Interest-Only Periods in Commercial Real Estate Loans: When They Help and What They Cost

Many commercial real estate loans offer a stretch at the start of the term where the borrower pays interest only and no principal. The appeal is obvious: lower payments while a property stabilizes, leases up, or absorbs renovation costs. The tradeoff is less obvious, because an interest-only period does not remove debt service. It defers it, and the payment that eventually arrives is larger than it would have been under full amortization from day one.

How Interest-Only Periods Work

During the interest-only window, the loan balance stays flat. When the window ends, the loan converts to amortizing payments, usually calculated over the remaining amortization schedule. Some loans are interest-only for the full term, which is common on bridge debt and on some conduit and life company loans at moderate leverage. Others carry a partial period of one to several years before amortization begins. The structure is negotiated, and it is often one of the most valuable terms on a term sheet that borrowers overlook.

How Lenders Decide Whether to Offer It

Lenders treat interest-only as a credit concession, so it tends to follow lower risk. The factors that usually drive the decision:

• Leverage: lower loan-to-value files are far more likely to see interest-only terms
• Coverage on the amortizing payment: many lenders size DSCR on the fully amortizing payment, not the interest-only one
• Asset quality and tenancy: stable, well-leased properties earn more flexibility than transitional ones on permanent debt
• Sponsor strength: liquidity and track record matter more when principal paydown is deferred

That second point is the one that surprises borrowers. An interest-only period can improve monthly cash flow without increasing the maximum loan amount, because the lender still underwrites to the payment that arrives later.

Where It Fits and Where It Does Not

Interest-only works best when the business plan expects net operating income to grow: a value-add repositioning, a lease-up, or a property with below-market rents rolling over. The freed-up cash can fund improvements or reserves during the period when income is weakest. It fits poorly when income is flat or declining, because the borrower reaches the amortization date with the same balance and a higher payment against the same cash flow. Deferred principal is still principal.

Planning for the Step-Up

The conversion date deserves the same attention as the maturity date. Model the amortizing payment against conservative income projections, not the pro forma, and confirm the property can cover it with room to spare. Ask how the payment is calculated at conversion, whether any covenants are tested at that point, and whether prepayment terms change. If the plan depends on refinancing before amortization starts, treat that as a separate risk with its own fallback, since refinance conditions at the end of the period are not knowable today.