Amortization

What Is Amortization?

Amortization is the process of paying off a loan through scheduled, periodic payments that include both principal and interest. Each payment reduces the outstanding loan balance, but the split between principal and interest changes over time. In the early years of a mortgage, the majority of each payment goes toward interest. As the loan matures, a progressively larger portion goes toward principal reduction. Understanding amortization is essential for real estate investors because it directly impacts cash flow, equity building, and refinancing decisions.

How an Amortization Schedule Works

An amortization schedule is a table showing every payment over the life of the loan, breaking each one into its principal and interest components. On a $200,000 loan at 7% over 30 years, the monthly payment is approximately $1,331. In month one, about $1,167 goes to interest and only $164 to principal. By year 15, the split is roughly even. In the final year, nearly the entire payment reduces principal. This front-loading of interest is why early payoff strategies and refinancing timing matter so much.

30-Year vs. 15-Year Amortization

A 30-year amortization keeps monthly payments low, maximizing cash flow on rental properties. A 15-year amortization has significantly higher monthly payments but builds equity faster and costs far less in total interest. On a $200,000 loan at 7%, the 30-year schedule costs about $279,000 in total interest while the 15-year schedule costs about $123,000. Most investors choose 30-year amortization to preserve cash flow and deploy capital into additional properties, accepting slower equity build in exchange for scalability.

Interest-Only Periods

Some loan products offer interest-only periods, typically for the first 5 to 10 years. During this time, payments cover only interest and no principal is repaid. Monthly payments are lower, which improves cash flow, but you build zero equity through amortization. Interest-only periods are common in commercial loans, bridge loans, and some DSCR products. They work well for investors focused on cash flow who plan to sell or refinance before the interest-only period ends and payments reset higher.

Amortization and the BRRRR Strategy

In the BRRRR method, understanding amortization helps you model your long-term hold accurately. After the refinance step, you will have a new amortization schedule based on the refinanced loan amount, rate, and term. Your tenants are effectively paying down your mortgage through rent. Over a 30-year hold, the property goes from being leveraged to being free and clear, and the equity build from amortization alone on a $200,000 loan is $200,000 in wealth creation, not counting appreciation.

Amortization Impact on Investment Decisions

When analyzing deals, model the amortization schedule alongside your cash flow projections. Calculate how much equity you will build through principal paydown over your expected hold period. Compare different amortization periods and their impact on monthly cash flow versus total cost. If you plan to hold a property for 5 years, the difference in equity build between a 15-year and 30-year amortization may influence your decision. Factor amortization into your total return calculation alongside cash flow, appreciation, and tax benefits for a complete picture of investment performance.