Commercial Mortgage Calculator
Calculate commercial loan payments, maximum loan amount based on LTV, and the balloon payment due at the end of the loan term with amortization beyond the term.
What Is a Commercial Mortgage Calculator?
A commercial mortgage calculator determines the financing structure for income-producing property purchases. Unlike residential mortgages where the loan term equals the amortization period (a 30-year mortgage fully pays off in 30 years), commercial loans typically have a shorter term (5-10 years) with a longer amortization schedule (20-30 years). This mismatch creates a balloon payment, the remaining principal balance due when the loan term expires, which the borrower must refinance or pay off. This structural difference is the most important concept in commercial real estate financing. A $1.5M loan at 6.5% with a 10-year term and 25-year amortization generates $10,122/month payments, but at the end of 10 years, roughly $1.16M remains unpaid. That balloon must be refinanced, and if interest rates have risen, market conditions have deteriorated, or the property has underperformed, refinancing may be difficult or impossible at favorable terms. This "maturity risk" is a core consideration in every commercial property investment. Loan-to-value (LTV) determines how much equity you need. Most commercial lenders require 20-30% equity (70-80% LTV). SBA 504 loans can go to 90% LTV for owner-occupied properties. Bridge lenders may offer 65-80% LTV at premium rates. Your down payment is the gap between purchase price and loan amount, plus closing costs (typically 2-5% of the loan amount for origination, appraisal, legal, and title).
How to Use This Calculator
Enter the Property Value
Input the purchase price or appraised value. Lenders use the lower of purchase price and appraised value for LTV calculation. If you are refinancing, use the current appraised value. For construction loans, lenders may use the "as-completed" value with more conservative LTV limits.
Set the LTV Percentage
Conventional commercial loans: 65-80% LTV. SBA 504: up to 90% LTV for owner-occupied. CMBS: 65-75% LTV. Bridge: 65-80% LTV. A lower LTV means a larger down payment but better interest rates and loan terms. Some investors prefer lower leverage for safety; others maximize leverage for higher equity returns.
Adjust Rate, Term, and Amortization
Rate: current market rates range from 5.5-9% depending on loan type and borrower strength. Term: most common is 5, 7, or 10 years. Amortization: 20-30 years (longer amortization = lower payments but more interest and a larger balloon). Interest-only options are available for the first 1-3 years in many programs.
Plan for the Balloon Payment
The balloon payment is your largest financial risk. Model refinancing scenarios at the balloon date: what happens if rates are 2% higher? What if the property value has declined? What if occupancy has dropped? Build refinancing reserves and maintain strong property performance to ensure you can refinance on favorable terms.
Key Concepts
Balloon Payment
The remaining loan principal due at maturity when the loan term is shorter than the amortization period. A 10-year term with 25-year amortization means significant principal remains unpaid after 10 years. The borrower must refinance, sell, or pay the balloon from other funds. This maturity risk is the defining feature of commercial lending.
Amortization Schedule
The payment schedule that fully repays the loan over the amortization period. Each payment allocates between principal and interest. Early payments are mostly interest; later payments are mostly principal. In commercial lending, the amortization period (20-30 years) exceeds the loan term (5-10 years), creating the balloon.
Recourse vs. Non-Recourse
Recourse loans allow the lender to pursue the borrower's personal assets if the property defaults. Non-recourse loans limit the lender to the property collateral only ("bad boy" carve-outs for fraud excepted). Non-recourse is standard in CMBS and agency lending; recourse is common in bank portfolio loans.
Prepayment Penalty
A fee charged for paying off a commercial loan early. Structures include: yield maintenance (compensating the lender for lost interest at current Treasury rates), defeasance (purchasing Treasury securities to replace the cash flow), step-down (declining percentage, e.g., 5-4-3-2-1), or lockout periods where prepayment is prohibited entirely.
Expert Insights
Amortization Length Is a Powerful Negotiation Lever: Extending amortization from 20 to 30 years reduces monthly payments by approximately 15-20%, dramatically improving cash flow and DSCR. The trade-off: more total interest paid and a larger balloon. For cash-flow-sensitive investments, longer amortization is often worth the higher total cost. On a $1.5M loan at 6.5%, the monthly difference between 20-year and 30-year amortization is approximately $1,500.
SBA 504 Loans Are Underutilized: The SBA 504 program offers owner-occupants (businesses using 51%+ of the space) loans up to 90% LTV with 25-year fully amortizing terms at below-market fixed rates. Structure: a bank provides 50% at market rates, the SBA provides 40% at a fixed rate, and you contribute 10% equity. This eliminates balloon risk and provides the highest leverage available in commercial lending.
Rate Locks and Float-Down Options: Between application and closing (30-90 days), interest rates can move significantly. A 0.25% rate increase on a $2M loan adds $500/month to payments. Request a rate lock at application (typically costs 0.25-0.50% of the loan amount) or negotiate a "float-down" provision that lets you take advantage of rate decreases while protecting against increases.
Frequently Asked Questions
Results are estimates for educational purposes only. Actual amounts may vary based on your specific financial situation, market conditions, and other factors. This calculator does not constitute financial advice.
Run These Numbers Too
Debt Service Coverage Ratio (DSCR) Calculator
Determine whether a commercial property's net operating income sufficiently covers its debt obligations, the key metric lenders use for loan qualification.
Commercial Real Estate ROI Calculator
Calculate total investment returns including cash-on-cash yield, ROI, equity build-up, and appreciation for leveraged commercial property investments.
Cap Rate Calculator
Determine the capitalization rate of a commercial property by dividing net operating income by purchase price, and estimate the gross rent multiplier.
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