten-year interest-only option drops the payment to about $2,054 and lifts the ratio to 1.31x. The loan approves at the full 75 percent, and the investor plans a refinance long before the window closes.
Compare both structures on your deal
Alpha Equity Lending prices interest-only and amortizing loans side by side for investors across Florida and nationwide. Send your property, rents, and goals through our submit your deal page, and we will show you both paths — in English or Spanish.
By Andres Jara — Alpha Equity Lending (NMLS #1855083). 20+ years in real estate finance, an MS in Finance, and an active South Florida investor and landlord.
