Commercial Mortgage Calculator

Enter the loan amount, the interest rate, the amortization period and the loan term. The payment comes from the amortization period, the schedule the principal is repaid over; the term sets when the loan matures. Commercial loans are commonly quoted on a 25- or 30-year amortization with a 5-, 7- or 10-year term, so the calculator also shows the balloon still owed when the term ends.

Yes. The payment math is the same for multifamily, retail, office, industrial, self-storage and mixed-use loans. Enter the terms from your quote; for a floating-rate loan, use today's all-in rate and rerun it at a higher rate to see how much the payment can move.

Commercial loans are usually partially amortizing: the payment is calculated on a 25- or 30-year amortization, but the loan matures in 5, 7, or 10 years, leaving a balloon balance due at maturity. The schedule shows that balloon explicitly — it is the number that drives refinance planning.

The balloon is the principal still outstanding when the loan matures before it fully amortizes. It matters because you must refinance, sell, or pay it off at maturity — so the schedule's ending balance, not just the monthly payment, determines your exit risk.

Yes. You can model an initial interest-only period followed by amortizing payments, the structure most bridge and construction loans use. The schedule shows the payment step-up when amortization begins, which is exactly where DSCR pressure appears.